Journal of Restorative Dentistry最新文献_第3页

Correlation of fracture resistance of molar teeth with weight 磨牙抗折能力与重量的相关性研究

Journal of Restorative Dentistry Pub Date : 2015-09-01 DOI: 10.4103/2321-4619.168734

B. Yaşa, H. Ertas, H. Arslan, T. Gok, İ. Çapar

{"title":"Correlation of fracture resistance of molar teeth with weight","authors":"B. Yaşa, H. Ertas, H. Arslan, T. Gok, İ. Çapar","doi":"10.4103/2321-4619.168734","DOIUrl":"https://doi.org/10.4103/2321-4619.168734","url":null,"abstract":"Background: The aim of this study was to determine a standardizing model for fracture resistance test methods in which molar teeth are used. Materials and Methods: Fifty freshly extracted human mandibular molar teeth were selected. Each tooth was numbered and data were obtained by measuring the mesiodistal (MD) and buccolingual (BL) dimensions, length, and weight. Tests for fracture strength were performed using a universal testing machine, and for each sample, the force at the time of fracture was recorded in Newton. The correlations of the MD and BL dimensions, lengths, and weights of the teeth to the fracture strength values were evaluated using the Pearson correlation coefficient. Results: Significant correlations were not observed between the fracture strength values and MD dimensions (r = 0.055, P > 0.05), BL dimensions (r = 0.074, P > 0.05), and lengths of the teeth (r = 0.017, P > 0.05); however, they were observed with the weights of the teeth (r = 0.312, P < 0.05). Conclusions: The fracture resistance of molar teeth increases as their weights increases. These weights should be standardized during fracture resistance studies when distributing sample molar teeth into the study groups.","PeriodicalId":17076,"journal":{"name":"Journal of Restorative Dentistry","volume":"1 1","pages":"76 - 79"},"PeriodicalIF":0.0,"publicationDate":"2015-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73186194","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}

引用次数: 1

Comparative evaluation of working length determination by using conventional radiography, digital radiography and electronic apex locator 传统x线照相、数字x线照相和电子顶点定位仪测定工作长度的比较评价

Journal of Restorative Dentistry Pub Date : 2015-09-01 DOI: 10.4103/2321-4619.168736

R. Mittal, Meenu Singla, A. Sood, Anchal Singla

{"title":"Comparative evaluation of working length determination by using conventional radiography, digital radiography and electronic apex locator","authors":"R. Mittal, Meenu Singla, A. Sood, Anchal Singla","doi":"10.4103/2321-4619.168736","DOIUrl":"https://doi.org/10.4103/2321-4619.168736","url":null,"abstract":"Objective: The aim of this study was to compare the diagnostic efficacy of an electronic apex locator (EAL), conventional radiography, and digital radiography in working length (WL) determination. Materials and Methods: This study was performed on 25 vital premolar teeth, scheduled for extraction in orthodontic patients. After administration of local anesthesia, the teeth were isolated and the pulp cavities were accessed. The WL for each tooth was measured by an EAL (Justy II; Yoshida Dentcraft, Tokyo, Japan), conventional and digital radiographies. Immediately after WL determination, the teeth were extracted and actual WL was measured with a file under magnifying loupes (X3). Ability to measure WL was detected precisely and in acceptable range that is ± 0.5 mm of actual WL. Results: The mean value of differences between three experimental methods length and the actual WL were statistically significant (P < 0.05). EAL gave the most accurate readings out of all the experimental groups, with 100% accuracy within the acceptable range where as digital radiography gave the least accurate reading. Conclusion: The electronic method (Justy II apex locator) demonstrated significant accuracy in determining the working length.","PeriodicalId":17076,"journal":{"name":"Journal of Restorative Dentistry","volume":"19 1","pages":"70 - 75"},"PeriodicalIF":0.0,"publicationDate":"2015-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84187763","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}

引用次数: 6

Nonsurgical retreatment and reinforcement of an immature permanent tooth with periapical lesion of endodontic origin 根管源性根尖周病变的未成熟恒牙的非手术再治疗和加固

Journal of Restorative Dentistry Pub Date : 2015-09-01 DOI: 10.4103/2321-4619.168737

A. Malhotra, J. Ahlawat, C. Bansal, H. Rao

引用次数: 1

A case report on fluorosed teeth whitening without microabrasion - Is it possible? 氟化牙齿无微磨美白1例报告-可能吗?

Journal of Restorative Dentistry Pub Date : 2015-09-01 DOI: 10.4103/2321-4619.168730

R. Ermis, M. Ugurlu

{"title":"A case report on fluorosed teeth whitening without microabrasion - Is it possible?","authors":"R. Ermis, M. Ugurlu","doi":"10.4103/2321-4619.168730","DOIUrl":"https://doi.org/10.4103/2321-4619.168730","url":null,"abstract":"Whitening of fluorosis stains ranging from yellow to dark brown presents a great challenge to the dentists. The aim of this study was to report the clinical case of a 32-year-old female patient with moderate fluorosis, who was treated using the combination of light-assisted in-office and at-home whitening system. The in-office whitening was performed using 25% hydrogen peroxide (Zoom DayWhite, Discus Dental, Stamford, USA) for four 15-min sessions with supplemental light (Philips Zoom, Stamford, USA) immediately followed by home whitening with a take-home custom tray using 22% carbamide peroxide (Zoom NiteWhite, Discus Dental, Stamford, USA) worn for 6 h a day for 1 week. Color measurements using a dental spectrophotometer (Spectroshade, MHT Optic Research AG, Niederhasli, Switzerland) after the first week showed that the suggested combination technique provided a fast whitening result with a high degree of patient satisfaction. The in-office whitening with light exhibited to be an efficient method for removing yellow and brown fluorosis stains, while the at-home whitening was useful for obtaining a uniform tooth shade. At the 6-month and 1-year recall, the teeth shade and appearance were evaluated. The results of this case report clearly show an effective esthetic result in the long term; however, the question of whether appropriate color stability would be provided by the technique still remains to be answered.","PeriodicalId":17076,"journal":{"name":"Journal of Restorative Dentistry","volume":"52 1","pages":"83 - 87"},"PeriodicalIF":0.0,"publicationDate":"2015-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85479551","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}

引用次数: 6

Influence of abutment-configuration on fracture strength of CAD/CAM-fabricated ceramic crowns 基台形态对CAD/ cam陶瓷冠断裂强度的影响

Journal of Restorative Dentistry Pub Date : 2015-09-01 DOI: 10.4103/2321-4619.168735

M. Weyhrauch, Stefan Wentaschack, C. Igiel, H. Scheller, K. Lehmann

{"title":"Influence of abutment-configuration on fracture strength of CAD/CAM-fabricated ceramic crowns","authors":"M. Weyhrauch, Stefan Wentaschack, C. Igiel, H. Scheller, K. Lehmann","doi":"10.4103/2321-4619.168735","DOIUrl":"https://doi.org/10.4103/2321-4619.168735","url":null,"abstract":"Aims: This in vitro study assessed the fracture strength of computer-aided designing (CAD)/computer-aided manufacturing (CAM)-fabricated crowns on implant-abutments with different configurations. Subjects and Methods: Out of 30, 15 implant-abutments were shortened to 2 mm and a ball-headin metal-alloy was fixed on each abutment. Single crowns (Vita Mark II, Empress CAD, e. max CAD, Lava Ultimate, artBloc Temp Merz Dental, Telio CAD, and Vita CAD Temp) were designed. After cementation of the crowns using RelyX Unicem, a Zwick universal testing machine was used to aplicate occlusal force until the ceramic material was destroyed. Statistical Analysis Used: Statistical analysis were performed using analysis of variance (α =0.05) and Bonferroni correction. Results: This study has confirmed significant increases in fracture strength of crowns made of ceramic materials using the ball-head abutmentc on figuration. Conclusion: Within the limitations of this in vitro study, the following conclusions can be drawn: (1) The fracture strength of CAD/CAM-fabricated all-ceramic crowns could be increased using a rounded abutment up to 1.6 times. (2) The fracture strength of CAD/CAM-fabricated polymers could not be enhanced using a ball-head abutment. The increase of the fracture strength of all-ceramic crowns using the rounded abutment, could give reasons for the producers of implant abutments to improve their abutment design.","PeriodicalId":17076,"journal":{"name":"Journal of Restorative Dentistry","volume":"13 1","pages":"80 - 82"},"PeriodicalIF":0.0,"publicationDate":"2015-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89519116","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}

引用次数: 0

A brief review of the methods used to determine the curvature of root canals 简要回顾用于确定根管曲率的方法

Journal of Restorative Dentistry Pub Date : 2015-09-01 DOI: 10.4103/2321-4619.168733

P. Balani, F. Niazi, H. Rashid

引用次数: 40

Spectrophotometric analysis of Icon® treatment outcome in two celiac siblings with developmental defects of enamel, a case report Icon®治疗2例伴有釉质发育缺陷的乳糜泻兄弟姐妹疗效的分光光度分析

Journal of Restorative Dentistry Pub Date : 2015-09-01 DOI: 10.4103/2321-4619.168729

F. Guerra, M. Mazur, F. Rinaldo, L. Ottolenghi

引用次数: 2

Synergic antibacterial effect between Maillard reactive product (MRP) and hydrogen peroxide (H2O2) on Streptococcus mutans 美拉德反应产物(MRP)与过氧化氢(H2O2)对变形链球菌的协同抑菌作用

Journal of Restorative Dentistry Pub Date : 2015-09-01 DOI: 10.4103/2321-4619.168731

M. Mizuno, Kiichiro Inoue

{"title":"Synergic antibacterial effect between Maillard reactive product (MRP) and hydrogen peroxide (H2O2) on Streptococcus mutans","authors":"M. Mizuno, Kiichiro Inoue","doi":"10.4103/2321-4619.168731","DOIUrl":"https://doi.org/10.4103/2321-4619.168731","url":null,"abstract":"Objectives: To evaluate the antibacterial activity of resin composite containing Maillard reactive product (MRP) and hydrogen peroxide (H2O2) on Streptococcus mutans (S. mutans), and to investigate the antibacterial mechanism involved. Methods: The growth of S. mutans was investigated after dental resin containing H2O2in the presence and absence of MRP, was immersed into bacterial solution. The effect of MRP on H2O2degradation was examined by the measurement of H2O2content. Results: The resin composite containing MRP and H2O2showed stable antibacterial activity compared with resin containing H2O2only, and the effect of MRP was speculated to be the suppression of H2O2degradation, and the presence of H2O2correlated with the antibacterial activity of resin composite. These results indicated that the antibacterial activity of resin composite containing MRP and H2O2on S. mutans was dependent on the presence of H2O2, and MRP suppressed the degradation of H2O2after combination with H2O2. EDTA also suppressed the degradation of H2O2. Conclusions: An antibacterial effect of resin composite containing MRP and H2O2on S. mutans was observed. The effect of MRP on H2O2might be a metal chelating action. Application of resin composite containing MRP and H2O2to a caries dentine could be an alternative therapy to or serve as an additional minimally invasive antibacterial treatment.","PeriodicalId":17076,"journal":{"name":"Journal of Restorative Dentistry","volume":"373 1","pages":"64 - 69"},"PeriodicalIF":0.0,"publicationDate":"2015-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76445124","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}

引用次数: 0

Tooth surface loss revisited: Classification, etiology, and management 牙面缺损:分类、病因及处理

Journal of Restorative Dentistry Pub Date : 2015-05-01 DOI: 10.4103/2321-4619.156643

A. Hanif, H. Rashid, Mustafa Nasim

引用次数: 25

Reminder about long-term clinical trials as a gold standard for the bonding effectiveness of adhesive resins 提醒大家，长期临床试验是胶粘剂树脂粘接效果的金标准

Journal of Restorative Dentistry Pub Date : 2015-05-01 DOI: 10.4103/2321-4619.156648

M. Ayar

引用次数: 2