Influence of Apical Patency, Coronal Preflaring and Calcium Hydroxide on the Accuracy of Root ZX Apex Locator for Working Length Determination: An In Vitro Study

2021 ◽  
pp. 232020682110361
Author(s):  
Mostafa Godiny ◽  
Reza Hatam ◽  
Roya Safari-Faramani ◽  
Atefeh Khavid ◽  
Mohammad Reza Rezaei
Keyword(s):  
Calcium Hydroxide ◽  
Root Canal ◽  
In Vitro Study ◽  
Study Groups ◽  
Vitro Study ◽  
Rank Test ◽  
Extensive Experience ◽  
Human Teeth ◽  
Working Length

Aim: One of the main steps in a successful endodontic treatment is determining the correct working length (WL) of the root canal. In this regard, electronic apex locators (EAL) have been widely used for measuring the WL. The accuracy of EALs in determining the WL may be influenced by various factors. This study is aimed to evaluate the effects of apical patency, coronal preflaring, and calcium hydroxide on the accuracy of the EAL. Materials and Methods: In this in vitro study, 20 central incisor single-rooted human teeth with fully formed apex were considered. Then, samples were randomly divided into two study groups, ten samples in each group. The WL was determined and recorded at 0.5 mm distance to the apex using Root ZX apex locator before and after creating patency, coronal preflaring, and calcium hydroxide administration. All WLs were measured separately for each tooth and reviewed independently by two experienced operators with extensive experience in using EALs. Paired t test and Wilcoxon signed-rank test were applied and the significant level was at .05. Results: Statistical analysis of the obtained data showed a significant decline in the WL after apical patency and coronal preflaring ( P < .05). Moreover, WL exhibited a significant enhancement after calcium hydroxide application ( P < .05). Conclusion: Apical patency and coronal preflaring increased the accuracy of apex locators in determining the WL of the teeth. Besides, calcium hydroxide residues in the root canal reduced the accuracy of the apex locator.

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

scholarly journals Erratum: Number of Dental Stem Cells on Root Canal Dentin after Application of Triple Antibiotic Paste or Calcium Hydroxide: An In Vitro Study

2019 ◽  
Vol 13 (02) ◽  
pp. e1-e1
Author(s):  
Konstantinos Gougousis ◽  
Dimitrios G. Giannakoulas ◽  
Vasiliki Taraslia ◽  
Anastasia Agrafioti ◽  
Ema Anastasiadou ◽  
...  
Keyword(s):  
Stem Cells ◽  
Calcium Hydroxide ◽  
Root Canal ◽  
In Vitro Study ◽  
Vitro Study ◽  
Dental Stem Cells ◽  
Triple Antibiotic Paste ◽  
Root Canal Dentin

Effect of Calcium Hydroxide as a Root Canal Dressing Material on Dentin Fracture Strength In Primary Teeth–In Vitro Study

2018 ◽  
Vol 42 (2) ◽  
pp. 146-149
Author(s):  
Fadi Said ◽  
Moti Moskovitz
Keyword(s):  
Calcium Hydroxide ◽  
Fracture Strength ◽  
Root Canal ◽  
Primary Teeth ◽  
In Vitro Study ◽  
Vitro Study ◽  
Root Canal Treatment ◽  
Root Canals ◽  
Anterior Teeth

Objectives: The aim of the present study was to assess the effect of calcium hydroxide as a root canal dressing material on dentin microtensile fracture strength in human primary teeth in vitro. Study design: Thirty primary anterior teeth with root canals packed with calcium hydroxide were divided into groups of ten and immersed in saline at room temperature for 7, 30 and 90 days. Ten teeth with root canals filled with sterile saline were the control group. Microtensile fracture strength was measured in Mechanical tester Lloyd testing machine. Results: There was a significant difference (P &lt; 0.05) between the fracture strength of the calcium hydroxide-filled teeth after 90 days (19.1 MPa) compared with the control (35.8 MPa). Dentin microtensile fracture strength of the calcium hydroxide-filled teeth decreased at an average of 0.142 MPa per day. Conclusion: Calcium hydroxide placed in root canals for an extended time had a significantly negative effect on root strength. Long-term success of root canal treatment in primary anterior teeth is estimated as 65% with most of the failures result from trauma recurrence. Clinical Relevance: Our results stress the need to evaluate the pros and cons of root canal treatment compared to extractions of non-vital primary incisors.

scholarly journals A comparative evaluation of irrigation methods for calcium hydroxide removal from the root canal: An in vitro study

2021 ◽  
Vol 04 (02) ◽  
Author(s):  
Masako Nakano ◽  
Yuko Yamamoto ◽  
Ami Misawa ◽  
Shunjiro Yamakawa ◽  
Takumasa Yoshida ◽  
...  
Keyword(s):  
Calcium Hydroxide ◽  
Root Canal ◽  
Comparative Evaluation ◽  
In Vitro Study ◽  
Vitro Study ◽  
Irrigation Methods ◽  
Calcium Hydroxide Removal
Sign in / Sign up

Export Citation Format

Share Document