1
|
Mitic AD, Gasic JZ, Barac RG, Radenkovic GS, Sunaric SM, Popovic JZ, Nikolic MM. Ultrastructural changes in the cemento-enamel junction caused by acidic beverages: An in vitro study. Microsc Res Tech 2019; 83:91-98. [PMID: 31637811 DOI: 10.1002/jemt.23392] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Revised: 09/13/2019] [Accepted: 09/23/2019] [Indexed: 12/29/2022]
Abstract
The present in vitro study was aimed at evaluating the morphological changes in the cemento-enamel junction (CEJ) after exposure to acidic beverages using the scanning electron microscopy (SEM). The initial pH and titratable acidity (TA) was analyzed from follow groups: (I) Coca cola, (II) orange juice, (III) Cedevita, (IV) Red Bull, (V) Somersby cider, and (VI) white wine. The CEJ samples (n = 64), obtained from unerupted third molars, were allocated to one control (artificial saliva, n = 16) and six experimental groups (n = 8). The experimental samples were immersed in beverages (50 ml) for 15 min, three times daily, 10 days, and in artificial saliva between immersions. SEM analysis was performed in a blind manner, according to scoring scale. One-way ANOVA and Tukey's post hoc tests, as well as Kruskal-Wallis and Mann-Whitney U test used for statistical analysis. The pH values of the acidic beverages ranged from 2.65 (Coca cola) to 3.73 (orange juice), and TA ranged from 1.90 ml (Coca cola) to 5.70 ml (orange juice) of NaOH to reach pH 7.0. The SEM analysis indicated statistically significant differences between the control samples and those immersed in acidic beverages. The Groups IV, I, and II, showed the highest CEJ damage grade while those of the Group VI were the lowest. All the tested acidic beverages caused morphological changes in the CEJ with a smaller or larger exposure of dentine surface, and were not always related to the pH or TA of acidic beverages.
Collapse
Affiliation(s)
- Aleksandar D Mitic
- Department of Restorative Dentistry and Endodontics, Clinic of Dentistry, Faculty of Medicine, University of Nis, Nis, Serbia
| | - Jovanka Z Gasic
- Department of Restorative Dentistry and Endodontics, Clinic of Dentistry, Faculty of Medicine, University of Nis, Nis, Serbia
| | - Radomir G Barac
- Department of Restorative Dentistry and Endodontics, Clinic of Dentistry, Faculty of Medicine, University of Nis, Nis, Serbia
| | - Goran S Radenkovic
- Department of Histology and Embryology, Faculty of Medicine, University of Nis, Nis, Serbia
| | - Slavica M Sunaric
- Department of Chemistry, Faculty of Medicine, University of Nis, Nis, Serbia
| | - Jelena Z Popovic
- Department of Restorative Dentistry and Endodontics, Clinic of Dentistry, Faculty of Medicine, University of Nis, Nis, Serbia
| | - Marija M Nikolic
- Department of Restorative Dentistry and Endodontics, Clinic of Dentistry, Faculty of Medicine, University of Nis, Nis, Serbia
| |
Collapse
|
2
|
Cheng ZL, Cai M, Chen XY, Li P, Chen XH, Lin ZM, Xu M. A novel cutting machine supports dental students to study the histology of the tooth hard tissue. J Dent Sci 2019; 14:113-118. [PMID: 31210885 PMCID: PMC6561865 DOI: 10.1016/j.jds.2019.03.012] [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] [Received: 02/18/2019] [Revised: 03/10/2019] [Indexed: 11/23/2022] Open
Abstract
Background/purpose Ground section is the only way to study tooth enamel, and the conventional methods of making ground sections, grinding by hand or using a hard tissue microtome are either too time consuming or money costing. This study aimed to develop and assess a novel cutting machine in making ground sections and learning aid for dental students. Materials and methods By using the novel cutting machine, the students cut the embedding teeth and got 50 μm ground sections efficiently. A series of fine/coarse combination stones were used for grinding the sections to uniform 20 μm thickness. Self-made ground sections were used in the lab class of tooth tissue. Questionnaires were designed to assess the participants’ attitude towards the cutting machine and their knowledge of the tooth tissue before and after making the tooth ground sections. Results Our findings indicated that the novel cutting machine can act as an efficient tool to make tooth ground sections. Indeed, data indicated that making tooth ground section progress can assist students’ understanding of the structure and function of tooth and their pathology knowledge had improved. From a qualitative point of view, the students described making tooth ground section progress improve their practical ability and study interest in oral pathology. Conclusion Overall, these findings indicate that our novel cutting machine can act as an efficient tool to make tooth ground sections and support dental students to study the pathology of the tooth hard tissue in a simple and functional way.
Collapse
Affiliation(s)
- Zhi-Lan Cheng
- Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, No. 56 Ling Yuan Xi Road, Guangzhou, China
- Guangdong Provincial Key Laboratory of Stomatology, No. 56 Ling Yuan Xi Road, Guangzhou, China
| | - Min Cai
- Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, No. 56 Ling Yuan Xi Road, Guangzhou, China
- Guangdong Provincial Key Laboratory of Stomatology, No. 56 Ling Yuan Xi Road, Guangzhou, China
| | - Xuan-Yi Chen
- Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, No. 56 Ling Yuan Xi Road, Guangzhou, China
- Guangdong Provincial Key Laboratory of Stomatology, No. 56 Ling Yuan Xi Road, Guangzhou, China
| | - Pei Li
- Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, No. 56 Ling Yuan Xi Road, Guangzhou, China
- Guangdong Provincial Key Laboratory of Stomatology, No. 56 Ling Yuan Xi Road, Guangzhou, China
| | - Xiao-Hua Chen
- Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, No. 56 Ling Yuan Xi Road, Guangzhou, China
- Guangdong Provincial Key Laboratory of Stomatology, No. 56 Ling Yuan Xi Road, Guangzhou, China
| | - Zheng-Mei Lin
- Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, No. 56 Ling Yuan Xi Road, Guangzhou, China
- Guangdong Provincial Key Laboratory of Stomatology, No. 56 Ling Yuan Xi Road, Guangzhou, China
- Corresponding authors. Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, No. 56 Ling Yuan Xi Road, Guangzhou, China. Fax: +8620 83822807.
| | - Meng Xu
- Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, No. 56 Ling Yuan Xi Road, Guangzhou, China
- Guangdong Provincial Key Laboratory of Stomatology, No. 56 Ling Yuan Xi Road, Guangzhou, China
- Corresponding authors. Guanghua School of Stomatology, Hospital of Stomatology, Sun Yat-sen University, No. 56 Ling Yuan Xi Road, Guangzhou, China. Fax: +8620 83822807.
| |
Collapse
|
3
|
Park JB. Application of enamel matrix derivative and deproteinized bovine bone for the treatment of peri-implantitis after decontamination with an ultrasonic scaler: A case report. Medicine (Baltimore) 2018; 97:e13461. [PMID: 30508970 PMCID: PMC6283095 DOI: 10.1097/md.0000000000013461] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
RATIONALE The purpose of this report is to present a case of peri-implantitis with successful regeneration. The surface of the affected dental implant was decontaminated with an ultrasonic scaler and treated with bovine-derived hydroxyapatite and enamel matrix derivative. PATIENT CONCERNS A 52-year-old male was referred for evaluation of a dental implant placed in the mandibular right second premolar area. DIAGNOSIS The radiographic evaluation showed the loss of supporting bone around the dental implant. Bleeding upon probing and suppuration were observed, with the deepest probing depth at 6 mm. INTERVENTIONS The area was firstly treated with a nonsurgical approach. After re-evaluation, a full-thickness flap was elevated. The area was well debrided using various instruments, including curettes and an ultrasonic scaler. The defect area was grafted with bovine-derived hydroxyapatite and enamel matrix derivative. OUTCOMES Histopathologic evaluation revealed chronic inflammation with fibrosis and calcification. The evaluation at 2 years and 3 months after surgery showed that the prosthesis was functioning well. Bleeding upon probing and suppuration was not noted, and reduction of probing depth was seen, with the deepest depth at 4 mm. The area showed maintenance of graft material with increased radiopacity around the dental implant. LESSONS In conclusion, a case of peri-implantitis can be successfully treated with bovine-derived hydroxyapatite and enamel matrix derivative after surface decontamination with an ultrasonic scaler.
Collapse
|
4
|
Sudhakar R, Pratebha B. Fibrous architecture of cementodentinal junction in disease: A scanning electron microscopic study. J Oral Maxillofac Pathol 2016; 19:325-9. [PMID: 26980960 PMCID: PMC4774285 DOI: 10.4103/0973-029x.174623] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Background: The cementodentinal junction (CDJ) forms a biological and structural link between cementum and dentin. This biological link is regarded as a distinct tissue in its own right. Certain important proteins responsible for periodontal regeneration are said to be present in this tissue. Few studies have described the structure and composition of this layer by light and electron microscopy. Scanning electron microscopic studies pertaining to CDJ in health and disease are few and documentation of periodontal pathological changes of CDJ is unclear. In the first phase of our study, the collagenous architecture of CDJ of healthy teeth has been reported. Aim: The objective of this study is to observe and report periodontal pathological changes in the fibrous or collagenous architecture of CDJ of periodontitis-affected teeth and discuss the probable clinical implications of CDJ in disease. Materials and Methods: Twenty periodontitis-affected teeth were collected and processed for observing under a scanning electron microscope. Results: The results are as follows: Increased width of interface at CDJ in periodontitis samples (7.1 μ) compared to that of healthy samples; fewer areas of fiber intermingling at CDJ in periodontitis samples as compared to healthy samples; frequent detachment of cementum from dentin during sodium hydroxide maceration of samples. Conclusion: It may be inferred from results that there is a possibility of a definite weakening of CDJ in periodontally affected root surfaces and we believe that clinical procedures such as scaling and root planning may have a detrimental effect on the cementodentinal attachment of periodontally involved root surfaces.
Collapse
Affiliation(s)
- R Sudhakar
- Department of Oral Pathology, Sri Venkateshwaraa Dental College, Ariyur, Puducherry, India
| | - B Pratebha
- Department of Periodontics, Indira Gandhi Institute of Dental Sciences, SBVU, Puducherry, India
| |
Collapse
|
5
|
Li L, Zhu Z, Xiao W, Li L. Multi-walled carbon nanotubes promote cementoblast differentiation and mineralization through the TGF-β/Smad signaling pathway. Int J Mol Sci 2015; 16:3188-201. [PMID: 25648319 PMCID: PMC4346888 DOI: 10.3390/ijms16023188] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2014] [Revised: 01/19/2015] [Accepted: 01/26/2015] [Indexed: 02/05/2023] Open
Abstract
Excretion of cementum by cementoblasts on the root surface is a process indispensable for the formation of a functional periodontal ligament. This study investigated whether carboxyl group-functionalized multi-walled carbon nanotubes (MWCNT-COOH) could enhance differentiation and mineralization of mammalian cementoblasts (OCCM-30) and the possible signaling pathway involved in this process. Cementoblasts were incubated with various doses of MWCNT-COOH suspension. Cell viability was detected, and a scanning electron microscopy (SEM) observed both the nanomaterials and the growth of cells cultured with the materials. Alizarin red staining was used to investigate the formation of calcium deposits. Real-time PCR and western blot were used to detect cementoblast differentiation and the underlying mechanisms through the expression of the osteogenic genes and the downstream effectors of the TGF-β/Smad signaling. The results showed that 5 µg/mL MWCNT-COOH had the most obvious effects on promoting differentiation without significant toxicity. Alp, Ocn, Bsp, Opn, Col1 and Runx2 gene expression was up-regulated. Smad2 and Smad3 mRNA was up-regulated, while Smad7 was first down-regulated on Day 3 and later up-regulated on Day 7. The elevated levels of phospho-Smad2/3 were also confirmed by western blot. In sum, the MWCNT-COOH promoted cementoblast differentiation and mineralization, at least partially, through interactions with the TGF-β/Smad pathway.
Collapse
Affiliation(s)
- Lu Li
- State Key Laboratory of Oral Diseases, Department of Prosthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China.
| | - Zhimin Zhu
- State Key Laboratory of Oral Diseases, Department of Prosthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China.
| | - Weixiong Xiao
- State Key Laboratory of Oral Diseases, Department of Prosthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China.
| | - Lei Li
- State Key Laboratory of Oral Diseases, Department of Prosthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China.
| |
Collapse
|
6
|
Arzate H, Zeichner-David M, Mercado-Celis G. Cementum proteins: role in cementogenesis, biomineralization, periodontium formation and regeneration. Periodontol 2000 2014; 67:211-33. [DOI: 10.1111/prd.12062] [Citation(s) in RCA: 74] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/26/2014] [Indexed: 12/11/2022]
|
7
|
Gasic J, Kesic L, Popovic J, Mitić A, Nikolic M, Stankovic S, Barac R. Ultrastructural changes in the cemento-enamel junction after vital tooth bleaching with fluoride and fluoride-free agents - a pilot study. Med Sci Monit 2012; 18:PR5-12. [PMID: 22367139 PMCID: PMC3560748 DOI: 10.12659/msm.882502] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Background The impact of bleaching on the cemento-enamel junction (CEJ) is not well known. Due to frequent sensitivity of the cervical region of teeth after the vital bleaching, the aim of the present study was to evaluate the morphological features of the CEJ of human teeth after application of fluoridated and fluoride-free bleaching agents, as well as post-bleaching fluoridation treatment, by scanning electron microscopy (SEM) analysis. Material/Methods Thirty-five extracted permanent human teeth were longitudinally cut, yielding 70 specimens. Thirty specimens were randomly divided into the 3 experimental groups, and 20 specimens, were used as (2) control groups, each: negative (untreated) control group; positive control group treated with 35% hydrogen peroxide; experimental group 1, bleaching with 10% carbamide peroxide (CP); experimental group 2, treatment with a mixture of 10% CP and fluoride; and experimental group 3, treatment with 10% CP and 2% sodium fluoride gel applied 30 minutes after bleaching. Experimental groups were treated 8 h per day for 14 days. The samples were examined by SEM. Results The bleaching materials tested caused morphological changes to the surface of the CEJ. There was a statistically significant difference between experimental groups (Kruskal Wallis Test chi-square=11,668; p<0.005). Mean value of experimental group 2 scores showed statistically significant difference from groups 1 and 3. Conclusions Bleaching gel with fluorides does not significantly change morphological appearance of the CEJ and represents a better choice than the hard tissue fluoridation process after bleaching.
Collapse
Affiliation(s)
- Jovanka Gasic
- Department of Restorative Dentistry and Endodontics, Clinic of Dentistry, Medical Faculty, University of Nis, Nis, Serbia.
| | | | | | | | | | | | | |
Collapse
|
8
|
Consolaro A, Consolaro RB, Francischone LA. Cementum, apical morphology and hypercementosis: a probable adaptive response of the periodontal support tissues and potential orthodontic implications. Dental Press J Orthod 2012. [DOI: 10.1590/s2176-94512012000100003] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
|
9
|
Ren L, Wang W, Takao Y, Chen Z. Effects of cementum–dentine junction and cementum on the mechanical response of tooth supporting structure. J Dent 2010; 38:882-91. [DOI: 10.1016/j.jdent.2010.07.013] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2009] [Revised: 07/07/2010] [Accepted: 07/31/2010] [Indexed: 10/19/2022] Open
|
10
|
Jue SS, Lee WY, Kwon YD, Kim YR, Pae A, Lee B. The effects of enamel matrix derivative on the proliferation and differentiation of human mesenchymal stem cells. Clin Oral Implants Res 2010; 21:741-6. [DOI: 10.1111/j.1600-0501.2009.01901.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
|
11
|
Affiliation(s)
- Margarita Zeichner-David
- Centre for Craniofacial Molecular Biology, School of Dentistry, Division of Surgical, Therapeutics and Bioengineering Sciences, University of Southern California, Los Angeles, California, USA
| |
Collapse
|
12
|
Hägewald S, Pischon N, Jawor P, Bernimoulin JP, Zimmermann B. Effects of enamel matrix derivative on proliferation and differentiation of primary osteoblasts. ACTA ACUST UNITED AC 2004; 98:243-9. [PMID: 15316552 DOI: 10.1016/j.tripleo.2004.02.063] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
OBJECTIVE The aim of this study was to investigate the effects of enamel matrix derivative (EMD) on proliferation, protein synthesis, and mineralization in primary mouse osteoblasts. STUDY DESIGN Osteoblasts were obtained from mouse calvaria by enzymatic digestion and grown in monolayer together with EMD (2-100 microg/ml). Metabolic activity and cell proliferation were determined by tetrazolium salt assay (MTT) and by 5-bromo-2'-deoxyuridine (BrdU) incorporation. For differentiation studies, a 3-dimensional organoid culture system was used. Osteoblastic differentiation was estimated by alkaline phosphatase (ALP) activity and calcium content. Collagen synthesis was assessed by [(3)H]-proline incorporation. Morphologic observations were made by electron microscopy. RESULTS EMD treatments increased metabolic cell activity and BrdU incorporation. In the organoid cultures, ALP activity and calcium accumulation were enhanced by EMD treatment, but [(3)H]-proline incorporation was not. Morphologically, an increased deposition of mineralized nodules was found. CONCLUSIONS EMD treatment enhanced cellular activities of primary osteoblasts and might support the regeneration of periodontal bony defects.
Collapse
|
13
|
Pack AR. Periodontal Considerations In Endo/Perio Lesions. AUST ENDOD J 2001. [DOI: 10.1111/j.1747-4477.2001.tb00456.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
14
|
Yamamoto T, Domon T, Takahashi S, Islam N, Suzuki R, Wakita M. The structure and function of the cemento-dentinal junction in human teeth. J Periodontal Res 1999; 34:261-8. [PMID: 10567949 DOI: 10.1111/j.1600-0765.1999.tb02252.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The structure and function of the cemento-dentinal junction were studied in human molars by light and electron microscopy. The cemento-dentinal junction was an approximately 1-3-micron-thick layer full of proteoglycans with mucopolysaccharides but containing fewer collagen fibrils than the root dentin and cementum. In places, cemental fibrils crossed the cemento-dentinal junction. These fibrils appeared to intermingle with dentinal fibrils. By enzymatic treatment of decalcified specimen with hyaluronidase and trypsin, the cemento-dentinal junction decreased or lost staining affinity to toluidine blue. Prolonged treatment caused the separation of cementum from the root dentin during routine histological processes. These data suggest that the adhesion of proteoglycans is more important than the intermingling of dentinal and cemental fibrils for the cemento-dentinal attachment.
Collapse
Affiliation(s)
- T Yamamoto
- Department of Oral Anatomy II, Hokkaido University School of Dentistry, Sapporo, Japan
| | | | | | | | | | | |
Collapse
|
15
|
Chen SY, Wang HL, Glickman GN. The influence of endodontic treatment upon periodontal wound healing. J Clin Periodontol 1997; 24:449-56. [PMID: 9226384 DOI: 10.1111/j.1600-051x.1997.tb00211.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The interrelationship between periodontal and endodontic disease has aroused much speculation, confusion, and controversy. Pulpal and periodontal problems are responsible for more than 50% of tooth mortality today. Diagnosis is often difficult since these diseases have been studied primarily as separate entities. The toxic substances of the pulp may initiate periodontal defects through canal ramifications and patent dentinal tubules, thus impairing wound healing in regenerative procedures. Although no studies exist addressing the direct effect of pulpal infection on the outcome of guided tissue regeneration (GTR) procedures, several studies do indicate that pulpal status may play a significant role toward the end results of GTR. This review article discusses the potential influence of endodontic treatment on the long-term outcomes of GTR. Potential pathways between the pulp and periodontal ligament, which may be responsible for the failure of the regeneration of new periodontal attachment apparatus, are explored. Examination and review of the clinical and research findings in the literature relating to perio-endo lesions are made to demonstrate that a negative influence may exist between GTR outcomes and the status of the pulp.
Collapse
Affiliation(s)
- S Y Chen
- Department of Dentistry, Cathay General Hospital, Taipei, Taiwan, ROC
| | | | | |
Collapse
|