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 Effectiveness of a silicon-based root canal sealer for filling of simulated lateral canals

2007 ◽  
Vol 18 (1) ◽  
pp. 20-23 ◽  
Author(s):  
João Vicente Baroni Barbizam ◽  
Matheus Souza ◽  
Doglas Cecchin ◽  
Jakob Dabbel
Keyword(s):  
Root Canal ◽  
In Vitro Study ◽  
Root Canal Sealer ◽  
Human Teeth ◽  
Significance Level ◽  
Working Length ◽  
Group 3 ◽  
Group 2 ◽  
Silicon Based

The purpose of this in vitro study was to evaluate the ability of a silicon-based root canal sealer, compared to zinc oxide and eugenol and an epoxy resin-based sealers, for filling of simulated lateral canals. Thirty extracted single-rooted human teeth were selected, conventional access was made and the working length was established 1 mm from the apical foramen. Three simulated lateral canals, one in each root third (coronal, middle and apical) were prepared in both the mesial and distal surfaces of each tooth using a size 15 reamer adapted to a low-speed handpiece. Each root canal was instrumented using ProTaper rotary files up to file F3 at the working length, and then irrigated with 2.5% NaOCl followed by EDTA. The teeth were assigned to 3 groups (n=10), according to the root canal sealer: Roeko Seal (Group 1), Sealer 26 (group 2) and Grossman's sealer (Group 3). Gutta-percha cold lateral condensation technique was performed in all groups. Postoperative radiographs were taken and the images were projected for evaluation of the quality of lateral canal filling. Data were submitted to statistical analysis by Kruskal Wallis test at 5% significance level. The results showed that Grossman's sealer filled a larger number of lateral canals than Roeko Seal (p<0.05) and Sealer 26 (p<0.01). It may be concluded that Roeko Seal silicone-based root canal sealer was not as effective as the Grossman's sealer for filling of simulated lateral canals. The lateral canals localized in the apical third of the root were more difficult to be filled.

scholarly journals A Comparative Evaluation of Four Different Techniques for Determining the Accuracy of Root Canal Working Length: An In Vitro Study

2020 ◽  
Vol 11 (2) ◽  
pp. 33
Author(s):  
RakeshKumar Yadav ◽  
Harsh Bhoot ◽  
Anil Chandra ◽  
Promila Verma ◽  
Ramesh Bharti ◽  
...  
Keyword(s):  
Root Canal ◽  
Comparative Evaluation ◽  
In Vitro Study ◽  
Vitro Study ◽  
Working Length

Comparison of apical debris extrusion during root canal preparation in primary molars using different file systems: an in vitro study

2021 ◽  
Author(s):  
Davood Mohammadi ◽  
Majid Mehran ◽  
Roland Frankenberger ◽  
Newsha BabeveyNejad ◽  
Morteza Banakar ◽  
...  
Keyword(s):  
Root Canal ◽  
File Systems ◽  
In Vitro Study ◽  
Vitro Study ◽  
Primary Molars ◽  
Root Canal Preparation

Force and vibration analysis in biomechanical preparation of root canals using reciprocating endodontic file system: In vitro study

2021 ◽  
pp. 095441192110442
Author(s):  
Vinod Singh Thakur ◽  
Pavan Kumar Kankar ◽  
Anand Parey ◽  
Arpit Jain ◽  
Prashant Kumar Jain
Keyword(s):  
Root Canal ◽  
Vibration Analysis ◽  
File System ◽  
In Vitro Study ◽  
Root Canal Preparation ◽  
Root Canals ◽  
Improper Use ◽  
Four Levels ◽  
Root Canal Instrumentation

The shaping and cleaning of the root canal are very important in root canal treatment. The excessive force and vibration during biomechanical preparation of the root canal may result in failure of the endodontic file. In this study, force and vibration analysis was carried out during root canal preparation. The samples of human extracted (premolar) teeth were provided by the College of Dental Science and Hospital. Endodontic instruments for reciprocating motion, such as the WaveOne Gold file system, had been used for root canal preparation. Force and vibration signals were recorded by dynamometer and accelerometer, respectively. The acquired signals were denoised using the db4 (SWT denoising 1-D) wavelet. Four levels of decomposition were carried out for each signal. The signal denoising technique was used to remove unwanted noise from the acquired signal. FESEM analysis was used to visualize the levels of severity of endodontic files during the cleaning and shaping of the root canal. In most of the cases, the failure occurred due to the improper use of the root canal instrumentation. The optimum amount of force was used to avoid the file failure and provided the proper instrumentation. The curve fitting regression model was used to find the interdependency between force and vibration.

An In Vivo Evaluation of Two Types of Files used to Accurately Determine the Diameter of the Apical Constriction of a Root Canal: An In Vivo Study

2009 ◽  
Vol 10 (4) ◽  
pp. 43-50 ◽  
Author(s):  
Narendra Manwar ◽  
Sumeet Darda ◽  
D.D. Shori
Keyword(s):  
Root Canal ◽  
Univariate Analysis ◽  
File Size ◽  
In Vivo Evaluation ◽  
Apical Constriction ◽  
Iso Standard ◽  
Mean Values ◽  
Canal Diameter ◽  
Working Length

Abstract Aim The aim of this study was to compare sizes of the first instrument with or without a taper that binds at the apical constriction of a root canal after coronal flaring. Methods and Materials A total of 310 canals were evaluated in patients presenting for root canal therapy. Canals with intact apices were selected. After gaining straight line endodontic access, the coronal third was flared using Gates-Glidden drills. Working length was determined using an apex locator. ISO Standard K-files (tapered) were passively introduced into the canals starting with a No. 15 file. The first K-file size to bind against the canal walls without pushing and to reach the working length was recorded as the FKFB (First K File to Bind). Next, ISO Standard Lightspeed files (non-tapered instruments) starting with No. 20 were then gently introduced by hand to each canal in ascending order to the working length. The first size of a Lightspeed instrument to bind against the canal walls and reach the working length was recorded as FLSB (First Light Speed to Bind). In all instances a larger file was introduced to ensure it could not reach the same depth (i.e., working length). Statistical analysis was carried out using a univariate analysis of variance (ANOVA). Results The average size of the FLSB to bind against the canal walls first at the working length was approximately two ISO sizes larger than the FKFB (P<0.001). Conclusion The clinician should consider introducing a non-tapered instrument to working length after coronal flaring because determination of the initial narrow apical canal diameter plays a major factor in identifying the extent of final apical shaping. Because the first non-tapered instrument that binds the apical constriction is larger than the corresponding tapered instrument, it better reflects the actual narrow apical diameter of the canal. Clinical Significance The initiation of canal instrumentation with a K-file size three sizes beyond the mean values of the FLSB will result in greater final enlargement of the canal compared to starting with the FKFB. This increased canal enlargement facilitates improved mechanical and chemical cleansing of the root canal ensuring removal of more microorganisms and their substrates, thus, improving the outcome of the treatment. Citation Darda S, Manwar N, Chandak M, Shori DD. An In Vivo Evaluation of Two Types of Files used to Accurately Determine the Diameter of the Apical Constriction of a Root Canal: An In Vivo Study. J Contemp Dent Pract 2009 July; (10)4:043-050.

Sign in / Sign up

Export Citation Format

Share Document