Pub Date : 2022-12-14DOI: 10.12974/2311-8695.2022.10.04
Maria de Lourdes Vieira Frujeri, Bruna Mirelli DE LIMA DA ROCHA, Leandro Henrique BALARINE MELO
Introduction: Endoguide is a device that has significantly aids the treatment of calcified root canals. This device involves modern technologies as 3D printing and computed tomography, which increase the accuracy of dental work. Guided endodontics has currently been emphasized because it facilitates more complex endodontic treatments, such as partial or total obliteration of the root canals precluding the conventional endodontic treatment. This method has demonstrated high percentages of safety for both patient and dentist. It is a fast endodontic access system that prevents perforations, unnecessary removal of dentin and tooth structure. This treatment method is more effective than conventional methods for locating calcified root canals due to its accuracy, speed of time and precision of direction. Objective: To review the current literature on Endoguide in calcified root canals, analyze its practice, advantages, disadvantages, indications and limitations. Material and Methods: The study was conducted on 20 papers in Portuguese and English from the year 2016 to April 2022, and a classic article from year 1995, searched in the databases PubMed, Google Scholar and Bireme. The following keywords were used: Calcified canal, Guided endodontics, Endodontic access, Endoguide. Results: This technique showed greater predictability in calcified canals, reducing the risk of perforations and allowing faster and more efficient access, with many advantages, except for its high cost. Conclusion: Based on this literature review, it can be suggested that the Endoguide technique in calcified canals provides great benefits to both dentist and patient, such as reduction of clinical time, agility and confidence in treatment, reduced risk of accidents and complications such as perforations and unnecessary dentin removal.
{"title":"Guided Endodontics in Calcified Root Canals","authors":"Maria de Lourdes Vieira Frujeri, Bruna Mirelli DE LIMA DA ROCHA, Leandro Henrique BALARINE MELO","doi":"10.12974/2311-8695.2022.10.04","DOIUrl":"https://doi.org/10.12974/2311-8695.2022.10.04","url":null,"abstract":"Introduction: Endoguide is a device that has significantly aids the treatment of calcified root canals. This device involves modern technologies as 3D printing and computed tomography, which increase the accuracy of dental work. Guided endodontics has currently been emphasized because it facilitates more complex endodontic treatments, such as partial or total obliteration of the root canals precluding the conventional endodontic treatment. This method has demonstrated high percentages of safety for both patient and dentist. It is a fast endodontic access system that prevents perforations, unnecessary removal of dentin and tooth structure. This treatment method is more effective than conventional methods for locating calcified root canals due to its accuracy, speed of time and precision of direction. \u0000Objective: To review the current literature on Endoguide in calcified root canals, analyze its practice, advantages, disadvantages, indications and limitations. \u0000Material and Methods: The study was conducted on 20 papers in Portuguese and English from the year 2016 to April 2022, and a classic article from year 1995, searched in the databases PubMed, Google Scholar and Bireme. The following keywords were used: Calcified canal, Guided endodontics, Endodontic access, Endoguide. \u0000Results: This technique showed greater predictability in calcified canals, reducing the risk of perforations and allowing faster and more efficient access, with many advantages, except for its high cost. \u0000Conclusion: Based on this literature review, it can be suggested that the Endoguide technique in calcified canals provides great benefits to both dentist and patient, such as reduction of clinical time, agility and confidence in treatment, reduced risk of accidents and complications such as perforations and unnecessary dentin removal.","PeriodicalId":76664,"journal":{"name":"The Journal of the American College of Dentists","volume":"30 5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78896481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-11-28DOI: 10.12974/2311-8695.2022.10.03
I. H. Ismail, N. Razak, N. Ramzi, M.Y.P. Mohd Yusof
A systematic review was performed to compare the human dentin microtensile bond strength of universal adhesives with 10-MDP when used as total-etch and self-etch strategies. Literature search was done on October 2019 without limitations on the language of publication, in four databases: PubMed, Web of Science, Scopus, and EBSCO. Additional manual search was done for the grey literature articles: OpenGrey and OpenThesis. Studies that evaluated the dentin bond strength of universal adhesives with 10-MDP using total-etch and self-etch strategy from the year 2000 up till October 2019 were included. The initial search resulted in 5121 references: 2234 from PubMed, 1814 from Scopus, 516 from Web of Science, 553 from EBSCO and 4 from OpenThesis. After full text analysis, 30 references were included in this systematic review. Seven different universal adhesives with 10-MDP were evaluated for dentin microtensile bond strength comparing total-etch and self-etch strategies: Single Bond Universal/Scotchbond Universal (3M ESPE), All Bond Universal (Bisco), Clearfil Universal Bond (Kuraray), G-Premio Bond (GC Corp), Tetric Bond Universal (Ivoclar Vivadent), Ambar Universal (FGM) and One Coat 7 Universal (Coltene). The total-etch strategy improved the dentine microtensile bond strength compared to self-etch strategy for all universal adhesives when stored in all three conditions: 24h, thermocycling and long-term immersion according to ISO (TS 11405:2015(E)). The evidence suggests that microtensile bond strength of universal adhesives containing 10-MDP may be improved utilizing total-etch strategy compared to self-etch strategy. This study provides valuable information on the importance of appropriate dentin adhesives strategy that affect success rate of restorations, which helps clinicians to make informed decisions on the strategy to be used during restorations in practice.
本文比较了10-MDP和通用胶粘剂在全蚀刻和自蚀刻两种策略下的牙本质微拉伸结合强度。文献检索于2019年10月在PubMed、Web of Science、Scopus和EBSCO四个数据库中完成，不受出版语言的限制。对灰色文献文章进行了额外的人工搜索:OpenGrey和OpenThesis。从2000年到2019年10月，采用全蚀刻和自蚀刻策略评估了10-MDP通用胶粘剂的牙本质结合强度。最初的搜索结果是5121篇参考文献:2234篇来自PubMed, 1814篇来自Scopus, 516篇来自Web of Science, 553篇来自EBSCO, 4篇来自OpenThesis。经全文分析，本系统综述共收录文献30篇。7种不同的10-MDP万能粘合剂对牙本质微拉伸粘结强度进行了评估，并比较了全蚀和自蚀策略:Single bond universal /Scotchbond universal (3M ESPE)、All bond universal (Bisco)、Clearfil universal bond (Kuraray)、G-Premio bond (GC Corp)、Tetric bond universal (ivocar Vivadent)、Ambar universal (FGM)和One Coat 7 universal (Coltene)。根据ISO (TS 11405:2015(E))，在24小时、热循环和长期浸泡三种条件下，与自蚀策略相比，全蚀刻策略提高了所有通用粘合剂的牙本质微拉伸结合强度。结果表明，采用全蚀刻方法可以提高10-MDP通用胶粘剂的微拉伸强度。本研究为牙本质粘接剂策略对修复成功率的影响提供了有价值的信息，有助于临床医生在实际修复过程中做出明智的决策。
{"title":"Microtensile Bond Strength of Total-Etch and Self-Etch Universal Adhesives Containing 10-MDP: A Systematic Review","authors":"I. H. Ismail, N. Razak, N. Ramzi, M.Y.P. Mohd Yusof","doi":"10.12974/2311-8695.2022.10.03","DOIUrl":"https://doi.org/10.12974/2311-8695.2022.10.03","url":null,"abstract":"A systematic review was performed to compare the human dentin microtensile bond strength of universal adhesives with 10-MDP when used as total-etch and self-etch strategies. Literature search was done on October 2019 without limitations on the language of publication, in four databases: PubMed, Web of Science, Scopus, and EBSCO. Additional manual search was done for the grey literature articles: OpenGrey and OpenThesis. Studies that evaluated the dentin bond strength of universal adhesives with 10-MDP using total-etch and self-etch strategy from the year 2000 up till October 2019 were included. The initial search resulted in 5121 references: 2234 from PubMed, 1814 from Scopus, 516 from Web of Science, 553 from EBSCO and 4 from OpenThesis. After full text analysis, 30 references were included in this systematic review. Seven different universal adhesives with 10-MDP were evaluated for dentin microtensile bond strength comparing total-etch and self-etch strategies: Single Bond Universal/Scotchbond Universal (3M ESPE), All Bond Universal (Bisco), Clearfil Universal Bond (Kuraray), G-Premio Bond (GC Corp), Tetric Bond Universal (Ivoclar Vivadent), Ambar Universal (FGM) and One Coat 7 Universal (Coltene). The total-etch strategy improved the dentine microtensile bond strength compared to self-etch strategy for all universal adhesives when stored in all three conditions: 24h, thermocycling and long-term immersion according to ISO (TS 11405:2015(E)). The evidence suggests that microtensile bond strength of universal adhesives containing 10-MDP may be improved utilizing total-etch strategy compared to self-etch strategy. This study provides valuable information on the importance of appropriate dentin adhesives strategy that affect success rate of restorations, which helps clinicians to make informed decisions on the strategy to be used during restorations in practice.","PeriodicalId":76664,"journal":{"name":"The Journal of the American College of Dentists","volume":"77 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83911662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-10-28DOI: 10.12974/2311-8695.2022.10.2
Paula Piekoszewska-Ziętek
Antibiotics are commonly used in medicine and dentistry for both preventive and therapeutic reasons. They are most widely prescribed medications in paediatric dentistry. According to the literature, approximately 7-11% of antibiotic therapy is prescribed by dentists. The most commonly used are β-lactam antibiotics, macrolides, tetracyclines, clindamycin, metronidazole. Unrestricted use of antibiotics is a cause of growing bacterial resistance. The aim of the study was to review the literature for the clinical indications, dosages, and duration of antibiotic therapy in the field of peadiatric dentistry. The author reviewed the scientific literature and for evidence regarding the use of antibiotics to prevent local and systemic infections associated with dental treatment in children. Actual recommendations and clues for clinician are provided in this article.
{"title":"The use of Antibiotics in Paediatric Dentistry: A Revision of Current Recommendations","authors":"Paula Piekoszewska-Ziętek","doi":"10.12974/2311-8695.2022.10.2","DOIUrl":"https://doi.org/10.12974/2311-8695.2022.10.2","url":null,"abstract":"Antibiotics are commonly used in medicine and dentistry for both preventive and therapeutic reasons. They are most widely prescribed medications in paediatric dentistry. According to the literature, approximately 7-11% of antibiotic therapy is prescribed by dentists. The most commonly used are β-lactam antibiotics, macrolides, tetracyclines, clindamycin, metronidazole. Unrestricted use of antibiotics is a cause of growing bacterial resistance. The aim of the study was to review the literature for the clinical indications, dosages, and duration of antibiotic therapy in the field of peadiatric dentistry. The author reviewed the scientific literature and for evidence regarding the use of antibiotics to prevent local and systemic infections associated with dental treatment in children. Actual recommendations and clues for clinician are provided in this article.","PeriodicalId":76664,"journal":{"name":"The Journal of the American College of Dentists","volume":"41 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74201450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-06-14DOI: 10.12974/2311-8695.2022.10.1
Yen-Hao Chang, Yan-ting Pan, C. Chao, Huey-Er Lee, Ju-Hui Wu
The purpose of this study was to investigate the corrosion behavior of four different dental casting alloys in artificial saliva solutions with varying pH values. Microstructures were observed using scanning electron microscopy. The corrosion behavior of the experimental alloys in artificial saliva was examined using potentiodynamic polarization measurements. The high noble alloy (Au-8.5Pt-2.6Pd-1.4In) exhibited better corrosion resistance with lower anodic current densities in the pH range of 3–5. The anodic current density of the noble alloy (Au-24.9Pd-19.0Ag-5.5In) decreased as the pH decreased. The noble (Pd-37.7Ag-8.5Sn) and base metal (Ni-25Cr-11.5Mo-1.4Si) alloys exhibited lower corrosion resistance with a relatively high current density at pH 3. Compared with noble alloys, base metal alloys exhibited good corrosion resistance in this study. This makes them a promising material for dental castings considering the complex pH changes in the oral environment.
{"title":"Corrosion Behavior of Dental Alloys Under Artificial Saliva Solution with Different pH Values","authors":"Yen-Hao Chang, Yan-ting Pan, C. Chao, Huey-Er Lee, Ju-Hui Wu","doi":"10.12974/2311-8695.2022.10.1","DOIUrl":"https://doi.org/10.12974/2311-8695.2022.10.1","url":null,"abstract":"The purpose of this study was to investigate the corrosion behavior of four different dental casting alloys in artificial saliva solutions with varying pH values. Microstructures were observed using scanning electron microscopy. The corrosion behavior of the experimental alloys in artificial saliva was examined using potentiodynamic polarization measurements. The high noble alloy (Au-8.5Pt-2.6Pd-1.4In) exhibited better corrosion resistance with lower anodic current densities in the pH range of 3–5. The anodic current density of the noble alloy (Au-24.9Pd-19.0Ag-5.5In) decreased as the pH decreased. The noble (Pd-37.7Ag-8.5Sn) and base metal (Ni-25Cr-11.5Mo-1.4Si) alloys exhibited lower corrosion resistance with a relatively high current density at pH 3. Compared with noble alloys, base metal alloys exhibited good corrosion resistance in this study. This makes them a promising material for dental castings considering the complex pH changes in the oral environment.","PeriodicalId":76664,"journal":{"name":"The Journal of the American College of Dentists","volume":"111 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79023977","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-30DOI: 10.12974/2311-8695.2021.09.5
A. Comba, A. Baldi, M. Bonito, E. Blanc, V. Notaro, M. Alovisi, D. Pasqualini, E. Berutti, N. Scotti
Purpose: The aim of this in vitro study was to investigate differences in surface wear of enamel-material and dentin-material bonded interfaces obtained from upper molars samples and subjected to cycling occlusal load. Methods: Forty-eight flat specimens of enamel-material and dentin-material bonded interfaces were prepared using different restorative materials with both CAD-CAM techniques and direct techniques. After the bonding and cementation procedures specimens were tested with a chewing machine with a stainless-steel ball on flat sliding contact (20N loads, 50.000 cycles). Wear analysis and comparison of the enamel or dentin substrates and the three restorative materials was performed using a 3D profilometer and analyzed with ANOVA test and post-hoc comparison procedures. Finally worn surfaces were examined with optical microscopy. Results: Statistical analysis after simulated chewing cycles identified a significant influence of the factor “substrate” (p<0.05) and of the factor “restorative material” (p<0.05). The enamel results in being more wear resistant than dentin, and also more resistant than all the restorative materials tested. Considering the materials, the most severe wear loss was observed with micro-hybrid composite paste. CAD-CAM materials showed a wear rate significantly better both in association with enamel and dentin. An interesting wear pattern was found at the bonded interface level and the oval shapes obtained from the profilometer images underlined a repetitive wear pattern with the central zone more consumed and decreasing depth moving towards the perimeter. Initials signs of cracks were showed in enamel interfaces at the optical microscopy analysis. Conclusions: Both the dental substrate and the restorative material significantly affect the wear behavior of a toothmaterial interface after cyclic fatigue. Thus, the initial null hypotheses were rejected.
{"title":"Wear Patterns of Adhesive Interfaces over Different Materials","authors":"A. Comba, A. Baldi, M. Bonito, E. Blanc, V. Notaro, M. Alovisi, D. Pasqualini, E. Berutti, N. Scotti","doi":"10.12974/2311-8695.2021.09.5","DOIUrl":"https://doi.org/10.12974/2311-8695.2021.09.5","url":null,"abstract":"Purpose: The aim of this in vitro study was to investigate differences in surface wear of enamel-material and dentin-material bonded interfaces obtained from upper molars samples and subjected to cycling occlusal load. \u0000Methods: Forty-eight flat specimens of enamel-material and dentin-material bonded interfaces were prepared using different restorative materials with both CAD-CAM techniques and direct techniques. After the bonding and cementation procedures specimens were tested with a chewing machine with a stainless-steel ball on flat sliding contact (20N loads, 50.000 cycles). Wear analysis and comparison of the enamel or dentin substrates and the three restorative materials was performed using a 3D profilometer and analyzed with ANOVA test and post-hoc comparison procedures. Finally worn surfaces were examined with optical microscopy. \u0000Results: Statistical analysis after simulated chewing cycles identified a significant influence of the factor “substrate” (p<0.05) and of the factor “restorative material” (p<0.05). The enamel results in being more wear resistant than dentin, and also more resistant than all the restorative materials tested. Considering the materials, the most severe wear loss was observed with micro-hybrid composite paste. CAD-CAM materials showed a wear rate significantly better both in association with enamel and dentin. An interesting wear pattern was found at the bonded interface level and the oval shapes obtained from the profilometer images underlined a repetitive wear pattern with the central zone more consumed and decreasing depth moving towards the perimeter. Initials signs of cracks were showed in enamel interfaces at the optical microscopy analysis. \u0000Conclusions: Both the dental substrate and the restorative material significantly affect the wear behavior of a toothmaterial interface after cyclic fatigue. Thus, the initial null hypotheses were rejected.","PeriodicalId":76664,"journal":{"name":"The Journal of the American College of Dentists","volume":"117 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73545159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-10DOI: 10.12974/2311-8695.2021.09.4
N. Haider, R. Nagpal, U. Singh, M. Umar, Nida Mehmood
Aim: To evaluate the effect of different etching modes on the bonding efficacy of two universal adhesives to enamel. Materials and method: The study was performed in fifty five extracted human molar teeth. For shear bond strength testing, flat buccal surfaces were prepared. Teeth were randomly divided into five experimental groups according to two universal adhesives Single Bond Universal (3M ESPE, U.S.A) and Tetric N-Bond Universal (IvoclarVivadent) used in different etching modes i.e etch-and-rinse and self-etch mode and one control group of etch & rinse adhesive (Adper Single bond-2). Teeth were mounted in self-cure acrylic resin and composite restorations were placed in all the samples after application of adhesives according to the manufacturer’s instructions. Ten samples from each group were subjected to shear bond strength evaluation. Additionally one sample per group was subjected to scanning electron microscopic analysis for observing resin-enamel interfacial adaptation. Statistical analysis: Data collected was subjected to statistical analysis using one –way ANOVA and post-hoc tukey’s test at a significant level of p<0.05. Results: Enamel bond strength was significantly better in etch-and-rinse mode than the self etch mode for both Single Bond Universal (gp 2 & 3; p=0.017) and Tetric N-Bond Universal adhesives (gp 4 & 5; p=0.046) respectively. Conclusion: Phosphoric acid etching of enamel prior to the application of a mild universal adhesive is an advisable strategy for optimizing bonding.
目的:评价不同蚀刻方式对两种通用胶粘剂对牙釉质粘接效果的影响。材料与方法:以55颗拔除的人磨牙为研究对象。为了进行剪切粘结强度测试，我们制作了平坦的口腔表面。根据两种通用粘合剂Single Bond universal (3M ESPE, usa)和Tetric N-Bond universal (IvoclarVivadent)在不同蚀刻模式(蚀刻冲洗和自蚀刻模式)下的使用情况，将牙齿随机分为5个实验组和一个蚀刻冲洗粘合剂(Adper Single Bond -2)对照组。牙齿安装在自固化丙烯酸树脂中，根据制造商的说明在应用粘合剂后将复合修复体放置在所有样品中。每组取10个样品进行剪切粘结强度评价。每组取1个样品进行扫描电镜分析，观察树脂-牙釉质界面的适应情况。统计分析:收集的资料采用单因素方差分析(one -way ANOVA)和事后检验(post-hoc tukey’s)进行统计分析，p<0.05为显著水平。结果:单键通用型(gp 2 & 3;p=0.017)和Tetric N-Bond通用胶粘剂(gp 4 & 5;分别p = 0.046)。结论:在应用温和的通用粘接剂前进行磷酸腐蚀是优化牙釉质粘接的可取策略。
{"title":"Effect of Different Etching Modes on Shear Bond Strength of Universal Adhesives to Enamel","authors":"N. Haider, R. Nagpal, U. Singh, M. Umar, Nida Mehmood","doi":"10.12974/2311-8695.2021.09.4","DOIUrl":"https://doi.org/10.12974/2311-8695.2021.09.4","url":null,"abstract":"Aim: To evaluate the effect of different etching modes on the bonding efficacy of two universal adhesives to enamel. \u0000Materials and method: The study was performed in fifty five extracted human molar teeth. For shear bond strength testing, flat buccal surfaces were prepared. Teeth were randomly divided into five experimental groups according to two universal adhesives Single Bond Universal (3M ESPE, U.S.A) and Tetric N-Bond Universal (IvoclarVivadent) used in different etching modes i.e etch-and-rinse and self-etch mode and one control group of etch & rinse adhesive (Adper Single bond-2). Teeth were mounted in self-cure acrylic resin and composite restorations were placed in all the samples after application of adhesives according to the manufacturer’s instructions. Ten samples from each group were subjected to shear bond strength evaluation. Additionally one sample per group was subjected to scanning electron microscopic analysis for observing resin-enamel interfacial adaptation. \u0000Statistical analysis: Data collected was subjected to statistical analysis using one –way ANOVA and post-hoc tukey’s test at a significant level of p<0.05. \u0000Results: Enamel bond strength was significantly better in etch-and-rinse mode than the self etch mode for both Single Bond Universal (gp 2 & 3; p=0.017) and Tetric N-Bond Universal adhesives (gp 4 & 5; p=0.046) respectively. \u0000Conclusion: Phosphoric acid etching of enamel prior to the application of a mild universal adhesive is an advisable strategy for optimizing bonding.","PeriodicalId":76664,"journal":{"name":"The Journal of the American College of Dentists","volume":"41 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90659487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-09DOI: 10.12974/2311-8695.2021.09.3
E. Bakır, Şeyhmus Bakır, B. Deveci, F. Şahin, F. Aşır, E. Deveci
In this study, we aimed to investigate the histopathological changes on 14th and 28th days in the dental pulp of ovariectomized rats. Twenty 12-week-old 21 female Sprague Dawleys were divided into 3 groups. Group 1: No procedure was applied to the animals. All teeth were excised at the end of the experiment (at the 14th day of experiment). Group 2: The abdomen was opened and the ovary tied with 3/0 silk sutures to block blood supply. The ovaries were placed in its original position. Teeth of ovariectomized rats were excised at the 14th day of experiment. Group 3: Similar procedure was applied as in Group 2. The teeth were removed on 28th days of experiment. The dental tissues taken after the experiment were processed for routine paraffin wax tissue preparation. Hematoxylin-Eosin staining was applied to sections of 4 μm thickness. As a result, when compared to the dental pulp of control group, degenerated dental pulp tissue, vascular dilatation and pyknotic osteoblast cells were observed in ovariectomized rats, however the pathological intesity was higher in ovariectomized rats for 28 days than ovariectomized rats for 14 days.
{"title":"Investigation of Changes in Dental Pulp Tissue in Rats with Bilateral Ovariectomy by Histopathological Methods","authors":"E. Bakır, Şeyhmus Bakır, B. Deveci, F. Şahin, F. Aşır, E. Deveci","doi":"10.12974/2311-8695.2021.09.3","DOIUrl":"https://doi.org/10.12974/2311-8695.2021.09.3","url":null,"abstract":"In this study, we aimed to investigate the histopathological changes on 14th and 28th days in the dental pulp of ovariectomized rats. Twenty 12-week-old 21 female Sprague Dawleys were divided into 3 groups. Group 1: No procedure was applied to the animals. All teeth were excised at the end of the experiment (at the 14th day of experiment). Group 2: The abdomen was opened and the ovary tied with 3/0 silk sutures to block blood supply. The ovaries were placed in its original position. Teeth of ovariectomized rats were excised at the 14th day of experiment. Group 3: Similar procedure was applied as in Group 2. The teeth were removed on 28th days of experiment. The dental tissues taken after the experiment were processed for routine paraffin wax tissue preparation. Hematoxylin-Eosin staining was applied to sections of 4 μm thickness. As a result, when compared to the dental pulp of control group, degenerated dental pulp tissue, vascular dilatation and pyknotic osteoblast cells were observed in ovariectomized rats, however the pathological intesity was higher in ovariectomized rats for 28 days than ovariectomized rats for 14 days.","PeriodicalId":76664,"journal":{"name":"The Journal of the American College of Dentists","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78698056","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-02DOI: 10.12974/2311-8695.2021.09.1
José Raimundo Soares de Carvalho, Josélia da Silva Leite, Rudyard dos Santos Oliveira
The aim of the study was to define the prevalence of impacted lower third molars using cone beam computed tomography and to classify according to Winter, Pell and Gregory and Maglione. The sample consisted of 250 CBCT exams. The evaluation of the selected images was performed using CS 3D imaging software using axial, cross-section and panoramic reconstruction sections. Data collection was performed by filling out the forms containing the classifications of Winter, Pell and Gregory and Maglione. Data analysis was performed through the distribution of frequencies (absolute and relative) associated with the construction of 95% confidence intervals of proportions. Of the 250 tomography exams analyzed, 113 (45.2%) were male and 137 (54.8%) were female. The positions and differences between the most frequent sides according to the Winter, Pell & Gregory and Maglione classification, respectively, were: Mesioangular - 29.8% (95% CI: 25.8% -33.8%), right side (30.4 %), left side (29.2%); Class II - 31.2% (95% CI: 27.1% -35.3%); position A, right side (30.4%) left side (32.0%); Class 1A - 39.8% (95% CI: 35.5% -44.1%), right side (40.0%), left side (39.6%). Thus, there was a higher prevalence in the mesioangular position according to the Winter classification and, in relation to the Pell and Gregory classification, the class II / A position; while, according to Maglione's classification, the most prevalent position is Class 1A.
{"title":"Evaluation of Impacted Lower Third Molars Using Cone Beam Computed Tomography","authors":"José Raimundo Soares de Carvalho, Josélia da Silva Leite, Rudyard dos Santos Oliveira","doi":"10.12974/2311-8695.2021.09.1","DOIUrl":"https://doi.org/10.12974/2311-8695.2021.09.1","url":null,"abstract":"The aim of the study was to define the prevalence of impacted lower third molars using cone beam computed tomography and to classify according to Winter, Pell and Gregory and Maglione. The sample consisted of 250 CBCT exams. The evaluation of the selected images was performed using CS 3D imaging software using axial, cross-section and panoramic reconstruction sections. Data collection was performed by filling out the forms containing the classifications of Winter, Pell and Gregory and Maglione. Data analysis was performed through the distribution of frequencies (absolute and relative) associated with the construction of 95% confidence intervals of proportions. Of the 250 tomography exams analyzed, 113 (45.2%) were male and 137 (54.8%) were female. The positions and differences between the most frequent sides according to the Winter, Pell & Gregory and Maglione classification, respectively, were: Mesioangular - 29.8% (95% CI: 25.8% -33.8%), right side (30.4 %), left side (29.2%); Class II - 31.2% (95% CI: 27.1% -35.3%); position A, right side (30.4%) left side (32.0%); Class 1A - 39.8% (95% CI: 35.5% -44.1%), right side (40.0%), left side (39.6%). Thus, there was a higher prevalence in the mesioangular position according to the Winter classification and, in relation to the Pell and Gregory classification, the class II / A position; while, according to Maglione's classification, the most prevalent position is Class 1A. ","PeriodicalId":76664,"journal":{"name":"The Journal of the American College of Dentists","volume":"185 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72733145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-02DOI: 10.12974/2311-8695.2021.09.2
Téssia Richelly Nóbrega Borja de Melo, M. Youssef
objective: The aim of this work was to evaluate the shear strength of ceramic brackets as a function of two adhesive systems (kit TransbondTM XT; TransbondTM Plus Self Etching Primer/ 3M Unitek®) and two light sources (LED and Argon Laser). Method: 28 maxillary premolars were used, divided into two groups (n=14), according to the adhesive system and light source. The teeth were enclosed in ¾-inch PVC tubes, with special stone plaster, perpendicular to the ground and tubes. Brackets were fixed over the exposed crowns. The teeth were stored at 37ºC for 24 hours and then submitted to 1,000 thermal cycles with 30 seconds in each bath (5°C and 55°C). The shear test was performed on a Shimadzu® testing machine at a speed of 0.5mm/min. Enamel surfaces were qualified using the ARI (Adhesive Remaining Index). Data were submitted to statistical analyzes ANOVA, Tukey and Kruskal-Wallis (p<0.05). Results: the conventional TransbondTM XT kit adhesive system was superior to the self-etching system. LED and Argon Laser showed similar behaviors. Conclusion: Argon laser did not influence shear strength or ARI scores.
{"title":"Influence of Polymerization with Argon Laser and LED on Shear Resistance of Adhesive Systems","authors":"Téssia Richelly Nóbrega Borja de Melo, M. Youssef","doi":"10.12974/2311-8695.2021.09.2","DOIUrl":"https://doi.org/10.12974/2311-8695.2021.09.2","url":null,"abstract":"objective: The aim of this work was to evaluate the shear strength of ceramic brackets as a function of two adhesive systems (kit TransbondTM XT; TransbondTM Plus Self Etching Primer/ 3M Unitek®) and two light sources (LED and Argon Laser).\u0000Method: 28 maxillary premolars were used, divided into two groups (n=14), according to the adhesive system and light source. The teeth were enclosed in ¾-inch PVC tubes, with special stone plaster, perpendicular to the ground and tubes. Brackets were fixed over the exposed crowns. The teeth were stored at 37ºC for 24 hours and then submitted to 1,000 thermal cycles with 30 seconds in each bath (5°C and 55°C). The shear test was performed on a Shimadzu® testing machine at a speed of 0.5mm/min. Enamel surfaces were qualified using the ARI (Adhesive Remaining Index). Data were submitted to statistical analyzes ANOVA, Tukey and Kruskal-Wallis (p<0.05).\u0000Results: the conventional TransbondTM XT kit adhesive system was superior to the self-etching system. LED and Argon Laser showed similar behaviors.\u0000Conclusion: Argon laser did not influence shear strength or ARI scores. ","PeriodicalId":76664,"journal":{"name":"The Journal of the American College of Dentists","volume":"89 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89879090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-10-19DOI: 10.12974/2311-8695.2020.08.7
T. Melo, P. Costa, R. Medeiros, J. Araújo-Filho, A. Júnior
The COVID-19 disease pandemic, caused by the new Coronavirus (SARS-COV-2) that originated in Wuhan, China, is an international public health emergency. This disease represents a major challenge for all health professionals, including dentists and their staff. This moment has significantly changed the attendance and routine of dental offices, so there is a great need for information and the development of protocols for the guidance of professionals. This paper aims to systematize the recommendations for dentists’ clinical practice on biosafety and the use of Personal Protective Equipment (PPE), seeking to optimize dental care during the COVID-19 pandemic.
{"title":"Precautions and Recommendations for Dental Care During the COVID-19 Pandemic","authors":"T. Melo, P. Costa, R. Medeiros, J. Araújo-Filho, A. Júnior","doi":"10.12974/2311-8695.2020.08.7","DOIUrl":"https://doi.org/10.12974/2311-8695.2020.08.7","url":null,"abstract":"The COVID-19 disease pandemic, caused by the new Coronavirus (SARS-COV-2) that originated in Wuhan, China, is an international public health emergency. This disease represents a major challenge for all health professionals, including dentists and their staff. This moment has significantly changed the attendance and routine of dental offices, so there is a great need for information and the development of protocols for the guidance of professionals. This paper aims to systematize the recommendations for dentists’ clinical practice on biosafety and the use of Personal Protective Equipment (PPE), seeking to optimize dental care during the COVID-19 pandemic.","PeriodicalId":76664,"journal":{"name":"The Journal of the American College of Dentists","volume":"283 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75044749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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