IADR Abstract Archives
Evaluation the Accuracy of Apex Locator When Electronic Devices Nearby
Objectives: Electronic apex locator (EAL) is an important device to determine the working length (WL) during endodontic treatments. However, it’s not known whether the EAL still be accurate to determine the WL when other electronic devices with different wave frequencies nearby. The purpose of this in vitro study was to compare the electronic working length (EWL) measured by EAL when electronic device is nearby with the actual working length (AWL).
Methods: In this study, forty-five single-rooted extracted human teeth without carious lesions or fractures or apical resorption were used. Selected teeth were cleaned, accessed and observed under stereo microscope (x10) in order to determine the AWL. The EWL measurement was performed under 3 conditions: (1) electronically, without any electronic devices at a distance of 2m from the EAL; (2) electronically, with cell phone activated by a call at a distance of 50cm from the EAL; (3) electronically, with active wireless router at a distance of 50cm from the EAL. The percentage of the teeth with the EWL that differed by 0.5mm from the AWL was recorded. The Chi-square test was used to compare the differences of the rate between three groups. In all analyses, P<0.05 was considered as significant.
Results: The percentage differences within 0.5mm between EWL in each measuring condition and AWL: 75.6% (34 teeth) in condition (1), 71.1% (32 teeth) in condition (2), 80.0% (36 teeth) in condition (3). No statistically significant differences were recorded between the different groups (P>0.05).
Conclusions: Within the limitations of the present study, it can be concluded that EWL is not influenced by the presence of cell phone or wireless router.
Methods: In this study, forty-five single-rooted extracted human teeth without carious lesions or fractures or apical resorption were used. Selected teeth were cleaned, accessed and observed under stereo microscope (x10) in order to determine the AWL. The EWL measurement was performed under 3 conditions: (1) electronically, without any electronic devices at a distance of 2m from the EAL; (2) electronically, with cell phone activated by a call at a distance of 50cm from the EAL; (3) electronically, with active wireless router at a distance of 50cm from the EAL. The percentage of the teeth with the EWL that differed by 0.5mm from the AWL was recorded. The Chi-square test was used to compare the differences of the rate between three groups. In all analyses, P<0.05 was considered as significant.
Results: The percentage differences within 0.5mm between EWL in each measuring condition and AWL: 75.6% (34 teeth) in condition (1), 71.1% (32 teeth) in condition (2), 80.0% (36 teeth) in condition (3). No statistically significant differences were recorded between the different groups (P>0.05).
Conclusions: Within the limitations of the present study, it can be concluded that EWL is not influenced by the presence of cell phone or wireless router.