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Almohareb T, Al Ahdal K, Maawadh AM, Al Deeb L, Alshamrani AS, Alrahlah A. Bleached enamel reversal using grape seed extract, green tea, curcumin-activated photodynamic therapy, and Er: YAG on microleakage and bond integrity of composite material bonded to the enamel surface. Photodiagnosis Photodyn Ther 2024; 45:103943. [PMID: 38145770 DOI: 10.1016/j.pdpdt.2023.103943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Revised: 11/30/2023] [Accepted: 12/18/2023] [Indexed: 12/27/2023]
Abstract
AIMS Bleached enamel reversal using antioxidants sodium ascorbate (SA), Green tea extract (GTE), grape seed extract (GSE), Curcumin photosensitizer (CP) and Er: YAG laser on the adhesive strength and marginal leakage of composite material bonded to the bleached enamel surface. MATERIALS AND METHODS Enamel surface of hundred and twenty sound human first premolar teeth was cleansed using pumice and bleached with 35 % hydrogen peroxide. The samples were randomly divided into 5 groups based on the antioxidants used. n = 20 Group 1 (Control): No antioxidant agent, Group 2: 10 % SA solution, Group 3: 6.5 % GSE, Group 4: 5 % GTE, Group 5: Er: YAG laser and Group 6: CP. Following reversal, the composite was built and cured for 40 s. All the specimens were stored in distilled water at room temperature for 1 day. Microleakage, SBS, and failure mode were analyzed. Kolmogorov-Smirnov test, one-way analysis of variance, and Tukey's multiple post hoc test were used to analyze the data statistically. RESULTS Group 2 (SA) (20.11 ± 5.79 nm) exhibited minimum value of microleakage and highest SBS (10.22 ± 1.62 MPa). Whereas, Group 1 (No antioxidant agent) displayed maximum scores of marginal leakage (28.11±8.89 nm) and lowest SBS (7.02 ± 1.22 MPa). CONCLUSION CP, GTE and GSE can be used as a potential alternative to the commonly used SA solution to reverse the negative impact of bleaching on the enamel surface. The use of reversal agents CP, GTE and GSE improves bond values with a decrease in microleakage scores However, future studies are still warranted to conclude the outcomes of the existing study.
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Affiliation(s)
- Thamer Almohareb
- Restorative Dental Science Department, College of Dentistry, King Saud University, Riyadh 11545, Saudi Arabia
| | - Khold Al Ahdal
- Restorative Dental Science Department, College of Dentistry, King Saud University, Riyadh 11545, Saudi Arabia
| | - Ahmed M Maawadh
- Restorative Dental Science Department, College of Dentistry, King Saud University, Riyadh 11545, Saudi Arabia
| | - Laila Al Deeb
- Restorative Dental Science Department, College of Dentistry, King Saud University, Riyadh 11545, Saudi Arabia
| | - Ahoud S Alshamrani
- Restorative Dental Science Department, College of Dentistry, King Saud University, Riyadh 11545, Saudi Arabia
| | - Ali Alrahlah
- Restorative Dental Science Department, College of Dentistry, King Saud University, Riyadh 11545, Saudi Arabia.
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Yang Y, Inoue G, Hosaka K, Tichy A, Ikeda M, Tagami J, Shimada Y. The Effect of a Deproteinizing Pretreatment on the Bonding Performance and Acid Resistance of a Two-step Self-etch Adhesive on Eroded Dentin. Oper Dent 2024; 49:65-75. [PMID: 38019217 DOI: 10.2341/23-005-l] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/02/2023] [Indexed: 11/30/2023]
Abstract
OBJECTIVES This study evaluated how deproteinization using sodium hypochlorite (6% NaOCl) or hypochlorous acid (50 ppm HOCl) with or without the subsequent use of an arylsulfinate salt-containing agent (Clearfil DC Activator; DCA; Kuraray Noritake Dental) affects the micro-tensile bond strength (μTBS) and formation of an acid-base resistant zone (ABRZ) of a two-step self-etch adhesive on eroded dentin. METHODS Coronal dentin surfaces of sound human molars were exposed to 48 cycles of demineralization (1% citric acid; 5 minutes) and remineralization (buffer solution with pH=6.4; 3.5 hours). They were then assigned to experimental groups according to the pretreatment used: none (negative control), NaOCl, NaOCl+DCA, HOCl, and HOCl+DCA. Sound dentin surfaces with no pretreatment were used as a positive control. The dentin surfaces were bonded with Clearfil SE Bond 2 (Kuraray Noritake Dental), and μTBS was measured either after 24 hours or 20,000 thermal cycles (TC). The μTBS data were statistically analyzed using a mixed-model analysis of variance (ANOVA) and t-tests with Bonferroni correction. Failure mode was determined with scanning electron microscopy (SEM), which was also used for the observation of ABRZ. RESULTS Among experimental groups, there was no significant difference between the negative control, HOCl, and HOCl+DCA after 24 hours, but the HOCl-pretreated groups exhibited significantly higher μTBS than the negative control after TC (p<0.01). Pretreatment with NaOCl and NaOCl+DCA resulted in significantly higher μTBS (p<0.001), but the highest μTBS was measured on sound dentin (p<0.001). TC decreased μTBS significantly in all groups (p<0.001) except for sound dentin and NaOCl+DCA (p>0.05). Adhesive failures prevailed in eroded groups, whereas cohesive failures were predominant on sound dentin. ABRZ was recognized in all groups but marked morphological differences were observed. CONCLUSIONS The combined use of 6% NaOCl and the arylsulfinate salt-containing agent partially reversed the compromised bonding performance on eroded dentin, while the effect of 50 ppm HOCl was negligible.
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Affiliation(s)
- Y Yang
- Yi Yang, DDS, PhD student, Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - G Inoue
- *Go Inoue, DDS, PhD, Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - K Hosaka
- Keiichi Hosaka, DDS, PhD, Department of Regenerative Dental Medicine, Tokushima University Graduate School of Biomedical Sciences, Tokushima, Japan
| | - A Tichy
- Antonin Tichy, DDS, PhD, Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan; Institute of Dental Medicine, First Faculty of Medicine of the Charles University and General University Hospital in Prague, Prague, Czech Republic
| | - M Ikeda
- Masaomi Ikeda, DDS, PhD, Department of Oral Prosthetic Engineering, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - J Tagami
- Junji Tagami, DDS, PhD, Department of Operative Dentistry, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand
| | - Y Shimada
- Yasushi Shimada, DDS, PhD, Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
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Mena-Serrano A, Granda-Albuja MG, Naranjo J, Fierro EA, Favoreto MW, Loguercio AD, Reis A. Effects of the application of sodium ascorbate after in-office bleaching on the penetration of hydrogen peroxide, color change, and microtensile bond strength. Braz Dent J 2023; 34:87-94. [PMID: 38133477 PMCID: PMC10759951 DOI: 10.1590/0103-6440202305214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Accepted: 08/29/2023] [Indexed: 12/23/2023] Open
Abstract
This study aimed to evaluate the effects of the application of 10% sodium ascorbate (SA) after in-office bleaching on the penetration of hydrogen peroxide (HP) into the pulp chamber, color change, and microtensile bond strength (µTBS) to the resin-enamel interface. Thirty premolars and thirty molars were randomly divided into three groups (n = 20 each). One group was exposed to deionized water (negative control). The other two groups were bleached with 35% HP in a single session for 3x15 minutes for each application. However, in only one of them, SA was applied for 10 minutes after bleaching. After, the concentration (µg/mL) of HP in each pulp chamber was evaluated by UV-Vis spectrophotometry. Color changes (ΔEab, ΔE00, and ΔWID) were evaluated with a digital spectrophotometer before and in the first week after bleaching. After treatment, molars were restored and sectioned to obtain resin-enamel interface sticks for µTBS at a crosshead speed of 1 mm/min until failure. The HP concentration and µTBS data were analyzed using one-way ANOVA and Tukey tests, and color changes were analyzed by t-tests (α = 0.05). SA application significantly improved the µTBS values and reduced the HP concentrations within the pulp chambers (p < 0.0001). The application of SA significantly interfered with the color changes after bleaching when compared to the control group (p < 0.05). Application of 10% SA after in-office bleaching successfully reduced the penetration of HP into the pulp chamber; however, it decreased color change.
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Affiliation(s)
| | | | - Jenny Naranjo
- School of Dentistry, Universidad de Las Américas, Quito, 170125, Ecuador
| | | | - Michael Willian Favoreto
- Department of Restorative Dentistry, School of Dentistry, State University of Ponta Grossa, Brazil
| | - Alessandro D. Loguercio
- Department of Restorative Dentistry, School of Dentistry, State University of Ponta Grossa, Brazil
| | - Alessandra Reis
- Department of Restorative Dentistry, School of Dentistry, State University of Ponta Grossa, Brazil
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Alanazi AM, Khan AA, Mahmood A, Tahir A, Kamal MA. The effect of ascorbic acid and cranberry on the bond strength, surface roughness, and surface hardness of bleached enamel with hydrogen peroxide and zinc phthalocyanine activated by photodynamic therapy. Photodiagnosis Photodyn Ther 2023; 43:103685. [PMID: 37390856 DOI: 10.1016/j.pdpdt.2023.103685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2023] [Revised: 06/25/2023] [Accepted: 06/28/2023] [Indexed: 07/02/2023]
Abstract
AIM To evaluate the effect of different bleaching methods 40% (hydrogen peroxide) HP and Zinc Phthalocyanine (ZP) activated by photodynamic therapy (PDT) with the utilization of diverse procedures of reversal (10% ascorbic acid and 6% cranberry solution) on bond values, surface microhardness and surface roughness of bleached enamel surface. MATERIAL AND METHODS An aggregate of 60 extracted human mandibular molars was gathered and the buccal surface of each specimen was exposed to 2 mm of enamel surface for bleaching with chemical and photoactivated agents with the use of reversal solutions. Specimens were divided into six groups (n = 10) at random- Group 1: samples bleached with 40% HP with 10% ascorbic acid (reversal agent), group 2: ZP activated by PDT with 10% ascorbic acid (reversal agent), group 3: 40% HP with 6% cranberry solution as a reversal agent, group 4: ZP activated by PDT with 6% cranberry solution, group 5: 40% HP and group 6: ZP activated by PDT with no reversal agents. Resin cement restoration was performed via etch and rinse technique and SBS was estimated by using the universal testing machine, SMH by using Vickers hardness tester, and Ra by stylus profilometer. Statistical analysis was executed using the ANOVA test and the Tukey multiple tests (p<0.05). RESULTS Enamel surface bleached with 40% HP reversed with 10% ascorbic acid displayed the highest SBS while 40% HP with no reversal agent use showed the least SBS. For SMH, ZP activated by PDT when applied on the enamel surface and reversed with 10% ascorbic acid showed the highest SMH while when bleached with 40% HP and reversed with 6% cranberry solution showed the least SMH value. For Ra, Group 3: samples bleached with 40% HP with 6% cranberry solution as reversal agent showed the highest Ra value while bleaching of enamel surface with ZP activated by PDT with 6% cranberry displayed the least Ra value. CONCLUSION Bleached enamel surface with Zinc Phthalocyanine activated by PDT with the application of 10% ascorbic acid as reversal solution has demonstrated the highest SBS and SMH with acceptable surface roughness for bonding adhesive resin to the enamel surface.
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Affiliation(s)
- Amer M Alanazi
- Pharmaceutical Biotechnology Laboratory, Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia.
| | - Azmat Ali Khan
- Pharmaceutical Biotechnology Laboratory, Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia.
| | - Amer Mahmood
- Stem cell unit department of Anatomy College of Medicine King Saud University, Saudi Arabia.
| | - Araib Tahir
- Senior Registrar in Liaquat College of Medicine and Dentistry, Pakistan.
| | - Mohammad Amjad Kamal
- Institutes for Systems Genetics, Frontiers Science Center for Disease-related Molecular Network, West China Hospital, Sichuan University, China and Enzymoics, Novel Global Community Educational Foundation, 7 Peterlee Place, Hebersham, NSW 2770, Australia.
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Zaki SS, Ghorab SM, Shamaa MS. Antioxidant effect on shear bond strength of orthodontic brackets after tooth bleaching: A scoping review of in vitro studies. Int Orthod 2023; 21:100777. [PMID: 37257393 DOI: 10.1016/j.ortho.2023.100777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2023] [Revised: 05/12/2023] [Accepted: 05/13/2023] [Indexed: 06/02/2023]
Abstract
INTRODUCTION Tooth bleaching was reported to decrease bond strength of orthodontic brackets. The antioxidant application was investigated to reverse the bleaching effect for immediate bracket bonding. This scoping review of in vitro studies is to assess systematically the effect of antioxidant application on shear bond strength (SBS) before orthodontic bracket bonding after tooth bleaching. MATERIALS AND METHODS This review was provided according to the Preferred reporting items for systematic reviews and meta-analyses extension for scoping reviews (PRISMA-ScR) guidelines. An electronic literature search was performed for full-text articles in English via Scopus, Web of Science, MEDLINE/PubMed, and Google Scholar databases from 2012 to May 9, 2023. RESULTS A total of 549 records were retrieved from the electronic search, and 361 after discarding duplicates. According to eligibility criteria, 23 records were included in this study. CONCLUSION Included studies revealed that antioxidants could increase the SBS of brackets after bleaching. However, there was controversiality whether SBS was just improved or restored to the unbleached level according to various factors, including the antioxidant type, concentration, application time, and form. Most studies reported that 10% sodium ascorbate (SA), ascorbic acid, green tea (GT), and tocopherol solutions restored SBS of metal brackets but not ceramic brackets. The result of 10% SA and GT gel was controversial. Lower concentrations than 10% was effective with pink bark, grape seed, quercetin flavonoid, and chamomile to restore SBS. The included studies revealed that retinol acetate, gooseberry, and dimethyl sulfoxide did not restore SBS.
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Affiliation(s)
- Shaimaa S Zaki
- Department of Orthodontics, Faculty of Dentistry, Mansoura University, Mansoura, Egypt.
| | - Sayed M Ghorab
- Department of Dental Biomaterials, Faculty of Dentistry, Mansoura University, Mansoura, Egypt
| | - Marwa S Shamaa
- Department of Orthodontics, Faculty of Dentistry, Mansoura University, Mansoura, Egypt
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Lin W, Gao Y, Chen S, Yang Y, Ye W, Tran D, Bergeron BE, Tay FR, Ma J. A facile method for rejuvenating the bonding efficacy of root canal sealer-smeared dentine. J Dent 2023; 136:104591. [PMID: 37356560 DOI: 10.1016/j.jdent.2023.104591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 06/12/2023] [Accepted: 06/14/2023] [Indexed: 06/27/2023] Open
Abstract
OBJECTIVES To examine the efficacy of glycine powder air-polishing on cleaning root canal sealer-smeared dentine. METHODS Dentine surfaces were contaminated with a smear of epoxy resin-based sealer or tricalcium silicate-based sealer. The contaminated surfaces were cleaned with saline, 75% ethanol, or air-polishing with glycine powder. Uncontaminated dentine was used as the control. The cleanliness of pulpal floor dentine was examined using scanning electron microscopy and energy dispersive X-ray analysis. The effectiveness of the three cleaning protocols was examined by testing the tensile bond strength of a self-etching adhesive to the decontaminated dentine. Resin infiltration into the dentinal tubules was identified using confocal laser scanning microscopy (CLSM). RESULTS Morphological examination and elemental analysis indicated that glycine powder air-polishing was more effective in removing the two sealers. Tensile bond strength of adhesive-bonded dentine was significantly reduced when either sealer was cleaned with saline or ethanol. Conversely, air-polishing restored the adhesive strength of the sealer-smeared dentine to the level of the control. Longer and denser resin tags were identified with CLSM when sealers were removed with air-polishing. CONCLUSIONS Air-polishing with glycine powder was effective in cleaning sealer-smeared dentine, as demonstrated by the rejuvenation of the tensile bond strength of a self-etching adhesive to the decontaminated dentine. CLINICAL SIGNIFICANCE Glycine powder air-polishing improves the cleanliness of root canal sealer-smeared dentine and rejuvenates adhesive bonding effectiveness.
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Affiliation(s)
- Wenqing Lin
- Department of Stomatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei Province, China
| | - Yuan Gao
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, Sichuan Province, China
| | - Surong Chen
- Department of Stomatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei Province, China
| | - Yan Yang
- Department of Stomatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei Province, China
| | - Weihu Ye
- Department of Stomatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei Province, China
| | - Diana Tran
- Department of Endodontics, Dental College of Georgia, Augusta University, Augusta, GA, USA
| | - Brian E Bergeron
- Department of Endodontics, Dental College of Georgia, Augusta University, Augusta, GA, USA
| | - Franklin R Tay
- Department of Endodontics, Dental College of Georgia, Augusta University, Augusta, GA, USA
| | - Jingzhi Ma
- Department of Stomatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, Hubei Province, China.
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Zhang H, Chen J, Wang Y, Yu Y, Zhao Y, Song J, Zhang Z. Fracture strength and bonding interface morphology of CAD/CAM-fabricated ceramic laminate veneers on bleached enamel treated with two different antioxidants. Dent Mater J 2023:2022-205. [PMID: 37302824 DOI: 10.4012/dmj.2022-205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
This study aimed to investigate the effects of two antioxidants and their application time on the fracture strength of computer-aided design and computer-aided manufacturing (CAD/CAM)-fabricated ceramic laminate veneers to bleached enamel, as well as their effects on the bonding interface micromorphology. Eight groups were set: Group NC (without bleaching and antioxidant treatment); Group NA (bleaching without antioxidant treatment); Group SA30, SA60, SA120 and Group PAC30, PAC60, PAC120 (bleaching and treating with sodium ascorbate or proanthocyanidins for 30, 60, and 120 min, respectively). After cementation of veneers, fracture strength values and failure modes were analyzed. The bonding interface morphology was observed by confocal laser scanning microscopy. The fracture strength was impaired when cementation procedure was performed immediately after bleaching. This reduction in fracture strength was reestablished with antioxidant treatment, and an extended treatment time contributed to better improvement. The resin tags at the bonding interfaces of the bleached enamel were impaired. Antioxidant treatments were able to reverse this unfavorable trend.
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Affiliation(s)
- Hong Zhang
- Department of Endodontics, Hospital of Stomatology, Jilin University
| | - Jiawen Chen
- Department of Endodontics, Hospital of Stomatology, Jilin University
| | - Ying Wang
- Department of Stomatology, Yangpu Hospital, School of Medicine, Tongji University
| | - Yiyan Yu
- Department of Endodontics, Hospital of Stomatology, Jilin University
| | - Yuanhang Zhao
- Department of Endodontics, Hospital of Stomatology, Jilin University
| | - Jiazhuo Song
- Department of Endodontics, Hospital of Stomatology, Jilin University
| | - Zhimin Zhang
- Department of Endodontics, Hospital of Stomatology, Jilin University
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Rasool N, Shetty SV, Nair PMS, Jayasheelan N, Kukkila J. Evaluation of the Effect of Different Antioxidants on Resin Bond Strength to Enamel after Bleaching: An In Vitro Study. J Contemp Dent Pract 2023; 24:320-324. [PMID: 38149810 DOI: 10.5005/jp-journals-10024-3502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2023]
Abstract
AIM To compare and evaluate the efficacy of 10% sodium ascorbate (SA) solution, 10% alpha-lipoic acid (ALA) solution, 10% propolis solutions (PLS), and 10% pomegranate peel extract (PPE) solution on the shear bond strength (SBS) between composite resin and bleached enamel after 60 minutes. MATERIALS AND METHODS Ninety extracted teeth were divided into 6 subgroups (n = 15) based on the antioxidant applied: Group I: Bleaching + application of 10% SA solution for 60 minutes. Group II: Bleaching + application of 10% ALA solution for 60 minutes. Group II: Bleaching + application of 10% PLS for 60 minutes. Group IV: Bleaching + application of 10% PPE solution for 60 min. Group V: Positive control (PC) bleaching without antioxidant application. Group VI: Negative control (NC) specimen neither subjected to bleaching nor application of an antioxidant solution. About 35% hydrogen peroxide (HP) was used for bleaching the labial surfaces in the groups considered. Labial surfaces were then bonded with composite using a customized cylindrical mold followed by storage in distilled water for 24 hours and shear bond strength was tested using universal testing machine. RESULTS The mean shear bond strength values for groups I, II, III, IV, V, and VI are 5.04, 2.29, 5.02, 4.07, 1.42, and 9.08 respectively. The peak shear bond strength value is obtained for the negative control group; whereas the lowest mean SBS value is obtained for the positive control group. CONCLUSION All herbal extracts used in the present study have demonstrated a reversal of reduced SBS between resin composite and bleached enamel surface. CLINICAL SIGNIFICANCE The reduction in bond strength of adhesive restorations was conventionally overcome by delaying the bonding procedure for a specified period resulting in prolonged treatment duration and multiple appointments. Sodium ascorbate is most commonly used but it is postulated to form a porous scaffold capable of harboring bacteria. Herbal antioxidants are gaining popularity in this regard as they are naturally derived, effective and affordable phytochemicals in addition to being viable alternatives against drug-resistant strains of microorganisms.
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Affiliation(s)
- Nadia Rasool
- Department of Conservative Dentistry and Endodontics, Yenepoya Dental College, Yenepoya (Deemed to be University), Mangaluru, Karnataka, India, Phone: +91 9906615511, e-mail:
| | - Satwady Vidhyadhara Shetty
- Department of Conservative Dentistry and Endodontics, Yenepoya Dental College, Yenepoya (Deemed to be University), Mangaluru, Karnataka, India
| | - Prathap Mulakkal Sreekantan Nair
- Department of Conservative Dentistry and Endodontics, Yenepoya Dental College, Yenepoya (Deemed to be University), Mangaluru, Karnataka, India
| | - Nishi Jayasheelan
- Department of Conservative Dentistry and Endodontics, Yenepoya Dental College, Yenepoya (Deemed to be University), Mangaluru, Karnataka, India
| | - Jayaprakash Kukkila
- Department of Dental Materials, Biomaterials and Research Center, Yenepoya Dental College, Yenepoya (Deemed to be University), Mangaluru, Karnataka, India
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9
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Zaki SS, Ghorab SM, Tawfik MA, Shamaa MS. Can antioxidant treatment replace delay in bracket bonding? An in vitro study. BMC Oral Health 2023; 23:197. [PMID: 37009877 PMCID: PMC10069133 DOI: 10.1186/s12903-023-02894-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Accepted: 03/17/2023] [Indexed: 04/04/2023] Open
Abstract
BACKGROUND Deterioration in shear bond strength has been reported after immediate bracket bonding following hydrogen peroxide bleaching. This study compared the effectiveness of three antioxidant agents, namely, alpha-tocopherol, green tea extract, and sodium ascorbate, in reversing the bleaching effect and as possible alternatives to delayed bonding. METHODS A total of 105 extracted human premolars were arbitrarily assigned to 7 groups (n = 15 each), including group 1 as the unbleached control group and six experimental groups, which were bleached with 40% hydrogen peroxide in three sessions of 15 min each. In experimental group 2, bonding was performed immediately after bleaching, whereas in groups 3 and 4, bonding was delayed for 1 and 2 weeks, respectively; meanwhile, the specimens were immersed in artificial saliva at 37 °C. Groups 5, 6, and 7 were treated immediately after bleaching with 10% of alpha-tocopherol, green tea extract, and sodium ascorbate solutions, respectively, for 15 min. Specimens were processed using 500 thermal cycles between 5 and 55 °C, with a dwell time of 30 s after 24 h of bracket bonding, and then tested for shear bond strength. The adhesive remnant index was examined to evaluate fracture mode. One-way analysis of variance, Kruskal-Wallis H, and post hoc Tukey's honestly significant difference tests were used to compare the data. Significant results were subjected to pairwise comparisons with Bonferroni's correction-adjusted of p values ≤ 0.050. RESULTS Shear bond strength was significantly lower (p < 0.001) in the immediate bonding and 1-week delay groups than in the control group. However, no significant difference was detected among the 2-week delay, antioxidant-treated, and control groups (p > 0.05). CONCLUSIONS Application of 10% alpha-tocopherol, green tea extract, or sodium ascorbate for 15 min could restore shear bond strength after 40% hydrogen peroxide bleaching as an alternative to delay in bracket bonding.
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Affiliation(s)
- Shaimaa S Zaki
- Department of Orthodontics, Faculty of Dentistry, Mansoura University, Mansoura, 35516, Mansoura, Egypt.
| | - Sayed M Ghorab
- Department of Dental Biomaterials, Faculty of Dentistry, Mansoura University, Mansoura, Egypt
| | - Marwa A Tawfik
- Department of Orthodontics, Faculty of Dentistry, Mansoura University, Mansoura, 35516, Mansoura, Egypt
| | - Marwa S Shamaa
- Department of Orthodontics, Faculty of Dentistry, Mansoura University, Mansoura, 35516, Mansoura, Egypt
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Haralur SB, Al-Ibrahim RM, Al-Shahrani FA, Al-Qahtani RA, Chaturvedi S, Alqahtani NM. Efficacy of organic and antioxidant agents to regain bond strength to bleached enamel in different dental adhesive solvents. J Appl Biomater Funct Mater 2023; 21:22808000231198807. [PMID: 38018370 DOI: 10.1177/22808000231198807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2023] Open
Abstract
Materials like carbamide peroxide or hydrogen peroxide are commonly used for vital teeth bleaching. However, there have been concerns regarding their effect on composite-to-bleached enamel bonding strength. The study investigated the impact of organic and antioxidant agents on composite bond strength in bleached enamel with different dental adhesive solvents. Human third molar teeth were sectioned into buccal and lingual halves. The two main adhesive solvent groups evaluated were acetone and alcohol. Each main group was divided into six groups. The positive control group received no bleaching, the negative control group consisted of bleaching with no surface deoxidization; and other experimental categories involved post-bleach treatments with 95% ethanol, sodium ascorbate (10%), acetone solution, or sodium fluoride solution (1.1%). Following the surface treatment and enamel bonding procedure, nano-hybrid composite cylinders measuring 3 × 2 mm were directly cured over the bleached enamel substrate. The shear bond test was performed after 24-h storage and 12,000 thermocycles on a universal testing machine. In this study, one-way ANOVA was used along with Tukey's HSD tests at a significance level of 0.05. The negative control groups showed significantly lower bond strength than the positive control group. Ethanol surface treatment had superior mean bonding strength in acetone and alcohol-based adhesive solvent groups. The utilization of sodium ascorbate for surface treatment resulted in a significant enhancement of adhesion between the composite material and bleached enamel surface. Sodium fluoride application showed no significant recovery in shear bond strength in both dental adhesive groups. It was concluded that hydrogen peroxide severely compromised the immediate bond strength of composite resin. Surface treatment of bleached enamel with ethanol, sodium ascorbate, and acetone solutions is an effective option for restoring bond strength.
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Affiliation(s)
- Satheesh B Haralur
- Department of Prosthodontics, College of Dentistry, King Khalid University, Abha, Saudi Arabia
| | | | | | | | - Saurabh Chaturvedi
- Department of Prosthodontics, College of Dentistry, King Khalid University, Abha, Saudi Arabia
| | - Naseer M Alqahtani
- Department of Prosthodontics, College of Dentistry, King Khalid University, Abha, Saudi Arabia
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11
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Yuan Y, Intajak P, Islam R, Ting S, Matsumoto M, Hoshika S, Sano H. Effect of sodium hypochlorite on bonding performance of universal adhesives to pulp chamber dentin. J Dent Sci 2022. [DOI: 10.1016/j.jds.2022.11.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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12
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Effect of Dentin-Disinfection Chemicals on Shear Bond Strength and Microhardness of Resin-Infiltrated Human Dentin in Different Adhesive Protocols. MEDICINA (KAUNAS, LITHUANIA) 2022; 58:medicina58091244. [PMID: 36143921 PMCID: PMC9501625 DOI: 10.3390/medicina58091244] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 08/25/2022] [Accepted: 09/03/2022] [Indexed: 11/17/2022]
Abstract
Background and Objectives: Bacteria and its remnants beneath the restorations predispose the tooth to secondary caries and pulpal pathology. Hence, various chemical antibacterial agents are suggested to disinfect the prepared tooth structure before the definitive restorative procedure. This study aimed to investigate the effects of chemical disinfectant solutions on the micro-shear bond strength (µSBS) and microhardness of total-etch and self-etch resin-infiltrated human dentin. Materials and Methods: 100 caries-free intact permanent third molar teeth were vertically sectioned into the buccal and lingual half. All these specimens were mounted on acrylic resin and underlying dentin surfaces were exposed by grinding. Samples were randomly divided into five groups [n = 20] following total-etch and self-etch adhesive protocol. Teeth samples were divided according to surface treatment, as Group I (Control-CNT), Group II (2% chlorhexidine-CHX), Group III (5.25% sodium hypochlorite-NaOCl), Group IV (17% ethylenediaminetetraacetate acid—EDTA) and Group V (10% povidone iodine-PVI). A randomly selected 10 samples from each subgroup were used for µSBS and microhardness tests. After surface treatment and bonding procedure, nono-hybrid composite cylinders with a 3-mm diameter and 2-mm height were directly cured over the dentin substrate. The samples for µSBS were subjected to 5000 thermocycles and tested using a universal testing machine. Microhardness was assessed using a micro-indenter instrument, data were statistically analyzed using a one-way analysis of variance and Tukey HSD tests at p < 0.05. Results: Amongst the chemical disinfectant assessed, 2% CHX did not affect µSBS and produced a marginal reduction in dentin microhardness compared to the control group. The 5.25% NaOCl and 17% EDTA significantly compromised the microhardness of the dentin substrate. Meanwhile, 10% PVI surface treatment resulted in a substantial reduction in µSBS between composite and dentin. Conclusions: CHX with preservation of bonding to dentin and insignificant negative effect on dentin microhardness is a safe option for tooth disinfection.
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H S Delgado A, Belmar Da Costa M, Polido MC, Mano Azul A, Sauro S. Collagen-depletion strategies in dentin as alternatives to the hybrid layer concept and their effect on bond strength: a systematic review. Sci Rep 2022; 12:13028. [PMID: 35906302 PMCID: PMC9338246 DOI: 10.1038/s41598-022-17371-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2022] [Accepted: 07/25/2022] [Indexed: 01/01/2023] Open
Abstract
Strategies aiming to improve the longevity of resin-dentin adhesive interface developed so far have only been able to retard the problem. Different approaches are thus needed. The objective of this review was to determine whether the use of collagen-depletion strategies after acid-etching procedures may improve the bond strength of resin-based materials to dentin. A systematic review was planned following 2021 PRISMA statement guidelines, with a search strategy performed in five electronic databases: PubMed/Medline, Scopus, EMBASE, SciELO and IADR Abstract Archive (last search: 17/01/2022). Inclusion criteria encompassed studies which evaluated a collagen-depletion strategy in acid-etched human dentin and tensile/shear bond strength tests. Risk of bias assessment was carried out by two reviewers, working independently on an adapted five-domain risk of bias (RoB) checklist for laboratory studies. Results were synthesized qualitatively, as a meta-analysis was not possible due to limited number of studies and their RoB. A total of eight studies were eligible for inclusion in the systematic review after inclusion/exclusion criteria application. Out of these, two evaluated the effect of using NaOCl followed by an antioxidant, and the remaining six evaluated different enzymatic treatments (bromelain, chondroitinase ABC, papain, and trypsin). None of the studies reported a decrease of bond strength when a collagen-depletion strategy was used, in comparison to traditional hybrid layers (control). All enzymatic treatment studies which respected the inclusion criteria improved the bond strength to dentin. Some specific collagen-depletion strategies seem to play a favorable role in improving immediate bond strengths to dentin. Further research with sound methodology is required to consolidate these findings, since limitations in RoB and a low number of studies were found. The assessment of further proteolytic agents and long-term outcomes is also required.
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Affiliation(s)
- António H S Delgado
- Centro de Investigação Interdisciplinar Egas Moniz (CiiEM), Instituto Universitário Egas Moniz (IUEM), Campus Universitário, Quinta da Granja, Monte de Caparica, 2829-511, Almada, Portugal. .,Division of Biomaterials and Tissue Engineering, UCL Eastman Dental Institute, University College London, London, UK.
| | - Madalena Belmar Da Costa
- Centro de Investigação Interdisciplinar Egas Moniz (CiiEM), Instituto Universitário Egas Moniz (IUEM), Campus Universitário, Quinta da Granja, Monte de Caparica, 2829-511, Almada, Portugal
| | - Mário Cruz Polido
- Centro de Investigação Interdisciplinar Egas Moniz (CiiEM), Instituto Universitário Egas Moniz (IUEM), Campus Universitário, Quinta da Granja, Monte de Caparica, 2829-511, Almada, Portugal
| | - Ana Mano Azul
- Centro de Investigação Interdisciplinar Egas Moniz (CiiEM), Instituto Universitário Egas Moniz (IUEM), Campus Universitário, Quinta da Granja, Monte de Caparica, 2829-511, Almada, Portugal
| | - Salvatore Sauro
- Dental Biomaterials and Minimally Invasive Dentistry, Department of Dentistry, Cardenal Herrera-CEU University, CEU Universities, Valencia, Spain
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Strazzi-Sahyon HB, da Silva LMAV, Briso ALF, Dos Santos PH. In vitro study on how antioxidant solutions affect enamel surface characteristics and bonding interface of ceramic laminate veneers luting after dental bleaching. J Mech Behav Biomed Mater 2022; 133:105322. [PMID: 35724532 DOI: 10.1016/j.jmbbm.2022.105322] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 06/06/2022] [Accepted: 06/13/2022] [Indexed: 10/18/2022]
Abstract
PURPOSE This in vitro study aimed to determine the effect of antioxidant solutions used after dental bleaching on the shear bond strength and adhesive interface sealing of ceramic laminate veneer luting. Additionally, effects on the enamel surface characteristics of hydrogen peroxide neutralization, surface energy, total free interaction energy, morphology, and chemical composition of enamel were assessed. MATERIAL AND METHODS Total 127 bovine incisors were divided into experimental groups, according to the surface treatment (unbleached and bleached enamel), antioxidant types (control; 10% ascorbic acid and 10% α-tocopherol), and periods of luting of ceramic laminates (24 h and after 14 days). Shear bond strength was assessed using microtensile test before and after thermal cycling (5760 cycles, 5-55 °C) (n = 6). The sealing of the adhesive interface was assessed using a confocal laser scanning microscope (n = 3). Hydrogen peroxide neutralization analysis was performed using a spectrophotometer (n = 5). The surface energy and total free interaction energy (n = 10) were measured using an automatic goniometer, while enamel morphology and chemical composition were assessed by scanning eletron microscopy (n = 3). Shear bond strength and enamel surface properties data were subjected to ANOVA followed by Tukey's test (α = 0.05). Adhesive interface micrographs were evaluated by the inter-examiner Kappa test and subjected to Kruskal-Wallis and Dunn's tests (α = 0.05). RESULTS In general, thermal aging decreased the shear bond strength values of the luting agents to enamel (P < .05). The α-tocopherol solution was able to reverse the oxidizing effect from dental bleaching, increasing the shear bond strength values and preserving the integrity of the adhesive interface sealing (P < .05). Moreover, the α-tocopherol antioxidant agent promoted higher hydrogen peroxide neutralization after dental bleaching (P < .05). Dental bleaching influenced the enamel surface, decreasing the surface energy and total free interaction energy values (P < .05). CONCLUSION α-tocopherol was able to reverse the oxidizing effects of dental bleaching, improving the enamel surface properties, as well as the adhesion and interface sealing of ceramic laminate veneer restorations.
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Affiliation(s)
- Henrico Badaoui Strazzi-Sahyon
- Department of Dental Materials and Prosthodontics, Araçatuba School of Dentistry, São Paulo State University, UNESP, Araçatuba, SP, Brazil.
| | - Livia Maria Alves Valentim da Silva
- Department of Preventive and Restorative Dentistry, Araçatuba School of Dentistry, São Paulo State University, UNESP, Araçatuba, SP, Brazil.
| | - André Luiz Fraga Briso
- Department of Preventive and Restorative Dentistry, Araçatuba School of Dentistry, Sao Paulo State University, UNESP, Araçatuba, SP, Brazil.
| | - Paulo Henrique Dos Santos
- Department of Dental Materials and Prosthodontics, Araçatuba School of Dentistry, São Paulo State University, UNESP, Araçatuba, SP, Brazil.
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15
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Sanon K, Tichy A, Hatayama T, Thanatvarakorn O, Prasansuttiporn T, Wada T, Shimada Y, Hosaka K, Nakajima M. Addition of metal chlorides to a HOCl conditioner can enhance bond strength to smear layer deproteinized dentin. Dent Mater 2022; 38:1235-1247. [PMID: 35715250 DOI: 10.1016/j.dental.2022.06.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2022] [Revised: 05/02/2022] [Accepted: 06/05/2022] [Indexed: 11/18/2022]
Abstract
OBJECTIVES To evaluate the effect of smear layer deproteinization using hypochlorous acid (HOCl) with/without metal chlorides (SrCl2 and ZnCl2) on the microtensile bond strength (µTBS) of two simplified adhesives to dentin. METHODS Human dentin surfaces with a standardized smear layer were pretreated using a 105 ppm HOCl solution with/without SrCl2 (0.05 M, 0.1 M, 0.2 M, 0.4 M) or ZnCl2 (0.05 M, 0.1 M, 0.2 M) for 5 s, 15 s, or 30 s. After the deproteinizing solution was washed out with water for 5 s, 15 s, or 30 s, pretreated surfaces were bonded with one-step self-etch adhesive Bond Force II or universal adhesive Clearfil Universal Bond Quick, and µTBS was measured after 24 h. Additionally, the deproteinizing effects of HOCl solutions with/without the metal chlorides were compared by measuring changes in the amide:phosphate ratio using attenuated total reflection Fourier transform infrared spectroscopy. Statistical analysis was performed using multifactor ANOVA, Tukey's post hoc tests and t-tests (p < 0.05). RESULTS Pretreatment with pure HOCl for 15 s and 30 s significantly decreased the amide:phosphate ratio (p < 0.05), indicating effective deproteinization, but the µTBS of both adhesives increased significantly only if HOCl was washed out for 30 s (p < 0.05). Increasing the concentrations of metal chlorides enabled shortening of the wash-out time down to 5 s while maintaining the improved µTBS (p < 0.05). The deproteinizing effect of HOCl was not significantly altered by the addition of metal chlorides (p > 0.05). SIGNIFICANCE The effectiveness of smear layer deproteinization using HOCl can be improved by the addition of metal chlorides, as their increasing concentration allowed to shorten the wash-out time from 30 s down to 5 s.
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Affiliation(s)
- Kittisak Sanon
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, Tokyo 113-8549, Japan; Department of Operative Dentistry, Faculty of Dentistry, Chulalongkorn University, 34 Henri Dunant Road, Pathumwan, Bangkok 10330, Thailand
| | - Antonin Tichy
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, Tokyo 113-8549, Japan; Institute of Dental Medicine, First Faculty of Medicine of the Charles University and General University Hospital in Prague, Karlovo namesti 32, Prague 121 11, Czech Republic
| | - Takashi Hatayama
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, Tokyo 113-8549, Japan
| | - Ornnicha Thanatvarakorn
- Faculty of Dentistry, Bangkokthonburi University, 16/10 Leab Klong Taweewatana Rd., Taweewatana, Bangkok 10170, Thailand
| | - Taweesak Prasansuttiporn
- Department of Restorative Dentistry and Periodontology, Faculty of Dentistry, Chiang Mai University, Suthep, Muang Chiang Mai, Chiang Mai 50200, Thailand; Center of Excellence in Materials Science and Technology, Chiang Mai University, Suthep, Muang Chiang Mai, Chiang Mai 50200, Thailand
| | - Takahiro Wada
- Department of Advanced Biomaterials, Graduate School of Medical and Dental Sciences, Medical and Dental Science and Technology, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, Tokyo 113-8549, Japan
| | - Yasushi Shimada
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, Tokyo 113-8549, Japan
| | - Keiichi Hosaka
- Department of Regenerative Dental Medicine, Tokushima University Graduate School of Biomedical Sciences, 3-18-15 Kuramotocho, Tokushima 770-8504, Japan
| | - Masatoshi Nakajima
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45, Yushima, Bunkyo-ku, Tokyo 113-8549, Japan; Department of Regenerative Dental Medicine, Tokushima University Graduate School of Biomedical Sciences, 3-18-15 Kuramotocho, Tokushima 770-8504, Japan.
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Sadikoglu IS, Arici M, Kemaloglu H, Turkun M, Caymaz MG. Can the hydrogel form of sodium ascorbate be used to reverse compromised resin infiltrant penetration after bleaching? Niger J Clin Pract 2022; 25:509-515. [PMID: 35439912 DOI: 10.4103/njcp.njcp_1805_21] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Aims The aim of this study was to investigate the effects of an antioxidant on the bleaching-induced reduction in the penetration depth of infiltrant resins. Materials and Methods White spot lesions (WSLs) were created on 105 bovine tooth samples, each measuring 6 × 4 × 4 mm. Five samples were randomly selected for the examination of lesion characteristics. The remaining 100 samples were then divided into four groups (n = 25). In Group I, the WSLs were treated with resin infiltration (RI) only. RI was performed on Group II immediately after bleaching. In Group III, an antioxidant was applied for 2 h after bleaching, and this was immediately followed by RI. The Group IV samples were treated with RI at the end of a 1-week waiting period after bleaching. The penetration depths were evaluated through confocal laser scanning microscopy. Results The lowest penetration rate, which was approximately 57%, was observed in Group II. This was followed by Group III (87%), Group IV (90%), and Group I (92%). Group II, in which the samples were infiltrated immediately after bleaching, had the lowest mean penetration percentage. All the bleached groups exhibited significantly lower penetration percentages than the nonbleached group (Group I) (P < 0.05). Antioxidant application increased the penetration significantly (P < 0.05). Conclusion Application of sodium ascorbate was found to reverse the reduced resin penetration depth and penetration percentages resulting from bleaching. The postponement of adhesive procedures after bleaching yielded similar results.
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Affiliation(s)
- I S Sadikoglu
- Department of Restorative Dentistry, European University of Lefke Faculty of Dentistry, Lefke, Mersin-10, Turkey
| | - M Arici
- Pharmaceutic Technology Department, Ege University Faculty of Pharmacy, İzmir, Turkey
| | - H Kemaloglu
- Department of Restorative Dentistry, Ege University Faculty of Dentistry, İzmir, Turkey
| | - M Turkun
- Department of Restorative Dentistry, Ege University Faculty of Dentistry, İzmir, Turkey
| | - M G Caymaz
- Department of Oral and Maxillofacial Surgery, Cyprus Health and Social Sciences University, Faculty of Dentistry, Morphou, Mersin-10, Turkey
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Radicular canal disinfection using Photodynamic therapy and Sodium Hypochlorite following three chelating agents’ green tea extract, grape extract, and Ethylenediaminetetraacetic acid on the push-out bond strength of epoxy resin-based sealer. Photodiagnosis Photodyn Ther 2022; 38:102809. [DOI: 10.1016/j.pdpdt.2022.102809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 03/08/2022] [Accepted: 03/10/2022] [Indexed: 11/23/2022]
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Effect of an Intraorifice Barrier on Endodontically Treated Teeth: A Systematic Review and Meta-Analysis of In Vitro Studies. BIOMED RESEARCH INTERNATIONAL 2022; 2022:2789073. [PMID: 35097115 PMCID: PMC8794661 DOI: 10.1155/2022/2789073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Accepted: 12/31/2021] [Indexed: 12/01/2022]
Abstract
The main cause of unsuccess in endodontically treated teeth (ETT) is due to bacterial recontamination. The placement of an intraorifice barrier (IOB) has been proposed for preventing this event in cases that the restoration is in an inadequate condition, enhancing the possibilities for predictable long-term success in endodontic therapy. Objectives. To evaluate through a systematic review and meta-analysis if it would be necessary to place an IOB in ETT. Materials and Methods. The present review is in accordance with the PRISMA 2020 Statement and is registered in the Open Science Framework. Two blinded reviewers carried out a comprehensive search in four databases up to July 10th, 2021: MEDLINE, Scopus, Embase, and Web of Science. Eligible studies were the ones which evaluated the use of an IOB in ETT in reducing microleakage with any material of choice and with any methods employed. Only in vitro studies published in English were included. Results. A total of thirty in vitro studies were included in the qualitative synthesis, and seven of those were included in the quantitative analyses evaluating the following materials: bioceramic cement, glass-ionomer cement (GIC), and resin-based composite (RBC). Most of the included studies placed an IOB at a 3 mm depth. Reduction in microleakage was observed when an IOB was placed, regardless of the material employed (p ≤ 0.01). Among the materials, GIC and RBC performed similarly (p > 0.05), with the bioceramic subgroup being statistically superior to the GIC subgroup (p ≤ 0.05). Conclusions. Although well-designed randomized clinical trials are required, the placement of an intraorifice barrier can significantly reduce microleakage in endodontically treated teeth, and the use of bioceramics as IOB seems to be the best available material for this purpose.
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SANON K, HATAYAMA T, TICHY A, THANATVARAKORN O, PRASANSUTTIPORN T, WADA T, IKEDA M, HOSAKA K, NAKAJIMA M. Smear layer deproteinization with NaOCl and HOCl: Do application/wash-out times affect dentin bonding of one-step self-etch adhesives? Dent Mater J 2022; 41:353-362. [DOI: 10.4012/dmj.2021-208] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Kittisak SANON
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
| | - Takashi HATAYAMA
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
| | - Antonin TICHY
- Institute of Dental Medicine, First Faculty of Medicine of the Charles University and General University Hospital in Prague
| | | | - Taweesak PRASANSUTTIPORN
- Department of Restorative Dentistry and Periodontology, Faculty of Dentistry, Chiangmai University
| | - Takahiro WADA
- Department of Advanced Biomaterials, Graduate School of Medical and Dental Sciences, Medical and Dental Science and Technology, Tokyo Medical and Dental University
| | - Masaomi IKEDA
- Department of Oral Prosthetic Engineering, Graduate School of Medical and Dental Sciences, Medical and Dental Science and Technology, Tokyo Medical and Dental University
| | - Keiichi HOSAKA
- Department of Regenerative Dental Medicine, Tokushima University Graduate School of Biomedical Sciences
| | - Masatoshi NAKAJIMA
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
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Navjot SM, Ashu J, Kamalpreet K, Navneet KM, Manu R, Divya B. The effect of natural reducing agents on push-out bond strength of AH plus and BioRoot RCS to sodium hypochlorite treated root dentin. J Conserv Dent 2021; 24:130-134. [PMID: 34759577 PMCID: PMC8562831 DOI: 10.4103/jcd.jcd_52_21] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 02/04/2021] [Accepted: 03/23/2021] [Indexed: 11/09/2022] Open
Abstract
Aims: To evaluate the effect of natural anticoagulants 6.5% proanthocyanidin (PA) and 25% bamboo salt on push-out bond strength (PBS) of AH Plus and BioRoot RCS to dentin. Subjects and Methods: 30 single-rooted extracted human teeth were collected. After establishing the working length samples were prepared up to size F3. 5 ml of 3% NaOCl was used as irrigant during instrumentation followed by rinse with 5 ml of 17% ethylenediaminetetraacetic acid. Samples were randomly divided into groups based on the final irrigation solution: Group I – AH plus sealer group, Ia – Saline group, Ib – PA group, Ic – Bamboo salt (BS) group. Group II – BioRoot RCS group, IIa – Saline group, IIb – PA group, IIc – BS group. After obturation, samples were embedded in self-cure acrylic resin and 2 mm thick root slices were made at coronal middle and apical 3rd. These slices were subjected to PBS testing followed by stereomicroscopic examination for checking the mode of failure. Statistical Analysis Used: Kruskal–Wallis and Dunn's post hoc test. Results: 3% NaOCl significantly decreased the bond strength of AH Plus as compared to BioRoot RCS to dentin (P < 0.05). Both PA and BS were capable of increasing the PBS of AH Plus and BioRoot RCS to NaOCl-treated dentin. Conclusions: Final irrigation with antioxidants such as PA and BS eliminates the risk of reduced bond strength of sealer to root canal walls, which ensues following the use of NaOCl as an irrigant.
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Affiliation(s)
- S Mann Navjot
- Professor and Head, Department of Conservative Dentistry and Endodontics, National Dental College and Hospital, Punjab, India
| | - Jhamb Ashu
- Reader, Department of Conservative Dentistry and Endodontics, National Dental College and Hospital, Punjab, India
| | - Kaur Kamalpreet
- PG Student, Department of Conservative Dentistry and Endodontics, National Dental College and Hospital, Punjab, India
| | - K Mann Navneet
- Reader, Department of Prosthodontics, National Dental College and Hospital, Punjab, India
| | - Rana Manu
- Reader, Department of Conservative Dentistry and Endodontics, National Dental College and Hospital, Punjab, India
| | - Batra Divya
- Senior Lecturer, Department of Conservative Dentistry and Endodontics, National Dental College and Hospital, Punjab, India
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Sodium p-Toluenesulfinate Enhances the Bonding Durability of Universal Adhesives on Deproteinized Eroded Dentin. Polymers (Basel) 2021; 13:polym13223901. [PMID: 34833205 PMCID: PMC8623448 DOI: 10.3390/polym13223901] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 11/05/2021] [Accepted: 11/08/2021] [Indexed: 11/26/2022] Open
Abstract
The effects of deproteinization using sodium hypochlorite (NaOCl) and the subsequent application of an antioxidant (sodium p-toluenesulfinate, STS) onto the bonding durability of universal adhesives on eroded dentin were investigated. Untreated sound dentin served as the control, whereas eroded dentin, which had been prepared by pH-cycling in 1% citric acid and a remineralization solution, was either untreated, deproteinized with a 10% NaOCl gel or deproteinized with the 10% NaOCl gel and subsequently treated with an STS-containing agent. The dentin surfaces were bonded using a universal adhesive (Clearfil Universal Bond Quick, Scotchbond Universal or G-Premio Bond), and the micro-tensile bond strength (µTBS) test was performed after 24 h or 10,000 thermal cycles. The µTBS data were statistically analyzed using a three-way ANOVA and Tukey’s HSD post hoc tests. The lowest µTBS was measured on untreated eroded dentin (p < 0.001). Deproteinization of eroded dentin resulted in µTBS similar to untreated sound dentin (p > 0.05), but the highest µTBS was obtained if deproteinization was followed by the application of STS. Thermocycling significantly decreased µTBS in all groups (p < 0.001), except for STS-treated deproteinized eroded dentin (p > 0.05). This indicated that deproteinization, followed by the application of STS, could enhance the bonding durability of universal adhesives on eroded dentin.
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Afkhami F, Sadegh M, Sooratgar A, Amirmoezi M. Comparison of the effect of QMix and conventional root canal irrigants on push-out bond strength of fiber post to root dentin. Clin Exp Dent Res 2021; 8:464-469. [PMID: 34664421 PMCID: PMC8874043 DOI: 10.1002/cre2.500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Revised: 08/29/2021] [Accepted: 09/05/2021] [Indexed: 11/17/2022] Open
Abstract
Objectives This study aimed to assess the effect of application of QMix and common root canal irrigating solutions on the bond strength of fiber post to root dentin. Material and Methods In this in‐vitro study, 60 extracted incisor teeth were decoronated such that 15 mm of root length remained. The canals were prepared with ProTaper rotary system to F5 and filled with gutta‐percha and AH26 sealer. Prior to post placement, the teeth were divided into four groups based on the type of final irrigating solution namely saline, 5.25% NaOCl, 2% chlorhexidine, and QMix. The fiber posts were then cemented with Panavia F2 resin cement. The roots were sectioned perpendicular to their longitudinal axis, and four sections with 1 mm thickness were made at the middle and coronal thirds of the roots. The push‐out bond strength of fiber posts was measured by a universal testing machine in megapascals. Data were analyzed by two‐way ANOVA and Tukey's test. Results The maximum and minimum bond strength values were noted in QMix and NaOCl groups in both the middle and coronal third of the root, respectively. But, there was no significant difference between the push‐out bond strength in the middle or coronal third of the root (p = 0.054). Adhesive failure was the most common mode of failure in all groups. Conclusion Use of QMix for post space irrigation does not compromise the bond strength of fiber post to root dentin, and can be used for final rinsing of the post space.
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Affiliation(s)
- Farzaneh Afkhami
- Department of Endodontics, School of Dentistry, Tehran University of Medical Sciences, International Campus, Tehran, Iran
| | - Mona Sadegh
- Endodontist, Private Practice, Vancouver, British Columbia, Canada
| | - Aidin Sooratgar
- Department of Endodontics, School of Dentistry, Tehran University of Medical Sciences, International Campus, Tehran, Iran
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Kurklu ZGB. Effect of Antioxidant and Buffering Agent Mixture on Dentin Shear Bond Strengths of Laminate Veneer and pH Change of External Medium After Intracoronal Bleaching. JOURNAL OF ADVANCED ORAL RESEARCH 2021. [DOI: 10.1177/23202068211039711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Aim: To investigate the effect of sodium ascorbate (SA), an antioxidant and calcium hydroxide (Ca(OH)2), a buffering agent mixture, on the shear bond strength of a luting resin to dentin, and pH changes of the extraradicular medium solution after intracoronal bleaching with hydrogen peroxide. Materials and Methods: In this in vitro study, 60 human maxillary central incisors were randomly assigned into six groups ( n: 10): Group 1: restored, no bleach; group 2: bleached, bonded immediately; group 3: bleached, treated with 10% SA applications before bonding; group 4: bleached, treated with calcium hydroxide applications before bonding; group 5: bleached, treated with CaOH2 and SA mixture applications before bonding; group 6: delay bonding by seven days. For bleach treatment in groups 2 to 6, intracoronal bleaching was performed with 35% hydrogen peroxide for four days. SA or CaOH2 or mixture of SA and CaOH2 were left in the access cavity for four days. Hybrid blocks, 4 mm × 4 mm wide × 2–mm thick, were luted with resin cements on dentin surface and then the specimens were subjected to shear bond strength testing. Analysis of variance and Tukey post hoc multiple comparison tests were applied ( P < .05). Results: G2 and G4 showed significantly low bond strength values and they were lower than the other groups ( P < .05). There were no significant differences between G1, G3, and G6 ( P > .05). The pH values had risen markedly in the groups containing calcium hydroxide (G4 and G5) after four days ( P < .05). Conclusion: The application of 10% SA or 10% SA and CaOH2 mixture were effective at reversing bleaching effects on bond strength. CaOH2 or CaOH2 and 10% SA mixture increased the external medium pH and were effective for alkalinization after intracoronal bleaching.
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Kalay TS, Kara Y, Karaoglu SA, Kolaylı S. Evaluation of Stabilized Chlorine Dioxide in Terms of Antimicrobial Activity and Dentin Bond Strength. Comb Chem High Throughput Screen 2021; 25:1427-1436. [PMID: 34397326 DOI: 10.2174/1386207324666210816121255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 03/30/2021] [Accepted: 04/12/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND Antimicrobial agents are recommended for disinfection of the cavity following mechanical dental caries removal prior to application of restorative material. There is limited information about stabilized chlorine dioxide (ClO2) as a cavity disinfectant. OBJECTIVE The objective of this study is to determine the antimicrobial activity and effect on dentin bond strength of ClO2 compared to chlorhexidine digluconate (CHX), sodium hypochlorite (NaOCl) and ethanolic propolis extract (EPE). METHODS Antimicrobial activities of agents against oral pathogens (Staphylococcus aureus, Enterococcus faecalis, Streptococcus mutans, Lactobacillus acidophilus, Lactobacillus casei, Candida albicans, and Saccharomyces cerevisiae) and analyses of EPE were examined. Seventy-five mandibular third molars were sectioned, prepared and divided into five subgroups (n=15/group). Cavity disinfectants (2% CHX, 2.5% NaOCl, 30% EPE, 0.3% ClO2) were applied to etched dentin prior to adhesive and composite build-up. Shear bond strength (SBS) was evaluated with a universal testing machine at a crosshead speed of 0.5 mm/min. The SBS data were analyzed with one-way analysis of variance (ANOVA) and Tukey's post-hoc test (p <0.05). The failure modes were evaluated with a stereomicroscope. RESULTS It was determined that the compared disinfectants were showed different inhibition zone values against oral pathogens. ClO2 exhibited the highest antimicrobial activity, followed by CHX, NaOCI and EPE, respectively. No statistically significant difference was observed in the SBS values between the disinfectant treated groups and control group. The failure modes were predominantly mixed. CONCLUSION The use of 0.3% stabilized ClO2 as a cavity disinfectant agent exhibited high antimicrobial activity against oral pathogens and no adverse effects on SBS to etched dentin.
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Affiliation(s)
- Tugba Serin Kalay
- Department of Restorative Dentistry, Faculty of Dentistry, Karadeniz Technical University, Trabzon, Turkey
| | - Yakup Kara
- Department of Chemistry, Faculty of Sciences, Karadeniz Technical University, Trabzon, Turkey
| | - Sengul Alpay Karaoglu
- Department of Biology, Faculty of Arts and Science, Recep Tayyip Erdogan University, Rize, Turkey
| | - Sevgi Kolaylı
- Department of Chemistry, Faculty of Sciences, Karadeniz Technical University, Trabzon, Turkey
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Fluorescence characteristics of E. faecalis in dentine following treatment with oxidizing endodontic irrigants. Photodiagnosis Photodyn Ther 2021; 35:102344. [PMID: 34033937 DOI: 10.1016/j.pdpdt.2021.102344] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 04/08/2021] [Accepted: 05/17/2021] [Indexed: 11/21/2022]
Abstract
INTRODUCTION This study aimed to assess changes in the fluorescence characteristics of Enterococcus faecalis in human dentine over a period of 24 h following treatment with endodontic irrigants. METHOD Sterilised, non-functional extracted third molars were embedded in acrylic resin and uniformly sectioned into 2 mm thick dentine sections. After the removal of smear layer, the dentine sections were inoculated with E. faecalis and cultured for 7 days. The infected dentine sections were subsequently treated with different concentrations of sodium hypochlorite (NaOCl) and hydrogen peroxide (H2O2). Bacterial fluorescence readings were assessed at different time points using a calibrated laser device. All data were assessed for normality (Kolmogorov Smirnoff test) and analysed using ANOVA with Bonferroni post-hoc tests. RESULTS Fluorescence readings were quenched when E. faecalis infected human dentine sections were treated with oxidizing irrigants in vitro. Throughout a 24-hour period, fluorescence recovered in part but did not return to baseline level. CONCLUSION The fluorescence quenching effect of these oxidizing agents needs to be considered when using laser fluorescence in assessing the quality of root canal debridement or disinfection.
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Baraba A, Cimic S, Basso M, Ionescu AC, Brambilla E, Miletić I. Microtensile Bond Strength of Fiber-Reinforced and Particulate Filler Composite to Coronal and Pulp Chamber Floor Dentin. MATERIALS (BASEL, SWITZERLAND) 2021; 14:2400. [PMID: 34063026 PMCID: PMC8124664 DOI: 10.3390/ma14092400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 04/15/2021] [Accepted: 04/30/2021] [Indexed: 11/16/2022]
Abstract
This ex vivo study aimed to compare the microtensile bond strength of fiber-reinforced and particulate filler composite to coronal and pulp chamber floor dentin using a self-etching adhesive system. Coronal dentin of 40 human molar teeth was exposed by cutting occlusal enamel with a low-speed saw. Teeth were then randomly divided into two groups (n = 20). The first group was left as is, while in the second group, pulp chamber floor dentin was exposed by trepanation. After placement of a self-etching adhesive system (G-aenial Bond, GC, Tokyo, Japan), groups were further divided into two sub-groups (n = 10) according to the type of composite: fiber-reinforced composite (EP, everX Posterior, GC, Tokyo, Japan) and particulate filler composite (GP, G-aenial Posterior, GC, Tokyo, Japan). Then, composite blocks were built up. Sticks (1.0 × 1.0 mm2) were obtained from each specimen by sectioning, then microtensile bond strength (μTBS) test was performed. Statistical analysis included one-way ANOVA test and Student's t-test (p < 0.05). μTBS values were 22.91 ± 14.66 and 24.44 ± 13.72 MPa on coronal dentin, 14.00 ± 5.83 and 12.10 ± 8.89 MPa on pulp chamber floor dentin for EP and GP, respectively. Coronal dentin yielded significantly higher μTBS than pulp chamber floor dentin (p < 0.05), independently from the tested composites.
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Affiliation(s)
- Anja Baraba
- Department of Endodontics and Restorative Dentistry, School of Dental Medicine, Gunduliceva 5, 10 000 Zagreb, Croatia;
| | - Samir Cimic
- Department of Removable Prosthodontics, School of Dental Medicine, Gunduliceva 5, 10 000 Zagreb, Croatia;
| | - Matteo Basso
- Department of Dentistry, Galeazzi Institute, University of Milan, via R. Galeazzi 4, 20161 Milan, Italy;
| | - Andrei C. Ionescu
- Department of Biomedical, Surgical and Dental Sciences, Oral Microbiology and Biomaterials Laboratory, University of Milan, via Pascal, 36, 20133 Milan, Italy; (A.C.I.); (E.B.)
| | - Eugenio Brambilla
- Department of Biomedical, Surgical and Dental Sciences, Oral Microbiology and Biomaterials Laboratory, University of Milan, via Pascal, 36, 20133 Milan, Italy; (A.C.I.); (E.B.)
| | - Ivana Miletić
- Department of Endodontics and Restorative Dentistry, School of Dental Medicine, Gunduliceva 5, 10 000 Zagreb, Croatia;
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Paken G, Çömlekoğlu ME, Sonugelen M. Detection of the hybrid layer biodegradation initiation factor with a scanning electron microscope. Microsc Res Tech 2021; 84:2166-2175. [PMID: 33931911 DOI: 10.1002/jemt.23771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Revised: 01/28/2021] [Accepted: 03/25/2021] [Indexed: 11/08/2022]
Abstract
The purpose of this study was to elucidate the origin of initiation of hybrid layer biodegradation. Ninety caries-free human third molars were divided into three surface groups: enamel, dentin, and NaOCl-treated dentin. (n = 30/group) Each group was divided into three subgroups (n = 10/group) of luting resin materials with etch-and-rinse; self-etch and self-adhesive systems. Resin composite blocks and sticks were fabricated and adhered onto dentin and enamel surfaces. The bond strength values were evaluated with micro shear test and statistical analysis were made. On the other hand, teeth were sectioned with a slow-speed saw into multiple beams. After thermocycling, samples were kept in 50% silver nitrate solution. Samples were analyzed with SEM in back-scattered mode. According to the micro-shear bond tests, higher bond strength values were observed in etch-and-rinse system. Bond strength values in self-adhesive and etch-and-rinse groups were significantly higher than self-etch groups in dentin surface and dentin surface treatment with NaOCl. Back-scattered scanning electron microscope results showed that, different degradation mechanism was observed. The present study indicates that, due to the acid etching in dentin, collagen biodegradation was observed within the hybrid layer. On the enamel surfaces, resin degradation was related with resin monomers in adhesive systems.
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Affiliation(s)
- Gamze Paken
- Department of Prosthodontics, School of Dentistry, Usak University, Usak, Turkey
| | | | - Mehmet Sonugelen
- Department of Prosthodontics, School of Dentistry, Ege University, Izmir, Turkey
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Kusumasari C, Abdou A, Nakajima M, Tagami J. Deproteinization of caries-affected dentin with chemo-mechanical caries removal agents and its effect on dentin bonding with self-etch adhesives. J Dent 2021; 109:103665. [PMID: 33864887 DOI: 10.1016/j.jdent.2021.103665] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 04/07/2021] [Accepted: 04/12/2021] [Indexed: 02/02/2023] Open
Abstract
OBJECTIVES To evaluate the micro-tensile bond strength (μTBS) of self-etch adhesives (SEA) to normal and caries-affected dentin after smear layer deproteinization with papain enzyme-based and NaOCl-based chemo-mechanical caries removal agents (CRAs) and to compare their efficacy to a 6 % NaOCl solution. METHODS Forty extracted human molars with occlusal carious lesions were randomly divided into four pretreatment groups: no treatment (control), Papacarie for 60 s, Carisolv for 60 s, and 6 % NaOCl for 15 s. After pretreatment, Universal Bond Quick ER (UBQ, one-step, 1-SEA) or Clearfil SE Bond 2 (CSE, two-step, 2-SEA) was applied to the pre-treated surface, and built-up with resin composite (Clearfil AP-X). The μTBS test was performed after 24 h water storage of the specimens at 37 °C, and the modes of failure were determined under SEM. Deproteinizing effects of the tested agents on smear layer-covered dentin was quantified by changes in the amide:phosphate ratio using attenuated total reflectance Fourier-transform infrared spectroscopy (ATR-FTIR) analysis. RESULTS On caries-affected dentin the μTBS improved significantly after pretreatment with Papacarie, Carisolv, and 6 % NaOCl with both SEAs (p < 0.05). Papacarie pretreatment significantly improved the μTBS of UBQ on normal dentin compared to NaOCl pretreatment (p < 0.05). ATR-FTIR revealed that all agents significantly decreased the amide:phosphate ratio on the smear layer-covered normal and caries-affected dentin (p < 0.05). CONCLUSIONS Smear layer deproteinizing with papain enzyme-based and NaOCl-based gel CRAs was effective in improving the micro-tensile bond strength of self-etch adhesives to caries-affected dentin. CLINICAL SIGNIFICANCE Smear layer deproteinization with Papacarie (a papain enzyme-based gel) or Carisolv (a NaOCl-based gel) can improve the μTBS to normal and caries-affected dentin bonded with 2-step self-etch adhesives.
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Affiliation(s)
- Citra Kusumasari
- Department of Conservative Dentistry, Faculty of Dentistry, University of Indonesia, Jakarta, Indonesia; Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Ahmed Abdou
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan; Biomaterials Department, Faculty of Dentistry, Modern University for Technology and Information, Cairo, Egypt.
| | - Masatoshi Nakajima
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Junji Tagami
- Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
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Olmedo DERP, Kury M, Resende BA, Cavalli V. Use of antioxidants to restore bond strength after tooth bleaching with peroxides. Eur J Oral Sci 2021; 129:e12773. [PMID: 33724583 DOI: 10.1111/eos.12773] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 11/09/2020] [Accepted: 01/14/2021] [Indexed: 11/29/2022]
Abstract
This review compiles the literature on the antioxidants used after tooth bleaching with either low or high-concentrated carbamide and hydrogen peroxide to recover the bond strength. Antioxidants used in bleached teeth are mainly natural and non-enzymatic, except for catalase. Commonly, antioxidants are applied to remove any reactive oxygen species (ROS) residues left from bleaching gels, which adversely affect adhesive procedures, such as restorations or orthodontic brackets bonding. Even though sodium ascorbate, the most thoroughly investigated antioxidant, showed the most efficient bond strength recovery at 10% concentration, its performance depends on the type of solution and the application time. Natural extracts, such as proanthocyanidins and green tea, showed satisfactory results in the reversal of bond strength at 5% and 10% concentrations, respectively. Sodium ascorbyl phosphate, α-tocopherol, and catalase exhibited promising results, but further research is required. The adhesive system type plays an important role in the outcome of enamel bond strength after the antioxidant application. The postponement of either restorations or orthodontic brackets cementation following bleaching procedures seems to be efficiently replaced by antioxidant application prior to bonding procedures. However, the efficacy of using an antioxidant to recover bond strength depends on its type and application time.
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Affiliation(s)
- Dorcas E R P Olmedo
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil
| | - Matheus Kury
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil
| | - Bruna A Resende
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil
| | - Vanessa Cavalli
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil
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Pathak K, Kumar P, Choudhary A, Shekh TM, Gosai P, Patnana AK. Comparative Analysis of Shear Bond Strength of Composites to the Sodium Ascorbate Hydrogel-treated Bleached Enamel Surfaces: An In Vitro Analysis. Int J Clin Pediatr Dent 2021; 14:741-747. [PMID: 35110864 PMCID: PMC8783222 DOI: 10.5005/jp-journals-10005-2068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Aim To compare the shear bond strength of composites to the sodium ascorbate hydrogel-treated bleached enamel surfaces. Materials and methods Sixty-six extracted human maxillary first premolars were sectioned mesiodistally to obtain two nonocclusal surfaces (n = 132). The specimen in the experimental group (n = 80) were divided into four treatment groups depending upon bleaching protocols used: group I (10% FGM home bleach), group II (22% Pola Night home bleach), group III (37% light-activated in-office bleach Pola Office+), and group IV (35% Pola office in-office bleach without light activation). Specimens were subjected to the 1-minute application twice with sodium ascorbate hydrogel and were further divided into two subgroups “a” (acetone-based) and “b”(ethanol-based) depending upon the bonding agents used. The specimens of the control group (n = 52) were further divided into two treatment groups, that is, positive control and negative control. The specimens were tested using universal testing machine. Results The result of the present study revealed that the specimens bleached with 10% FGM home bleach showed the greatest shear bond strength and specimens bleached with 35% in-office bleach Pola Office showed the lowest shear bond strength. Conclusion A twice 1-minute application of sodium ascorbate hydrogel was effective to reverse the deleterious results of bleaching on enamel shear bond strength. Bonding agent containing acetone as a solvent (Prime and Bond NT) in this present study showed greater shear bond strength values than the bonding agent containing ethanol as a solvent (Adper Single Bond). Statement of clinical relevance The shear bond strength of composite restorative materials could be improved by applying sodium ascorbate gel to the bleached enamel surfaces. How to cite this article Pathak K, Kumar P, Choudhary A, et al. Comparative Analysis of Shear Bond Strength of Composites to the Sodium Ascorbate Hydrogel-treated Bleached Enamel Surfaces: An In vitro Analysis. Int J Clin Pediatr Dent 2021;14(6):741–747.
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Affiliation(s)
- Karishma Pathak
- Department of Conservative Dentistry and Endodontics, Pacific Dental College and Research Center, Udaipur, Rajasthan, India
| | - Pravin Kumar
- Department of Dentistry, All India Institute of Medical Sciences, Jodhpur, Rajasthan, India
| | - Ashish Choudhary
- Department of Dentistry, All India Institute of Medical Sciences, Jodhpur, Rajasthan, India
| | - Tariq M Shekh
- Department of Conservative Dentistry and Endodontics, Pacific Dental College and Research Center, Udaipur, Rajasthan, India
| | - Pratikgiri Gosai
- Department of Conservative Dentistry and Endodontics, Darshan Dental College and Hospital, Udaipur, Rajasthan, India
| | - Arun K Patnana
- Department of Dentistry, All India Institute of Medical Sciences, Jodhpur, Rajasthan, India
- Arun K Patnana, Department of Dentistry, All India Institute of Medical Sciences, Jodhpur, Rajasthan, India, Phone: +91 9966117228, e-mail:
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TAJIRI-YAMADA Y, MINE A, NAKATANI H, KAWAGUCHI-UEMURA A, MATSUMOTO M, HAGINO R, YUMITATE M, BAN S, YAMANAKA A, MIURA J, MEERBEEK BVAN, YATANI H. MDP is effective for removing residual polycarboxylate temporary cement as an adhesion inhibitor. Dent Mater J 2020; 39:1087-1095. [DOI: 10.4012/dmj.2020-132] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Yuko TAJIRI-YAMADA
- Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry
| | - Atsushi MINE
- Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry
| | - Hayaki NAKATANI
- Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry
| | | | - Mariko MATSUMOTO
- Department of Restorative Dentistry, Hokkaido University Graduate School of Dental Medicine
- BIOMAT & University Hospitals Leuven, Department of Oral Health Sciences, KU Leuven (University of Leuven)
| | - Ryosuke HAGINO
- Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry
| | - Masahiro YUMITATE
- Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry
| | - Shintaro BAN
- Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry
| | - Azusa YAMANAKA
- Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry
| | - Jiro MIURA
- Division for Interdisciplinary Dentistry, Osaka University Dental Hospital
| | - Bart VAN MEERBEEK
- BIOMAT & University Hospitals Leuven, Department of Oral Health Sciences, KU Leuven (University of Leuven)
| | - Hirofumi YATANI
- Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry
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Sahebi S, Sobhnamayan F, Moazami F, Naseri M. Assessment of sodium thiosulfate neutralizing effect on micro-hardness of dentin treated with sodium hypochlorite. BMC Oral Health 2020; 20:326. [PMID: 33183300 PMCID: PMC7663891 DOI: 10.1186/s12903-020-01320-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Accepted: 11/08/2020] [Indexed: 11/10/2022] Open
Abstract
Background This study aims to evaluate the ability of sodium thiosulfate (STS) to neutralize the adverse effect of sodium hypochlorite (NaOCl) on dentin micro-hardness. Methods Fifty single-rooted teeth were longitudinally sectioned. The samples divided into a control and four sample groups (n = 20). All the samples were immersed in different solutions as follows, Control: Normal saline for 15 min, G1and G2: 2.5% NaOCl for 15 min, G3: 2.5% NaOCl for 15 min, followed by 5% STS for 10 min, G4: Normal saline for 15 min followed by 5% STS for 10 min. All groups except G1 incubated for one week before the test. The micro-hardness of samples was measured. Data were analyzed using the Kruskal–Wallis test for pairwise comparisons. A p value < 0.05 was considered significant. Results All groups showed a significant decrease in the micro-hardness value compared with the control group. NaOCl for one week (G2) reduced the micro-hardness of dentine compared with samples, tested immediately after immersion in NaOCl (G1) (p < 0.05). NaOCl alone (G2) or treated with STS (G3) resulted in a significant decrease in micro-hardness compared with the STS group (G4) (p < 0.05). Conclusions STS as a neutralizing agent could not prevent the dentin micro-hardness downturn caused by NaOCl.
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Affiliation(s)
- Safoora Sahebi
- Department of Endodontics, Dental School, Shiraz University of Medical Sciences, Ghasrdasht Street, 71956-15878, Shiraz, Iran
| | - Fereshteh Sobhnamayan
- Department of Endodontics, Dental School, Shiraz University of Medical Sciences, Ghasrdasht Street, 71956-15878, Shiraz, Iran
| | - Fariborz Moazami
- Department of Endodontics, Dental School, Shiraz University of Medical Sciences, Ghasrdasht Street, 71956-15878, Shiraz, Iran.
| | - Mohammadhasan Naseri
- Department of Endodontics, Dental School, Shiraz University of Medical Sciences, Ghasrdasht Street, 71956-15878, Shiraz, Iran
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Huilcapi M, Armas-Vega A, Cardenas AFM, Araujo LCR, Ocampo JB, Bandeca MC, Siqueira FSFD, Loguercio A. Effect of surface treatments on the adhesive properties of metallic brackets on fluorotic enamel. Dental Press J Orthod 2020; 25:59-67. [PMID: 32965388 PMCID: PMC7510489 DOI: 10.1590/2177-6709.25.4.059-067.oar] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Accepted: 04/20/2019] [Indexed: 11/22/2022] Open
Abstract
OBJECTIVE To compare the effectiveness of the pretreatment with sandblasting and deproteinization with NaOCl on bond strength (SBS), in situ conversion degree (CD) of brackets in fluorotic enamel, and enamel etching pattern. METHODS A total of 90 non-carious maxillary premolars were used. The teeth were then assigned to six experimental groups according to: enamel surface (sound and fluorotic enamel); surface treatment (Regular etch with 37% phosphoric acid [RE]; 5.2% sodium hypochlorite + phosphoric acid [NaOCl + RE]; sandblasting + phosphoric acid [sandblasting + RE]). After storage in distilled water (37°C/24h), the specimens were tested at 1 mm/min until failure (SBS). Enamel-resin cement interfaces were evaluated for CD using micro-Raman spectroscopy. The enamel-etching pattern was evaluated under a scanning electron microscope. Data from SBS and in situ CD values were analyzed using ANOVA two-away and Tukey test (α=0.05). The enamel etching pattern was evaluated only qualitatively. RESULTS For sound enamel, RE showed the highest SBS values, when compared to NaOCl + RE and Sandblasting + RE groups (p< 0.01). Regarding CD, only NaOCl + RE significantly compromised the mean DC, in comparison with other groups (p= 0.002). For fluorotic enamel, the Sandblasting + RE group significantly increased the mean SBS values, in comparison with RE group (p= 0.01) and no significant change was observed for CD (p> 0.52). CONCLUSIONS The application of NaOCl or sandblasting associated to phosphoric acid improved the SBS of the brackets in fluorotic enamel without compromising the CD of the resin cement, with improving of enamel interprismatic conditioning.
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Affiliation(s)
- Mariana Huilcapi
- Escuela Odontologia, Facultad de Ciencias de la Salud "Eugenio Espejo", Universidad UTE (Quito, Ecuador)
| | - Ana Armas-Vega
- Escuela Odontologia, Facultad de Ciencias de la Salud "Eugenio Espejo", Universidad UTE (Quito, Ecuador)
| | | | | | - Jessica Bedoya Ocampo
- Universidade Estadual de Ponta Grossa, Departamento de Odontologia Restauradora (Ponta Grossa/PR, Brazil)
| | | | | | - Alessandro Loguercio
- Escuela Odontologia, Facultad de Ciencias de la Salud "Eugenio Espejo", Universidad UTE (Quito, Ecuador)
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Elawsya ME, El-Shehawy TM, Zaghloul NM. Influence of various antioxidants on micro-shear bond strength of resin composite to bleached enamel. J ESTHET RESTOR DENT 2020; 33:371-379. [PMID: 32598098 DOI: 10.1111/jerd.12613] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 04/17/2020] [Accepted: 06/04/2020] [Indexed: 01/31/2023]
Abstract
OBJECTIVE Teeth bleaching causes an immediate decrease in resin composite bonding ability. This study aimed to investigate the influence of various antioxidants on resin composite bond strength to bleached enamel. MATERIALS AND METHODS One hundred and ten human maxillary incisors were used. A negative control (group A) (n = 10) was assigned (no bleaching-no antioxidant). The remaining teeth were divided into two groups (n = 50) according to the bleaching agent used: group B (40% hydrogen peroxide) and group C (35% carbamide peroxide). Both groups were subdivided into five subgroups (n = 10). A positive control subgroup (no antioxidant) and other four subgroups according to the antioxidant solution used (10% sodium ascorbate, 10% grape seed extract, 10% green tea extract, and 5% alpha-lipoic acid). After resin composite building, the micro-shear bond strength test was performed. Fracture analysis was examined using a stereomicroscope. Statistical analysis was performed using a two-way analysis of variance and Tukey's HSD post hoc test. RESULTS Bond strength significantly decreased after bleaching and there was no significant difference between bleaching agents (P < .0848). Except for alpha-lipoic acid subgroups, the other antioxidants subgroups revealed significantly higher bond strengths than bleached control subgroups (P < .0001). CONCLUSION All antioxidants used except alpha-lipoic acid were effective in the reversal of compromised bonding after bleaching. CLINICAL SIGNIFICANCE Immediate bonding procedures after bleaching are requisite when bleaching fails to treat teeth discoloration and the direct composite veneer is considered, also when shades of old composite restorations become mismatched after bleaching and should be replaced. Immediate reestablishment of resin bond strengths after bleaching can be achieved by using several antioxidants without the need for delay.
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Affiliation(s)
| | | | - Nadia Mohamed Zaghloul
- Department of Operative Dentistry, Faculty of Dentistry, Mansoura University, Mansoura, Egypt
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Ghaleb M, Orsini G, Putignano A, Dabbagh S, Haber G, Hardan L. The Effect of Different Bleaching Protocols, Used with and without Sodium Ascorbate, on Bond Strength between Composite and Enamel. MATERIALS 2020; 13:ma13122710. [PMID: 32549198 PMCID: PMC7345177 DOI: 10.3390/ma13122710] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Revised: 05/30/2020] [Accepted: 06/05/2020] [Indexed: 11/16/2022]
Abstract
This in vitro study aims to evaluate whether a solution of 10% sodium ascorbate (SA) may exert a beneficial effect on the bonding of composite to enamel after using different bleaching agents and protocols. Microtensile bond strength (µTBS) was evaluated on 72 freshly extracted human central incisors, divided into eight experimental groups and one control group (total n = 9): Group 1 serves as control (nonbleached). Group 2 was bleached with 5% carbamide peroxide. Group 3 was bleached with 5% carbamide peroxide and then treated with 10% SA. Group 4 was bleached with 10% carbamide peroxide. Group 5 was bleached with 10% carbamide peroxide, then treated with 10% SA. Group 6 was bleached with 16% carbamide peroxide. Group 7 was bleached with 16% carbamide peroxide, then treated with 10% SA. Group 8 was bleached with 6% hydrogen peroxide. Group 9 was bleached with 6% hydrogen peroxide, then treated with 10% SA. All groups were restored immediately after the different treatments using a resin composite. The µTBS values were measured using a universal testing machine and statistical analysis was performed by means of normality and variance analyses, SIDAK test for univariate test and multiple comparisons, and Student test to compare µTBS values of each group with the control. The mean µTBS values in groups 2, 4, 6, 8 were significantly lower than controls. For groups 3, 5, 7, 9, subjected to antioxidant (10% SA) application, all µTBS values increased significantly. However, only for Groups 3 and 5 there was no significant difference with the control. Applying 10% SA for 10 min may improve the bond strength composite/bleached enamel just when whitening is performed with 5% and 10% carbamide peroxide.
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Affiliation(s)
- Maroun Ghaleb
- Department of Restorative Dentistry, Dental School, Saint Joseph University, Beirut 11072180, Lebanon; (M.G.); (S.D.); (G.H.); (L.H.)
| | - Giovanna Orsini
- Department of Clinical Sciences and Stomatology, School of Medicine, Polytechnic University of Marche, Via Tronto 10, 60126 Ancona, Italy;
- Correspondence: ; Tel.: +39-34-7248-3290; Fax: +39-07-1220-6221
| | - Angelo Putignano
- Department of Clinical Sciences and Stomatology, School of Medicine, Polytechnic University of Marche, Via Tronto 10, 60126 Ancona, Italy;
| | - Sarah Dabbagh
- Department of Restorative Dentistry, Dental School, Saint Joseph University, Beirut 11072180, Lebanon; (M.G.); (S.D.); (G.H.); (L.H.)
| | - Georges Haber
- Department of Restorative Dentistry, Dental School, Saint Joseph University, Beirut 11072180, Lebanon; (M.G.); (S.D.); (G.H.); (L.H.)
| | - Louis Hardan
- Department of Restorative Dentistry, Dental School, Saint Joseph University, Beirut 11072180, Lebanon; (M.G.); (S.D.); (G.H.); (L.H.)
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Durigon M, Cecchin D, de Carli J, Souza MA, Farina A. Could calcium hypochlorite and grape seed extract keep the mechanical properties of root dentin and fracture resistance of weakened roots? J Mech Behav Biomed Mater 2020; 106:103736. [DOI: 10.1016/j.jmbbm.2020.103736] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 03/11/2020] [Accepted: 03/16/2020] [Indexed: 11/28/2022]
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Zhang H, Shao S, Du A, Wang Y, Cheng B, Zhang Z. Comparative Evaluation of Two Antioxidants on Reversing the Immediate Bond Strength of Bleached Enamel: In Vitro Study. Med Sci Monit 2020; 26:e920481. [PMID: 32086431 PMCID: PMC7051100 DOI: 10.12659/msm.920481] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Background Tooth bleaching causes a significant decrease in the bonding strength between the resin and human enamel. Nevertheless, the effects of different antioxidant types on the immediate bonding strength of resin and bleached enamel were significantly different. Therefore, the objective of this study was to compare the effects of 2 antioxidants for enhancing the bond strength of the resin to bleached enamel. Material/Methods There were 48 enamel blocks performed from 48 recently extracted maxillary central incisors. There were 8 groups: NC (negative control, no bleached specimens restored without antioxidants); NA (no antioxidant, bleached specimens bonded immediately without any antioxidants); SA30, SA60, and SA120 (bleached specimens accepted the management of 10% sodium ascorbate (SA) for 30 minutes, 60 minutes, and 120 minutes, respectively, before restored); PC30, PC60, and PC120 (bleached specimens received treatment of 5% proanthocyanidins (PC) for 30 minutes, 60 minutes, and 120 minutes, respectively, before restored). We measured the micro-tensile bond strength of specimens and used 2-way ANOVA to analyze the data. Results The mean±standard deviation bond strength measured were: NC, 29.99±4.00; NA, 14.90±1.97; SA30, 18.60±2.20; SA60, 22.57±2.71; SA120, 26.15±3.85; PC30, 16.78±2.29; PC60, 19.13±2.24, PC120, 23.90±2.01 MPa. In addition, the fracture types were mainly of an adhesive mode (88.75%), followed by mixed (7.5%), and cohesive (3.75%). Conclusions 10% sodium ascorbate provided a comparatively more promising improvement for immediate bond strength than 5% proanthocyanidins when the same duration of antioxidant was applied.
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Affiliation(s)
- Hong Zhang
- School and Hospital of Stomatology, Jilin University, Changchun, Jilin, China (mainland)
| | - Siqi Shao
- Shenzhen Stomatology Hospital, Shenzhen, Guangdong, China (mainland)
| | - Aobo Du
- School and Hospital of Stomatology, Jilin University, Changchun, Jilin, China (mainland)
| | - Ying Wang
- School and Hospital of Stomatology, Jilin University, Changchun, Jilin, China (mainland)
| | - Boqun Cheng
- School and Hospital of Stomatology, Jilin University, Changchun, Jilin, China (mainland)
| | - Zhimin Zhang
- School and Hospital of Stomatology, Jilin University, Changchun, Jilin, China (mainland)
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Nakatani H, Mine A, Matsumoto M, Tajiri Y, Hagino R, Yumitate M, Ban S, Miura J, Minamino T, Yatani H. Effectiveness of pretreatment with phosphoric acid, sodium hypochlorite and sulfinic acid sodium salt on root canal dentin resin bonding. J Prosthodont Res 2020; 64:272-280. [PMID: 31952931 DOI: 10.1016/j.jpor.2019.08.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Revised: 07/16/2019] [Accepted: 08/15/2019] [Indexed: 10/25/2022]
Abstract
PURPOSE The purpose of this study was to evaluate the effect of pretreatment using phosphoric acid, sodium hypochlorite and sulfinic acid sodium salt on the bonding of one-step self-etching adhesives to root canal dentin. METHODS Thirty-six single-rooted sound human premolars were randomly assigned into three groups before applying the one-step self-etching adhesive. These comprised a control group with no pretreatment, an NC group that received phosphoric acid and subsequent sodium hypochlorite gel pretreatments, and an NC+AC group that received an additional treatment with sulfinic acid sodium salt following the same pretreatment applied to the NC group. Microtensile bond strength measurements, bonding interface observations by scanning electron microscopy (SEM), elemental analyses by X-ray photoelectron spectroscopy (XPS) and degree of polymerization (DOP) analyses by Raman spectroscopy were subsequently performed. RESULTS The bond strength was significantly higher in the NC+AC group than in the other two groups (Control: P=000.1 and NC: P=0.004). SEM observations showed that resin tags were present in the dentinal tubules in the NC and NC+AC groups. Compared to the control group, the adhesive resin layer had a lower DOP in the NC group, while the DOP for the NC+AC group was higher than that of the NC specimens. CONCLUSIONS Bonding to root canal dentin was improved by applying sulfinic acid sodium salt in addition to treatment with phosphoric acid followed by sodium hypochlorite. The DOP of the adhesive resin was reduced by sodium hypochlorite and subsequently restored by applying sulfinic acid sodium salt.
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Affiliation(s)
- Hayaki Nakatani
- Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry, Japan
| | - Atsushi Mine
- Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry, Japan.
| | - Mariko Matsumoto
- Department of Restorative Dentistry, Hokkaido University Graduate School of Dental Medicine, Japan
| | - Yuko Tajiri
- Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry, Japan
| | - Ryosuke Hagino
- Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry, Japan
| | - Masahiro Yumitate
- Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry, Japan
| | - Shintaro Ban
- Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry, Japan
| | - Jiro Miura
- Division for Interdisciplinary Dentistry, Osaka University Dental Hospital, Japan
| | - Takuya Minamino
- Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry, Japan
| | - Hirofumi Yatani
- Department of Fixed Prosthodontics, Osaka University Graduate School of Dentistry, Japan
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Khatib MS, Devarasanahalli SV, Aswathanarayana RM, Venkateswara AH, Nadig RR. Microtensile Bond Strength of Composite Resin Following the Use of Bromelain and Papain as Deproteinizing Agents on Etched Dentin: An In Vitro Study. Int J Clin Pediatr Dent 2020; 13:43-47. [PMID: 32581478 PMCID: PMC7299883 DOI: 10.5005/jp-journals-10005-1743] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Aim and objectives The aim of this study was to evaluate and compare the deproteinizing effect of sodium hypochlorite, bromelain, and papain on microtensile bond strength of composite resin to etched dentin. Materials and methods Eighty freshly extracted permanent molars were wet grounded into a flat surface using a diamond disk to expose the superficial dentinal surface. Teeth were etched with 37% phosphoric acid for 15 seconds and rinsed with water and blot dried. Teeth were divided into four groups (n = 20) based on the method of dentin deproteinization. Group I: only etching; group II: deproteinized with 5.25% sodium hypochlorite for 1 minute; group III: deproteinized with 8% bromelain enzyme for 1 minute; and group IV: deproteinized with 8% papain enzyme for 1 minute. All the samples were washed off with distilled water to remove deproteinizing agents. Sample surfaces were blot dried and bonding of the dentin surface was performed and restored with light cure bulk fill composite. Samples were stored in distilled water (37°C/24 hours) and thermocycled. Then, the teeth were longitudinally sectioned and individually fixed to a sectioning block using acrylic resin. The block was mounted on hard tissue microtome and sectioned to get one to three slabs of 1 mm thick sections. The beam was then attached to a custom-made jig using screws subjected to the Instron universal testing machine. A tensile load was applied at a crosshead speed of 0.5 mm/minute until the beam fractured. Results Higher mean bond strength was recorded in group IV followed by group III, group II, and group I, respectively. Group III presented a statistically significant highest mean score compared to other study groups with group I and group II (p < 0.001), followed by group IV having significantly higher mean score compared to group I and group II (p < 0.001) and finally a significant difference was observed between group II and group I (p < 0.001). However, the mean microtensile bond strength score did not differ significantly between group III and group IV (p = 0.20). Conclusion Within the limitations of this present in vitro study, the following conclusions were drawn. The microtensile bond strength of dentine tested in various deproteinizing agents is as follows: 8% bromelain > 8% papain > 5.25% NaOCl > control group. Naturally occurring deproteinizing agents, such as bromelain and papain, used in this study have resulted in greater bond strength values when compared to that of traditionally used chemical agent such as NaOCl. How to cite this article Khatib MS, Devarasanahalli SV, Aswathanarayana RM, et al. Microtensile Bond Strength of Composite Resin Following the Use of Bromelain and Papain as Deproteinizing Agents on Etched Dentin: An In Vitro Study. Int J Clin Pediatr Dent 2020;13(1):43–47.
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Affiliation(s)
- Mohd Sibghatullah Khatib
- Department of Conservative Dentistry and Endodontics, Dayananda Sagar College of Dental Sciences and Hospital, Bengaluru, Karnataka, India
| | - Swapna V Devarasanahalli
- Department of Conservative Dentistry and Endodontics, Dayananda Sagar College of Dental Sciences and Hospital, Bengaluru, Karnataka, India
| | - Ranjini M Aswathanarayana
- Department of Conservative Dentistry and Endodontics, Dayananda Sagar College of Dental Sciences and Hospital, Bengaluru, Karnataka, India
| | - Ashwath H Venkateswara
- Department of Research and Development, The Himalaya Drug Company, Bengaluru, Karnataka, India
| | - Roopa R Nadig
- Department of Conservative Dentistry and Endodontics, Dayananda Sagar College of Dental Sciences and Hospital, Bengaluru, Karnataka, India
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The Effect of Antioxidant Treatment on the Shear Bond Strength of Different Bonding Systems to Bleached Enamel. ACTA ACUST UNITED AC 2019. [DOI: 10.14260/jemds/2019/672] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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Seraj B, Ghadimi S, Najafpoor E, Abdolalian F, Khanmohammadi R. Comparative evaluation of the effects of different methods of post space preparation in primary anterior teeth on the fracture resistance of tooth restorations. J Dent Res Dent Clin Dent Prospects 2019; 13:141-146. [PMID: 31592310 PMCID: PMC6773913 DOI: 10.15171/joddd.2019.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2018] [Accepted: 08/03/2019] [Indexed: 11/09/2022] Open
Abstract
Background. Severely damaged teeth do not have adequate structure to support the composite crown; therefore, use of the canal space has been suggested to increase retention. Furthermore, the effect of post space irrigation protocols on the fracture resistance of the primary anterior teeth has not definitely been studied in postoperative modalities. This study compared the fracture resistance of restorations of primary anterior teeth following irrigation of the post space with sodium hypochlorite and chlorhexidine with and without application of burs.
Methods. Ninety-four extracted primary anterior teeth were selected. Root canal treatments were carried out, 4 mm of the post space was left empty and 1 mm was regarded as a bed. The post space was prepared with and without a bur and the irrigation procedures were carried out with 0.2% chlorhexidine and 2.5% sodium hypochlorite solutions. Composite posts were inserted into the canals and the crowns were restored. Following composite etching and light-curing, the fracture resistance of the restored teeth was determined by a universal testing machine.
Results. In the sodium hypochlorite group, fracture resistance of the teeth was 376.8±107.29 N and 475.5±186.89 N without and with bur preparation, respectively. For chlorhexidine protocol, the values were 370.88±175.46 N and 430.85±178.22 N without and with bur preparation, respectively. The effect of irrigating material was not significant; however, the bur and irrigating preparation significantly increased the fracture resistance of the restored teeth (P=0.02).
Conclusion. Post space irrigation with 0.2% chlorhexidine or 2.5% sodium hypochlorite did not significantly affect the fracture resistance of primary anterior teeth in the post treatment modality.
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Affiliation(s)
- Bahman Seraj
- Dental Research Center and Department of Pediatric Dentistry, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
| | - Sara Ghadimi
- Laser Research Center of Dentistry, Dental Research Institute, Department of Pediatric Dentistry, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
| | - Ebrahim Najafpoor
- Department of Pediatric Dentistry, School of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Fatemeh Abdolalian
- Department of Periodontics, School of Dentistry, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Razieh Khanmohammadi
- Department of Pediatric Dentistry, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
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Vieira HH, Toledo JC, Catelan A, Gouveia THN, Aguiar FHB, Lovadino JR, Lima DANL. Effect of sodium metabisulfite gel on the bond strength of dentin of bleached teeth. Eur J Dent 2019; 12:163-170. [PMID: 29988201 PMCID: PMC6004799 DOI: 10.4103/ejd.ejd_165_17] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Objective This study aimed to evaluate the effect of the application of sodium metabisulfite (SMB) on the bond strength of bleached teeth. Materials and Methods The study was divided into two parts. The first part evaluated the application of various concentrations of SMB for 1 h prior to the completion of bonding procedures. Fifty blocks were divided into five groups (n = 10): control; bleaching with 35% hydrogen peroxide (HP); HP + 5% SMB; HP + 12.5% SMB; and HP + 25% SMB. The second part evaluated the application of 25% gel SMB to either enamel or dentin, including the application time. Sixty blocks were divided into six groups (n = 10): control; bleaching with 35% HP; HP + 25% SMB for 1 h in enamel; HP + 25% SMB for 1 h in dentin; HP + 25% SMB for 10 min in enamel; and HP + 25% SMB for 10 min in dentin. Statistical Analysis Following the completion of microshear bond testing, data were analyzed using one-way analysis of variance as well as Tukey's and Dunnett's tests. Results In part 1, data analysis revealed statistical differences (P < 0.0001) between HP and HP + 5% SMB. No statistical differences were found between the control and both HP + 12.5% SMB and HP + 25% SMB. Part 2 revealed a statistical difference (P = 0.001359) only between the bleached group and others. Conclusions The use of 25% SMB gel immediately after bleaching was able to reverse the deleterious effect of bleaching on the bond strength of dental composites to dentin.
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Affiliation(s)
- Henrique Heringer Vieira
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas - UNICAMP, Piracicaba, SP, Brazil
| | - Josè Carlos Toledo
- Department of Chemistry, Faculty of Philosophy and Sciences of Ribeirão Preto, University of São Paulo - FFCLRP/USP, Ribeirão Preto, SP, Brazil
| | - Anderson Catelan
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas - UNICAMP, Piracicaba, SP, Brazil
| | - Thayla Hellen Nunes Gouveia
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas - UNICAMP, Piracicaba, SP, Brazil
| | - Flávio Henrique Baggio Aguiar
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas - UNICAMP, Piracicaba, SP, Brazil
| | - Josè Roberto Lovadino
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas - UNICAMP, Piracicaba, SP, Brazil
| | - Dèbora Alves Nunes Leite Lima
- Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas - UNICAMP, Piracicaba, SP, Brazil
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Rezaei M, Aliasghar E, Rezvani MB, Chiniforush N, Moradi Z. Effect of Er: YAG Laser on Microtensile Bond Strength of Bleached Dentin to Composite. J Lasers Med Sci 2019; 10:117-124. [PMID: 31360380 DOI: 10.15171/jlms.2019.19] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Introduction: In non-vital tooth bleaching, dentin is in direct contact with the bleaching agent, 1 to 3-week delay is needed to eliminate free radicals from tooth structure. The present study aimed to evaluate the effect of irradiation of Er: YAG laser on immediate microtensile bond strength of bleached dentin to composite. Methods: Sixty sounds human teeth were collected and randomly divided into 4 groups (n=15): no bleaching (NB), opalescence endo hydrogen peroxide (HP) gel bleaching, sodium perborate (SP) bleaching and laser bleaching with heydent gel (LB). The groups were divided into 3 subgroups (n=5): no surface treatment, Er: YAG laser irradiation and 10% sodium ascorbate (SA). All samples were restored and underwent microtensile bond strength testing. Statistical analysis was carried out using one-way and two-way ANOVA. Results: Bond strength in NB-SA group had a significant difference with the NB group (P<0.05) while no significant difference was noted between NB and NB-Er groups (P=0.55). Application of SA and Er: YAG laser after bleaching with SP did not enhance the bond strength (P=0.07). Conclusion: Application of SA and Er: YAG laser after HP gel bleaching significantly enhanced the bond strength. Application of Er: YAG laser after internal bleaching with HP gel could enhance the bond strength.
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Affiliation(s)
- Mohsen Rezaei
- Department of Operative Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | | | | | - Nasim Chiniforush
- Laser Research Center of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
| | - Zohreh Moradi
- Department of Operative Dentistry, Tehran University of Medical Sciences, Tehran, Iran
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Soligo LT, Lodi E, Farina AP, Souza MA, Vidal CDMP, Cecchin D. Antibacterial Efficacy of Synthetic and Natural-Derived Novel Endodontic Irrigant Solutions. Braz Dent J 2019; 29:459-464. [PMID: 30517444 DOI: 10.1590/0103-6440201802172] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2018] [Accepted: 06/21/2018] [Indexed: 02/05/2023] Open
Abstract
The aim of this study was to compare the efficacy of grape seed extract (GSE), calcium hypochlorite [Ca(ClO)2], and sodium hypochlorite (NaOCl) irrigant solutions with rotary or reciprocating instrumentation for disinfection of root canals inoculated with Enterococcus faecalis. The mesiobuccal root canals of mandibular molars were prepared and inoculated with Enterococcus faecalis for 21 days. The roots were then randomly divided into the following eight experimental groups (n=11) according to the instrumentation technique and disinfection protocol: ProTaper Next or Reciproc R25 with sodium chloride (control group), 6% NaOCl, 6% Ca(ClO)2, or 50% GSE used for irrigation during instrumentation. The antimicrobial activity was determined on the basis of a reduction in colony-forming units (CFUs) counted on bacterial samples collected before and after root canal instrumentation and expressed as a percentage of reduction. Data were evaluated by two-way ANOVA followed by Tukey HSD post-hoc tests (p<0.05). No significant differences were observed in bacterial reduction between the ProTaper Next and Reciproc R25 systems (p>0.05), regardless of the irrigant solution used. Furthermore, all active solutions (6% NaOCl, 50% GSE, and 6% Ca(ClO)2) showed similar potential to reduce bacterial counts (p>0.05) and were significantly more effective than sodium chloride (control) (p<0.05). The results suggest that the GSE and Ca(ClO)2 have potential clinical application as irrigant solutions in endodontic therapy since they present bactericidal efficacy against Enterococcus faecalis.
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Affiliation(s)
- Larissa Tais Soligo
- Department of Restorative Dentistry, School of Dentistry, UPF - Universidade de Passo Fundo, Passo Fundo, Brazil
| | - Ediléia Lodi
- Department of Restorative Dentistry, School of Dentistry, UPF - Universidade de Passo Fundo, Passo Fundo, Brazil
| | - Ana Paula Farina
- Department of Restorative Dentistry, School of Dentistry, UPF - Universidade de Passo Fundo, Passo Fundo, Brazil
| | - Matheus Albino Souza
- Department of Restorative Dentistry, School of Dentistry, UPF - Universidade de Passo Fundo, Passo Fundo, Brazil
| | | | - Doglas Cecchin
- Department of Restorative Dentistry, School of Dentistry, UPF - Universidade de Passo Fundo, Passo Fundo, Brazil
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Al-Gerny YA, Ghorab SM, Soliman TA. Bond strength and elemental analysis of oxidized dentin bonded to resin modified glass ionomer based restorative material. J Clin Exp Dent 2019; 11:e250-e256. [PMID: 31001395 PMCID: PMC6461732 DOI: 10.4317/jced.55432] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2018] [Accepted: 01/07/2019] [Indexed: 11/05/2022] Open
Abstract
Background This study aimed to investigate the influence of hesperidin application on the bonding of resin-modified glass ionomer-based restorative material to dentin treated with oxygen-induced endodontic irrigants. Material and Methods One hundred human permanent molars were categorized into five groups (n= 20/group), treated with various irrigants as follows: Group C; distilled water (control group), Group SH; 5.25% NaOCl, Group SH+H; 5.25% NaOCl + 5 % hesperidin, Group HP; 10% H2O2, Group HP+H; 10% H2O2 + 5 % hesperidin. Specimens were bonded with RMGI based restorative material. For each group, half of the specimens were evaluated for µSBS by a universal testing machine and the other half for dentin ion uptake by EDX. Additional ten specimens (n=2/per group) were prepared for the micro-morphological analysis under SEM. Results Hesperidin groups improved the µSBS, with a significant effect for HP+H group (p<. 05). Dentin ion uptake was significantly (p<. 05) improved in hesperidin groups. Conclusions In conclusion, Application of hesperidin in conjunction with RMGI based restorative material improved the dentin bond strength and ion uptake; this could be a promising approach to aid dental practitioners in their decisions, regarding which restorative material to use especially in caries susceptible patients. Key words:Hesperidin, elemental analysis, bond strength.
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Affiliation(s)
| | - Sayed-Mohammed Ghorab
- Dental Biomaterials Department, Faculty of Dentistry, Mansoura University, Mansoura, Egypt
| | - Tarek-Ahmed Soliman
- Dental Biomaterials Department, Faculty of Dentistry, Mansoura University, Mansoura, Egypt
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Sariyilmaz E, Sivas Yilmaz Ö, Keskin C, Keleş A. Effect of sodium hypochlorite and chlorhexidine irrigating solutions and their inactivating agents on the push-out bond strength of mineral trioxide aggregate. Biomed Mater Eng 2019; 30:279-285. [PMID: 30988236 DOI: 10.3233/bme-191051] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The objective of this study was to evaluate the effect of sodium hypochlorite and chlorhexidine solutions and their inactivating agents on the push-out bond strength of mineral trioxide aggregate (MTA). One hundred fifty root slices were prepared and their root canal spaces were enlarged using diamond burs. MTA was prepared and compacted to root canal spaces. The samples were randomly separated to 4 groups that would be immersed into the selected solutions (5.25% sodium hypochlorite (NaOCl), 5.25% NaOCl and sodium thiosulfate, 2% chlorhexidine (CHX), 2% CHX and a mixture of Tween 80 and 0.3% L-alfa-lecithin) and a control group (n = 30). Push-out bond strength of each specimen was tested with universal testing machine. The data was analyzed by one-way analysis of variance and Tukey tests. There were no significant differences between the push-out bond strength values of the irrigation groups and the control group. A significant difference was found between the push-out bond strength values of NaOCl-Sodium thiosulfate and CHX-L-alpha-lecithin groups. Contact with NaOCl and its neutralizing agent with MTA after 10 minutes of setting period increased the push-out bond strength of MTA. On the other hand, any contact with CHX alone or with subsequent application using L-alfa-lecithin should be avoided since that might decrease the push-out bond strength of freshly mixed MTA.
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Affiliation(s)
- Evren Sariyilmaz
- Department of Endodontics, Faculty of Dentistry, Ordu University, Ordu, Turkey
| | - Özlem Sivas Yilmaz
- Department of Endodontics, Faculty of Dentistry, Ondokuz Mayıs University, Samsun, Turkey
| | - Cangül Keskin
- Department of Endodontics, Faculty of Dentistry, Ondokuz Mayıs University, Samsun, Turkey
| | - Ali Keleş
- Department of Endodontics, Faculty of Dentistry, Ondokuz Mayıs University, Samsun, Turkey
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Coppla FM, Freire A, Bittencourt B, Armas-Vega A, Benítez VEB, Calixto AL, Loguercio AD. Influence of simplified, higher-concentrated sodium ascorbate application protocols on bond strength of bleached enamel. J Clin Exp Dent 2019; 11:e21-e26. [PMID: 30697390 PMCID: PMC6343990 DOI: 10.4317/jced.55153] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Accepted: 12/03/2018] [Indexed: 11/16/2022] Open
Abstract
Background Bleaching procedures performed before restorative procedures, due to the oxygen released, affects the quality of bonding restorations. The application of an lower-concentrated antioxidant for one-hour or more can reversal the compromised bonding to bleached enamel, but it was not effective according to the bleaching concentrations applied. The aim of the present study was to evaluate simplified protocol of higher-concentrated sodium ascorbate (35%SA) in bond strength values of enamel bleached with 10%, 16%, 22% carbamide peroxide (CP) or 35% hydrogen peroxide (HP). Material and Methods Three hundred and forty enamel surfaces of 85 human third molars were used, divided into 17 groups (n=20), according to the following groups: control = no bleaching and no ascorbic acid application; bleaching (CP10%, CP16%, CP22% at-home and HP 35% in-office) and 35%SA application (no application; 35%SA applied twice for 1-min each [SA2×1], twice for 5-min each [SA2×5] and; twice for 10-min each [SA2×10]). After that, adhesive was applied and composite cylinders were made with Filtek Z350 composite. Microshear test was performed in a universal testing machine. BS values were statistically evaluated using ANOVA and Tukey’s and Dunnet’s (against control) tests, with 5% level of significance. Results All bleaching concentrations significantly decrease the enamel bond strength results when compared to control group (p<0.05). More concentrated PC (PC22% and PH35%) showed lower enamel bond strength results when compared to lower concentrated PC (PC10% and PC16%; p<0.05). A significant increase of the enamel bond strength results were only observed when SA2×5 and SA2×10 were applied (p<0.05). Conclusions The application of 35% sodium ascorbate for twice 5- and 10-min each was an efficient protocol to reverse the bond strength in bleached enamel at the same level as the no bleaching enamel, independently of the bleaching concentration used. Key words:Tooth bleaching, hydrogen peroxide, sodium ascorbate, bond strength.
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Affiliation(s)
- Fabiana-Madalozzo Coppla
- DDS, Ms, PhD, professor, School of Dentistry, Health and Biosciences, Pontifícia Universidade Católica do Paraná, Curitiba, Paraná, Brazil
| | - Andrea Freire
- DDS, Ms, PhD, professor, School of Dentistry, Health and Biosciences, Pontifícia Universidade Católica do Paraná, Curitiba, Paraná, Brazil
| | - Bruna Bittencourt
- DDS, Ms, PhD, professor, Department of Restorative Dentistry, School of Dentistry, State University of Ponta Grossa, Ponta Grossa, Paraná, Brazil
| | - Ana Armas-Vega
- DDS, Ms, PhD, Professor Department of Dentistry, Tecnológica Equinoccial University, Quito, Ecuador
| | | | - Abraham-Lincoln Calixto
- DDS, Ms, PhD, professor, Department of Restorative Dentistry, School of Dentistry, State University of Ponta Grossa, Ponta Grossa, Paraná, Brazil
| | - Alessandro-Dourado Loguercio
- DDS, Ms, PhD, professor, Department of Restorative Dentistry, School of Dentistry, State University of Ponta Grossa, Ponta Grossa, Paraná, Brazil.,DDS, Ms, PhD, Professor Department of Dentistry, Tecnológica Equinoccial University, Quito, Ecuador
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Alkhudhairy FI, Yaman P, Dennison J, McDonald N, Herrero A, Bin-Shuwaish MS. The effects of different irrigation solutions on the bond strength of cemented fiber posts. Clin Cosmet Investig Dent 2018; 10:221-230. [PMID: 30498372 PMCID: PMC6207268 DOI: 10.2147/ccide.s155688] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Objective To study effect of root canal irrigant solutions on the bond strength of cemented fiber posts, and resin cement-tags in root canal dentin. Materials and methods Fifty-two human single-rooted anterior teeth were selected and stored in 1% sodium azide. Crowns were sectioned 2 mm incisal to the cemento enamel junction with diamond bur at high speed under water-cooling. After standard root canal treatment to tested teeth, they were randomly assigned into four groups (n=13) corresponding to the endodontic irrigant solution that was used during post space preparation. The treatment groups were: Group 1: 6.15% sodium hypochlorite; Group 2: 17% EDTA; Group 3: 6.15% NaOCl +17% EDTA; Group 4: 6.15% NaOCl +0.12% chlorhexidine solution. Parallel-sided fiber posts were used for all specimens. Samples were embedded in a cylindrical PVC mounting jig to facilitate perpendicular sectioning. With low speed diamond saw, cervical and apical specimens from each tooth were obtained and subjected to push-out test using universal testing machine. SEM was used to examine the root-canal dentin surface. Results Statistical analysis revealed significant difference among the groups at P<0.05. Group 2 treated with EDTA, had the highest bond strength; 18.63±2.85 MPa in cervical specimens and 13.49±3.67 MPa in apical specimens. The cervical specimens of Groups 2 and 3 were significantly different than the apical specimens in the same group. Adhesive failure between cement and dentin was the main failure mode observed in all groups. Groups irrigated with EDTA showed cleaner dentin surface and better resin tag formation, while groups treated with NaOCl showed less resin tag formation and insufficient smear layer removal. Conclusion NaOCl had adverse effect on bond strength of self-adhesive resin cement to radicular dentin. EDTA irrigant solution produced higher bond strength and was more effective in removing smear layer than NaOCl.
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Affiliation(s)
- Fahad I Alkhudhairy
- Department of Restorative Dental Sciences, College of Dentistry, King Saud University, Riyadh, Kingdom of Saudi Arabia,
| | - Peter Yaman
- Department of Cariology, Restorative Sciences and Endodontics, School of Dentistry, University of Michigan, Ann Arbor, Michigan, USA
| | - Joseph Dennison
- Department of Cariology, Restorative Sciences and Endodontics, School of Dentistry, University of Michigan, Ann Arbor, Michigan, USA
| | - Neville McDonald
- Department of Cariology, Restorative Sciences and Endodontics, School of Dentistry, University of Michigan, Ann Arbor, Michigan, USA
| | - Alberto Herrero
- Biologic and Materials Sciences, School of Dentistry, University of Michigan, Ann Arbor, Michigan, USA
| | - Mohammed S Bin-Shuwaish
- Department of Restorative Dental Sciences, College of Dentistry, King Saud University, Riyadh, Kingdom of Saudi Arabia,
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Wang Y, Chen C, Zang HL, Liang YH. The recovery effect of proanthocyanidin on microtensile bond strength to sodium hypochlorite‐treated dentine. Int Endod J 2018; 52:371-376. [PMID: 30144358 DOI: 10.1111/iej.13005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Accepted: 08/22/2018] [Indexed: 11/30/2022]
Affiliation(s)
- Y. Wang
- Department of Cariology and Endodontology Peking University School and Hospital of Stomatology BeijingChina
- Dental Clinic Peking University International Hospital Beijing China
| | - C. Chen
- Department of Cariology and Endodontology Peking University School and Hospital of Stomatology BeijingChina
| | - H. L. Zang
- Department of Cariology and Endodontology Peking University School and Hospital of Stomatology BeijingChina
| | - Y. H. Liang
- Department of Cariology and Endodontology Peking University School and Hospital of Stomatology BeijingChina
- Dental Clinic Peking University International Hospital Beijing China
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Smear Layer-Deproteinization: Improving the Adhesion of Self-Etch Adhesive Systems to Caries-Affected Dentin. ACTA ACUST UNITED AC 2018. [DOI: 10.1007/s40496-018-0185-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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