scholarly journals Dentinal Microcrack Formation During Root Canal Treatment with Mtwo Instruments and MicroSeal Filling Technique

2018 ◽  
Vol 9 (1-2) ◽  
pp. 31-37
Author(s):  
Teocrito Carlesi ◽  
Giuseppe Nigro ◽  
Luigi Di Giacomo ◽  
Gianluca Plotino ◽  
Vito Antonio Malagnino
Keyword(s):  
Root Canal ◽  
Root Canal Treatment ◽  
Control Group ◽  
Chi Square ◽  
Root Canal Filling ◽  
Root Canals ◽  
Rotary Instruments ◽  
Chi Square Test ◽  
Microcrack Formation ◽  
Group 2

Objective: The purpose of this study was to evaluate dentinal microcrack formation during root canal treatment using Mtwo NiTi rotary instruments and MicroSeal filling technique. Materials and Methods: Forty-five single-rooted teeth were selected for the present study and divided into 3 different groups ( n = 15): Group 1, in which root canals were instrumented with Mtwo rotary files; Group 2, in which root canals were instrumented with Mtwo rotary files and filled using the MicroSeal technique; and Group 3, that acts as a control group in which no instrumentation nor obturation were performed. Then, roots were sectioned 3 mm, 6 mm, and 9 mm from the apex and the cut surface has been observed under a stereomicroscope to check for the presence or absence of dentinal microcracks. Number of dentinal microcracks was registered for each group at different levels and data were statistically analyzed using the Chi-square test with a level of significance set at P < .05. Results: No statistically significant differences were registered among groups ( P < .05). No microcracks were detected in Groups 1 and 3, while two dentinal microcracks were registered in Group 2. Conclusions: Mtwo rotary instruments and the MicroSeal root canal filling technique did not significantly induce dentinal microcrack formation.

scholarly journals A comparative study of root canal shaping using protaper universal and protaper next rotary files in preclinical dental education

PeerJ ◽  
2019 ◽  
Vol 7 ◽  
pp. e7419 ◽  
Author(s):  
Gül Çelik ◽  
Feyza Özdemir Kısacık ◽  
Emir Faruk Yılmaz ◽  
Arife Mersinlioğlu ◽  
İhsan Furkan Ertuğrul ◽  
...  
Keyword(s):  
Root Canal ◽  
Dental Students ◽  
Chi Square ◽  
Significance Level ◽  
Root Canals ◽  
Rotary Instruments ◽  
Working Length ◽  
Chi Square Test ◽  
The Mean ◽  
Canal Shaping

BackgroundDentistry has undergone an evolution in endodontics practice caused by the advancement of rotary techniques for root canal preparation and their subsequent incorporation into the teaching of dentistry undergraduates. This research aimed to evaluate the shaping ability of third-year dental students as their first experience in rotary instrumentation using ProTaper Universal (PTU) and ProTaper Next (PTN) (Dentsply Maillefer) rotary instruments in simulated curved canals.MethodsForty students instrumented 200 simulated canals with a 40° curvature in resin blocks according to the manufacturer’s instructions with PTU and 39 students and 195 canals with PTN files. The canals were prepared at a speed of 300 rpm using a 16:1 reduction hand-piece powered by an electric motor (Xsmart; Dentsply Maillefer). The final apical preparation was set to F2 for the PTU and X2 for the PTN group. The change in canal curvature was evaluated based on Schneider technique using the AutoCAD 2007 software on post-digital photographs. The incidence of instrument fracture and deformation, the incidence of ledge, the change in working length (WL), and the working time were noted. The data were analyzed with Student’st-test and Chi-Square test at a significance level of 0.05 using SPSS.ResultsPTN maintained the original canal curvature better, resulting in fewer fractures and ledges, and shaped the canals faster than the PTU (P < 0.05). The mean curves of the resin canals after the instrumentation for the PTU and PTN groups were 24.03° ± 3.14° and 25.64° ± 2.72°, respectively. Thirty-three (17.4%) PTU and 18 (9.3%) PTN files fractured (p < 0.05). Nine (4.5%) PTU and 2 (2.6%) PTN deformed (p > 0.05). The change in WL after instrumentation was 0.97 mm ± 0.95 mm in PTU and 0.96 mm ± 0.80 mm in PTN (p < 0.05). The mean times were 627 s ± 18 s for PTU and 379 s ± 18 s for PTN (p < 0.000).DiscussionPTN can be recommended in severely curved root canals in terms of maintenance of the original canal curvature, superior instrument fracture and fewer ledges. Even if training before preparation provides an acceptable level of canal shaping for preclinical students, the use of NiTi rotary instruments should be included in the undergraduate dental curriculum, contributing to an increase in the quality of root canal shaping and, consequently, to an improvement of the clinical experience of students.

scholarly journals Comparing the effect of Placebo and Prophylactic Antibiotics on asymptomatic Necrotic teeth.

2019 ◽  
Vol 26 (12) ◽  
pp. 2162-2168
Author(s):  
Muhammad Qasim ◽  
Omair Anjum ◽  
Omer Yousaf ◽  
Shoaib Khan ◽  
Madiha Pirvani
Keyword(s):  
Root Canal ◽  
Root Canal Treatment ◽  
Control Group ◽  
P Value ◽  
Chi Square ◽  
Operative Dentistry ◽  
Quasi Experimental ◽  
Chi Square Test ◽  
Test Of Significance ◽  
And Control

Objectives: Treatment of asymptomatic necrotic teeth is a common type of occurrence in endodontic practice. Root canal treatment of these teeth sometimes results in pain and /or swelling of varying degree. These severe symptoms upset both the patient and dentist. This study was to compare the effect of prophylactic amoxicillin and placebo in endodontic flare-up in asymptomatic necrotic teeth requiring root canal treatment. This was evaluated by using flare-up index. The influence of age, sex, was compared between flare-up and non-flare-up groups. Using a standardized technique and the same materials eliminated the variability of operator. Study Design: Quasi experimental study. Setting: Department of Operative Dentistry, Lahore Medical and Dental College, Lahore. Period: From January 2018 to December 2018. Material & Methods: 102 patients with asymptomatic necrotic teeth with periapical radiolucency were selected from the Operative Dentistry Department of Lahore Medical and Dental College. Patients were divided into two groups experimental and control, by convenient sampling. One half of the patients were given prophylactic amoxicillin and other half was given placebo one hour before treatment. Results: Flare-up occurred in four of the experimental and seven of the control group patients. Statistical analysis revealed no significant differences between flare-up and non- flare- up patients for age and sex. The data outcome was of qualitative in nature i.e. pain and swelling, they were subjected to Chi-Square test of significance with P value of £0.05. The results demonstrated that 10.8% of the 102 patients had a flare-up. No side effects were observed in the patients who were prescribed amoxicillin. Conclusion: The occurrence of flare-up did not significantly influence by Prophylactic amoxicillin (P= .33).

scholarly journals Extra canal in permanent maxillary first molar in patients undergoing root canal treatment at a tertiary care dental hospital, Nepal

2021 ◽  
Vol 10 (1) ◽  
pp. 47-51
Author(s):  
Archana Gharti ◽  
Neera Joshi ◽  
Kranti Prajapati ◽  
Sharada Devi Wagle ◽  
Suraj Shrestha
Keyword(s):  
Root Canal ◽  
Tertiary Care ◽  
Cross Sectional Study ◽  
Root Canal Treatment ◽  
Chi Square ◽  
Cross Sectional ◽  
Root Canals ◽  
Conservative Dentistry ◽  
Ethical Approval ◽  
Chi Square Test

Background: Permanent maxillary first molar normally has three root canals but it can have extra root canals for which several studies were done in many parts of the globe. However, this type of study to explore extra canal is lagging in the context of Nepal. Objectives: The objective was to determine the percentage of extra canal in permanent maxillary first molar in patients undergoing root canal treatment and to compare the same between male and female. Methods: The descriptive cross-sectional study was conducted in the department of conservative dentistry and endodontics of People’s Dental College and Hospital from 20th December 2019 to 20th December 2020 after receiving ethical approval from Nepal Health Research Council on 18th December 2019 (ERB protocol No 888/2019) . One hundred and eighty permanent maxillary first molar teeth without root canal calcification were enrolled. Convenient sampling was done. Access opening was done and all canal orifices were located and recorded. Data were analyzed using Statistical Package for the Social Sciences (SPSS) version 22.0 with frequency table. Chi-square test was used for inferential statistics. Results: Out of 180 teeth, extra canals were present in 44(24.4%) having more numbers in male than in females. Extra canal was present in the mesiobuccal root. Conclusion: Extra canal in the permanent maxillary first molar is present in Nepalese population with greater number in male than in female. Thus, exploration of the pulp chamber in search of an extra canal is necessary to prevent failure of root canal treatment.

scholarly journals Pattern of Disinfection of Root Canal Dentin by Alternated Acid-Base Irrigating Regimen

2019 ◽  
Vol 2019 ◽  
pp. 1-8
Author(s):  
Janir Alves Soares ◽  
Maria Auxiliadora Roque de Carvalho ◽  
Suelleng Maria Cunha Santos Soares ◽  
Rodrigo Dantas Pereira ◽  
Manoel Brito-Júnior ◽  
...  
Keyword(s):  
Enterococcus Faecalis ◽  
Root Canal ◽  
Positive Root ◽  
Chi Square ◽  
Root Canals ◽  
Chi Square Test ◽  
Root Dentin ◽  
Group 2 ◽  
Root Canal Dentin ◽  
Initial Sampling

Objective. To quantifyEnterococcus faecalisdensity in root canal dentin after chemomechanical preparation (CMP) using alternated irrigating regimen.Methodology. Root canals (RC) were contaminated withE. faecalis(ATCC 19433) for 3 weeks and evident biofilms were obtained. After initial sampling (S1), the CMP was aided by irrigants: saline solution (control; n=12), a conventional regimen (CR) (group 1; n=12) using 5.25% NaOCl and a final rinse with 17% EDTA, and an alternating regimen (AR) of intercalated use of NaOCl and EDTA (group 2, n=12), followed by a second sampling (S2). After 2 weeks, S3 was obtained. Two roots were analyzed by scanning electron microscopy. Each root was divided into cervical, mild, and apical segments and sampling of the superficial (n=90) and deep (n=90) dentin layers was obtained using Gates-Glidden burs. TheE. faecalisdensity (CFU/mg) in log10was categorized as residual (0 > 0.2), moderate (0.2 ≥ 0.5), or elevated (> 0.5). The prevalence of positive samples in BHI and BHI-A was analyzed by Pearson’s chi-square test. The data were normalized by a log10transformation of CFU and were analyzed by one-way ANOVA and Tukey’s tests.Results. Biofilms were observed only in the control root canal walls. Topographically, the controls and CR showed similar distributions ofE. faecalisin the dentin. Microbiologically positive root canals harbored muchE. faecalisin the adjacent dentin (p< 0.05). Irrigating saline provided moderate density ofE. faecalisin the dentin while CR and AR resulted in a residual density of microorganisms (p< 0.05).Conclusions. TheEnterococcus faecalisdensity in dentin was influenced by the irrigating regimen and the microbiological status of the root canal. The CMP aided by the alternating regimen interfered with the recolonization of the root canal and topographic distribution ofEnterococcusin root dentin.

scholarly journals Comparison of the Effects of a Bioceramic and Conventional Resin-Based Sealers on Postoperative Pain after Nonsurgical Root Canal Treatment: A Randomized Controlled Clinical Study

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2661
Author(s):  
Kiche Shim ◽  
Young-Eun Jang ◽  
Yemi Kim
Keyword(s):  
Postoperative Pain ◽  
Postoperative Period ◽  
Root Canal ◽  
Continuous Wave ◽  
Root Canal Treatment ◽  
Root Canals ◽  
Anterior Teeth ◽  
Significant Difference ◽  
Ah Plus ◽  
Group 2

Background: This clinical trial aimed to compare the effects of bioceramic sealer and resin-based sealer on the incidence and intensity of postoperative pain. Methods: Patients with anterior teeth or premolars requiring root canal treatment were assigned to group 1 (n = 51). Those with molars requiring treatment were assigned to group 2 (n = 57). In groups 1En and 2En, root canals were obturated with Endoseal MTA using the single-cone technique. In groups 1AH and 2AH, the sealer used was AH Plus with the continuous wave technique. On the day of canal filling, each patient was instructed to indicate their pain intensity over the 7 day postoperative period, at rest and, while biting, using a visual analog scale. Results: There was no significant difference in the incidence or intensity of postoperative pain between the Endoseal MTA and AH Plus groups during the 7 day postoperative period (p > 0.05). Less time was needed to seal the root canals with Endoseal MTA, especially in group 2 (p < 0.05). Conclusions: Endoseal MTA and AH Plus had similar effects on the incidence and intensity of postoperative pain. The obturation time was shorter when using Endoseal MTA compared to AH Plus.

scholarly journals Radiographic analysis of 1000 cast posts in Sergipe state, Brazil

2017 ◽  
Vol 46 (5) ◽  
pp. 255-260
Author(s):  
Caroline Garcez MENDONÇA ◽  
José Rogério Vieira de ALMEIDA ◽  
Wilton Mitsunari TAKESHITA ◽  
Fábio MARTINS ◽  
Monica Silveira PAIXÃO
Keyword(s):  
Root Canal ◽  
Endodontically Treated Teeth ◽  
Chi Square ◽  
Root Canal Filling ◽  
Cast Metal ◽  
Restorative Treatment ◽  
Se Brazil ◽  
Chi Square Test ◽  
Metal Post

Abstract Introduction Endodontically treated teeth with extensive coronary destruction require posts and cores to enable prosthetic restoration. Despite the increasing use of prefabricated posts, cast metal posts and cores are still widely used. The quality of the latter is important for the longevity of restorative treatment, and failure can occur if the fundamental principles are not followed. Objective To radiographically evaluate the prosthetic principles of 1000 cast metal post-and-core restorations performed in single-rooted teeth and their coherence with the principles used for their confection. Material and method Digital periapical radiographs of 1000 endodontically treated, single-rooted teeth with cast metal posts and cores were selected from the collection of a radiology clinic (Centro de Imagem, Aracaju/SE, Brazil). The images were analyzed using a measurement software (ImageJ, USA) in accordance with the fundamental prosthetic principles: length and diameter of the post, ratio between post and bone crest, contiguity of post to the root canal, gap between post and the remaining root canal filling, amount of remaining root canal filling, and absence of periapical lesion. The data were qualitatively analyzed, classified into ideal and not ideal, and submitted to the chi-square test (α=0.05). Result Only 6.7% of the cast metal posts analyzed were satisfactorily fabricated. Conclusion Many prosthetic criteria are neglected during the manufacturing of cast metal post and cores, resulting in inadequate work that may compromise the longevity of restorative treatments.

scholarly journals Prevalence evaluation of apical periodontitis and its relationship with endodontic and restorative treatment in a community in Southern Brazil

2020 ◽  
Vol 23 (1) ◽  
Author(s):  
Julia Machado Saporiti ◽  
Andressa Gomes ◽  
Melissa Feres Damian ◽  
Nadia De Souza Ferreira
Keyword(s):  
Root Canal ◽  
Apical Periodontitis ◽  
Endodontic Treatment ◽  
Endodontically Treated Teeth ◽  
Chi Square ◽  
Root Canal Filling ◽  
Restorative Treatment ◽  
Anterior Teeth ◽  
Chi Square Test

Objective: The aim of this study was evaluate radiographically prevalence of apical periodontitis (AP) in endodontically treated teeth (ETT) and relate with demographic factors, quality of endodontic treatment and coronal restoration. Material and methods: Data were collected from dental records wich contained full-mouth radiographic series. In ETT, arch, dental group and presence of AP were evaluated. Quality of root canal filling, presence and quality of coronal restoration and type of restorative material were also collected. Data were evaluated using descriptive statistics and Chi-square Test. Results: Of 70 patients included in the final sample, the majority were female (54.3%) and age ranged from 13 to 77 years (47.14 ± 13.18). Of 1,333 teeth evaluated, 73 (5.4%) had endodontic treatment, being the majority maxillary (74%) and anterior teeth (52.1%). Of teeth without endodontic treatment, 320 (25.4%) had AP. Failure rate was high (52.8%) and quality of root canal filling and coronal restoration were considered inadequate in majority cases (58.3% and 47.7%, respectively). Dental group had a statistically significant relationship with presence of AP in ETT, being more frequent in anterior teeth (p = 0.019). Conclusion: It was concluded that prevalence of AP in ETT was high and dental group was the factor that most influenced prevalence of AP in ETT.KeywordsApical periodontitis; Radiography; Root canal filling.

scholarly journals Effects of Diode Laser, Gaseous Ozone, and Medical Dressings onEnterococcus faecalisBiofilms in the Root Canal Ex Vivo

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Kerstin Bitter ◽  
Alexander Vlassakidis ◽  
Mediha Niepel ◽  
Daniela Hoedke ◽  
Julia Schulze ◽  
...  
Keyword(s):  
Diode Laser ◽  
Root Canal ◽  
Ex Vivo ◽  
Bacterial Reduction ◽  
Chi Square ◽  
Root Canals ◽  
Planktonic Bacteria ◽  
Gaseous Ozone ◽  
Colony Forming Units ◽  
Chi Square Test

The objective was to compare the antibacterial effects of adjunctive disinfection using diode laser and gaseous ozone compared to the medical dressings calcium hydroxide (Ca(OH)2) and chlorhexidine gel (CHX-Gel) onEnterococcus faecalisbiofilms in human root canals ex vivo. Root canals of 180 human extracted teeth were infected byE. faecalisand divided into 3 main groups (G): G1, control; G2, instrumentation and irrigation using 0.9% NaCl; G3, instrumentation and irrigation using 1% NaOCl. In each main group, the following treatments were applied: gaseous ozone, diode laser, and medical dressings of Ca(OH)2or CHX-Gel for 7 days (n=15). Reduction of colony forming units (CFUs) inside the root canal of planktons and frequencies of adherent bacteria after treatment were calculated. Bacterial reduction was significantly affected by the irrigation protocol (p<0.0005) and the disinfection method (p<0.0005), and a significant interaction between both factors could be observed (p<0.0005; ANOVA). In G3 (instrumentation using 1% NaOCl), no significant effect of disinfection methods could be demonstrated on planktonic bacteria (p=0.062; ANOVA) and frequencies of adherent bacteria (p>0.05; chi-square test). Instrumentation and irrigation using NaOCl combined with ozone or laser application resulted in comparable bacterial reduction onE. faecalisto the application of medical dressings.

scholarly journals Effectiveness of ProTaper Retreatment System associated with Organic Solvents in the Removal of Root Canal Filling Material

2013 ◽  
Vol 4 (3) ◽  
pp. 175-179
Author(s):  
Renato de Toledo Leonardo ◽  
Gisselle Moraima Chávez-Andrade ◽  
Milton Carlos Kuga ◽  
Flávia Angélica Guiotti ◽  
Gisele Faria ◽  
...  
Keyword(s):  
Organic Solvents ◽  
Root Canal ◽  
Filling Material ◽  
Root Canal Filling ◽  
Universal System ◽  
Orange Oil ◽  
Root Canals ◽  
Covered Area ◽  
Rotary Instruments ◽  
Root Canal Dentin

ABSTRACT Aim To evaluate the effectiveness of ProTaper universal retreatment system in the removal of root canal filling material with thermomechanical compaction, in comparison to manualmechanical technique, associated with orange oil or eucalyptol. Materials and methods Forty extracted lower incisors were filled with thermomechanical compaction technique. After 3 years, the root canal filling was removed by: G1 - manualmechanical technique with orange oil; G2 - manual-mechanical technique with eucalyptol; G3 - ProTaper universal retreatment system with orange oil and G4 - ProTaper universal retreatment system with eucalyptol. In sequence, all root canals were instrumented to F5 instrument. The teeth were longitudinally grooved, images of buccal half were obtained in stereomicroscope and covered area by root canal filling material was measured using image tool software, in cervical, middle and apical radicular thirds. The results were subjected ANOVA and Tukey test (p = 0.05). Results In all thirds, the manual-mechanical technique showed lower presence of root canal filling material on root canal dentin in comparison to ProTaper retreatment universal system, regardless of organic solvent used (p < 0.05). There is no difference between organic solvents in removal root canal filling material (p > 0.05). Conclusion The ProTaper universal retreatment system showed lower effectiveness in removal root canal filling material than manual-mechanical technique, regardless of organic solvents (orange oil or eucalyptol oil) used. Clinical significance Recently rotary instruments have been proposed to removal of root canal filling material. However, there are no studies evaluating its effectiveness in removal root canal filling material in association with orange oil or eucalyptol oil. How to cite this article Guiotti FA, Kuga MC, de Toledo Leonardo R, Chávez-Andrade GM, Magro MG, Cavenago BC, Faria G. Effectiveness of ProTaper Retreatment System associated with Organic Solvents in the Removal of Root Canal Filling Material. World J Dent 2013;4(3):175-179.

scholarly journals Association of type of file fracture and method of removal in a university setting

2020 ◽  
Vol 11 (SPL3) ◽  
pp. 1761-1765
Author(s):  
Preethi Mariona ◽  
Delphine Priscilla Antony S ◽  
Sreedevi Dharman
Keyword(s):  
Root Canal ◽  
Fracture Incidence ◽  
Common Method ◽  
Root Canal Treatment ◽  
Canal System ◽  
Chi Square ◽  
Chi Square Test ◽  
Root Canal System ◽  
University Setting

Some mishaps tend to occur during treatment in the root canal system, for example, file fractures. The challenge of the removal depends on the type of file fractured and the method which is used to remove it, generally it is decided based on the level of the fracture. Any file can fracture inside the root canal which is based on the curvature, anatomy. Specific techniques and measures have been employed to remove this file from the root canal system. The aim of the study is to find the association of file fracture with the method of removal. The details of all patients who underwent a root canal treatment where noted and the details of 16 patients with file fractures during the procedure were shortlisted. The type of file fractures was analyzed, such as K files, rotary files, H files, other instruments. The method of removal was usually ultrasonic, mechanical, manual or combination of any of the above. Excel tabulation was done and imported to SPSS for results. Chi-square test performed. The most common and used file to fracture in the root canal system was rotary files which had a fracture incidence of 31% and most common method used to retrieve was using ultrasonic of an incidence of 37.5. Chi-square test shows p>0.05, which is statistically not significant. The study concludes that rotary files fracture the most and the method used to retrieve them was mechanical, but as a whole, the most common method used was ultrasonic.

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