The use of micro-computed tomography to determine the accuracy of electronic working length with two apex locators

Suguro, Hisashi; Nishihara, Anna; Tamura, Tohru; Nakamura, Takeshi; Toyama, Yurika; Takeichi, Osamu

doi:10.2334/josnusd.20-0466

Cited by 7 publications

(2 citation statements)

References 26 publications

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“…Because of the physiological root resorption that occurs in primary teeth, the correct detection of the WL is of great importance. Therefore, clinicallyacceptable error tolerance was stated to be ±0.5 mm or ±1 mm [17,18]. In this study, the accuracy of the Root ZX mini EAL was evaluated using both ±0.5 and ±1 mm AWLs.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of accuracy of an electronic apex locator in presence of sodium hypochlorite in primary teeth with and without resorption

2023

Journal of Clinical Pediatric Dentistry

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This study compared the accuracy of Root ZX mini apex locator in presence of sodium hypochlorite (NaOCl) in primary molars with and without apical resorption. Sixty-four extracted primary lower molar teeth with 32 root resorption and 32 without resorption were selected. To determine the actual working length (AWL), a K-file was inserted into the root canal until the tip of the file was visible at the major foramen or the resolution level. It was then withdrawn 1 mm. This value was recorded as AWL. The teeth were then divided subgroups (with/without NaOCl). To determine the electronic working length, a Root ZX mini apex locator in canals with/without NaOCl was used. A K-file was inserted into the canal to just beyond the foramen, as indicated by the flashing “APEX” bar, and the electronic working length was determined by subtracting 1 mm from this length. The deviation of the Root ZX mini measurement from the AWL was determined. Student’s t-test was used for statistical analysis. In teeth with no resorption, the measurement accuracy rates (within+/−0.5 mm) of non-NaOCl and NaOCl groups were 84.37% and 81.25%, respectively (p > 0.05); within+/−1 mm, the non-NaOCl and NaOCl demonstrated 100% and 96.87% accuracy, respectively (p > 0.05). In teeth with resorption, the measurement accuracy rates (within+/−0.5 mm) was 81.25% for the non-NaOCl and 62.50% for the NaOCl, respectively (p < 0.05). The measurement accuracy rates (within+/−1 mm) of the non-NaOCl and NaOCl was 96.87% and 84.37%, respectively (p < 0.05). The presence of NaOCl in the root canal affected the accuracy of the Root ZX mini in primary teeth with apical resorption, but not in teeth without resorption.

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Section: Discussionmentioning

confidence: 99%

Evaluation of accuracy of an electronic apex locator in presence of sodium hypochlorite in primary teeth with and without resorption

2023

Journal of Clinical Pediatric Dentistry

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“…Since its development, numerous electronic devices have been introduced in the market, and their accuracy has been analyzed. Current models can perform readings under different conditions inside the root canal (Çinar & Üstüm 2020;Bernardes et al, 2021;Saritha et al, 2021;Suguro et al 2021). However, studies have found conflicting results for EALs using different irrigants (Baruah et al 2018;Marek et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the effect of irrigants on the accuracy and repeatability of three electronic apex locators: an ex vivo study

D’Assunção

Silva

Arnaud

et al. 2021

RSD

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Objective: To evaluate the effect of 2% chlorhexidine (CHX) and 2.5% sodium hypochlorite (NaOCl) on the accuracy and repeatability of three Electronic Apex Locators (EALs). Methodology: Thirty one human teeth were connected to a platform, irrigated with 2.0% CHX, and obtained two readings, again irrigated with 2.5% NaOCl and obtained two more readings. The distance between the tip of the file and the apical constriction was measured. Repeatability was calculated using the intraclass correlation coefficient (ICC) and repeatability coefficient (CR). Results: For CHX 2%, with the Mini Apex Locator, 25 of 31 electronic measurements were accurate (80.6%), 28 of 31 measurements for iPex (90.3%) and for Root ZX II 26 (83, 9%). For 2.5% NaOCl, with the Mini Apex Locator, 25 of the 31 measurements were accurate (80.6%), 28 of the 31 measurements for the iPex (90.3%) and for the Root ZX II, 24 (77, 4%). There were no differences between the two irrigants (p>0.05). The values (ICC) were 0.975 and 0.994 for the Mini Apex Locator, 0.981 and 0.971 for the i Pex and 0.994 and 0.995 for the Root ZX II. When using CHX, the (CR) was 0.196 for the Mini Apex Locator, 0.152 for the iPex and 0.088 for the Root ZX II. When using 2.5% NaOCl, the (CR) was 0.088 for the Mini Apex Locator, 0.196 for the iPex and 0.088 for the Root ZX II. Conclusions: The use of 2% CHX and 2.5% NaOCl did not affect the accuracy and repeatability of the three devices.

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Advances in Working Length Determination

Nekoofar¹

2022

Endodontic Advances and Evidence‐Based Clinical Guidelines

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The use of micro-computed tomography to determine the accuracy of electronic working length with two apex locators

Cited by 7 publications

References 26 publications

Evaluation of accuracy of an electronic apex locator in presence of sodium hypochlorite in primary teeth with and without resorption

Evaluation of accuracy of an electronic apex locator in presence of sodium hypochlorite in primary teeth with and without resorption

Evaluation of the effect of irrigants on the accuracy and repeatability of three electronic apex locators: an ex vivo study

Advances in Working Length Determination

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