1
|
Purwasena IA, Fitri DK, Putri DM, Endro H, Zakaria MN. Lipopeptide biosurfactant as a potential root canal irrigation agent: Antimicrobial and anti-biofilm evaluation. J Dent 2024; 144:104961. [PMID: 38527516 DOI: 10.1016/j.jdent.2024.104961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Revised: 03/18/2024] [Accepted: 03/19/2024] [Indexed: 03/27/2024] Open
Abstract
OBJECTIVES Lipopeptide Biosurfactant (LB) is a bacteria derived compound able to reduce surface tension between water and hydrophobic substances and exhibit antimicrobial and anti-biofilm properties. This study aimed to investigate the antimicrobial and anti-biofilm effect of a Lipopeptide Biosurfactant (LB) on Enterococcus faecalis, and its potential use in root canal treatment, either as a standalone irrigation solution or in conjunction with sodium hypochlorite (NaOCl). METHODS LB was extracted from Bacillus clausii isolate and the dry extract was diluted in deionized water. The antimicrobial effect of LB against planktonic E. faecalis was evaluated by determining the Minimal Inhibitory Concentration (MIC50). The anti-biofilm effect was evaluated by Minimal Biofilm Inhibitory Concentration (MBIC50) and Minimal Biofilm Eradication Concentration (MBEC50) assays on biofilm grown on dentin specimen surface. To evaluate the effectiveness of LB as a single irrigation solution and as a pre-irrigation prior to NaOCl, live and dead bacterial cells were quantified using Confocal Laser Scanning Microscopy (CLSM), and cell biomass was assessed. RESULTS LB exhibited an MIC50 and MBIC50 of 100 ppm, with an MBEC50 of 1000 ppm, resulting in 52.94 % biofilm inhibition and 60.95 % biofilm eradication on dentin specimens. The effectiveness was concentration-dependent, at 500 ppm, LB demonstrated comparable antimicrobial efficacy to 2.5 % NaOCl. Pre-irrigation with LB resulted in lower biofilm biomass compared to NaOCl alone. CONCLUSION Pre-irrigation with LB enhanced the antimicrobial effect when followed by NaOCl irrigation. Consequently, LB shows promise as both a standalone root canal irrigation solution and as an adjunct to NaOCl in root canal treatment. CLINICAL SIGNIFICANCE The study highlights the potential of Lipopeptide Biosurfactant (LB) as an environmentally friendly irrigation solution for root canal treatment, demonstrating potent antimicrobial and anti-biofilm properties against Enterococcus faecalis. LB exhibits concentration-dependent efficacy comparable to 2.5 % NaOCl and can be used as a standalone irrigation solution or in conjunction with NaOCl.
Collapse
Affiliation(s)
- Isty Adhitya Purwasena
- School of Life Sciences and Technology, Bandung Institute of Technology. Jl. Ganesha 10, Bandung, 40132, Indonesia
| | - Dinda Kurnia Fitri
- Faculty of Dentistry, Universitas Jenderal Achmad Yani. Jl. Terusan Jenderal Sudirman PO BOX 148, Cimahi, Indonesia
| | - Destaya Mentari Putri
- School of Life Sciences and Technology, Bandung Institute of Technology. Jl. Ganesha 10, Bandung, 40132, Indonesia
| | - Hartanto Endro
- Faculty of Dentistry, Universitas Jenderal Achmad Yani. Jl. Terusan Jenderal Sudirman PO BOX 148, Cimahi, Indonesia
| | - Myrna Nurlatifah Zakaria
- Department of Restorative Dentistry, Faculty of Dentistry, Universiti Malaya, 50603, Kuala Lumpur, Malaysia.
| |
Collapse
|
2
|
Memarpour M, Jafari S, Rafiee A, Alizadeh M, Vossoughi M. Protective effect of various toothpastes and mouthwashes against erosive and abrasive challenge on eroded dentin: an in vitro study. Sci Rep 2024; 14:9387. [PMID: 38653765 DOI: 10.1038/s41598-024-59631-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Accepted: 04/12/2024] [Indexed: 04/25/2024] Open
Abstract
The study aimed to compare various toothpastes and mouthwashes on permanent tooth dentin after erosive and abrasive challenges. 130 sound premolars dentin were randomly submitted to an initial erosive challenge and a cycle of erosive and abrasive challenges for five days. The five experimental groups (n = 26) were: (1) Control group (artificial saliva), (2) Elmex erosion protection toothpaste and mouthwash, (3) Vitis anticaries biorepair toothpaste and mouthwash, (4) Oral B Pro-expert toothpaste and Oral B Fluorinse mouthwash, and (5) MI Paste ONE toothpaste and Caphosol mouthwash. Microhardness, surface roughness values, and the topographical characteristics of the dentin surface were assessed. The highest percentage of recovered dentin microhardness (%RDMH) value was observed in groups 2 and 4, followed by groups 5 and 3, respectively. The %RDMH values in groups 2 and 4 did not demonstrate a significant difference (p = 0.855). The highest percentage of improvement in surface roughness was recorded in groups 2 and 4, with no significant differences (p = 0.989). The atomic force microscopy (AFM) findings were consistent with the surface roughness data. The best recovery of dentin microhardness and roughness were measured with the Elmex and Oral B toothpaste and mouthwash, followed by MI Paste ONE toothpaste and Caphosol mouthwash and Vitis anticaries biorepair toothpaste and mouthwash.
Collapse
Affiliation(s)
- Mahtab Memarpour
- Oral and Dental Disease Research Center, Department of Pediatric Dentistry, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Saba Jafari
- Student Research Committee, Department of Pediatric Dentistry, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Azade Rafiee
- Oral and Dental Disease Research Center, Department of Pediatric Dentistry, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
| | - Marzieh Alizadeh
- Oral and Dental Disease Research Center, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Mehrdad Vossoughi
- Mental Health Research Center, Psychological Health Research Institute (PHPRI), Iran University of Medical Sciences, Tehran, Iran
| |
Collapse
|
3
|
Keskin NB, Bozkurt DA, İnce Yusufoğlu S. Evaluation of dentinal tubule penetration of Irritrol and chlorhexidine irrigating solutions activated using EDDY and photon-initiated photoacoustic streaming. Photodiagnosis Photodyn Ther 2022; 39:102925. [PMID: 35623543 DOI: 10.1016/j.pdpdt.2022.102925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Revised: 04/20/2022] [Accepted: 05/20/2022] [Indexed: 11/24/2022]
Abstract
The aim of the study was to compare the penetration depth and percentage of Irritrol and chlorhexidine (CHX) solutions into dentinal tubules using conventional needle irrigation (CI), EDDY, and photon-induced photoacoustic streaming (PIPS). Sixty oval shaped mandibular premolar teeth were divided into two main groups according to the irrigating solutions as follows; Irritrol and CHX, which were later randomly divided into three subgroups according to the activation technique; CI, EDDY and PIPS (n = 10). Following the irrigation activation procedures, all roots were horizontally sectioned at 3 (apical), 8 (middle), and 13 (coronal) mm from the root apex and then examined with confocal laser scanning microscope (CLSM). Penetration depth (µm) and penetration percentage (%) as determined from the images were analyzed using LSM Image Browser software (Zeiss) and Image J analysis software (V. 1.44p; National Institutes of Health, Bethesda, MD), respectively. Data were statistically analyzed using Kruskal-Wallis and Mann-Whitney U tests were performed for multiple comparisons. In both Irritrol and CHX groups, the PIPS activation system demonstrated the highest values for irrigant penetration depth and penetration percentage compared with the other activation methods. Activation of the CHX and Irritrol the final irrigating solutions with PIPS activation technique improved the penetration depth and percentage solutions into the dentinal tubules.
Collapse
Affiliation(s)
- Neslihan Büşra Keskin
- Department of Endodontics, Faculty of Dentistry, Yıldırım Beyazıt University, Ankara, Turkey.
| | - Durmuş Alperen Bozkurt
- Department of Endodontics, Faculty of Dentistry, Necmettin Erbakan University, Konya, Turkey
| | - Selen İnce Yusufoğlu
- Department of Endodontics, Faculty of Dentistry, Yıldırım Beyazıt University, Ankara, Turkey
| |
Collapse
|
4
|
da Silva LMAV, Cintra LTA, de Alcântara S, Machado NEDS, Benetti F, Ervolino E, Briso ALF. Influence of violet LED associated or not with peroxide gel on inflammation, mineralization, and collagen fiber maturation in dentin and pulp tissue. Photodiagnosis Photodyn Ther 2022; 39:102959. [PMID: 35691564 DOI: 10.1016/j.pdpdt.2022.102959] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Revised: 06/01/2022] [Accepted: 06/08/2022] [Indexed: 11/19/2022]
Abstract
OBJECTIVES To evaluate the influence of violet LED, associated or not with a 17.5% hydrogen peroxide (HP) bleaching gel, on inflammation, mineralization in pulp tissue, and collagen fiber maturation in dentin and pulp tissue. MATERIALS AND METHODS The maxillary molars of eighty Wistar rats were distributed into four groups (n = 10): CONT - without treatment; HP - 30-minute application of 17.5% HP; LED - 20-minute application of violet LED; and HP+LED - application of PH and violet LED. Rats were euthanized and jaws were processed for histologic and immunohistochemical evaluation (IL-17, IL-23, and osteocalcin) and picrosirius red immediately after (T0), and at 7 (T1), 15 (T2), and 30 days (T3) post-treatment, with Wilcoxon, Mann-Whitney, paired T-test, and T-test (α = 0.05). RESULTS HP and HP+LED presented necrosis and severe inflammatory infiltrate. When compared to CONT group, LED presented severe osteocalcin (OCN) immunostaining in T2 and less immature fibers in T2 and T3. CONCLUSION The violet LED caused no severe damage to the pulp tissue, increased IL-17 and IL-23 expression in T0 when associated with HP, and had no influence on pulp tissue mineralization, besides accelerating the maturation of collagen fibers of dentin. CLINICAL RELEVANCE Violet LED therapy induced no inflammation in the pulp tissue of rats and played no role in pulp tissue fibrosis, besides accelerating the maturation of dentin collagen fibers.
Collapse
Affiliation(s)
- Livia Maria Alves Valentim da Silva
- Department of Preventive and Restorative Dentistry, São Paulo State University (UNESP), School of Dentistry Araçatuba, José Bonifácio, Vila Mendonça, Araçatuba, São Paulo 1193, Brazil
| | - Luciano Tavares Angelo Cintra
- Department of Preventive and Restorative Dentistry, São Paulo State University (UNESP), School of Dentistry Araçatuba, José Bonifácio, Vila Mendonça, Araçatuba, São Paulo 1193, Brazil
| | - Sibele de Alcântara
- Department of Preventive and Restorative Dentistry, São Paulo State University (UNESP), School of Dentistry Araçatuba, José Bonifácio, Vila Mendonça, Araçatuba, São Paulo 1193, Brazil
| | - Nathália Evelyn da Silva Machado
- Department of Preventive and Restorative Dentistry, São Paulo State University (UNESP), School of Dentistry Araçatuba, José Bonifácio, Vila Mendonça, Araçatuba, São Paulo 1193, Brazil
| | - Francine Benetti
- Department of Restorative Dentistry, School of Dentistry, Federal University of Minas Gerais (UFMG), Belo Horizonte, Minas Gerais, Brazil
| | - Edilson Ervolino
- Department of Basic Sciences São Paulo State University (UNESP), School of Dentistry, Araçatuba, São Paulo, Brazil
| | - André Luiz Fraga Briso
- Department of Preventive and Restorative Dentistry, São Paulo State University (UNESP), School of Dentistry Araçatuba, José Bonifácio, Vila Mendonça, Araçatuba, São Paulo 1193, Brazil.
| |
Collapse
|
5
|
Wang Z, Zhou Z, Fan J, Zhang L, Zhang Z, Wu Z, Shi Y, Zheng H, Zhang Z, Tang R, Fu B. Hydroxypropylmethylcellulose as a film and hydrogel carrier for ACP nanoprecursors to deliver biomimetic mineralization. J Nanobiotechnology 2021; 19:385. [PMID: 34809623 PMCID: PMC8607665 DOI: 10.1186/s12951-021-01133-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Accepted: 11/10/2021] [Indexed: 12/17/2022] Open
Abstract
Demineralization of hard tooth tissues leads to dental caries, which cause health problems and economic burdens throughout the world. A biomimetic mineralization strategy is expected to reverse early dental caries. Commercially available anti-carious mineralizing products lead to inconclusive clinical results because they cannot continuously replenish the required calcium and phosphate resources. Herein, we prepared a mineralizing film consisting of hydroxypropylmethylcellulose (HPMC) and polyaspartic acid-stabilized amorphous calcium phosphate (PAsp-ACP) nanoparticles. HPMC which contains multiple hydroxyl groups is a film-forming material that can be desiccated to form a dry film. In a moist environment, this film gradually changes into a gel. HPMC was used as the carrier of PAsp-ACP nanoparticles to deliver biomimetic mineralization. Our results indicated that the hydroxyl and methoxyl groups of HPMC could assist the stability of PAsp-ACP nanoparticles and maintain their biomimetic mineralization activity. The results further demonstrated that the bioinspired mineralizing film induced the early mineralization of demineralized dentin after 24 h with increasing mineralization of the whole demineralized dentin (3-4 µm) after 72-96 h. Furthermore, these results were achieved without any cytotoxicity or mucosa irritation. Therefore, this mineralizing film shows promise for use in preventive dentistry due to its efficient mineralization capability.
Collapse
Affiliation(s)
- Zhe Wang
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Engineering Research Center for Oral Biomaterials and Devices, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, 310006, China
| | - Zihuai Zhou
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Engineering Research Center for Oral Biomaterials and Devices, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, 310006, China
| | - Jiayan Fan
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Engineering Research Center for Oral Biomaterials and Devices, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, 310006, China
| | - Leiqing Zhang
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Engineering Research Center for Oral Biomaterials and Devices, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, 310006, China
| | - Zhixin Zhang
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Engineering Research Center for Oral Biomaterials and Devices, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, 310006, China
| | - Zhifang Wu
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Engineering Research Center for Oral Biomaterials and Devices, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, 310006, China
| | - Ying Shi
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Engineering Research Center for Oral Biomaterials and Devices, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, 310006, China
| | - Haiyan Zheng
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Engineering Research Center for Oral Biomaterials and Devices, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, 310006, China
| | - Zhengyi Zhang
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Engineering Research Center for Oral Biomaterials and Devices, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, 310006, China
| | - Ruikang Tang
- Department of Chemistry, Zhejiang University, Hangzhou, 310027, Zhejiang, China
| | - Baiping Fu
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Zhejiang Provincial Engineering Research Center for Oral Biomaterials and Devices, Zhejiang Provincial Clinical Research Center for Oral Diseases, Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou, 310006, China.
| |
Collapse
|
6
|
Xu J, Chen Y, Li X, Lei Y, Shu C, Luo Q, Chen L, Li X. Reconstruction of a Demineralized Dentin Matrix via Rapid Deposition of CaF 2 Nanoparticles In Situ Promotes Dentin Bonding. ACS Appl Mater Interfaces 2021; 13:51775-51789. [PMID: 34693718 DOI: 10.1021/acsami.1c15787] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Dentin bonding based on a wet-bonding technique is the fundamental technique used daily in clinics for tooth-restoration fixation and clinical treatment of tooth-related diseases. Limited bonding durability led by insufficient adhesive infiltration in the demineralized dentin (DD) matrix is the biggest concern in contemporary adhesive dentistry. This study proposes that the highly hydrated noncollagenous protein (NCP)-formed interfacial microenvironment of the DD matrix is the root cause of this problem. Meanwhile, the endogenous phosphate groups of the NCPs are used as pseudonuclei to rapidly induce the formation of amorphous CaF2 nanoparticles in situ in the interfacial microenvironment. The DD matrix is thus reconstructed into a novel porous structure. It markedly facilitates the infiltration of dentin adhesives in the DD matrix and also endows the DD matrix with anticollapsing capability when water evaporates. Whether using a wet-bonding or air-drying mode, the bonding effectiveness is greatly promoted, with the 12 month bonding strength being about twice that of the corresponding control groups. This suggests that the nanoreinforced DD matrix eliminates the dependence of bonding effectiveness on the moisture status of the DD surface controlled only by experiences of dentists. Consequently, this bonding strategy not only greatly improves bonding durability but also overcomes the technical sensitivity of bonding operations of the total-etched bonding pattern. This exhibits the potential to promote dentin bonding and is of great significance to dentistry.
Collapse
Affiliation(s)
- Jiajia Xu
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Hangzhou 310006, P. R. China
- Zhejiang Provincial Clinical Research Center for Oral Disease, Hangzhou 310006, P. R. China
- Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou 310006, P. R. China
| | - Yadong Chen
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Hangzhou 310006, P. R. China
- Zhejiang Provincial Clinical Research Center for Oral Disease, Hangzhou 310006, P. R. China
- Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou 310006, P. R. China
| | - Xiaojun Li
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Hangzhou 310006, P. R. China
- Zhejiang Provincial Clinical Research Center for Oral Disease, Hangzhou 310006, P. R. China
- Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou 310006, P. R. China
| | - Yuqing Lei
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Hangzhou 310006, P. R. China
- Zhejiang Provincial Clinical Research Center for Oral Disease, Hangzhou 310006, P. R. China
- Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou 310006, P. R. China
| | - Chang Shu
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Hangzhou 310006, P. R. China
- Zhejiang Provincial Clinical Research Center for Oral Disease, Hangzhou 310006, P. R. China
- Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou 310006, P. R. China
| | - Qiaojie Luo
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Hangzhou 310006, P. R. China
- Zhejiang Provincial Clinical Research Center for Oral Disease, Hangzhou 310006, P. R. China
- Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou 310006, P. R. China
| | - Lili Chen
- Union Hospital, Tongji Medical College, Department of Stomatology, Huazhong University Science & Technology, 1277 Jiefang Ave., Wuhan 430022, Peoples R. China
| | - Xiaodong Li
- Stomatology Hospital, School of Stomatology, Zhejiang University School of Medicine, Hangzhou 310006, P. R. China
- Zhejiang Provincial Clinical Research Center for Oral Disease, Hangzhou 310006, P. R. China
- Key Laboratory of Oral Biomedical Research of Zhejiang Province, Cancer Center of Zhejiang University, Hangzhou 310006, P. R. China
| |
Collapse
|
7
|
Ozasir T, Eren B, Gulsahi K, Ungor M. The Effect of Different Final Irrigation Regimens on the Dentinal Tubule Penetration of Three Different Root Canal Sealers: A Confocal Laser Scanning Microscopy Study In Vitro. Scanning 2021; 2021:8726388. [PMID: 34737843 PMCID: PMC8531796 DOI: 10.1155/2021/8726388] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 09/20/2021] [Accepted: 09/30/2021] [Indexed: 06/13/2023]
Abstract
This study evaluated the effects of different final irrigation regimens on the dentin tubule penetration of three different root canal sealers using confocal laser scanning microscopy (CLSM). A total of 160 single-rooted extracted mandibular premolar teeth were divided into five groups (n = 32 each) according to the solution used in the final rinse protocol, as follows: 17% ethylenediaminetetraacetic acid (EDTA) (group 1), 17% EDTA and 2% chlorhexidine gluconate (CHX) (group 2), 7% maleic acid (MA) (group 3), 7% MA and 2% CHX (group 4), and 5.25% NaOCl (group 5). Two roots from each group were examined under scanning electron microscopy (SEM) to visualize smear layer removal. Experimental groups were then split randomly into three subgroups (n = 10) and obturated using a cold lateral condensation technique with 0.1% rhodamine B-labelled sealers [either AH Plus (group A), EndoREZ (group E), or Tech BioSealer Endo (group T)] and gutta-percha. Specimens were sectioned and observed by CLSM to evaluate the percentage and maximum depth of sealer penetration at the apical, middle, and coronal levels. Statistical comparison was performed on grouped (apical, middle, and coronal segments) and ungrouped data using two-way ANOVA with Bonferroni post hoc test (p < 0.01). AH Plus showed the greatest tubule penetration while Tech BioSealer Endo showed the least. Resin-based sealers displayed deeper and more consistent penetration. CHX irrigation positively influenced sealer tubule penetration.
Collapse
Affiliation(s)
- Tufan Ozasir
- Department of Endodontics, Faculty of Dentistry, Baskent University, Ankara, Turkey
| | - Birgul Eren
- Department of Endodontics, Faculty of Dentistry, Baskent University, Ankara, Turkey
| | - Kamran Gulsahi
- Department of Endodontics, Faculty of Dentistry, Baskent University, Ankara, Turkey
| | - Mete Ungor
- Department of Endodontics, Faculty of Dentistry, Medipol University, Istanbul, Turkey
| |
Collapse
|
8
|
Maravić T, Baena E, Mazzitelli C, Josić U, Mancuso E, Checchi V, Generali L, Ceballos L, Breschi L, Mazzoni A. Endogenous Enzymatic Activity in Dentin Treated with a Chitosan Primer. Int J Mol Sci 2021; 22:ijms22168852. [PMID: 34445554 PMCID: PMC8396363 DOI: 10.3390/ijms22168852] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 08/11/2021] [Accepted: 08/11/2021] [Indexed: 11/24/2022] Open
Abstract
The aim of this study was to evaluate the effect of different concentrations of chitosan polymer on dentinal enzymatic activity by means of gelatin and in situ zymography. Human dentin was frozen and ground in a miller. Dentin powder aliquots were demineralized with phosphoric acid and treated with three different concentrations of lyophilized chitosan polymer (1, 0.5 and 0.1 wt%) dissolved in distilled water. Dentin proteins were extracted from each experimental group and electrophoresed under non-reducing conditions in 10% SDS-PAGE containing fluorescein-labeled gelatin. After 48 h in the incubation buffer at 37 °C, proteolytic activity was registered under long-wave UV light scanner and quantified by using Image J software. Furthermore, additional teeth (n = 4) were prepared for the in situ zymographic analysis in unrestored as well as restored dentin pretreated with the same chitosan primers. The registered enzymatic activity was directly proportional to the chitosan concentration and higher in the restored dentin groups (p < 0.05), except for the 0.1% chitosan primer. Chitosan 0.1% only showed faint expression of enzymatic activity compared to 1% and 0.5% concentrations. Chitosan 0.1% dissolved in water can produce significant reduction in MMPs activity and could possibly contribute to bond strength preservation over time.
Collapse
Affiliation(s)
- Tatjana Maravić
- Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna-Alma Mater Studiorum, Via San Vitale 59, 40125 Bologna, Italy; (T.M.); (C.M.); (U.J.); (E.M.); (L.B.)
| | - Eugenia Baena
- Area of Stomatology, Health Sciences Faculty, King Juan Carlos University, Avda. de Atenas, 28922 Alcorcón, Spain; (E.B.); (L.C.)
| | - Claudia Mazzitelli
- Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna-Alma Mater Studiorum, Via San Vitale 59, 40125 Bologna, Italy; (T.M.); (C.M.); (U.J.); (E.M.); (L.B.)
| | - Uroš Josić
- Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna-Alma Mater Studiorum, Via San Vitale 59, 40125 Bologna, Italy; (T.M.); (C.M.); (U.J.); (E.M.); (L.B.)
| | - Edoardo Mancuso
- Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna-Alma Mater Studiorum, Via San Vitale 59, 40125 Bologna, Italy; (T.M.); (C.M.); (U.J.); (E.M.); (L.B.)
| | - Vittorio Checchi
- Department of Surgery, Medicine, Dentistry and Morphological Sciences with Transplant Surgery, Oncology and Regenerative Medicine Relevance, University of Modena & Reggio Emilia, 41124 Modena, Italy; (V.C.); (L.G.)
| | - Luigi Generali
- Department of Surgery, Medicine, Dentistry and Morphological Sciences with Transplant Surgery, Oncology and Regenerative Medicine Relevance, University of Modena & Reggio Emilia, 41124 Modena, Italy; (V.C.); (L.G.)
| | - Laura Ceballos
- Area of Stomatology, Health Sciences Faculty, King Juan Carlos University, Avda. de Atenas, 28922 Alcorcón, Spain; (E.B.); (L.C.)
| | - Lorenzo Breschi
- Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna-Alma Mater Studiorum, Via San Vitale 59, 40125 Bologna, Italy; (T.M.); (C.M.); (U.J.); (E.M.); (L.B.)
| | - Annalisa Mazzoni
- Department of Biomedical and Neuromotor Sciences, DIBINEM, University of Bologna-Alma Mater Studiorum, Via San Vitale 59, 40125 Bologna, Italy; (T.M.); (C.M.); (U.J.); (E.M.); (L.B.)
- Correspondence: ; Tel.: +39-051-208-8139; Fax: +39-051-22-5208
| |
Collapse
|
9
|
Pompeu DDS, de Paula BLF, Barros APO, Nunes SC, Carneiro AMP, Araújo JLN, Silva CM. Combination of strontium chloride and photobiomodulation in the control of tooth sensitivity post-bleaching: A split-mouth randomized clinical trial. PLoS One 2021; 16:e0250501. [PMID: 33909659 PMCID: PMC8081218 DOI: 10.1371/journal.pone.0250501] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Accepted: 04/06/2021] [Indexed: 01/10/2023] Open
Abstract
Objective This split-mouth randomized controlled clinical trial assessed the effect of 10% strontium chloride in combination with photobiomodulation (PBM) for the control of tooth sensitivity (TS) post-bleaching. Methods The upper/lower, right and left quadrants of fifty volunteers were randomized and allocated to four groups (n = 25): PLACEBO—placebo gel + simulation of PBM; Placebo + PBM; STRONTIUM—10% strontium chloride + simulation of PBM; and PBM + STRONTIUM—10% strontium chloride + PBM. All groups received tooth bleaching treatment with 35% hydrogen peroxide. For the PBM treatment, the laser tip was positioned in the apical and cervical regions of the teeth bleached in the respective hemi-arch. The laser system was operated in continuous mode, using 1.7 J of energy. A dose of 60 J/cm2 was applied to each point for 16 seconds under 808 nm near-infrared light (100mW of power), with a point area of 0.028 cm2. TS was assessed during a 21-day follow-up, using the modified visual analogue scale. Results In the intragroup assessment, the Friedman test indicated that PBM + STRONTIUM promoted the greatest reduction in TS after the second week of treatment (p ≤ 0.05). The Wilcoxon-Mann-Whitney test indicated that the groups Placebo + PBM, STRONTIUM, and STRONTIUM + PBM did not differ statistically (p ≥ 0.05) in the first and third weeks of treatment The group PLACEBO exhibited the greatest TS in the first three days after each bleaching session. Conclusion The combination of 10% strontium chloride with PBM was effective in reducing post-bleaching TS; however, the combination of 10% strontium chloride with PBM was effective in reducing post-bleaching TS; however, it did not differ from the individual use of Placebo + PBM or STRONTIUM groups assessed after 21 days of follow-up.
Collapse
Affiliation(s)
| | | | | | | | | | | | - Cecy Martins Silva
- Postgraduate Program in Dentistry of the Federal University of Pará, Belem, Brazil
- * E-mail:
| |
Collapse
|
10
|
Schestakow A, Guth MS, Eisenmenger TA, Hannig M. Evaluation of Anti-Biofilm Activity of Mouthrinses Containing Tannic Acid or Chitosan on Dentin In Situ. Molecules 2021; 26:molecules26051351. [PMID: 33802588 PMCID: PMC7961503 DOI: 10.3390/molecules26051351] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 02/26/2021] [Accepted: 02/28/2021] [Indexed: 11/16/2022] Open
Abstract
In contrast to enamel, dentin surfaces have been rarely used as substrates for studies evaluating the effects of experimental rinsing solutions on oral biofilm formation. The aim of the present in situ study was to investigate the effects of tannic acid and chitosan on 48-h biofilm formation on dentin surfaces. Biofilm was formed intraorally on dentin specimens, while six subjects rinsed with experimental solutions containing tannic acid, chitosan and water as negative or chlorhexidine as positive control. After 48 h of biofilm formation, specimens were evaluated for biofilm coverage and for viability of bacteria by fluorescence and scanning electron microscopy. In addition, saliva samples were collected after rinsing and analyzed by fluorescence (five subjects) and transmission electron microscopy (two subjects) in order to investigate the antibacterial effect on bacteria in a planktonic state and to visualize effects of the rinsing agents on salivary proteins. After rinsing with water, dentin specimens were covered by a multiple-layered biofilm with predominantly vital bacteria. In contrast, chlorhexidine led to dentin surfaces covered only by few and avital bacteria. By rinsing with tannic acid both strong anti-adherent and antibacterial effects were observed, but the effects declined in a time-dependent manner. Transmission electron micrographs of salivary samples indicated that aggregation of proteins and bacteria might explain the antiadhesion effects of tannic acid. Chitosan showed antibacterial effects on bacteria in saliva, while biofilm viability was only slightly reduced and no effects on bacterial adherence on dentin were observed, despite proteins being aggregated in saliva after rinsing with chitosan. Tannic acid is a promising anti-biofilm agent even on dentin surfaces, while rinsing with chitosan could not sufficiently prevent biofilm formation on dentin.
Collapse
|
11
|
Retana-Lobo C, Guerreiro-Tanomaru JM, Tanomaru-Filho M, Mendes de Souza BD, Reyes-Carmona J. Sodium Hypochlorite and Chlorhexidine Downregulate MMP Expression on Radicular Dentin. Med Princ Pract 2021; 30:470-476. [PMID: 34153965 PMCID: PMC8562034 DOI: 10.1159/000517887] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Accepted: 06/15/2021] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVE Matrix metalloproteinases (MMPs) are present in radicular dentin and can convert structural matrix proteins into signaling molecules; thus, these enzymes play an essential role in dentin biomineralization and tissue regeneration therapies. Their expression on radicular dentin may be affected by the irrigation solutions used during root canal treatments. This study aimed to evaluate the effects of the most common irrigants on radicular dentin MMP expression. MATERIALS AND METHODS The experimental solutions were distilled water (control), 5% sodium hypochlorite (NaOCl), 18% ethylenediaminetetraacetic acid (EDTA), and 2% chlorhexidine (CHX). Samples were prepared from extracted human teeth. For zymography analysis, root sections were powderized, and dentin proteins were extracted to observe gelatinolytic activity. Root dentin slices were treated with the experimental solutions for immunohistochemical analysis using anti-MMP-2 and anti-MMP-9 antibodies. ANOVA and the Tukey test were performed. RESULTS Zymograms revealed the presence of MMP-2, MMP-8, and MMP-20 in the control group and the EDTA-treated group. Immunohistochemistry confirmed the presence of MMP-2 and MMP-9 mainly associated with the dentinal tubule lumens and occasionally with intertubular dentin. NaOCl- and CHX-treated groups showed lower expression of MMPs than the control group. Immuno-staining for both proteinases in the EDTA-treated group showed higher expression compared to the other experimental groups. CONCLUSION Our results showed that most common irrigants affect MMP expression on radicular dentin. Treatment with NaOCl and chlorhexidine resulted in lower expression of MMPs, while EDTA increased their expression in root canal dentin.
Collapse
Affiliation(s)
| | | | - Mario Tanomaru-Filho
- Department of Restorative Dentistry, São Paulo State University (UNESP), Araraquara, Brazil
| | | | - Jessie Reyes-Carmona
- Department of Endodontics, University of Costa Rica, San Jose, Costa Rica
- *Jessie Reyes-Carmona,
| |
Collapse
|
12
|
Sayed M, Tsuda Y, Matin K, Abdou A, Martin K, Burrow MF, Tagami J. Effects of mechanical abrasion challenge on sound and demineralized dentin surfaces treated with SDF. Sci Rep 2020; 10:19884. [PMID: 33199833 PMCID: PMC7669835 DOI: 10.1038/s41598-020-77035-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2020] [Accepted: 11/02/2020] [Indexed: 11/20/2022] Open
Abstract
This study evaluated the effect of mechanical abrasion on the surface integrity, color change (ΔE) and antibacterial properties of demineralized and sound dentin surfaces treated with silver-diammine-fluoride (SDF). The dentin specimens were divided into two groups: sound and demineralized dentin, then divided into three sub-groups, control (no-treatment), SDF, and SDF + potassium-iodide (KI). Each sub-group was further divided into two groups, one exposed to mechanical brushing and the other without brushing. Specimens were analyzed for the ΔE, surface roughness/surface loss and antibacterial properties (CFU, optical density and fluorescent microscope). Repeated Measures ANOVA was used for statistical analysis of color change while one-way ANOVA was used for CFU analysis. SDF and SDI + KI groups showed significant reduction in ΔE with brushing in the sound dentin group unlike the demineralized group. The surface roughness values were higher for both SDF and SDF + KI groups but roughness values significantly decreased after brushing. Both SDF and SDF + KI groups revealed significantly less surface loss than control. The SDF group showed high anti-bacterial effect after brushing, unlike SDF + KI group. So, we concluded that mechanical brushing improved the esthetic outcome. While, SDF and SDF + KI could protect the dentin surface integrity. SDF-treated dentin possesses an antibacterial property even after mechanical brushing.
Collapse
Affiliation(s)
- Mahmoud Sayed
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45, Yushima, Bunkyo-ku, Tokyo, 113-8549, Japan.
| | - Yuka Tsuda
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45, Yushima, Bunkyo-ku, Tokyo, 113-8549, Japan
| | - Khairul Matin
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45, Yushima, Bunkyo-ku, Tokyo, 113-8549, Japan
- Endowed Department of International Oral Health Science, Tsurumi University, Kanagawa, Japan
| | - Ahmed Abdou
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45, Yushima, Bunkyo-ku, Tokyo, 113-8549, Japan
- Biomaterials Department, Faculty of Oral and Dental Medicine, Modern University for Technology and Information, Mokatam, Cairo, Egypt
| | - Kim Martin
- Department of Operative Dentistry and Periodontology, University Hospital, LMU Munich, Munich, Germany
| | - Michael F Burrow
- Faculty of Dentistry, University of Hong Kong, Hong Kong, SAR, China
| | - Junji Tagami
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), 1-5-45, Yushima, Bunkyo-ku, Tokyo, 113-8549, Japan
| |
Collapse
|
13
|
Firouzmandi M, Vasei F, Giti R, Sadeghi H. Effect of silver diamine fluoride and proanthocyanidin on resistance of carious dentin to acid challenges. PLoS One 2020; 15:e0238590. [PMID: 32941456 PMCID: PMC7498094 DOI: 10.1371/journal.pone.0238590] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Accepted: 08/19/2020] [Indexed: 01/03/2023] Open
Abstract
The aim of this study was to evaluate the effect of silver diamine fluoride and grape seed extract on the microstructure and mechanical properties of carious dentin following exposure to acidic challenge. Ninety-eight molars with occlusal caries were used. In the control group the specimens were kept in distilled water. In the GSE group, the specimens were immersed in 6.5% grape seed extract solution for 30 minutes. In the SDF group, the specimens were immersed in 30% SDF solution for 4 minutes. In the GSE+SDF group, the specimens were immersed in 6.5% grape seed extract solution for 30 minutes and then exposed to 30% SDF solution for 4 minutes. All the groups underwent pH cycling model for 8 days. Microhardness measurements were taken at the baseline before surface treatments and after pH cycling. Elastic modulus was measured, after pH cycling. In the control group, the final hardness was significantly lower than the initial hardness (P = 0.001). In the SDF group, the final hardness was significantly higher than the initial hardness (P < 0.001). There was no significant difference between the initial and final hardness values in the GSE and GSE + SDF groups (p = 0.92, p = 0.07). The H1-H0 in the SDF group was significantly higher than the other groups (P<0.05). Moreover, elastic modulus of the experimental groups except GSE+SDF group was significantly higher than control. The highest mean elastic modulus was detected in the SDF group (P<0.001). The use of SDF and GSE prior to the acid challenge improved mechanical properties. Microstructural investigation, using scanning electron microscope showed dentin structure protection against acid challenges with SDF treatment and collagen matrix stabilization with GSE treatment. However combined use of these agents was not beneficious.
Collapse
Affiliation(s)
- Maryam Firouzmandi
- Oral and Dental Disease Research Center, Department of Operative Dentistry, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Fateme Vasei
- Department of Operative Dentistry, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
- * E-mail:
| | - Rashin Giti
- Department of Prosthodontics, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Hadis Sadeghi
- Student Research Committee, School of Dentistry, Shiraz University of Medical Science, Shiraz, Iran
| |
Collapse
|
14
|
Choi YJ, Bae MK, Kim YI, Park JK, Son SA. Effects of microsurface structure of bioactive nanoparticles on dentinal tubules as a dentin desensitizer. PLoS One 2020; 15:e0237726. [PMID: 32813737 PMCID: PMC7437925 DOI: 10.1371/journal.pone.0237726] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Accepted: 08/01/2020] [Indexed: 11/25/2022] Open
Abstract
In this in vitro study, spherical mesoporous bioactive glass nanoparticle (MBGN) and non-porous bioactive glass nanoparticle (BGN) were fabricated. The impact of mesopores on dentinal tubule occlusion and bioactivity was compared to examine the potential of these materials in alleviating dentine hypersensitivity (DH). MBGN, dense BGN were synthesized by sol-gel methods and characterized. Bioactivity and ion dissolution ability were analyzed. Twenty-four simulated sensitive dentin discs were prepared and randomly divided into three groups (n = 8 each); Group 1, no treatment; Group 2, Dense BGN; Group 3, MBGN. Then, four discs per group were treated with 6wt.% citric acid challenge to determine the acidic resistance. The effects on dentinal tubule occlusion were observed by FESEM. The microtensile bond strength (MTBS) was also measured. Cytotoxicity was examined using the MTT assay. According to the results, dense BGN without mesopore and MBGN with mesopore were successfully fabricated. Dense BGN and MBGN occluded the dentinal tubule before and after acid challenge. However, only MBGN formed a membrane-like layer and showed hydroxyapatite formation after soaking SBF solution. There were no significant differences in MTBS among dense BGN, MBGN (P>0.05). The cell viability was above 72% of both materials. The higher bioactivity of MBGN compared with that of dense BGN arises from the structural difference and it is anticipated to facilitate dentin remineralization by inducing hydroxyapatite deposition within the dentinal tubule.
Collapse
Affiliation(s)
- Yang-Jung Choi
- Department of Conservative Dentistry, School of Dentistry, Pusan National University, Dental Research Institute, Yangsan, Gyeongsangnam-do, Korea
| | - Moon-Kyoung Bae
- Department of Oral Physiology, School of Dentistry, Pusan National University, Yangsan, Gyeongsangnam-do, Korea
| | - Yong-Il Kim
- Department of Orthodontics, Dental Research Institute, Pusan National University Dental Hospital, Yangsan, Gyeongsangnam-do, Korea
| | - Jeong-Kil Park
- Department of Conservative Dentistry, School of Dentistry, Pusan National University, Dental Research Institute, Yangsan, Gyeongsangnam-do, Korea
| | - Sung-Ae Son
- Department of Conservative Dentistry, School of Dentistry, Pusan National University, Dental Research Institute, Yangsan, Gyeongsangnam-do, Korea
- * E-mail:
| |
Collapse
|
15
|
Bassi JC, Tedesco TK, Raggio DP, Santos AMA, Bianchi RM, de Sant'Anna GR. Is it necessary to pre-treat Dentine before GIC Restorations? Evidence from an in Vitro Study. Acta Odontol Latinoam 2020; 33:27-32. [PMID: 32621596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 12/01/2019] [Accepted: 03/01/2020] [Indexed: 06/11/2023]
Abstract
The aim of this study was to assess the influence of different pre-treatment approaches on glass ionomer cement (GIC) bond strength (BS) to dentine. Sixty bovine incisors were allocated into six groups according to substrate - sound or caries-affected dentine; and substrate pre-treatment approach - no conditioning (control), polyacrylic acid for 10 s and phosphoric acid for 7 s. Teeth in the caries-affected dentine group were previously submitted to cariogenic pH-cycling challenge. After dentine pre-treatment, according to experimental groups, polyethylene tubes were placed on flat dentine surfaces and filled with GIC. Teeth were stored in distilled water for 24 h at 37 °C and then submitted to microshear test (0.5 mm/min). Failure pattern analysis was performed under stereomicroscope (400x). Data were analysed using two-way ANOVA and Tukey's test (α=5%). Statistically significant differences were found for the pre-treatment approach, regardless of substrate (p<0.001). The polyacrylic acid group and control group had similar BS values, and were both better than the phosphoric acid group. In general, GIC had better bonding performance in sound dentine than in caries-affected dentine. In conclusion, dentine pre-treatment with polyacrylic acid did not improve the performance of GIC restoration on clinically relevant substrates.
Collapse
Affiliation(s)
- Julio C Bassi
- Universidade Santa Cecília, Faculdade de Odontologia, Disciplina de Odontopediatria, Santos, Brazil
| | - Tamara K Tedesco
- Universidade Ibirapuera, Faculdade de Odontologia, Programa de Pós-graduação em Odontologia, São Paulo, Brazil.
| | - Daniela P Raggio
- Universidade de São Paulo, Faculdade de Odontologia, Departamento de Ortodontia e Odontopediatria, São Paulo, Brazi
| | - Ana Maria A Santos
- Universidade Santa Cecília, Faculdade de Odontologia, Disciplina de Dentística, Santos, Brazil
| | - Renata Md Bianchi
- Universidade Santa Cecília, Faculdade de Odontologia, Disciplina de Odontopediatria, Santos, Brazil
- Universidade Ibirapuera, Faculdade de Odontologia, Programa de Pós-graduação em Odontologia, São Paulo, Brazil
| | - Giselle R de Sant'Anna
- Centro de Pesquisas Odontológicas São Leopoldo Mandic, Faculdade São Leopoldo Mandic, Programa de Pós-graduação em Odontopediatria, Campinas, Brazil
| |
Collapse
|
16
|
Khan AS, Farooq I, Alakrawi KM, Khalid H, Saadi OW, Hakeem AS. Dentin Tubule Occlusion Potential of Novel Dentifrices Having Fluoride Containing Bioactive Glass and Zinc Oxide Nanoparticles. Med Princ Pract 2020; 29:338-346. [PMID: 31698358 PMCID: PMC7445664 DOI: 10.1159/000503706] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2019] [Accepted: 10/28/2019] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVE To compare the in vitro potential of dentin tubule occlusion of two novel experimental dentifrices consisting of fluoride containing bioactive glass (BG) with zinc oxide nanoparticles. MATERIALS AND METHODS Forty-eight dentin discs (n = 48) were divided into 6 groups (n = 8), based on their brushing dentifrices: Group 1 = artificial saliva (AS; control); Group 2 = fluoride dentifrice (Colgate Palmolive©, UK); Group 3 = experimental nonactive agent dentifrice; Group 4 = experimental dentifrice with 1.5% BG; Group 5 = experimental dentifrice with 4% BG; and Group 6 = BioMinF© dentifrice. Postbrushing, the discs were subjected to acidic challenge with 6% wt citric acid (pH = 4.0) for 1 min. Scanning electron microscope (SEM) and energy-dispersive X-ray (EDX) spectroscopy were performed pre- and post-citric acid challenges, and percentages of tubule occlusion assessed. RESULTS SEM micrographs of group 1 (AS) show no tubule occlusion (0%), whereas those of groups 2 and 3 show partial tubule occlusion (25 to <50% of tubules occluded). The SEM micrographs of dentifrices containing fluoride-BG (groups 4, 5, and 6) show that most of the tubules (>50 and <100%) were occluded. For all the groups (excluding group 1), pre- and post-citric acid challenge values are statistically significant (p < 0.05). EDX analysis reveals the presence of zinc in experimental dentifrices only. CONCLUSION The results of novel experimental dentifrices are comparable to those of the BioMinF©, in terms of tubule occlusion. Dentifrices containing BG could serve as an alternative in dentin sensitivity management.
Collapse
Affiliation(s)
- Abdul Samad Khan
- Department of Restorative Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
| | - Imran Farooq
- Department of Biomedical Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia,
| | | | - Hina Khalid
- Interdisciplinary Research Centre in Biomedical Materials, COMSATS University Islamabad, Lahore Campus, Lahore, Pakistan
| | - Omar Waqas Saadi
- Department of Mechanical Engineering, Khalifa University, Abu Dhabi, United Arab Emirates
| | - Abbas Saeed Hakeem
- Center of Excellence in Nanotechnology, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia
| |
Collapse
|
17
|
Li C, Lu D, Deng J, Zhang X, Yang P. Amyloid-Like Rapid Surface Modification for Antifouling and In-Depth Remineralization of Dentine Tubules to Treat Dental Hypersensitivity. Adv Mater 2019; 31:e1903973. [PMID: 31559667 DOI: 10.1002/adma.201903973] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2019] [Revised: 08/01/2019] [Indexed: 06/10/2023]
Abstract
Exposure of dentinal tubules (DTs) leads to the transmission of external stimuli within the DTs, causing dental hypersensitivity (DH). To treat DH, various desensitizers have been developed for occluding DTs. However, most desensitizers commercially available or in development are only able to seal the orifices, rather than the deep regions of the DTs, thus lacking long-term stability. Herein, it is shown that the fast amyloid-like aggregation of lysozyme (lyso) conjugated with poly(ethylene glycol) (PEG) (lyso-PEG) can afford a robust ultrathin nanofilm on the deep walls of DTs through a rapid one-step aqueous coating process (in 2 min). The resultant nanofilm provides a highly effective antifouling platform for resisting the attachment of oral bacteria such as Streptococcus mutans and induces remineralization in the DTs to seal both the orifices and depths of the DTs by forming hydroxyapatite (HAp) minerals in situ. Both in vitro and in vivo animal experiments prove that the nanofilm-coated DTs are occluded with a depth of over 60 ± 5 µ m, which is at least 6 times deeper than that reported in the literature. This approach thus demonstrates the concept that an amyloid-like proteinaceous nanofilm can offer an inexpensive, rapid, and efficient therapy for treating DH with long-term effect.
Collapse
Affiliation(s)
- Chen Li
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Danyang Lu
- School and Hospital of Stomatology, Tianjin Medical University, 12 Observatory Road, Tianjin, 30070, China
| | - Jingjing Deng
- School and Hospital of Stomatology, Tianjin Medical University, 12 Observatory Road, Tianjin, 30070, China
| | - Xu Zhang
- School and Hospital of Stomatology, Tianjin Medical University, 12 Observatory Road, Tianjin, 30070, China
| | - Peng Yang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China
| |
Collapse
|
18
|
Luque-Martinez IV, Muñoz MA, Hass V, Sutil E, Reis A, Loguercio AD. EDTA Conditioning Increases the Long-term Microtensile Bond Strength to Sclerotic Dentin Mediated by Self-etch Adhesives. J Adhes Dent 2019; 20:397-403. [PMID: 30417895 DOI: 10.3290/j.jad.a41358] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
PURPOSE To evaluate the immediate and 12-month microtensile bond strength (μTBS) of two self-etch adhesives on sclerotic dentin with or without previous EDTA conditioning. The conditioning pattern and the relative area of open dentinal tubules were also evaluated. MATERIALS AND METHODS Twenty-eight bovine incisors with naturally exposed sclerotic dentin were used. For μTBS testing, 20 teeth were divided into 4 groups (n = 5) according to the combination of the main factors: 1. adhesive (Clearfil SE Bond [CSE, Kuraray] and Adper SE Plus [ADSE, 3M Oral Care]); 2. surface treatment (previous conditioning with EDTA and previous conditioning with distilled water [DW]). The sclerotic surfaces were conditioned with either 17% EDTA or DW for 2 min prior to adhesive application. Composite buildups were constructed. Specimens were sectioned to obtain composite-dentin sticks (0.8 mm2) to be tested immediately or after 12 months (distilled water at 37°C) in tensile mode (0.5 mm/min). The conditioning pattern and the relative area of open dentinal tubules (OT) were evaluated in the remaining eight teeth. After adhesive application, the surfaces were rinsed off with acetone and ethanol. Then the surface was evaluated by SEM with image software. Data from μTBS and OT were submitted to three-way repeated measures ANOVA and data from OT were submitted to one-way repeated measures ANOVA. After, for both tests, Tukey's post-hoc test was applied (α = 0.05). RESULTS For both adhesives, EDTA resulted in the highest mean immediate μTBS (p = 0.002), which remained stable after 12 months of water storage (p < 0.38). CSE showed higher μTBS when compared to ADSE (p = 0.001). Degradation of the mean μTBS was observed for both adhesives only in the DW groups. Adhesive application plus with EDTA conditioning increased the OT area in comparison with only adhesive application (p < 0.001). CONCLUSION EDTA conditioning increased the immediate microtensile bond strength in sclerotic dentin substrate and prevented degradation when associated with a self-etch adhesive.
Collapse
|
19
|
Hara AT, Turssi CP. Baking soda as an abrasive in toothpastes: Mechanism of action and safety and effectiveness considerations. J Am Dent Assoc 2019; 148:S27-S33. [PMID: 29056187 DOI: 10.1016/j.adaj.2017.09.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Revised: 09/05/2017] [Accepted: 09/06/2017] [Indexed: 11/17/2022]
Abstract
BACKGROUND Toothpastes can be formulated with different abrasive systems, depending on their intended clinical application. This formulation potentially affects their effectiveness and safety and, therefore, requires proper understanding. In this article, the authors focused on abrasive aspects of toothpastes containing sodium bicarbonate (baking soda), which have gained considerable attention because of their low abrasivity and good compatibility, while providing clinical effectiveness (further detailed in the other articles of this special issue). The authors first appraised the role of toothpaste abrasivity on tooth wear, exploring some underlying processes and the existing methods to determine toothpaste abrasivity. TYPES OF STUDIES REVIEWED The authors reviewed the available data on the abrasivity of toothpastes containing baking soda and reported a summary of findings highlighting the clinical implications. CONCLUSIONS On the basis of the collected evidence, baking soda has an intrinsic low-abrasive nature because of its comparatively lower hardness in relation to enamel and dentin. Baking soda toothpastes also may contain other ingredients, which can increase their stain removal effectiveness and, consequently, abrasivity. PRACTICAL IMPLICATIONS Even those formulations have abrasivity well within the safety limit regulatory agencies have established and, therefore, can be considered safe.
Collapse
|
20
|
Choi AN, Jang IS, Son SA, Jung KH, Park JK. Effect of erosive and abrasive stress on sealing ability of different desensitizers: In-vitro study. PLoS One 2019; 14:e0220823. [PMID: 31369650 PMCID: PMC6675100 DOI: 10.1371/journal.pone.0220823] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Accepted: 07/23/2019] [Indexed: 11/30/2022] Open
Abstract
This in vitro study examined the sealing ability of different desensitizing agents under a chemo-mechanical stress condition. For the study, a total of 144 extracted, caries-free human third molars were used to produce 1 mm-thick dentin discs. The specimens were divided randomly into four groups: Superseal (SS), Gluma (GL), Gluma Self-etch (GS), and Tooth Coat (TC). For each group, the permeability was measured before and after applying the desensitizer, after being exposed to Coca Cola for 5 minutes, and after 3150 strokes of a brushing abrasion. The decrease in permeability after the erosive and abrasive stress was analyzed by ANOVA and Tukey post hoc test. As a result, the dentin permeability decreased significantly for all desensitizers immediately after application (p < 0.05). SS and GS showed a significant difference in permeability reduction observed immediately after application and after acid action with Coca Cola (p < 0.05). After brushing abrasion, the permeability reduction decreased significantly for all desensitizers tested in this study (p < 0.05). TC showed the largest decrease in dentinal permeability compared to that of the other desensitizers and the differences were significant after brushing abrasion (p < 0.05). All tested desensitizers were effective in reducing dentin permeability. The behavioral characteristics under erosive and abrasive stress varied according to the products used. TC exhibited excellent sealing ability among the other desensitizers.
Collapse
Affiliation(s)
- An-Na Choi
- Department of Conservative Dentistry, School of Dentistry, Pusan National University, Dental Research Institute, Yangsan, Korea
| | - Il-Seok Jang
- Department of Microbiology, School of Natural Sciences, Pusan National University, Busan, Korea
| | - Sung-Ae Son
- Department of Conservative Dentistry, School of Dentistry, Pusan National University, Dental Research Institute, Yangsan, Korea
| | - Kyoung-Hwa Jung
- Department of Conservative Dentistry, School of Dentistry, Pusan National University, Dental Research Institute, Yangsan, Korea
| | - Jeong-Kil Park
- Department of Conservative Dentistry, School of Dentistry, Pusan National University, Dental Research Institute, Yangsan, Korea
- * E-mail:
| |
Collapse
|
21
|
Wu L, Geng K, Gao Q. Effects of different anti-caries agents on microhardness and superficial microstructure of irradiated permanent dentin: an in vitro study. BMC Oral Health 2019; 19:113. [PMID: 31200708 PMCID: PMC6570839 DOI: 10.1186/s12903-019-0815-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Accepted: 06/04/2019] [Indexed: 11/11/2022] Open
Abstract
BACKGROUND To compare different anti-caries agents on microhardness and micromorphology of irradiated permanent dentin in vitro, and try to find the most effective agent to prevent radiation-dentin-destruction. METHODS A total of 120 dentin samples were prepared from 60 human teeth and randomly divided into 8 groups (n = 15), [ (1)] blank control [2]; irradiation control [3]; irradiation+ fluoride [4]; irradiation+ casein phosphate polypeptide-amorphous calcium phosphate (CPP-ACP) [5]; irradiation+ CPP-ACP+ fluoride [6]; irradiation+ infiltration resin [7]; irradiation+ infiltration resin+ fluoride [8]; irradiation+ infiltration resin+ CPP-ACP. Seven samples of each groups were chosen randomly for microhardness test and eight for scanning electron microscope observation. RESULTS A decrease of microhardness (P < 0.05) and an obvious morphological change were presented on dentin surface after radiotherapy. After applications of anti-caries agents, the morphological destructions were effectively restored. The infiltration resin plus fluoride group (56.00 ± 4.02 Kg/mm2), infiltration resin plus CPP-ACP group (56.05 ± 3.69 Kg/mm2), infiltration resin group (54.70 ± 4.42Kg/mm2) and CPP-ACP plus fluoride group (53.84 ± 6.23Kg/mm2) had the highest dentin microhardness value after radiotherapy, and no statistically significant difference were found between them. CONCLUSIONS Infiltration resin, CPP-ACP, fluoride and their pairwise combination can effectively prevent radiation-dentin-destruction. Among them, infiltration resin with CPP-ACP, infiltration resin with fluoride, CPP-ACP with fluoride, and infiltration resin have the most protective effects on irradiation-dentin-destructions.
Collapse
Affiliation(s)
- LiLing Wu
- Center of Stomatology, Xiangya Hospital Central South University, Changsha, 410008 Hunan Province China
- Department of Stomatology, ZhongShan Hospital Xiamen University, Xiamen, 361004 China
| | - Kun Geng
- Center of Stomatology, Xiangya Hospital Central South University, Changsha, 410008 Hunan Province China
| | - QingPing Gao
- Center of Stomatology, Xiangya Hospital Central South University, Changsha, 410008 Hunan Province China
| |
Collapse
|
22
|
Silva AC, Melo P, Ferreira J, Oliveira S, Gutknecht N. Influence of grape seed extract in adhesion on dentin surfaces conditioned with Er,Cr:YSGG laser. Lasers Med Sci 2019; 34:1493-1501. [PMID: 30830558 DOI: 10.1007/s10103-019-02749-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Accepted: 02/12/2019] [Indexed: 11/26/2022]
Abstract
The proanthocyanidin (PA)-rich grape seed extract (GSE) is a collagen cross-linking agent that can perform a chemical bond with the dentin's collagen. The objective of this study was to evaluate the influence on shear bond strength (SBS) of the pre-conditioning of GSE, on human dentin surfaces conditioned with Er,Cr:YSGG laser. The sample consisted of 64 non-carious human teeth, divided into eight groups, four groups conditioned with Er,Cr:YSGG laser (4.5 W, 50 Hz, 50 μs, 70% air, 90% water) and four prepared with conventional methods (control). In both groups, a GSE solution was applied before using the two adhesives tested: Clearfil™ SE Bond (CSE) and Scotchbond™ Universal (SU). Subsequently, a SBS test, a scanning electron microscopy, and a statistical analysis were performed. In the laser groups, the best SBS mean (20.08 ± 4.01 MPa) was achieved in the group treated with GSE and CSE. The control group with the application of CSE showed the highest SBS mean (24.27 ± 10.28 MPa), and the group treated with laser and SU showed the lowest SBS mean (12.94 ± 6.51 MPa). Between these two groups there was a statistically significant difference (p = 0.05). However, this was not observed among the laser or control groups. The type of dentin surface preparation can influence the SBS. The CSE showed better SBS in laser and control groups. The presence of GSE did not improve the adhesion on surfaces conditioned with laser, but more studies should be carried out in the future to confirm this conclusion.
Collapse
Affiliation(s)
- Ana C Silva
- Department of Operative Dentistry, Faculdade de Medicina Dentária da Universidade do Porto, Rua Dr. Manuel Pereira da Silva, 4200-393, Porto, Portugal.
| | - Paulo Melo
- Department of Operative Dentistry, Faculdade de Medicina Dentária da Universidade do Porto, Rua Dr. Manuel Pereira da Silva, 4200-393, Porto, Portugal
| | - João Ferreira
- Department of Operative Dentistry, Faculdade de Medicina Dentária da Universidade do Porto, Rua Dr. Manuel Pereira da Silva, 4200-393, Porto, Portugal
| | - Sofia Oliveira
- Department of Dental Biomaterials, Faculdade de Medicina Dentária da Universidade de Lisboa, Rua Professora Teresa Ambrósio, Cidade Universitária, 1600-277, Lisbon, Portugal
| | - Norbert Gutknecht
- Department of Operative Dentistry, University Hospital RWTH Aachen, Pauwelsstraße 30, 52074, Aachen, Germany
| |
Collapse
|
23
|
Zander V, Chan D, Sadr A. Microcomputed Tomography Evaluation of Root Dentin Caries Prevention by Topical Fluorides and Potassium Iodide. Sensors (Basel) 2019; 19:E874. [PMID: 30791530 PMCID: PMC6412410 DOI: 10.3390/s19040874] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 02/16/2019] [Accepted: 02/16/2019] [Indexed: 11/17/2022]
Abstract
The mineral content of dental hard tissues has traditionally been measured by destructive tests such as transverse microradiography. Microfocus X-ray computed tomography (micro CT) has enabled non-destructive 3D assessment of tooth demineralization. This study compared the preventive effects of silver diammine fluoride (SDF) and potassium iodide (KI) in comparison with fluoride varnish. SDF has been known to arrest caries but darkens the tooth. KI creates a precipitate with SDF that reduces the discoloration, but its effects on SDF efficacy in terms of preventing demineralization of at-risk root dentin surfaces is unknown. Bovine root dentin blocks were randomly distributed into four groups and subjected to a pretreatment in each group (n = 8); Control: deionized water (DIW); F-Varnish: 5% sodium fluoride varnish: 38% Saforide; SDF+KI: SDF followed by saturated solution of KI in DIW. The treated dentin was subjected to 8 cycles of demineralization (pH 5) for 14 h and remineralization in artificial saliva (pH 7) for 10 h. Specimens were then scanned for 12 min using micro CT at 73 KV and 1012 µA with 8.3 μm resolution. The 3D images were analyzed in Amira software to calculate lesion depth (LD), surface layer mineral density (SL) and mineral loss (ΔZ) for each specimen. One-way ANOVA with Bonferroni posthoc showed that there was a statistically significant difference between Control and all three other groups for all parameters (P < 0.001), however, there was no statistical difference among F-Varnish, SDF and SDF+KI (P > 0.05). Single application of F-Varnish, SDF and SDF+KI showed comparable preventive effects against root dentin demineralization. Application of KI did not affect anti-demineralization properties of SDF in this study. Micro CT is a quick and effective method for objective and high-resolution characterization of dentin caries lesions.
Collapse
Affiliation(s)
- Vernon Zander
- Department of Restorative Dentistry, University of Washington, Seattle, WA 98195, USA.
| | - Daniel Chan
- Department of Restorative Dentistry, University of Washington, Seattle, WA 98195, USA.
| | - Alireza Sadr
- Department of Restorative Dentistry, University of Washington, Seattle, WA 98195, USA.
| |
Collapse
|
24
|
Terenzi M, Botan TG, Lopes de Oliveira GJP, Zandim-Barcelos DL, Sampaio JEC. Effectiveness of Clinpro XT in Reducing Dentin Permeability and its Resistance to Acid Challenges. Oral Health Prev Dent 2019; 16:339-344. [PMID: 30175331 DOI: 10.3290/j.ohpd.a40956] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
PURPOSE To evaluate the efficacy of Clinpro XT in reducing dentin permeability and the stability of this effect after different acid challenges. MATERIALS AND METHODS Sixty-five roots of extracted human third molars were used. From each tooth, one dentin specimen was prepared and connected to a fluid filtration system to measure the dentin permeability after each of the following steps: sample preparation; treatment with 37% phosphoric acid; application of Clinpro XT; three acid challenges. Specimens were randomly assigned to 5 groups (n = 13) according to the acidic solution applied: Coca-Cola, natural lemon juice, wine vinegar, white wine and Red Bull energy drink. An additional 10 third molars were used to evaluate the degree of occlusion of the dentinal tubules and the surface roughness. RESULTS Clinpro XT statistically significantly reduced dentin permeability after just a single application. No statistically significant increase in dentin permeability could be detected after three consecutive challenges. The application of Clinpro XT promotes the occlusion of dentinal tubules and reduces the surface roughness. CONCLUSION The Clinpro XT is effective in reducing dentin permeability. This effect persists even after acid challenges.
Collapse
|
25
|
Zanetti F, Zhao X, Pan J, Peitsch MC, Hoeng J, Ren Y. Effects of cigarette smoke and tobacco heating aerosol on color stability of dental enamel, dentin, and composite resin restorations. Quintessence Int 2019; 50:156-166. [PMID: 30564805 DOI: 10.3290/j.qi.a41601] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECTIVES To test if cigarette smoke (CS) causes discoloration of enamel, dentin, and composite resin restorations and induces color mismatch between dental hard tissues and the restorations, and to compare the findings with the effects of aerosol generated by the tobacco heating system (THS) 2.2. METHOD AND MATERIALS Twenty-two human premolars were prepared with Class V cavities restored with Filtek Supreme Ultra (3M Espe) composite resin. Teeth were divided into two groups and exposed to either CS from 20 reference cigarettes (3R4F) or aerosol from 20 THS 2.2 tobacco heat sticks 4 days a week for 3 weeks. CIE L*a*b* color was assessed before and after exposure and brushing at 1, 2, and 3 weeks. Color match, marginal discoloration, marginal integrity, and surface texture of the Class V restoration were assessed according to a modified US Public Health Service (USPHS) criterion. RESULTS Marked discoloration of enamel and dentin was observed following 3 weeks of CS exposure (ΔE = 8.8 ± 2.6 and 21.3 ± 4.4, respectively), and color mismatch occurred between the composite resin restorations (ΔE = 25.6 ± 3.8) and dental hard tissues. Discoloration was minimal in the enamel, dentin, and composite resin restorations in the THS 2.2 group, and no color mismatch was observed after 3 weeks of THS 2.2 aerosol exposure. CONCLUSION CS causes significant tooth discoloration and induces color mismatch between dental hard tissues and composite resin restorations. Reducing or eliminating the deposits derived from tobacco combustion could minimize the impact of tobacco products on tooth discoloration.
Collapse
|
26
|
Fan W, Li Y, Liu D, Sun Q, Duan M, Fan B. PLGA submicron particles containing chlorhexidine, calcium and phosphorus inhibit Enterococcus faecalis infection and improve the microhardness of dentin. J Mater Sci Mater Med 2019; 30:17. [PMID: 30671677 DOI: 10.1007/s10856-018-6216-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Accepted: 12/31/2018] [Indexed: 06/09/2023]
Abstract
Enterococcus faecalis (E. faecalis), a Gram-positive facultative anaerobe, is reported to take responsibility for a large portion of refractory root canal infections and root canal re-infections of human teeth. Chlorhexidine is a strong bactericide against E. faecalis but cannot infiltrate into dentinal tubules. On the other hand, a common negative effect of root canal medicaments is the decrease of dentin microhardness. In this study, poly(D,L-lactic-co-glycolide) (PLGA) submicron particles were applied as delivery carriers to load and release the chlorhexidine as well as calcium and phosphorus. The release profiles, antibacterial ability against E. faecalis, infiltration ability into dentinal tubules, biocompatibility and effects on dentin microhardness of these particles were investigated. Results revealed that encapsulated chemicals could be released in a sustained manner from the particles. The particles also exhibited excellent biocompatibility on MC3T3-E1 cells and significant antimicrobial property against E. faecalis. On dentin slices, the particles could be driven into dentinal tubules by ultrasonic activiation and inhibit E. faecalis colonization. Besides, dentin slices medicated with the particles displayed an increase in microhardness. In conclusion, PLGA submicron particles carrying chlorhexidine, calcium and phosphorus could be developed into a new intra-canal disinfectant for dental treatments.
Collapse
Affiliation(s)
- Wei Fan
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, People's Republic of China
| | - Yanyun Li
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, People's Republic of China
| | - Danfeng Liu
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, People's Republic of China
| | - Qing Sun
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, People's Republic of China
| | - Mengting Duan
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, People's Republic of China
| | - Bing Fan
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, People's Republic of China.
| |
Collapse
|
27
|
Giacaman RA, Jobet-Vila P, Muñoz-Sandoval C. Anticaries activity of egg ovalbumin in an experimental caries biofilm model on enamel and dentin. Clin Oral Investig 2018; 23:3509-3516. [PMID: 30543026 DOI: 10.1007/s00784-018-2769-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Accepted: 12/05/2018] [Indexed: 10/27/2022]
Abstract
OBJECTIVES Limited evidence suggests a putative inhibitory effect of dietary proteins on demineralization during the carious process. The aim was to explore a potential anticaries activity of the egg protein ovalbumin on a relevant in vitro approach. MATERIALS AND METHODS Biofilms of Streptococcus mutans UA159 were formed on saliva-coated enamel and dentin bovine slabs. Biofilms were challenged with 10% sucrose followed by either a 200 μg/mL solution of ovalbumin or 1:10, 1:100, and 1:1000 (v/v) serial dilutions of that ovalbumin solution, for the entire length of the experiment. Biofilms exposed to 10% sucrose followed only by 0.9% NaCl served as caries-positive control. Once completed the experimental phase, biofilms were analyzed for biomass, viable bacteria, and polysaccharide formation. Final surface hardness (SH) was obtained to calculate %SH loss (demineralization). Two independent experiments were conducted, in triplicate. Data were analyzed by ANOVA and a post hoc test at the 95% confidence level. RESULTS A reduction (p < 0.05) in biomass and extracellular polysaccharide formation, but not in the number of viable cells, was observed for both dental substrates. All ovalbumin concentrations tested showed lower demineralization than the positive control (p < 0.05), in a dose-dependent manner. The highest concentration showed a reduction in the %SH loss of about 30% for both enamel and dentin. CONCLUSION Egg ovalbumin presented to sucrose-challenged biofilms of Streptococcus mutans seems to reduce cariogenicity of a biofilm-caries model. CLINICAL RELEVANCE Ovalbumin may counteract the cariogenic effect of sugars. If these findings are clinically confirmed, novel preventive approaches for caries are warranted.
Collapse
Affiliation(s)
- Rodrigo A Giacaman
- Cariology Unit, Department of Oral Rehabilitation, University of Talca, 1 poniente 1141, Escuela de Odontología, Talca, Chile.
| | - Pascale Jobet-Vila
- Cariology Unit, Department of Oral Rehabilitation, University of Talca, 1 poniente 1141, Escuela de Odontología, Talca, Chile
| | - Cecilia Muñoz-Sandoval
- Cariology Unit, Department of Oral Rehabilitation, University of Talca, 1 poniente 1141, Escuela de Odontología, Talca, Chile
| |
Collapse
|
28
|
Toledano M, Osorio R, Pérez-Álvarez MC, Osorio E, Lynch CD, Toledano-Osorio M. A zinc-doped endodontic cement facilitates functional mineralization and stress dissipation at the dentin surface. Med Oral Patol Oral Cir Bucal 2018; 23:e646-e655. [PMID: 30341273 PMCID: PMC6260998 DOI: 10.4317/medoral.22751] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Accepted: 09/07/2018] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND The purpose of this study was to evaluate nanohardness and viscoelastic behavior of dentin surfaces treated with two canal sealer cements for dentin remineralization. MATERIAL AND METHODS Dentin surfaces were subjected to: i) 37% phosphoric acid (PA) or ii) 0.5 M ethylenediaminetetraacetic acid (EDTA) conditioning prior to the application of two experimental hydroxyapatite-based cements, containing sodium hydroxide (calcypatite) or zinc oxide (oxipatite), respectively. Samples were stored in simulated body fluid during 24 h or 21 d. The intertubular and peritubular dentin were evaluated using a nanoindenter to assess nanohardness (Hi). The load/displacement responses were used for the nano-dynamic mechanical analysis to estimate complex modulus (E*) and tan delta (δ). The modulus mapping was obtained by imposing a quasistatic force setpoint to which a sinusoidal force was superimposed. AFM imaging and FESEM analysis were performed. RESULTS After 21 d of storage, dentin surfaces treated with EDTA+calcypatite, PA+calcypatite and EDTA+oxipatite showed viscoelastic discrepancies between peritubular and intertubular dentin, meaning a risk for cracking and breakdown of the surface. At both 24 h and 21 d, tan δ values at intertubular dentin treated with the four treatments performed similar. At 21 d time point, intertubular dentin treated with PA+oxipatite achieved the highest complex modulus and nanohardness, i.e., highest resistance to deformation and functional mineralization, among groups. CONCLUSIONS Intertubular and peritubular dentin treated with PA+oxipatite showed similar values of tan δ after 21 d of storage. This produced a favorable dissipation of energy with minimal energy concentration, preserving the structural integrity at the dentin surface.
Collapse
Affiliation(s)
- M Toledano
- University of Granada, Faculty of Dentistry, Dental Materials Section, Colegio Máximo de Cartuja s/n, 18071 - Granada - Spain,
| | | | | | | | | | | |
Collapse
|
29
|
Strauss FJ, Stähli A, Beer L, Mitulović G, Gilmozzi V, Haspel N, Schwab G, Gruber R. Acid bone lysate activates TGFβ signalling in human oral fibroblasts. Sci Rep 2018; 8:16065. [PMID: 30375456 PMCID: PMC6207660 DOI: 10.1038/s41598-018-34418-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Accepted: 10/12/2018] [Indexed: 02/07/2023] Open
Abstract
Demineralized bone matrix is a widely used allograft from which not only the inorganic mineral but also embedded growth factors are removed by hydrochloric acid (HCl). The cellular response to the growth factors released during the preparation of demineralized bone matrix, however, has not been studied. Here we investigated the in vitro impact of acid bone lysate (ABL) prepared from porcine cortical bone chips on oral fibroblasts. Proteomic analysis of ABL revealed a large spectrum of bone-derived proteins including TGF-β1. Whole genome microarrays and RT-PCR together with the pharmacologic blocking of TGF-β receptor type I kinase with SB431542 showed that ABL activates the TGF-β target genes interleukin 11, proteoglycan 4, and NADPH oxidase 4. Interleukin 11 expression was confirmed at the protein level by ELISA. Immunofluorescence and Western blot showed the nuclear localization of Smad2/3 and increased phosphorylation of Smad3 with ABL, respectively. This effect was independent of whether ABL was prepared from mandible, calvaria or tibia. These results demonstrate that TGF-β is a major growth factor that is removed upon the preparation of demineralized bone matrix.
Collapse
Affiliation(s)
- Franz Josef Strauss
- Department of Oral Biology, Medical University of Vienna, Sensengasse 2a, 1090, Vienna, Austria
- Department of Conservative Dentistry, School of Dentistry, University of Chile, Sergio Livingstone 943, Santiago, Chile
| | - Alexandra Stähli
- Department of Oral Biology, Medical University of Vienna, Sensengasse 2a, 1090, Vienna, Austria
- Department of Periodontology, School of Dental Medicine, University of Bern, Freiburgstrasse 7, 3010, Bern, Switzerland
| | - Lucian Beer
- Department of Biomedical Imaging and Image-guided Therapy, Medical University Vienna, Währinger Gürtel 18-20, 1090, Vienna, Austria
- Christian Doppler Laboratory for Cardiac and Thoracic Diagnosis and Regeneration, Medical University Vienna, Währinger Gürtel 18-20, 1090, Vienna, Austria
| | - Goran Mitulović
- Clinical Department of Laboratory Medicine Proteomics Core Facility, Medical University Vienna, Währinger Gürtel 18-20, 1090, Vienna, Austria
| | - Valentina Gilmozzi
- Department of Oral Biology, Medical University of Vienna, Sensengasse 2a, 1090, Vienna, Austria
| | - Nina Haspel
- Department of Oral Biology, Medical University of Vienna, Sensengasse 2a, 1090, Vienna, Austria
| | - Gerhild Schwab
- Department of Oral Biology, Medical University of Vienna, Sensengasse 2a, 1090, Vienna, Austria
| | - Reinhard Gruber
- Department of Oral Biology, Medical University of Vienna, Sensengasse 2a, 1090, Vienna, Austria.
- Department of Periodontology, School of Dental Medicine, University of Bern, Freiburgstrasse 7, 3010, Bern, Switzerland.
| |
Collapse
|
30
|
Gänsbauer M, Burkovski A, Karl M, Grobecker-Karl T. Comparison of simplistic biofilm models for
evaluating irrigating solutions. Quintessence Int 2018; 48:521-526. [PMID: 28512652 DOI: 10.3290/j.qi.a38268] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Many innovations have recently been implemented in the field of endodontics, often based on a variety of in-vitro/ex-vivo test setups. It was the goal of this research to compare different biofilm models for evaluating the effectiveness of rinsing solutions. METHOD AND MATERIALS Three different models have been applied in this study, including petri dishes with nutrient medium, arrays of human dentin disks, and split bovine root segments. The susceptibility of biofilms formed by Enterococcus faecalis to commonly used endodontic irrigants was tested. RESULTS While citric acid 3% did not show an inhibitory effect on solid medium, mean maximum inhibition areolae of 9.8 ± 1.6 mm were found for sodium hypochlorite 3%. Fluorescein solution was shown to penetrate dentin tubules to a depth of 0.5 to 1 mm, indicating that the dentin tubules are not freely accessible, but clotted by E faecalis biofilms. Rinsing root canals with a combination of citric acid, hydrogen peroxide, chlorhexidine, and sodium hypochlorite removed bacterial biofilms from the dentin tubules only to a depth of 0.5 mm, while bacteria in deeper regions were not affected. CONCLUSION Standard irrigating solutions inhibit bacterial growth; however, due to the morphology of the tooth, the effect of irrigating media is restricted to the root canal and the adjacent volume of dentin tubules. Results from standardizable diffusion tests seem not to be predictive for clinical performance of irrigating solutions.
Collapse
|
31
|
Mass E, Hassan A, Zilberman U. Long-term in-vivo effect of various restorative materials on enamel and dentin of primary molars. Quintessence Int 2018; 48:633-638. [PMID: 28681046 DOI: 10.3290/j.qi.a38557] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECTIVE To explore the long-term in-vivo effect of different dental restorative materials on the surrounding enamel and dentin, in primary molars. METHOD AND MATERIALS Sixteen naturally exfoliated primary molars restored with amalgam, compomer, and glass-ionomer cement were collected after 2 to 5 years of function in the mouth. Four intact molars served as control. The teeth were sliced buccolingually and the ion content in the restorative material, the enamel, and the dentin surrounding the restoration was determined using a scanning electron microscopy-energy dispersive x-ray spectroscopy (SEM-EDS) program. RESULTS Amalgam released copper to the enamel and dentin causing a bluish discoloration. No traces of mercury or other ions were detected in the enamel or dentin. The enamel and dentin surrounding the restoration showed reduced inorganic components and increased organic components. The enamel and dentin surrounding the compomer restoration showed similar to amalgam reduction in inorganic components and increased organic components. Traces of fluoride, aluminum, and silicon were found. The enamel and dentin of teeth restored with glass-ionomer cement showed the least reduction in inorganic components, with higher fluoride content and traces of aluminum, silicon, and strontium. CONCLUSION This long-term in-vivo study showed release of copper ions from amalgam material to the enamel and dentin, but no traces of mercury. Amalgam and compomers showed no remineralization effect on the dentin surrounding the restoration. Glass-ionomer restorations showed remineralization effect on the tooth components and migration of inorganic ions from the enamel and dentin to the material.
Collapse
|
32
|
Moon CY, Nam OH, Kim M, Lee HS, Kaushik SN, Cruz Walma DA, Jun HW, Cheon K, Choi SC. Effects of the nitric oxide releasing biomimetic nanomatrix gel on pulp-dentin regeneration: Pilot study. PLoS One 2018; 13:e0205534. [PMID: 30308037 PMCID: PMC6181396 DOI: 10.1371/journal.pone.0205534] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Accepted: 09/26/2018] [Indexed: 12/26/2022] Open
Abstract
Successful disinfection alongside complete endodontic tissue regeneration and revascularization are the most desired clinical outcomes of regenerative endodontics. Despite reported clinical successes, significant limitations to the current regenerative endodontic procedure (REP) have been elucidated. To improve the current REP, an antibiotics and nitric oxide (NO) releasing biomimetic nanomatrix gel was developed. The study evaluates antibacterial effects of an antibiotics and NO releasing biomimetic nanomatrix gel on multispecies endodontic bacteria. Antibiotics, ciprofloxacin (CF) and metronidazole (MN) were mixed and encapsulated within the NO releasing biomimetic nanomatrix gel. The gel was synthesized and self-assembled from peptide amphiphiles containing various functional groups. Antibacterial effects of the antibiotics and NO releasing biomimetic nanomatrix gel were evaluated using bacterial viability assays involving endodontic microorganisms including clinical samples. Pulp-dentin regeneration was evaluated via animal-model experiments. The antibiotics and NO releasing biomimetic nanomatrix gel demonstrated a concentration dependent antibacterial effect. In addition, NO alone demonstrated a concentration dependent antibacterial effect on endodontic microorganism. An in vivo analysis demonstrated the antibiotics and NO releasing biomimetic nanomatrix gel promoted tooth revascularization with maturation of root canals. An optimal concentration of and NO releasing nanomatrix gel is suggested for its potential as a root treatment material for REP and an appropriate protocol for human trials. Further investigation is required to obtain a larger sample size and decide upon ideal growth factor incorporation.
Collapse
Affiliation(s)
- Chan-Yang Moon
- Department of Pediatric Dentistry, Kyung Hee University, Seoul, Korea
| | - Ok Hyung Nam
- Department of Pediatric Dentistry, Kyung Hee University, Seoul, Korea
| | - Misun Kim
- Department of Pediatric Dentistry, Kyung Hee University, Seoul, Korea
| | - Hyo-Seol Lee
- Department of Pediatric Dentistry, Kyung Hee University, Seoul, Korea
| | - Sagar N. Kaushik
- Department of Biomedical Engineering, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - David A. Cruz Walma
- Department of Pediatric Dentistry, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Ho-Wook Jun
- Department of Biomedical Engineering, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Kyounga Cheon
- Department of Pediatric Dentistry, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
- * E-mail: (SCC); (KC)
| | - Sung Chul Choi
- Department of Pediatric Dentistry, Kyung Hee University, Seoul, Korea
- * E-mail: (SCC); (KC)
| |
Collapse
|
33
|
Yu OY, Zhao IS, Mei ML, Lo ECM, Chu CH. Caries-arresting effects of silver diamine fluoride and sodium fluoride on dentine caries lesions. J Dent 2018; 78:65-71. [PMID: 30114443 DOI: 10.1016/j.jdent.2018.08.007] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Revised: 08/06/2018] [Accepted: 08/10/2018] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVES To investigate the remineralising effect and bacterial growth inhibition of 38% silver diamine fluoride (SDF) solution and 5% sodium fluoride (NaF) varnish on artificial dentine caries lesions. METHODS Demineralised dentine blocks were treated with SDF + NaF (Group 1), SDF (Group 2), NaF (Group 3) and water (Group 4) and subjected to a Streptococcus mutans biofilm challenge. Lesion depth, precipitates' characteristics and matrix (collagen)-to-mineral ratio were evaluated by micro-computer tomography (micro-CT), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR), respectively. The biofilm kinetics, viability and topography were assessed by counts of colony forming units (CFUs), confocal laser scanning microscopy (CLSM) and scanning electron microscopy (SEM), respectively. Data were analysed by two-way ANOVA test. RESULTS The lesion depths of Groups 1-4 were 170 ± 28 μm, 160 ± 32 μm, 353 ± 38 μm and 449 ± 24 μm, respectively. The addition of NaF to SDF did not show better remineralisation than SDF (p = 0.491). Metallic silver and silver chloride were found in Groups 1 and 2. The amide I-to-hydrogen phosphate ratios of the four groups were 0.14 ± 0.02, 0.14 ± 0.01, 0.29 ± 0.05 and 0.49 ± 0.16, respectively, and the addition of NaF to SDF did not offer better protection against collagen exposure than SDF (p = 0.986). The Log10 CFUs of Groups 1-4 were 5.75 ± 0.56, 4.49 ± 0.57, 6.55 ± 0.39 and 6.40 ± 0.38, respectively. The presence of NaF reduced the antibacterial effect of SDF (p < 0.001). The SEM and CLSM images supported the findings. CONCLUSION Application of SDF with or without NaF reduced the demineralisation of dentine caries, but SDF exerted stronger inhibition of biofilm growth than SDF with NaF. CLINICAL SIGNIFICANCE NaF varnish affects the antibacterialeffects of SDF, the adjunctive application of SDF solution and NaF varnish is not recommended to arrest dentine caries in clinic.
Collapse
Affiliation(s)
- Ollie Y Yu
- Faculty of Dentistry, The University of Hong Kong, Hong Kong
| | - Irene S Zhao
- Faculty of Dentistry, The University of Hong Kong, Hong Kong
| | - May L Mei
- Faculty of Dentistry, The University of Hong Kong, Hong Kong
| | - Edward C M Lo
- Faculty of Dentistry, The University of Hong Kong, Hong Kong
| | - C H Chu
- Faculty of Dentistry, The University of Hong Kong, Hong Kong.
| |
Collapse
|
34
|
Abstract
Recent studies suggested that bleaching agents may whiten teeth by oxidizing the fluorescent materials, which are the proteins located in the organic-inorganic interface. Therefore, we postulated that fluorescence of dentin came from dentin phosphoprotein (DPP) and that bleaching agents might bleach dentin by oxidizing DPP. Fifty-six specimens were randomly divided into 4 groups and exposed to distilled water, hydrogen peroxide (HP), ethylenediamine tetraacetic acid disodium salt (EDTA), and acetic acid for 24 h. After measuring the organic and inorganic components, fluorescence, and color characteristics of dentin before and after exposure, we found that when DPP was removed from dentin by EDTA, fluorescent intensity declined proportionally with the reduction in Raman relative intensity, and dentin was whitened considerably, with an Δ E value 6 times higher than that of the distilled water group. On the contrary, due to the incapability of acetic acid to dissolve DPP during decalcification, fluorescent intensity values and tooth color remained nearly unchanged after exposure to acetic acid. Dentin exposed to neutral HP showed no obvious morphologic and organic/inorganic component changes except for the destruction of DPP. Similarly, dramatically decreased fluorescent intensity and lightened color were found in the HP group. Moreover, DPP solution of the HP group exhibited decreased ultraviolet absorbance, especially between 250 and 300 nm, which arose from aromatic amino acids. The results indicated that DPP was responsible for the fluorescent properties of dentin and that HP might bleach dentin by the oxidization of aromatic amino acids in DPP. These findings are of great significance in promoting our further understanding of the mechanism of tooth bleaching and the fluorescent property of normal dentin.
Collapse
Affiliation(s)
- T Jiang
- 1 The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, China
- 2 Department of Prosthodontics, Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Y R Guo
- 1 The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | - X W Feng
- 1 The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Y Sa
- 1 The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, China
- 2 Department of Prosthodontics, Hospital of Stomatology, Wuhan University, Wuhan, China
| | - X Yang
- 3 Department of Oral Biology, School of Dental Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - M Wang
- 1 The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | - P Li
- 1 The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Y N Wang
- 1 The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, China
- 3 Department of Oral Biology, School of Dental Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| |
Collapse
|
35
|
Kurt S, Kırtıloğlu T, Yılmaz NA, Ertaş E, Oruçoğlu H. Evaluation of the effects of Er:YAG laser, Nd:YAG laser, and two different desensitizers on dentin permeability: in vitro study. Lasers Med Sci 2018; 33:1883-1890. [PMID: 29850962 DOI: 10.1007/s10103-018-2546-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2017] [Accepted: 05/18/2018] [Indexed: 11/25/2022]
Abstract
The purpose of this in vitro study was to evaluate and compare the efficacy of erbium-doped yttrium aluminum garnet (Er:YAG) laser, neodymium-doped yttrium aluminum garnet (Nd:YAG) laser, PrevDent nano-hydroxyapatite toothpaste plus Repairing Serum Kit (PNH), and NUPRO Sensodyne Prophylaxis Paste with NovaMin (NPP) on dentin permeability reduction. Forty dentin discs obtained from bovine incisors were divided into four study groups: Er:YAG laser-treated (2940 nm; 0.2 W, 80 mJ/pulse, 3 Hz); Nd:YAG laser-treated (1064 nm; 1 W, 10 Hz); PNH-treated; and NPP-treated groups. The quantitative changes in permeability of each dentin disc were measured using a computerized fluid filtration method (CFFM) before and after desensitizer treatments. The data were analyzed using the Wilcoxon, paired-samples t, Kruskal-Wallis, and Mann-Whitney U tests. The dentin surfaces and tubules were also morphologically detected by scanning electron microscopy (SEM). In all groups, dentin permeability was significantly reduced after the desensitizer and laser treatments (p < 0.05). Among the groups, we detected a significant difference in only when comparing the Er:YAG laser- and NPP-treated groups (p = 0.034). SEM analysis revealed physical changes in the dentin surface in all groups. This in vitro study shows that all tested desensitizers and laser treatments reduced dentin permeability. Also, surface changes, such as complete or partial occlusion or shrinkage of dentin tubules, were observed in all groups. Although the laser groups performed best, the PNH protocol can be considered as an alternative therapeutic product. In addition, clinical and laboratory studies should be performed for this product, and their efficacy should be assessed by combined therapy with lasers.
Collapse
Affiliation(s)
- Sevda Kurt
- Department of Periodontology, Faculty of Dentistry, Recep Tayyip Erdogan University, Rize, Turkey.
| | - Tuğrul Kırtıloğlu
- Department of Periodontology, Faculty of Dentistry, Ondokuz Mayis University, Samsun, Turkey
| | - Nasibe Aycan Yılmaz
- Department of Restorative Dentistry, Faculty of Dentistry, Adnan Menderes University, Aydın, Turkey
| | - Ertan Ertaş
- Department of Restorative Dentistry, Faculty of Dentistry, Ondokuz Mayis University, Samsun, Turkey
| | - Hasan Oruçoğlu
- Department of Endodontics, Faculty of Dentistry, Abant Izzet Baysal University, Bolu, Turkey
| |
Collapse
|
36
|
Delgado AJ, Dias Ribeiro AP, Quesada A, Rodríguez LE, Hernández R, Wynkoop B, Dilbone DA. Potential erosive effect of mouthrinses on enamel and dentin. Gen Dent 2018; 66:75-79. [PMID: 29714705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
This in vitro study measured the pH values, titratable acidity (TA), and erosive potential of commercially available mouthrinses. A pH analysis of 6 mouthrinses (Listerine Total Care, Listerine Ultraclean, Listerine Original, Crest Pro-Health, Scope Classic, and ACT Total Care) was performed using a calibrated pH meter, and the neutralizable acidity was measured by titrating the mouthwashes against 0.1 M of sodium hydroxide. A gravimetric analysis was performed by submerging human enamel and dentin specimens in 5 mL of each mouthrinse for a total of 2 weeks. Specimens were weighed on a calibrated analytical balance at baseline, 24 hours, 48 hours, 96 hours, 1 week, and 2 weeks, and finally the loss of mass was calculated. The differences in erosive potential among the 6 mouthrinses were verified using nonparametric tests (Kruskal-Wallis and Mann- Whitney). The level of significance was set at 0.05. The mouthrinses were found to have the following mean pH/ TA values: Crest Pro-Health, 7.05/0.00; ACT Total Care, 6.31/5.44; Scope Classic, 5.18/0.42; Listerine Original, 3.98/9.26; Listerine Total Care, 3.43/5.88; and Listerine Ultraclean, 3.87/10.36. A significant correlation between pH and TA was observed for this dataset (P > 0.0001). No statistically significant difference in enamel loss among the groups was observed (P = 0.0631). However, a significant difference in dentin loss was observed among the 6 mouthrinses (P = 0.0011). Within the limitations of this in vitro study, it can be concluded that some mouthrinses have a pH lower than the critical pH of enamel and dentin. There is a significant association between acidic pH values and higher TA. Some of the tested mouthrinses presented an erosive potential on dentin.
Collapse
|
37
|
Sayed M, Matsui N, Hiraishi N, Nikaido T, Burrow MF, Tagami J. Effect of Glutathione Bio-Molecule on Tooth Discoloration Associated with Silver Diammine Fluoride. Int J Mol Sci 2018; 19:ijms19051322. [PMID: 29710829 PMCID: PMC5983840 DOI: 10.3390/ijms19051322] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Revised: 04/24/2018] [Accepted: 04/26/2018] [Indexed: 11/24/2022] Open
Abstract
This study evaluated the effect of Glutathione (GSH) bio-molecule on the reduction of enamel and dentin discoloration after application of 38% silver diammine fluoride solution (SDF). One hundred and twenty bovine teeth specimens were used. The enamel and dentin specimens were divided into three groups: (1) SDF only (control); (2) SDF followed by application of a potassium iodide solution (KI); and (3) SDF mixed with 20% GSH. Half the specimens were exposed to light and the remainder kept in dark conditions (n = 10) Color changes were measured using a spectrophotometer at the following time intervals: before solution application (baseline) and immediately after application, then 3, 6, 24, 48, 72 h, and 7, 10 and 14 days. SEM/EDS analysis was performed on treated enamel and dentin. Statistical analysis was done using a repeated measures ANOVA test. The spectrophotometer results showed that the SDF group exhibited the greatest color changes under both light exposed and dark conditions, while SDF + GSH group was effective in decreasing the color changes in both light and dark conditions. The SDF + KI group showed an insignificant color changes over time. SEM/EDS analysis showed different patterns for the silver crystal formation in each group (SDF, SDF + GSH, and SDF + KI group). It was concluded GSH can effectively minimize color changes after application of SDF, especially on enamel and to a lesser extent on dentin.
Collapse
Affiliation(s)
- Mahmoud Sayed
- Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 113-8510 Tokyo, Japan.
| | - Naoko Matsui
- Cariology and Operative Dentistry, Oral Restitution Department, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, 113-8549 Tokyo, Japan.
| | - Noriko Hiraishi
- Research Fellow of Japan Society for the Promotion of Science, Tokyo Medical and Dental University, 113-8510 Tokyo, Japan.
| | - Toru Nikaido
- Cariology and Operative Dentistry, Oral Restitution Department, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, 113-8549 Tokyo, Japan.
| | - Michael F Burrow
- Faculty of Dentistry, University of Hong Kong, Hong Kong, China.
| | - Junji Tagami
- Cariology and Operative Dentistry, Oral Restitution Department, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, 113-8549 Tokyo, Japan.
| |
Collapse
|
38
|
Yu OY, Zhao IS, Mei ML, Lo ECM, Chu CH. Effect of Silver Nitrate and Sodium Fluoride with Tri-Calcium Phosphate on Streptococcus mutans and Demineralised Dentine. Int J Mol Sci 2018; 19:ijms19051288. [PMID: 29693627 PMCID: PMC5983598 DOI: 10.3390/ijms19051288] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Revised: 04/19/2018] [Accepted: 04/24/2018] [Indexed: 12/01/2022] Open
Abstract
This study investigated the effect of 25% silver nitrate (AgNO3) and 5% sodium fluoride (NaF) varnish with functionalized tri-calcium phosphate (fTCP) on a Streptococcus mutans (S. mutans) biofilm and dentine caries lesion. Demineralised dentine specimens were treated with 25% AgNO3 and 5% NaF + fTCP (Group 1), 25% AgNO3 and 5% NaF (Group 2), 25% AgNO3 (Group 3), or water (Group 4). The specimens were subjected to a S. mutans biofilm challenge after treatment. The biofilm was then studied via scanning electron microscopy (SEM), confocal laser scanning microscopy (CLSM), and colony forming units (CFU). The specimens were assessed by micro-computed tomography, X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR). SEM and CLSM revealed less biofilm in Groups 1 to 3. The log10 CFU of Groups 1 to 4 were 4.5 ± 0.7, 4.4 ± 0.9, 4.4 ± 0.9, and 6.7 ± 1.0, respectively (Groups 1, 2, 3 < 4, p < 0.001). The lesion depths of Groups 1 to 4 were 212.6 ± 20.1 µm, 280.8 ± 51.6 µm, 402.5 ± 61.7 µm, and 497.4 ± 67.2 µm, respectively (Groups 1 < 2 < 3 < 4, p < 0.001). XRD demonstrated silver chloride formation in Groups 1, 2, and 3. FTIR found the amide I: HPO42− values of the four groups were 0.22 ± 0.05, 0.25 ± 0.05, 0.41 ± 0.12, and 0.64 ± 0.14, respectively (Groups 1, 2 < 3 < 4; p < 0.001). In conclusion, this study revealed that AgNO3 and NaF + fTCP reduced the damage of dentine caries by cariogenic biofilm.
Collapse
Affiliation(s)
- Ollie Yiru Yu
- Faculty of Dentistry, The University of Hong Kong, Hong Kong, China.
| | | | - May Lei Mei
- Faculty of Dentistry, The University of Hong Kong, Hong Kong, China.
| | | | - Chun-Hung Chu
- Faculty of Dentistry, The University of Hong Kong, Hong Kong, China.
| |
Collapse
|
39
|
Augusto MG, Torres C, Pucci CR, Schlueter N, Borges AB. Bond Stability of a Universal Adhesive System to Eroded/Abraded Dentin After Deproteinization. Oper Dent 2018; 43:291-300. [PMID: 29676982 DOI: 10.2341/16-173-l] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
OBJECTIVE Erosive/abrasive challenges can potentially compromise bonding to dentin. Aiming to improve the quality and stability of bonding to this substrate, this study investigated the combined effect of erosion and toothbrush abrasion on the microtensile bond strength (μTBS) stability to dentin using a universal adhesive system in total and self-etching modes, associated or not associated with deproteinization. METHODS Bovine dentin specimens were divided into five groups according to the organic matrix condition (n=20): control (C); erosion (E); erosion + abrasion (EA); erosion + sodium hypochlorite (EH); erosion + abrasion + sodium hypochlorite (EAH). The groups were further divided (n=10) according to the mode of application (total or self-etching) of a universal adhesive. After the bonding procedure, composite blocks were built up, and the samples were cut to obtain sticks for μTBS testing. For each specimen, one-half of the sticks was immediately tested, and the other one-half was tested after artificial aging (5000 thermocycles, 5°C and 55°C). RESULTS Three-way analysis of variance (α=5%) showed a significant difference for the triple interaction ( p=0.0007). Higher μTBS means were obtained for the EH and EAH groups compared with the E and EA groups. The control group showed immediate μTBS values similar to that of the E and EA groups for both bond strategies. CONCLUSIONS Erosion and erosion/abrasion did not significantly influence the immediate μTBS to dentin. Artificial aging reduced μTBS values for the groups C, E, and EA using the total-etching mode. Deproteinization maintained the bond stability to artificially aged eroded and eroded/abraded dentin.
Collapse
|
40
|
Ebrahimi M, Naseh A, Abdollahi M, Shirazi AS. Can Chlorhexidine enhance the Bond Strength of Self-etch and Etch-and-rinse Systems to Primary Teeth Dentin? J Contemp Dent Pract 2018; 19:404-408. [PMID: 29728544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Introduction: Modifying the durability of resin bonding systems resulted in introducing materials with cross-link property, such as chlorhexidine (CHX) that can promote the strength of resin-dentin bonding. The aim of this study was evaluation of the effect of CHX on shear bond strength (SBS) of self-etch (SE) and etch-and-rinse (E&R) bonding systems to the primary teeth dentin. Materials and methods: In this in vitro study, 40 freshly extracted primary molars collected and were cut mesiodistally, and then the buccal and lingual surface enamel was grounded. The specimens were randomly divided into two groups: I: Single Bond adhesive and II: Clearfil SE Bond adhesive. Then, each group was divided into two subgroups: On the buccal surface of each sample CHX was applied for 30 seconds and on the lingual surface of (I2, II2 groups), CHX was not applied. The SBS (MPa) of samples was assessed using the Zwick universal testing machine. Data were analyzed by paired t-test and independent t-test using Statistical Package for the Social Sciences (SPSS), version 16. Results: The mean SBS was significantly higher in the Single Bond group with CHX (66.45 ± 8.3) than without CHX (25.43 ± 12.94) in the nonaging group (p = 0.002). There was no significant difference in the mean SBS in the Clearfil SE Bond group with CHX and without CHX in the aging and nonaging groups. Conclusion: CHX had positive influence on immediate SBS of Single Bond adhesive to primary teeth dentin. In addition, no positive effect has been seen in the Clearfil SE Bond system. Clinical significance: Now more researches are needed about the recommendation of CHX in resin restorations of primary teeth. Keywords: Chlorhexidine, Etch-and-rinse adhesive, Failure pattern, Self-etch adhesive, Shear bond strength.
Collapse
Affiliation(s)
- Masoumeh Ebrahimi
- Department of Pediatric Dentistry, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Islamic Republic of Iran; Dental Materials Research Center, Mashhad University of Medical Sciences, Mashhad, Islamic Republic of Iran
| | - Atefeh Naseh
- Department of Oral and Maxillofacial Pathology, Mashhad University of Medical Sciences, Mashhad, Islamic Republic of Iran
| | - Mojtaba Abdollahi
- Department of Pediatric Dentistry, Mashhad University of Medical Sciences, Mashhad, Islamic Republic of Iran
| | - Alireza Sarraf Shirazi
- Department of Pediatric Dentistry, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Islamic Republic of Iran; Dental Materials Research Center, Mashhad University of Medical Sciences, Mashhad, Islamic Republic of Iran, Phone: +985138832300, e-mail:
| |
Collapse
|
41
|
Moura SK, Lopes CC, Trevelin LT, Matos AB, Martinez ÍVL, Estevam M, Bussadori SK. Effects of different treatments on chemical and morphological features of eroded dentin. Lasers Med Sci 2018; 33:1441-1446. [PMID: 29582261 DOI: 10.1007/s10103-018-2482-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Accepted: 03/09/2018] [Indexed: 10/17/2022]
Abstract
To evaluate the treatment of eroded dentin (Sensodyne Repair & Protect™, Er:YAG laser and combinations). The occlusal surfaces of 25 third molars were sectioned 1.5 mm in thickness. After an erosion cycle (5 min in demineralizing solution + 3 h in remineralizing solution; six cycles a day for 8 days), the samples were divided into five groups (n = 5): (E) erosion - control; (ES) erosion + Sensodyne Repair & Protect (NovaMin); (EL) erosion + Er:YAG laser (40 mJ, 10 Hz, 0.4 W, 50 μs, 3.1 J/cm2, 63 W/cm2); (ELS) erosion + Er:YAG laser + Sensodyne; and (ESL) erosion + Sensodyne + Er:YAG laser. Following storage in ultrapure water (37 °C/14 days), the Ca/P ratio was evaluated by EDXRF and the morphology surfaces examined in SEM. The percentage of exposed dentin tubules was calculated. One-way analysis of variance and Tukey's test at 5% were used to treat the data. The Ca/P ratio was higher in E and ES groups. More exposed dentin tubules were found in E group and less exposed tubules were found in the ES group (p < 0.0001). When the toothpaste and laser were combined, the number of occluded dentin tubules was higher when laser was performed first (ELS). A positive effect was found when the laser and toothpaste were combined.
Collapse
Affiliation(s)
- Sandra Kiss Moura
- Department of Dentistry, University North of Parana (UNOPAR), Rua Marselha 183, Londrina, 86010141, Brazil.
- Department of Biophotonics Applied to Health Sciences, Nove de Julho University (UNINOVE), Rua Vergueiro 245, São Paulo, 01504000, Brazil.
| | - Carolina Cury Lopes
- Department of Dentistry, University North of Parana (UNOPAR), Rua Marselha 183, Londrina, 86010141, Brazil
| | - Livia Tosi Trevelin
- Department of Dentistry, University of São Paulo (FOUSP), Av Prof Lineu Prestes 2227, São Paulo, 05508000, Brazil
| | - Adriana Bona Matos
- Department of Dentistry, University of São Paulo (FOUSP), Av Prof Lineu Prestes 2227, São Paulo, 05508000, Brazil
| | | | - Marcelo Estevam
- LPIS Health Research and Innovation Laboratory, Federal Institute of Parana (IFPR), Av João XXIII 600, Londrina, 86060370, Brazil
| | - Sandra Kalil Bussadori
- Department of Biophotonics Applied to Health Sciences, Nove de Julho University (UNINOVE), Rua Vergueiro 245, São Paulo, 01504000, Brazil
| |
Collapse
|
42
|
Oliveira LV, Maia TS, Zancopé K, Menezes MDS, Soares CJ, Moura CCG. Can intra-radicular cleaning protocols increase the retention of fiberglass posts? A systematic review. Braz Oral Res 2018; 32:e16. [PMID: 29561949 DOI: 10.1590/1807-3107bor-2018.vol32.0016] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2017] [Accepted: 01/30/2018] [Indexed: 11/22/2022] Open
Abstract
The presence of residues within the root canal after post-space preparation can influence the bond strength between resin cement and root dentin when using fiberglass posts (FGPs). Currently, there is no consensus in the literature regarding what is the best solution for the removal of debris after post-space preparation. This systematic review involved "in vitro" studies to investigate if cleaning methods of the root canal after post-space preparation can increase the retention of FGPs evaluated by the push-out test. Searches were carried out in PubMed (MEDLINE) and Scopus databases up to July2017. English language studies published from 2007 to July 2017 were selected. 475 studies were found, and 9 were included in this review. Information from the 9 studies were collected regarding the number of samples, storage method after extraction, root canal preparation, method of post-space preparation, endodontic sealer, resin cement, cleaning methods after post-space and presence of irrigant activation. Five studies presented the best results for the association of sodium hypochlorite (NaOCl) and ethylenediamine tetra-acetic acid (EDTA), while in the other 4 studies, the solutions that showed improved retention of FGPs were photon-induced photoacoustic streaming (PIPS), Qmix, Sikko and EDTA. The results showed heterogeneity in all comparisons due to a high variety of information about cleaning methods, different concentrations, application time, type of adhesive system and resin cements used. In conclusion, this review suggests that the use of NaOCl/EDTA results in the retention of FGPs and may thus be recommended as a post-space cleaning method influencing the luting procedure.
Collapse
Affiliation(s)
- Lilian Vieira Oliveira
- Universidade Federal de Uberlândia - UFU, School of Dentistry, Department of Endodontics, Uberlândia, MG, Brazil
| | - Thais Souza Maia
- Universidade Federal de Uberlândia - UFU, School of Dentistry, Department of Operative Dentistry and Dental Materials, Uberlândia, MG, Brazil
| | - Karla Zancopé
- Universidade Federal de Uberlândia - UFU, School of Dentistry, Department of Occlusion, Fixed Prostheses, and Dental Materials, Uberlândia, MG, Brazil
| | - Murilo de Souza Menezes
- Universidade Federal de Uberlândia - UFU, School of Dentistry, Department of Operative Dentistry and Dental Materials, Uberlândia, MG, Brazil
| | - Carlos José Soares
- Universidade Federal de Uberlândia - UFU, School of Dentistry, Department of Operative Dentistry and Dental Materials, Uberlândia, MG, Brazil
| | | |
Collapse
|
43
|
Lucchese A, Bertacci A, Zanna S, Chersoni S, Manuelli M, Visone A, Moro D, Valdrè G. In vitro effects of fluoride-based and desensitizing toothpastes on dentine permeability. J BIOL REG HOMEOS AG 2018; 32:51-58. [PMID: 29720331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
This study aims to evaluate the effectiveness in reducing dentine permeability of three different toothpastes comparing with a sodium fluoride one. Dentine permeability was measured by a fluid filtration system. Dentin discs were randomized in four experimental groups and treated with different commercial toothpastes, as it follows. Group A: Sensodyne® Rapid, with strontium acetate; group B: Elmex Sensitive ProfessionalTM, with arginine and 450 ppm monofluoro-phosphate; group C: Colgate Total Advanced®, with 1450 ppm NaF; group D: AZ Pro-Expert®, with 1100 ppm SnF2. After brushing specimens of each groups were assigned to two subgroups and: 1) stored in artificial saliva (2 h) and treated with 6% citric acid for 1 min; 2) stored in artificial saliva for 24 h. SEM analysis was performed to investigate dentinal tubules occlusion of acid treated and stored in artificial saliva samples. Dentin permeability proved affected by dentifrice treatments. The toothpastes specifically formulated for hypersensitivity showed significant effects concerning decrease of dentine permeability. SEM observations demonstrated the presence of dentifrice particles on dentin surface and inside dentin tubules. Stannous fluoride treated samples exhibited the greater tubules occlusion.
Collapse
Affiliation(s)
- A Lucchese
- Department of Orthodontics, Vita-Salute San Raffaele University, Milan, Italy
- Unit of Dentistry, Division of Orthodontics, Research area in Dentofacial Orthopedics and Orthodontics, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - A Bertacci
- Department of Biomedical and Neuromotor Sciences (DiBiNeM), School of Dentistry, University of Bologna, Bologna, Italy
| | - S Zanna
- Department of Biological, Geological, and Environmental Sciences, University of Bologna, Bologna, Italy
| | - S Chersoni
- Department of Biomedical and Neuromotor Sciences (DiBiNeM), School of Dentistry, University of Bologna, Bologna, Italy
| | - M Manuelli
- Department of Orthodontics, Vita-Salute San Raffaele University, Milan, Italy
- Unit of Dentistry, Division of Orthodontics, Research area in Dentofacial Orthopedics and Orthodontics, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - A Visone
- Department of Orthodontics, Vita-Salute San Raffaele University, Milan, Italy
| | - D Moro
- Department of Biological, Geological, and Environmental Sciences, University of Bologna, Bologna, Italy
| | - G Valdrè
- Department of Biological, Geological, and Environmental Sciences, University of Bologna, Bologna, Italy
| |
Collapse
|
44
|
Alex G. Direct and Indirect Pulp Capping: A Brief History, Material Innovations, and Clinical Case Report. Compend Contin Educ Dent 2018; 39:182-189. [PMID: 29493248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Among the goals of pulp capping are to manage bacteria, arrest caries progression, stimulate pulp cells to form new dentin, and produce a durable seal that protects the pulp complex. This article will provide a general discussion of direct and indirect pulp capping procedures, offering practitioners a pragmatic and science-based clinical protocol for treatment of vital pulp exposures. A clinical case will be presented in which a novel light-cured resin-modified mineral trioxide aggregate hybrid material was used to manage a mechanical vital pulp exposure that occurred during deep caries excavation.
Collapse
Affiliation(s)
- Gary Alex
- Private Practice, Huntington, New York
| |
Collapse
|
45
|
Pereira DL, Freitas AZ, Bachmann L, Benetti C, Zezell DM, Ana PA. Variation on Molecular Structure, Crystallinity, and Optical Properties of Dentin Due to Nd:YAG Laser and Fluoride Aimed at Tooth Erosion Prevention. Int J Mol Sci 2018; 19:ijms19020433. [PMID: 29389868 PMCID: PMC5855655 DOI: 10.3390/ijms19020433] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Revised: 01/25/2018] [Accepted: 01/26/2018] [Indexed: 11/16/2022] Open
Abstract
This in vitro study evaluated the compositional, crystalline, and morphological effects promoted by Nd:YAG laser on root dentin, and verified the effects of laser and topical acidulated phosphate fluoride application (APF-gel) on dentin erosion. 180 bovine dentin slabs were randomized into 4 groups (n = 45): G1–untreated, G2–APF-gel (1.23% F−, 4 min), G3–Nd:YAG (1064 nm, 84.9 J/cm2, 10 Hz), and G4–APF-gel application followed by Nd:YAG laser irradiation. The compositional, crystalline, and morphological effects promoted by treatments were investigated on five samples of each experimental group. The other samples were submitted to a 5-day, 10-day, or 15-day erosive and abrasive demineralization and remineralization cycling in order to create erosion lesions. The area and depth of lesions, as well as the optical attenuation coefficient, were assessed, and all data were statistically analysed (p < 0.05). Nd:YAG laser promoted the reduction of carbonate, the formation of tetracalcium phosphate, as well as the melting and recrystallization of the dentin surface. Laser significantly decreased the area and depth of erosion lesions and altered the optical attenuation coefficient when compared to untreated and APF-gel groups, but the association of APF-gel and laser did not promote an additional effect. Nd:YAG laser irradiation can be a promissory treatment to prevent dentin erosion and the abrasion process.
Collapse
Affiliation(s)
- Daísa L Pereira
- Center for Engineering, Modeling and Applied Social Sciences, Universidade Federal do ABC, Sao Bernardo do Campo, SP 09606-045, Brazil.
- Center for Lasers and Applications, Instituto de Pesquisas Energéticas e Nucleares, IPEN-CNEN/SP, Sao Paulo, SP 05508-000, Brazil.
| | - Anderson Z Freitas
- Center for Lasers and Applications, Instituto de Pesquisas Energéticas e Nucleares, IPEN-CNEN/SP, Sao Paulo, SP 05508-000, Brazil.
| | - Luciano Bachmann
- Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de Sao Paulo, Ribeirao Preto, SP 14040-900, Brazil.
| | - Carolina Benetti
- Center for Engineering, Modeling and Applied Social Sciences, Universidade Federal do ABC, Sao Bernardo do Campo, SP 09606-045, Brazil.
| | - Denise M Zezell
- Center for Lasers and Applications, Instituto de Pesquisas Energéticas e Nucleares, IPEN-CNEN/SP, Sao Paulo, SP 05508-000, Brazil.
| | - Patricia A Ana
- Center for Engineering, Modeling and Applied Social Sciences, Universidade Federal do ABC, Sao Bernardo do Campo, SP 09606-045, Brazil.
| |
Collapse
|
46
|
Zhang L, Sun H, Yu J, Yang H, Song F, Huang C. Application of electrophoretic deposition to occlude dentinal tubules in vitro. J Dent 2018; 71:43-48. [PMID: 29391182 DOI: 10.1016/j.jdent.2018.01.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Revised: 01/21/2018] [Accepted: 01/26/2018] [Indexed: 11/18/2022] Open
Abstract
OBJECTIVES This study aims to apply electrophoretic deposition (EPD) for occlusion of dentinal tubules in vitro and investigate its effect on tubule occlusion and shear bond strength (SBS). METHODS Charged mesoporous silica nanoparticles (MSNs) were synthesized and characterized through field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), dynamic light scattering (DLS), and Fourier transform infrared (FT-IR) spectroscopy analyses. Thirty-nine sensitive dentin specimens were modeled and assigned randomly to three groups with different treatments (n = 13 each): group 1, immersion in the MSN suspension; and groups 2 and 3, anodic EPD with the specimen on the negative and positive electrode respectively. The effect of dentinal tubule occlusion was evaluated by dentin permeability test (n = 10 each) and FESEM examination (n = 3 each). Moreover, 18 specimens were grouped (n = 6 each) and treated in the same method. A resin stick was bonded onto each of the specimen using a self-etch adhesive (single bond universal) for SBS testing. RESULTS Negatively-charged MSNs were synthesized and characterized as small and well-dispersed particles. After the EPD treatment (group 3), the dentinal tubules were effectively occluded by MSNs, which infiltrated into the tubules at a depth of approximately 7-8 μm and tightly associated with the tubular inwalls. SBS was not significantly different among the three groups (P > 0.05). CONCLUSIONS Synthesized MSNs were deposited into dentinal tubules by EPD treatment without compromising dentin bond strength. CLINICAL SIGNIFICANCE Application of EPD is a new approach for occlusion of dentinal tubules and exhibits potential in the study of dentin hypersensitivity.
Collapse
Affiliation(s)
- Lu Zhang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan 430079, China
| | - Hualing Sun
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan 430079, China
| | - Jian Yu
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan 430079, China
| | - Hongye Yang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan 430079, China
| | - Fangfang Song
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan 430079, China
| | - Cui Huang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan 430079, China.
| |
Collapse
|
47
|
Loison-Robert LS, Tassin M, Bonte E, Berbar T, Isaac J, Berdal A, Simon S, Fournier BPJ. In vitro effects of two silicate-based materials, Biodentine and BioRoot RCS, on dental pulp stem cells in models of reactionary and reparative dentinogenesis. PLoS One 2018; 13:e0190014. [PMID: 29370163 PMCID: PMC5784909 DOI: 10.1371/journal.pone.0190014] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Accepted: 12/06/2017] [Indexed: 01/03/2023] Open
Abstract
Background Calcium silicate-based cements are biomaterials with calcium oxide and carbonate filler additives. Their properties are close to those of dentin, making them useful in restorative dentistry and endodontics. The aim of this study was to evaluate the in vitro biological effects of two such calcium silicate cements, Biodentine (BD) and Bioroot (BR), on dental stem cells in both direct and indirect contact models. The two models used aimed to mimic reparative dentin formation (direct contact) and reactionary dentin formation (indirect contact). An original aspect of this study is the use of an interposed thin agarose gel layer to assess the effects of diffusible components from the materials. Results The two biomaterials were compared and did not modify dental pulp stem cell (DPSC) proliferation. BD and BR showed no significant cytotoxicity, although some cell death occurred in direct contact. No apoptosis or inflammation induction was detected. A striking increase of mineralization induction was observed in the presence of BD and BR, and this effect was greater in direct contact. Surprisingly, biomineralization occurred even in the absence of mineralization medium. This differentiation was accompanied by expression of odontoblast-associated genes. Exposure by indirect contact did not stimulate the induction to such a level. Conclusion These two biomaterials both seem to be bioactive and biocompatible, preserving DPSC proliferation, migration and adhesion. The observed strong mineralization induction through direct contact highlights the potential of these biomaterials for clinical application in dentin-pulp complex regeneration.
Collapse
Affiliation(s)
- Ludwig Stanislas Loison-Robert
- School of Dentistry, Paris Descartes University, Sorbonne Paris Cité, Paris, France
- « Molecular Oral Pathophysiology » group, INSERM UMRS 1138, Cordeliers Research Center, Paris Descartes University, Paris, France
- « Molecular Oral Pathophysiology » group, INSERM UMRS 1138, Cordeliers Research Center, Pierre and Marie Curie University, Paris, France
- UMRS 1138, Cordeliers Research Center, Paris Diderot University, Paris, France
| | - Mathilde Tassin
- « Molecular Oral Pathophysiology » group, INSERM UMRS 1138, Cordeliers Research Center, Paris Descartes University, Paris, France
- « Molecular Oral Pathophysiology » group, INSERM UMRS 1138, Cordeliers Research Center, Pierre and Marie Curie University, Paris, France
- UMRS 1138, Cordeliers Research Center, Paris Diderot University, Paris, France
| | - Eric Bonte
- School of Dentistry, Paris Descartes University, Sorbonne Paris Cité, Paris, France
- « Molecular Oral Pathophysiology » group, INSERM UMRS 1138, Cordeliers Research Center, Paris Descartes University, Paris, France
- « Molecular Oral Pathophysiology » group, INSERM UMRS 1138, Cordeliers Research Center, Pierre and Marie Curie University, Paris, France
- UMRS 1138, Cordeliers Research Center, Paris Diderot University, Paris, France
| | - Tsouria Berbar
- « Molecular Oral Pathophysiology » group, INSERM UMRS 1138, Cordeliers Research Center, Paris Descartes University, Paris, France
- « Molecular Oral Pathophysiology » group, INSERM UMRS 1138, Cordeliers Research Center, Pierre and Marie Curie University, Paris, France
- UMRS 1138, Cordeliers Research Center, Paris Diderot University, Paris, France
| | - Juliane Isaac
- « Molecular Oral Pathophysiology » group, INSERM UMRS 1138, Cordeliers Research Center, Paris Descartes University, Paris, France
- « Molecular Oral Pathophysiology » group, INSERM UMRS 1138, Cordeliers Research Center, Pierre and Marie Curie University, Paris, France
- UMRS 1138, Cordeliers Research Center, Paris Diderot University, Paris, France
- Faculty of Dentistry, Paris Diderot University, Sorbonne Paris Cité, Paris, France
| | - Ariane Berdal
- « Molecular Oral Pathophysiology » group, INSERM UMRS 1138, Cordeliers Research Center, Paris Descartes University, Paris, France
- « Molecular Oral Pathophysiology » group, INSERM UMRS 1138, Cordeliers Research Center, Pierre and Marie Curie University, Paris, France
- UMRS 1138, Cordeliers Research Center, Paris Diderot University, Paris, France
- Faculty of Dentistry, Paris Diderot University, Sorbonne Paris Cité, Paris, France
| | - Stéphane Simon
- « Molecular Oral Pathophysiology » group, INSERM UMRS 1138, Cordeliers Research Center, Paris Descartes University, Paris, France
- « Molecular Oral Pathophysiology » group, INSERM UMRS 1138, Cordeliers Research Center, Pierre and Marie Curie University, Paris, France
- UMRS 1138, Cordeliers Research Center, Paris Diderot University, Paris, France
- Faculty of Dentistry, Paris Diderot University, Sorbonne Paris Cité, Paris, France
| | - Benjamin P. J. Fournier
- « Molecular Oral Pathophysiology » group, INSERM UMRS 1138, Cordeliers Research Center, Paris Descartes University, Paris, France
- « Molecular Oral Pathophysiology » group, INSERM UMRS 1138, Cordeliers Research Center, Pierre and Marie Curie University, Paris, France
- UMRS 1138, Cordeliers Research Center, Paris Diderot University, Paris, France
- Faculty of Dentistry, Paris Diderot University, Sorbonne Paris Cité, Paris, France
- * E-mail:
| |
Collapse
|
48
|
Aydin B, Hassan LS, Viana G, Bedran-Russo AK. Assessing Collagen and Micro-permeability at the Proanthocyanidin-treated Resin-Dentin Interface. J Adhes Dent 2017; 18:529-534. [PMID: 27933323 DOI: 10.3290/j.jad.a37359] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
PURPOSE To establish a fluorescence-based method to simultaneously assess micro-permeability and collagen cross-linking induced by chemical agents at the resin-dentin interface. MATERIALS AND METHODS Three chemical agents were investigated (proanthocyanidin-rich grape seed extract: GSE; carbodiimide hydrochloride/N-hydroxysuccinimide: EDC/NHS; glutaraldehyde: GD) along with a control (distilled water) as primers applied on flat occlusal dentin surfaces of 48 teeth and restored with two commercially available etch-and-rinse adhesives. Resin-dentin interfaces were polished and infiltrated with rhodamine-B solution for confocal laser scanning microscopy analysis. Parameters were chosen that would allow acquisition of a simultaneous appearance of collagen and interfacial micro-permeability (rhodamine-B). Fluorescence emission intensity (FEI) was converted into numerals and values were calculated for each group. Data were statistically analyzed using one-way ANOVA and post-hoc Scheffe's and multiple comparisons tests (α = 0.05). T-tests with Pearson correlations were used to investigate correlations between collagen cross-linking and micro-permeability. RESULTS The FEI of collagen was the highest for GD, followed by GSE, with no significant differences between EDC/ NHS and the control group (p > 0.05). Micro-permeability was significantly affected by the adhesives (p < 0.05). Micro- permeability was the lowest for GSE groups, regardless of the adhesives (p < 0.001). Weak correlations were found between micro-permeability and collagen auto-fluorescence. CONCLUSIONS Non-enzymatic collagen cross-linking induced by GSE and GD can be detected by increased collagen auto-fluorescence, and results in reduced interfacial micro-permeability. Increased collagen auto-fluorescence was correlated with fluorescent collagen cross-links and decreased micro-permeability at the resin-dentin interface. Collagen auto-fluorescence is a useful tool to detect auto-fluorescent exogenous cross links and their potential impact on the quality of the resin-dentin interface.
Collapse
|
49
|
Soares CJ, Ferreira MS, Bicalho AA, de Paula Rodrigues M, Braga S, Versluis A. Effect of Light Activation of Pulp-Capping Materials and Resin Composite on Dentin Deformation and the Pulp Temperature Change. Oper Dent 2017; 43:71-80. [PMID: 28976847 DOI: 10.2341/16-325-l] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
OBJECTIVES To analyze the effect of pulp-capping materials and resin composite light activation on strain and temperature development in the pulp and on the interfacial integrity at the pulpal floor/pulp-capping materials in large molar class II cavities. METHODS Forty extracted molars received large mesio-occlusal-distal (MOD) cavity bur preparation with 1.0 mm of dentin remaining at the pulp floor. Four pulp-capping materials (self-etching adhesive system, Clearfil SE Bond [CLE], Kuraray), two light-curing calcium hydroxide cements (BioCal [BIO], Biodinâmica, and Ultra-Blend Plus [ULT], Ultradent), and a resin-modified glass ionomer cement- (Vitrebond [VIT], 3M ESPE) were applied on the pulpal floor. The cavities were incrementally restored with resin composite (Filtek Z350 XT, 3M ESPE). Thermocouple (n=10) and strain gauge (n=10) were placed inside the pulp chamber in contact with the top of the pulpal floor to detect temperature changes and dentin strain during light curing of the pulp-capping materials and during resin composite restoration. Exotherm was calculated by subtracting postcure from polymerization temperature (n=10). Interface integrity at the pulpal floor was investigated using micro-CT (SkyScan 1272, Bruker). The degree of cure of capping materials was calculated using the Fourier transform infrared and attenuated total reflectance cell. Data were analyzed using one-way analysis of variance followed by the Tukey test (α=0.05). RESULTS Pulpal dentin strains (μs) during light curing of CLE were higher than for other pulp-capping materials ( p<0.001). During resin composite light activation, the pulpal dentin strain increased for ULT, VIT, and CLE and decreased for BIO. The pulpal dentin strain was significantly higher during pulp-capping light activation. The temperature inside the pulp chamber increased approximately 3.5°C after light curing the pulp-capping materials and approximately 2.1°C after final restoration. Pulp-capping material type had no influence temperature increase. The micro-CT showed perfect interfacial integrity after restoration for CLE and ULT; however, gaps were found between BIO and pulpal floor in all specimens. BIO had a significantly lower degree of conversion than ULT, VIT, and CLE. CONCLUSIONS Light curing of pulp-capping materials caused deformation of pulpal dentin and increased pulpal temperature in large MOD cavities. Shrinkage of the resin composite restoration caused debonding of BIO from the pulpal floor.
Collapse
|
50
|
Wegehaupt FJ, Kummer G, Attin T. Prevention of erosions by a surface sealant and adhesives under abrasive conditions. Swiss Dent J 2017; 127:740-747. [PMID: 29228763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
It was the aim of the current in vitro study to test the erosion-preventive potential of an experimental surface sealant (K-0184) and currently marketed self-etch adhesive systems under abrasive conditions. Ninety-six dentine specimens were randomly allocated to eight groups (n=12): (1) positive control (no treatment), (2) K-0184, (3) Shield Force Plus, (4) Xeno Select, (5) Scotchbond Universal, (6) Adhese Universal, (7) OptiBond All-In-One, and (8) Clearfil SE Bond. Before and after sealing, dentine specimens were measured profilometrically to determine the layer thickness of the protective agents.During 12 days, the specimens were demineralized daily for 5 min using hydrochloric acid (pH=3) and abraded by applying 600 brushing strokes (F=2.5 N). Calcium content in the hydrochloric acid was determined using atomic absorption spectroscopy. Calcium concentration was consistently highest in the positive control group (p < 0.05 compared to all other groups). The lowest cumulated Ca release was measured for K-0184; it differed significantly (p < 0.05) from that determined in groups 4, 6, and 7. K-0184 also had the highest layer thickness (p < 0.05 compared to all other groups). It was concluded that the experimental surface sealant K-0184 and the adhesive systems Xeno Select, Scotchbond Universal, Adhese Universal, and Clearfil SE Bond prevent dentine erosion under the current abrasive conditions with a total of 7,200 brush strokes.
Collapse
Affiliation(s)
- Florian J. Wegehaupt
- Clinic for Preventive Dentistry, Periodontology, and Cariology, University of Zurich, Center for Dental Medicine
| | - Géraldine Kummer
- Clinic for Preventive Dentistry, Periodontology, and Cariology, University of Zurich, Center for Dental Medicine
| | - Thomas Attin
- Clinic for Preventive Dentistry, Periodontology, and Cariology, University of Zurich, Center for Dental Medicine
| |
Collapse
|