Endodontology最新文献_第8页

Evaluation of irrigant flow in the root canal isthmus region using a computational fluid dynamics model 使用计算流体动力学模型评估根管峡部区域的冲洗剂流量

Endodontology Pub Date : 2022-10-01 DOI: 10.4103/endo.endo_47_22

A. Thomas, Dhanasekaran Sihivahanan, Ranjithkumar Sivarajan

{"title":"Evaluation of irrigant flow in the root canal isthmus region using a computational fluid dynamics model","authors":"A. Thomas, Dhanasekaran Sihivahanan, Ranjithkumar Sivarajan","doi":"10.4103/endo.endo_47_22","DOIUrl":"https://doi.org/10.4103/endo.endo_47_22","url":null,"abstract":"Aim: The aim of this study was to evaluate the irrigation dynamics of irrigant delivery systems and irrigating solutions in the root canal isthmus region of a mandibular premolar using computational fluid dynamics (CFD). Methods: A CFD model of the mandibular premolar with the root canal isthmus was created using scanned microcomputed tomography images. Using this CFD model, the irrigant flow in the root canal isthmus region was visualized. The irrigation dynamics of three irrigant delivery systems – Group 1: syringe irrigation (open-ended), Group 2: EndoVac irrigation system, and Group 3: modified EndoVac system were studied and compared to assess the efficiency. Following which, the wall shear stress, streamline of irrigant in the isthmus region, and irrigant velocity were evaluated. Results: Group 1 (open-ended needle) presented with the highest wall shear stress as compared to other groups, restricted to the apical third. All groups exhibited maximum velocity at the region of irrigant exit followed by a gradual decline in the isthmus and coronal region. It was observed that only Group III (Modified EndoVac) displayed a flow of irrigant in the isthmus region. Conclusions: The modified EndoVac system was efficient in delivering the irrigating solutions to the isthmus region.","PeriodicalId":11607,"journal":{"name":"Endodontology","volume":"34 1","pages":"242 - 247"},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48811041","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 multidisciplinary approach toward the replacement of missing maxillary anterior teeth using impacted mesiodens as abutment via “reverse endodontic treatment” 一种多学科的方法，通过“反向根管治疗”用阻生近中牙作为基牙替换缺失的上颌前牙

Endodontology Pub Date : 2022-10-01 DOI: 10.4103/endo.endo_109_21

S. Mittal, V. Aggarwal, Sudhir Munjal, T. Kumar, Vanita Keshav, Anmolpreet Kaur, Arshpreet Kaur

引用次数: 0

Antibacterial efficacy of sodium hypochlorite versus apple cider vinegar against Enterococcus faecalis in contracted endodontic cavity: An in vitro study 次氯酸钠与苹果醋对牙髓收缩腔内粪肠球菌抑菌效果的体外研究

Endodontology Pub Date : 2022-10-01 DOI: 10.4103/endo.endo_93_22

K. Supreet, K. Kishan, N. Shah

{"title":"Antibacterial efficacy of sodium hypochlorite versus apple cider vinegar against Enterococcus faecalis in contracted endodontic cavity: An in vitro study","authors":"K. Supreet, K. Kishan, N. Shah","doi":"10.4103/endo.endo_93_22","DOIUrl":"https://doi.org/10.4103/endo.endo_93_22","url":null,"abstract":"Aim: The aim of this study is to evaluate and compare the antibacterial efficacy of 3% sodium hypochlorite with 5% apple cider vinegar using passive ultrasonic irrigation (PUI) against Enterococcus faecalis in contracted endodontic access cavity on mandibular molars. Methods: Contracted access cavity was prepared in 30 extracted human permanent mandibular molar teeth. The root canals were incubated with strain of E. faecalis MTCC 9845 (Strain designation – HBL/BAC– 002/08–09) using 15 K-type manual file for 3 weeks. At this point, the S1 sample was collected using 15 paper points. The extracted teeth were randomly divided into two groups: sodium hypochlorite group and apple cider vinegar group. After mechanical instrumentation up to 25/04 rotary files HyFlex CM (Coltene Whaledent, Altstätten, Switzerland) and use of respective irrigants (3% sodium hypochlorite and 5% apple cider vinegar) using PUI, S2 sample was collected using 25 size paper point. The cultivated samples were incubated at 37°C for 24 h, and the number of bacterial colonies was counted as colony-forming units (CFUs)/mL. Data obtained from S1 and S2 were tabulated and subjected to Wilcoxon signed-ranks test and Mann–Whitney test. Results: There was a significant reduction in microbial count in both groups (P < 0.05) when preoperative CFUs were compared with postoperative. There was slightly higher reduction in the apple cider vinegar group in S2 sample, as compared to the sodium hypochlorite group, but it was not statistically significant (P > 0.05). Conclusion: Antimicrobial activity of 5% apple cider vinegar is similar to 3% sodium hypochlorite.","PeriodicalId":11607,"journal":{"name":"Endodontology","volume":"34 1","pages":"254 - 258"},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45878127","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

Authorship ethics - An enigma! 作家伦理-一个谜！

Endodontology Pub Date : 2022-10-01 DOI: 10.4103/endo.endo_264_22

Nandini Suresh

引用次数: 0

Four distal root canals in a two-rooted permanent mandibular first molar: Report of a rare case, its incidence, and literature review 四根远端根管治疗双根永久下颌第一磨牙:报告一例罕见病例、发病率及文献复习

Endodontology Pub Date : 2022-07-01 DOI: 10.4103/endo.endo_191_21

Urvashi Ujariya, Foram Patel, Rajendra Bharatiya, A. Kothari

{"title":"Four distal root canals in a two-rooted permanent mandibular first molar: Report of a rare case, its incidence, and literature review","authors":"Urvashi Ujariya, Foram Patel, Rajendra Bharatiya, A. Kothari","doi":"10.4103/endo.endo_191_21","DOIUrl":"https://doi.org/10.4103/endo.endo_191_21","url":null,"abstract":"Understanding root canal anatomy and its variations is an essential part of the success of endodontic treatment. This case report represents an extremely rare occurrence of four distal root canals in a two-rooted mandibular first molar (MFM). Nonsurgical endodontic treatment of MFM was performed with the aid of the dental operating microscope and ultrasonic troughing tips. PubMed database (www.ncbi.nim.nih.gov/pubmed) was searched for relevant articles using specific search terminologies for conducting the literature review. Data extraction was performed in relation with the inclusion and exclusion criteria provided in the study. Quantitative data synthesis was performed. Only four cases (including the present case) of four distal root canals in two-rooted MFMs have been reported in dental literature. Among these, three cases were reported in the Indian population. The overall incidence of four canals in a distal root of two-rooted MFMs is 0.09% according to clinical/laboratory studies. The most common distal root canal configurations of two-rooted MFMs found in clinical/laboratory studies were Vertucci type I (68.15%) followed by type II (37.6%) and type III (35.08%). A meticulous understanding of the anatomical variations, preoperative awareness, and intraoperative care to identify the landmarks of usual as well as any unusual anatomy of the root canal system will help to increase the rate of clinical success.","PeriodicalId":11607,"journal":{"name":"Endodontology","volume":"34 1","pages":"212 - 220"},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42795216","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 therapy: Stop ringing the alarm; it is time to get out of the building! 牙髓治疗：停止拉响警报；是时候离开大楼了！

Endodontology Pub Date : 2022-07-01 DOI: 10.4103/endo.endo_159_22

A. Kishen

引用次数: 0

Antimicrobial efficacy of commercially available ozonated olive oil and sodium hypochlorite with and without ultrasonic activation in primary endodontic infections: A randomized clinical trial 市售臭氧化橄榄油和次氯酸钠在超声激活和不超声激活的情况下对原发性牙髓病感染的抗菌效果：一项随机临床试验

Endodontology Pub Date : 2022-07-01 DOI: 10.4103/endo.endo_57_21

R. Mittal, Monika Tandan, G. Kaushik

{"title":"Antimicrobial efficacy of commercially available ozonated olive oil and sodium hypochlorite with and without ultrasonic activation in primary endodontic infections: A randomized clinical trial","authors":"R. Mittal, Monika Tandan, G. Kaushik","doi":"10.4103/endo.endo_57_21","DOIUrl":"https://doi.org/10.4103/endo.endo_57_21","url":null,"abstract":"Aim: This study compared the antimicrobial efficacy of commercially available ozonated olive oil and sodium hypochlorite (NaOCl) with and without ultrasonic activation in primary endodontic infections. Materials and Methods: Fifty-six patients fulfilling the inclusion criteria were selected and randomly assigned to four groups (n = 14) according to the irrigant and irrigation technique employed during biomechanical preparation. Group 1: NaOCl, Group 2: NaOCl with passive ultrasonic irrigation (PUI), Group 3-Ozonated olive oil, and Group 4-Ozonated olive oil with PUI. Bacteriological samples were taken from the canals before (S1) and after (S2) preparation using sterile paper points. Microbiological samples (S1, S2) were incubated and plated on Brain Heart Infusion agar. Colonies were counted after 24 h using the classic bacterial counting method. Collected data were statistically analyzed. Results: Statistically significant reduction (P < 0.05) of bacterial counts was found from S1 to S2 in all four experimental groups. The mean percentage reduction of bacterial counts of Group 1 and Group 3 was found to be lower than that of Group 2 and Group 4. The highest mean percentage bacterial reduction was seen in Group 2 (P < 0.05). Conclusion: PUI significantly enhanced the antimicrobial activity of the experimental groups and ozonated olive oil can be used as an adjunctive irrigant in primary endodontic infections. The antibacterial activity of ozonated olive oil with PUI was found to be comparable with that of NaOCl with PUI.","PeriodicalId":11607,"journal":{"name":"Endodontology","volume":"34 1","pages":"102 - 107"},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49420089","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: 2

Comparative evaluation of cerium oxide nanoparticles and calcium hydroxide as intracanal medicament against Enterococcus faecalis on tooth substrate: An in vitro study 纳米氧化铈和氢氧化钙作为肛门内药物对抗牙齿基质上粪肠球菌的比较评价：体外研究

Endodontology Pub Date : 2022-07-01 DOI: 10.4103/endo.endo_25_22

Dona Sanju, V. Kumari, Toby Thomas, J. Thomas, R. Sujeer

{"title":"Comparative evaluation of cerium oxide nanoparticles and calcium hydroxide as intracanal medicament against Enterococcus faecalis on tooth substrate: An in vitro study","authors":"Dona Sanju, V. Kumari, Toby Thomas, J. Thomas, R. Sujeer","doi":"10.4103/endo.endo_25_22","DOIUrl":"https://doi.org/10.4103/endo.endo_25_22","url":null,"abstract":"Aim: The aim of this study is to compare the antibacterial efficacy of cerium oxide nanoparticles and calcium hydroxide as intracanal medicaments against Enterococcus faecalis on tooth substrate – an in vitro study. Materials and Methods: The experiment was conducted in three stages. In Stage 1, antibacterial susceptibility test of three test materials, cerium oxide nanoparticles, calcium hydroxide, and vancomycin against E. faecalis was done using disc diffusion method. In Stage 2, determination of minimal inhibitory concentration and minimum bactericidal concentration of the cerium oxide nanoparticles was done by tube dilution method. In Stage 3, determination of CFU was carried out using dentinal blocks at 1-day and 5-day intervals at two different dentinal depths (200 μm and 400 μm) for calcium hydroxide (Group 1), cerium oxide nanoparticle dispersion (Group 2), a mixture of calcium hydroxide and cerium oxide nanoparticles (Group 3), and sterile water (Group 4). Results: The reduction of E. faecalis achieved by cerium oxide nanoparticles dispersion on day 5 was 66.9% as against 46.7% as shown by mixture of the two medicaments and 34.8% by calcium hydroxide paste alone on day 5 at 400-μm depth. Conclusion: Cerium oxide nanoparticles show a significantly higher antibacterial efficacy when compared to calcium hydroxide and its combination.","PeriodicalId":11607,"journal":{"name":"Endodontology","volume":"34 1","pages":"162 - 167"},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41969073","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 research: Asking the right questions in the right way 牙髓研究:以正确的方式提出正确的问题

Endodontology Pub Date : 2022-07-01 DOI: 10.4103/endo.endo_216_22

Nandini Suresh

引用次数: 0

Cytotoxicity of two different intercanal medicaments on human gingival fibroblasts - A Laboratory study 两种不同肛门间药物对人牙龈成纤维细胞的细胞毒性实验研究

Endodontology Pub Date : 2022-07-01 DOI: 10.4103/endo.endo_107_20

Behnaz Barakatein, A. Farhad, E. Shadmehr, H. Sharifi, Masoud Mohamad Sharif, A. Davoudi

{"title":"Cytotoxicity of two different intercanal medicaments on human gingival fibroblasts - A Laboratory study","authors":"Behnaz Barakatein, A. Farhad, E. Shadmehr, H. Sharifi, Masoud Mohamad Sharif, A. Davoudi","doi":"10.4103/endo.endo_107_20","DOIUrl":"https://doi.org/10.4103/endo.endo_107_20","url":null,"abstract":"Aim: Intracanal medicaments are often recommended during endodontic sessions to eliminate the necrotic debris and microorganisms. The aim of the present study was to observe the cytotoxicity of calcium hydroxide (CH) and colchicine (COL), at different concentrations, on human gingival fibroblast cells. Materials and Methods: Human gingival fibroblasts were cultured on plastic flasks containing RPMI 1640 media and fetal calf serum 10% supplemented with antibiotic agents. Trypsin/ethylenediaminetetraacetic acid 0.2% enzyme was used to isolate the cells, and the suspension was transferred to tubes for centrifuging. Conventional CH and COL were separately mixed with sterile saline solution to prepare a stock media. By serial dilution of stock media, desired concentrations were prepared at 2, 1.75, 1.5, and 1.25 mg/ml, separately. After considering a control group, the cells were exposed to test materials. 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay was conducted at 24 h, 72 h, and 7 days later. Optical density (OD) was evaluated to attain cell viability percentage. Finally, the recorded data were analyzed by Kruskal–Wallis and Mann–Whitney tests using SPSS software version 19 at a significant level of 0.05. Results: The highest (1.40 ± 0.66) and lowest (0.15 ± 0.00) ODs were observed in CH 1.25 mg/ml and COL 1.5 mg/ml after 72 h, respectively. All of the concentrations of both CH and COL showed significant OD differences with the control group (all P = 0.001). Conclusion: Both CH and COL manifested similar cytotoxicity on human gingival fibroblast cells.","PeriodicalId":11607,"journal":{"name":"Endodontology","volume":"34 1","pages":"76 - 79"},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44281981","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