Endodontology最新文献_第9页

Comparative evaluation of bending property and torsional resistance of three nickel–titanium files: A finite element analysis 三种镍钛锉抗弯性能和抗扭性能的比较评价——有限元分析

Endodontology Pub Date : 2022-07-01 DOI: 10.4103/endo.endo_227_21

Neha Mundhada, C. Makade, Pratima R Shenoi

{"title":"Comparative evaluation of bending property and torsional resistance of three nickel–titanium files: A finite element analysis","authors":"Neha Mundhada, C. Makade, Pratima R Shenoi","doi":"10.4103/endo.endo_227_21","DOIUrl":"https://doi.org/10.4103/endo.endo_227_21","url":null,"abstract":"Aims: We aimed to investigate the effect of instrument length on the torsional resistance and bending property of three nickel–titanium files, namely ProTaper Gold (PTG), ProTaper Next (PTN), and HyFlex CM (HCM) using finite element analysis. Materials and Methods: Three-dimensional models of each aforementioned system were created using the computer-assisted design (CAD) software SolidWorks® 2016 (Dassault Systèmes, SolidWorks Corp., Concord, MA, U. S.). Then, all models were imported to the ANSYS® Workbench 16 (Canonsburg, PA, U. S.) where the simulation was computed. The boundary conditions used to simulate the behavior of the endodontic instruments were in compliance with the ISO 3630 1 specification standards. Results: It was observed that in bending test, HCM model exhibited load of 510.35 MPa with displacement of 6.05 mm, followed by PTG model (465.48 MPa) and 11.21 mm displacement, then PTN file model (440.74 MPa) and 10.30 mm displacement, whereas in torsional test the rigidity curve for HCM file (1.9673 N mm/Radian) lies much below PTG (6.4615 N mm/Radian) which clearly shows that HCM is flexible as compared to PTG and PTN. Conclusion: Considering the high flexibility of the HCM file, it can be effectively used in severely curved root canals and PTG and PTN files in moderately curved root canals. It was also recommended that HCM files should not be kept in canals for a longer time because stresses might reach to ultimate level quickly which can cause fracture.","PeriodicalId":11607,"journal":{"name":"Endodontology","volume":"34 1","pages":"196 - 201"},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44378378","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

Quantitative evaluation of apically extruded debris during root canal preparation with reciprocating single file system, continuous rotary multiple file system and manual technique: An in vitro study 往复式单锉系统、连续旋转多锉系统和手动技术对根管预备过程中顶端挤出碎屑的定量评价：体外研究

Endodontology Pub Date : 2022-07-01 DOI: 10.4103/endo.endo_167_21

Pratima Mohana, D. Abraham, Alka Gurawa, Alpa Gupta, P. Chauhan, Arundeep Singh, Sucheta Jala

{"title":"Quantitative evaluation of apically extruded debris during root canal preparation with reciprocating single file system, continuous rotary multiple file system and manual technique: An in vitro study","authors":"Pratima Mohana, D. Abraham, Alka Gurawa, Alpa Gupta, P. Chauhan, Arundeep Singh, Sucheta Jala","doi":"10.4103/endo.endo_167_21","DOIUrl":"https://doi.org/10.4103/endo.endo_167_21","url":null,"abstract":"Aim: The aim of the study is to evaluate and compare the quantity of apical debris extrusion from the root canals during biomechanical preparation by various rotary (reciprocating, Protaper Next [PTN] continuous) and manual hand filing system and by means of Crown-Down and Step Back techniques. Materials and Methods: Eighty mature, human mandibular premolars with single canals were randomly divided into four groups of twenty teeth each. Each group was instrumented using one of the four instrumentation systems: Group A: WaveOne, Group B: PTN, Group C: Hand file with Crown Down, Group D: Hand file with Step Back. Extruded debris was collected in preweighed Eppendorf tubes and the extruded irrigant was evaporated. The weight of the dry extruded debris was established by comparing the pre and post-instrumentation weight of Eppendorf tubes for each group. Results: Mean comparison of groups in different instrumentation by ANOVA presented that hand file with Step-Back technique is showed maximum amount of apical extrusion debris and continuous rotary file system showed the minimum amount of extrusion debris (P < 0.001). Conclusions: The current ex vivo study demonstrated reciprocating single file WaveOne and continuous rotary multiple file system lead to significantly less debris extrusion than manual hand file techniques. Reciprocating single file WaveOne extruded more debris than continuous rotary PTN multiple file system. More amount of debris was extruded in the group with Step-Back hand filing than Crown-Down technique.","PeriodicalId":11607,"journal":{"name":"Endodontology","volume":"34 1","pages":"80 - 85"},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46605114","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

Endodontic management of perforating internal resorption in a mandibular molar using sandwich technique 夹心技术治疗下颌磨牙穿孔性内吸收

Endodontology Pub Date : 2022-07-01 DOI: 10.4103/endo.endo_104_22

V. Chopra, Harneet Chopra, Gurdeep Singh, Shahab Javanmardi, Nutayla Alharthy, A. Qutieshat, Ajinkya M. Pawar

引用次数: 0

Comparative evaluation of cyclic fatigue resistance of file systems based on different manufacturing technologies after exposure to NaOCl and multiple sterilization cycles 基于不同制造技术的文件系统在暴露于NaOCl和多次灭菌循环后的抗循环疲劳性的比较评估

Endodontology Pub Date : 2022-07-01 DOI: 10.4103/endo.endo_90_19

Pulkit Malhotra, P. Bansal, V. Nikhil, S. Jaiswal, Sachin Gupta

{"title":"Comparative evaluation of cyclic fatigue resistance of file systems based on different manufacturing technologies after exposure to NaOCl and multiple sterilization cycles","authors":"Pulkit Malhotra, P. Bansal, V. Nikhil, S. Jaiswal, Sachin Gupta","doi":"10.4103/endo.endo_90_19","DOIUrl":"https://doi.org/10.4103/endo.endo_90_19","url":null,"abstract":"Aim: To comparatively evaluate in vitro the cyclic fatigue resistance of different file systems based on different manufacturing technologies after exposure to NaOCl and multiple sterilization cycles. Materials and Methods: Sixty new Nickel − Titanium (NiTi) rotary files were selected and divided into five groups (n = 12) based on different manufacturing technology. These groups were: Protaper Universal (GPT) (DentsplyMaillefer, Ballaigues, Switzerland) Protaper Next (GPTN) (Dentsply, Tulsa, OK, USA), Twisted files (GTF) (Sybron Endo, Orange, CA, USA), Neoniti (GNL) (Neolix, France), and Hyflex CM (GHCM) (Coltene/whaledent inc., 235 Ascort Parkway, Cuyahoga falls, OH, USA). Files were sterilized in an autoclave at 121°C at 15 psi for 15 min and exposed to 5.0% NaOCl solution for 30 s before cyclic fatigue testing till instrument fracture using a standardized grooved block assembly with the artificial canal at 90° angle of curvature using a 16:1 reduction hand-piece powered by a torque-controlled motor. This whole procedure of autoclaving, immersion in sodium hypochlorite solution and rotating in a stainless steel assembly was repeated again and again until the file fractured. Results: The highest mean for the number of cycles before fracture was observed with Neoniti (GNL) and lowest for Hyflex CM (GHCM). The difference between GPT vs GTF, GPTvs GNL, GNLvs GHCM; GPTNvs GTF, GPTNvs GNL, GPTNvs GHCM; GTFvs GNL, GTFvs GHCM and GNL VS GHCM was statistically significant, whereas the difference between GPTvs GPTN was statistically nonsignificant. Conclusion: Neoniti and twisted file systems resisted the maximum number of cycles to fracture at 90° angle of curvature after exposure to 5% sodium hypochlorite solution and multiple autoclaving cycles. Hyflex CM showed the least resistance in the similar conditions.","PeriodicalId":11607,"journal":{"name":"Endodontology","volume":"34 1","pages":"151 - 155"},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47260828","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

Guided endodontics: Management of calcified tooth with a large periapical lesion using cone beam computed tomography and three-dimensional printed guide: A case report 引导根管治疗：应用锥形束计算机断层扫描和三维打印引导治疗钙化牙齿并伴有较大根尖周病变：一例报告

Endodontology Pub Date : 2022-07-01 DOI: 10.4103/endo.endo_84_21

A. Nazar, Liza George, J. Mathew

引用次数: 0

Management of an anomalous maxillary lateral incisor fused with a supernumerary tooth and a coronal dens invaginatus 上颌侧切牙畸形合并多生牙及冠状突内陷的处理

Endodontology Pub Date : 2022-07-01 DOI: 10.4103/endo.endo_197_21

L. Likhyani, M. Choudhary, S. Khandelwal, Y. Chacko

引用次数: 0

Antimicrobial efficacy of photosensitized nanoparticles, diode laser, conventional, and sonic irrigation systems against enterococcus faecalis in root canals – An in vitro study 光敏纳米颗粒、二极管激光、常规和声波灌洗系统对根管内粪肠球菌的抗菌效果-体外研究

Endodontology Pub Date : 2022-07-01 DOI: 10.4103/endo.endo_38_21

Ananya Sharma, R. Kochhar, M. Kumari

{"title":"Antimicrobial efficacy of photosensitized nanoparticles, diode laser, conventional, and sonic irrigation systems against enterococcus faecalis in root canals – An in vitro study","authors":"Ananya Sharma, R. Kochhar, M. Kumari","doi":"10.4103/endo.endo_38_21","DOIUrl":"https://doi.org/10.4103/endo.endo_38_21","url":null,"abstract":"Aim: This study aims to evaluate and compare the antimicrobial effect of Photosensitized Nanoparticles, Diode Laser (DL), and Conventional and Sonic Irrigation Systems against Enterococcus faecalis in root canals – An in vitro Study. Materials and Methods: The root canals of 104 extracted human single-rooted teeth were prepared, and E. faecalis was incubated in the root canals for 1 week. The teeth were randomly divided into four experimental groups and one control group (n = 20): No treatment was done, sodium hypochloride (NaOCl) group (n = 20): Canals irrigated with5 ml of 2.5% NaOCl for 60 s, NaOCl and Endoactivator group (n = 20): Canals irrigated with 5 ml of 2.5% NaOCl for 60 s followed by activation of NaOCl with Endoactivator for 30 s, NaOCl and 910 nm DL group (n = 20): (1 W 5 times for 5 s) canals irrigation with5 ml of 2.5% NaOCl for 60 s followed by Photodynamic Therapy (PDT) with 910 nm DL, silver nanoparticles (AgNPs)/Indocyanine green (ICG)/DL group (n = 20): DL modified PDT with 5 min of irrigation with 5 mL AgNPs (100 ppm)/ICG/910 nm DL (200 mW, 30 s). A reduction in colony count was assessed by counting colony-forming units by Digital Colony Counter. Results: Significant reductions were noted in E. faecalis colony counts in all groups (P < 0.05). The greatest reduction in colony count (99.93%) was noted in the NaOCl and DL group followed by NaOCl and Endoactivator group; however, the differences in this respect between the AN/ICG/DL group and NaOCl group were not significant (P > 0.05). Conclusions: NaOCl and 910 nm DL were more successful in reducing the number of E. faecalis colony counts followed by NaOCl and Endoactivator group but it can also be concluded that PDT with ICG, an 910 nm DL, and AgNPs has the potential to be used as an adjunct for disinfection of the root canal system.","PeriodicalId":11607,"journal":{"name":"Endodontology","volume":"34 1","pages":"108 - 114"},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45869923","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

Revisiting the future of root canal obturation 根管充填术的发展前景

Endodontology Pub Date : 2022-07-01 DOI: 10.4103/endo.endo_142_22

J. Gutmann, Vivian Manjarrés, Catalina De La Espriella

引用次数: 1

Correlation of endodontic infection and cytokine expression in patients with systemic diseases: A systematic review of clinical studies 全身性疾病患者牙髓感染与细胞因子表达的相关性:临床研究的系统综述

Endodontology Pub Date : 2022-07-01 DOI: 10.4103/endo.endo_13_22

D. Abraham, Arundeep Singh, A. Kurian, Alpa Gupta, Kritika Aneja, Simar Sethi

{"title":"Correlation of endodontic infection and cytokine expression in patients with systemic diseases: A systematic review of clinical studies","authors":"D. Abraham, Arundeep Singh, A. Kurian, Alpa Gupta, Kritika Aneja, Simar Sethi","doi":"10.4103/endo.endo_13_22","DOIUrl":"https://doi.org/10.4103/endo.endo_13_22","url":null,"abstract":"Aim: The role of various host response mediators in pulpitis has been extensively documented as these components may operate as biomarkers that reflect the condition of pulp tissues. The expression of these biomarkers is further affected in the presence of different systemic diseases. This review aims to assess if a correlation exists in the expression of cytokines and endodontic infection in patients having various systemic diseases undergoing nonsurgical endodontic therapy. Materials and Methods: The review includes a complete manual search as well as electronic databases such as PubMed, Scopus, and EBSCOhost. The Preferred Reporting Items for Systematic Reviews and Meta-Analyses checklist was used to frame the review process. The critical appraisal checklist for quasi experimental studies developed by Joanna Briggs Institute was used to examine the risk of bias. For prospective clinical studies, eight criteria were used to assess the risk of bias. The studies included were clinical trials that estimated mRNA expression of cytokines from periapical interstitial fluid before and following disinfection of the root canals in patients suffering from various systemic diseases. Results: This review included a total of four papers from the initial 122 publications. When compared to normal controls, endodontic infection was associated with altered expression of these cytokines in patients presenting various systemic diseases. Conclusions: This information can subsequently be utilized to correctly distinguish between diseased and healthy pulp tissues. The interaction of cytokines in systemic diseases and their possible use in endodontics as a more precise and biologically based diagnostic tool can be planned.","PeriodicalId":11607,"journal":{"name":"Endodontology","volume":"34 1","pages":"143 - 150"},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48756445","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

Comparative evaluation of effectiveness of manual and various rotary retreatment techniques for removal of root canal filling material: An in-vitro study 手动和各种旋转再处理技术去除根管充填材料效果的比较评价：一项体外研究

Endodontology Pub Date : 2022-07-01 DOI: 10.4103/endo.endo_78_22

A. Jagtap, G. Aher, M. Gulve, Swapnil Kolhe

{"title":"Comparative evaluation of effectiveness of manual and various rotary retreatment techniques for removal of root canal filling material: An in-vitro study","authors":"A. Jagtap, G. Aher, M. Gulve, Swapnil Kolhe","doi":"10.4103/endo.endo_78_22","DOIUrl":"https://doi.org/10.4103/endo.endo_78_22","url":null,"abstract":"Aim: This study intended to compare the effectiveness of manual files H-files and ProTaper universal retreatment (PTUR), R-Endo retreatment, and gutta-percha removal (GPR) Mani retreatment rotary files for removing root canal filling material. Materials and Methods: Eighty mandibular premolars with single canal were selected. The canals were enlarged with ProTaper rotary files up to F2 and obturated using the lateral condensation technique. Then, the samples were randomly divided into four groups and retreated using hand files and rotary retreatment files. The area of remaining root canal filling material was evaluated by splitting the tooth using a stereomicroscope with ×10 and auto computer-aided design software and the percentage of remaining filling material on canal walls was calculated with equation: area % of remaining filling material = area of remaining material ×100/area of canal. One-way ANOVA was carried out to compare the groups and post hoc Tukey's test for pairwise association with each of four groups. Results: Group A (H-files) showed 61.87% of remaining filling material, Group B (PTUR) showed 24.94%, Group C (R-Endo) showed 37.12%, and Group D (GPR Mani) showed 45.95% of remaining root canal filling material. Conclusions: All the groups showed residual root canal filling material. Least was seen in group retreated using PTUR files and maximum was seen in group retreated with H-files.","PeriodicalId":11607,"journal":{"name":"Endodontology","volume":"34 1","pages":"184 - 188"},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47038415","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