scholarly journals Influence of Root Canal Preparation on Formation of Dentinal Microcracks: A Systematic Review

2020 ◽  
Vol 31 (3) ◽  
pp. 201-220
Author(s):  
Alânia Dalla Valle ◽  
Lara Dotto ◽  
Renata Dornelles Morgental ◽  
Tatiana Pereira-Cenci ◽  
Gabriel Kalil da Rocha Pereira ◽  
...  
Keyword(s):  
Systematic Review ◽  
Root Canal ◽  
Preparation Technique ◽  
Micro Computed Tomography ◽  
Root Canal Preparation ◽  
Eligibility Criteria ◽  
Working Length ◽  
Microcrack Initiation ◽  
Preparation Techniques

Abstract The effect of root canal preparation technique on microcrack initiation is a controversial issue. This systematic review aimed to assess the role of root canal preparation techniques with different kinematics (manual, rotary, reciprocating, adaptive, self-adjusting file) on microcrack initiation. In vitro and in situ studies comparing the influence of at least two different root canal preparation techniques on the initiation of dentin microcracks were searched in PubMed/MEDLINE and SCOPUS up to June 5, 2018 without language and period restriction. Two authors independently reviewed all identified titles and abstracts for eligibility. Tables were generated to summarize the included studies, and the included studies were assessed for bias. Fifty-four (n=54) articles met the eligibility criteria. The results were classified according to the method used for microcrack evaluation, and most studies that used micro-computed tomography showed no formation of new cracks after root canal preparation. In general, the instrumentation techniques induced microcrack formation when the methods were destructive, irrespective of kinematics. In relation to the apex region, when the preparation working length was set as the root canal length subtracted of 1 mm, the risk of microcrack initiation reduces. The majority of the included studies had low risk of bias for all assessed domains. Our results seem to indicate that the various root canal preparation techniques considered in this study will not cause damage to the dental structure when adequately employed and the proper methodology is applied.

scholarly journals A Survey of Endodontic Practices among Dentists in Nigeria

2013 ◽  
Vol 14 (2) ◽  
pp. 293-298 ◽  
Author(s):  
Hamid Jafarzadeh ◽  
Christopher I Udoye ◽  
Matthew A Sede ◽  
Paul V Abbott
Keyword(s):  
Root Canal ◽  
Antibiotic Use ◽  
High Rate ◽  
Root Canal Preparation ◽  
Root Canal Therapy ◽  
Quality Guidelines ◽  
Working Length ◽  
Length Determination ◽  
Self Administered Questionnaire ◽  
Preparation Techniques

ABSTRACT Aim To investigate the pattern of routine endodontic practices among Nigerian dentists. Materials and methods This study was a questionnaire-based survey of samples of dentists in the Nigerian cities of Enugu and Benin. The self-administered questionnaire contained 25 close-ended questions with multiple choice options. The data collected included demographic details of respondents, root canal preparation techniques, irrigants and intracanal medicaments used, the number of appointments, method of working length determination, root filling techniques, cements used, and the scope of treatment performed. Results Most respondents used sodium hypochlorite as the irrigant, the step back technique for canal preparation, and lateral condensation with a zinc oxide-eugenol-based sealer for obturation. Most respondents did root canal treatment on all types of teeth and used radiographs to determine the working length 70% of the time. Most respondents followed up their patients for less than 12 months and most treated teeth with periapical areas larger than 10 mm by root canal therapy combined with apical surgery. Conclusion Most Nigerian dentists use step back technique for canal preparation and lateral condensation for obturation. Clinical significance Endodontic practice by Nigerian dentists differs from some established practice quality guidelines in many other countries, particularly in nonperfusion of modern techniques into practice, popularity of antibiotic use for endodontic emergencies and a high rate of perforations. How to cite this article Udoye CI, Sede MA, Jafarzadeh H, Abbott PV. A Survey of Endodontic Practices among Dentists in Nigeria. J Contemp Dent Pract 2013;14(2):293-298.

scholarly journals The Effect of File Size and Type and Irrigation Solutions on the Accuracy of Electronic Apex Locators: An In Vitro Study on Canine Teeth

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Maciej Janeczek ◽  
Piotr Kosior ◽  
Dagmara Piesiak-Pańczyszyn ◽  
Krzysztof Dudek ◽  
Aleksander Chrószcz ◽  
...  
Keyword(s):  
Root Canal ◽  
Therapeutic Process ◽  
In Vitro Study ◽  
Nickel Titanium ◽  
File Size ◽  
Root Canal Preparation ◽  
Apical Constriction ◽  
Working Length ◽  
Termination Point

Measurements of the root canal during endodontic treatment have a significant influence on the course of the therapeutic process as well as on its final result in both human and veterinary medicine. The apical constriction should be the termination point for the preparation and filling of the root canal. This research was conducted with the use of a Septodont kit consisting of a small chamber filled with the examined solution in which a healthy second incisor was placed. The step back method was applied for the root canal preparation and master apical file of 30 was used. The working length was 22 mm. The examination was conducted with the use of steel as well as nickel titanium hand instruments. Different irrigation solutions and two types of apex locators were used. Measurements of the working length of the root canal showed dependence on the size of the instrument. Examinations carried out in various environments showed that analogical measurements were obtained only for sodium hypochlorite solutions. In other environments the measured sections were shortened. Comparative examinations with the use of steel instruments demonstrated insignificant measurement differences. Compared to these results, the measurements in nickel titanium group were characterized by more considerable deviations.

scholarly journals NSK reciprocating handpiece: in vitro comparative analysis of dentinal removal during root canal preparation by different operators

2006 ◽  
Vol 17 (1) ◽  
pp. 10-14 ◽  
Author(s):  
Márcia Helena Wagner ◽  
Fernando Branco Barletta ◽  
Magda de Souza Reis ◽  
Luciano Loureiro Mello ◽  
Ronise Ferreira ◽  
...  
Keyword(s):  
Root Canal ◽  
The Other ◽  
Dental Student ◽  
Root Canal Preparation ◽  
Significance Level ◽  
Group 4 ◽  
Working Length ◽  
Significant Difference ◽  
General Dentist

The purpose of this study was to assess dentin removal during root canal preparation by different operators using a NSK reciprocating handpiece. Eighty-four human single-rooted mandibular premolars were hand instrumented using Triple-Flex stainless-steel files (Kerr) up to #30, weighed in analytical balance and randomly assigned to 4 groups (n=21). All specimens were mechanically prepared at the working length with #35 to #45 Triple-Flex files (Kerr) coupled to a NSK (TEP-E10R, Nakanishi Inc.) reciprocating handpiece powered by an electric motor (Endo Plus; VK Driller). Groups 1 to 4 were prepared by a professor of Endodontics, an endodontist, a third-year dental student and a general dentist, respectively. Teeth were reweighed after root canal preparation. The difference between weights was calculated and the means of dentin removal in each group were analyzed statistically by ANOVA and Tukey's test at 5 % significance level. The greatest amount of dentin removal was found in group 4, followed by groups 2, 3 and 1. Group 4 differed statistically from the other groups regarding dentin removal means [p<0.001 (group 1); p=0.005 (group 2); and p=0.001 (group3)]. No statistically significant difference was found between groups 1 and 2 (p=0.608), 1 and 3 (p=0.914) and 2 and 3 (p=0.938). In conclusion, although the group prepared by a general dentist differed statistically from the other groups in terms of amount of dentin removal, this difference was clinically irrelevant. The NSK reciprocating handpiece powered by an electric engine was proved an effective auxiliary tool in root canal preparation, regardless of the operator's skills.

scholarly journals Root canal curvature as a prognostic factor influencing the diagnostic accuracy of radiographic working length determination and postoperative canal axis modification: an in vitro comparative study

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Bestoon Mohammed Faraj
Keyword(s):  
Root Canal ◽  
Radiographic Images ◽  
The Real ◽  
Root Canals ◽  
Length Estimation ◽  
Working Length ◽  
Length Determination ◽  
Case Difficulty Assessment ◽  
The Impact

Abstract Background Radiographic analysis of tooth morphology is mandatory for accurate calibration of the degree of canal curvature angle and radiographic working length to its real dimensions in case difficulty assessment protocols. This study aimed to determine the impact of the degree of root canal curvature angle on maintaining the real working length and the original canal axis of prepared root canals using a reciprocating rotary instrumentation technique. Methods Radiographic image analysis was performed on 60 extracted single-rooted human premolar teeth with a moderate canal curvature (10°–25°) and severe canal curvature (26°–70°). Working length and longitudinal canal axis were determined using cone-beam computed tomography (CBCT) and digital periapical radiography. The real canal length was determined by subtracting 0.5 mm from the actual canal length. Root canals were prepared using the WaveOne Gold reciprocating file (Dentsply Maillefer, Ballaigues, Switzerland). Results There was no significant relation of the degree of canal curvature angle to the accuracy of radiographic working length estimated on CBCT and digital periapical radiographic techniques (P > 0.05). Postinstrumentation changes in the original canal axis between moderate and severe canal curvature angles, assessed on CBCT and periapical digital radiographic images were statistically non-significant (P > 0.05). Conclusions A standardized digital periapical radiographic method performed similarly to the CBCT technique near to its true working length. No significant interaction exists between the diagnostic working length estimation, postoperative root canal axis modification, and the degree of canal curvature angle, using reciprocating rotary instrumentation technique.

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