OBJECTIVES: Correct determination of working length is an important step for success of endodontic therapy. Conventional radiography has limitations in providing the accurate location of apical foramen. For this reason, electronic apex locators (EALs) were developed to shorten the treatment time and decrease the radiation dose. The aim of this study was to evaluate the accuracy of Root ZX EAL for working length determination in primary @entity1347 . MATERIALS AND METHODS: In this in-vitro study, 50 extracted primary @entity1347 with root resorption were selected with no obstructed canals or history of previous root canal therapy. Working lengths were measured by direct observation of @entity3656 ( @entity3656 ), radiography and Root ZX EAL. A variation of   0.5 mm from the @entity3656 was considered acceptable. The results were analyzed statistically using paired t-test and interclass correlation coefficient (ICC) at 0.05 level of significance. RESULTS: Considering an acceptable 0.5 mm margin from @entity3656 (direct measurement), the accuracy of Root ZX EAL and radiography was found to be 86% and 76%, respectively. Absolute value of error from @entity3656 was significantly lower for ZX compared to radiography (P<0.001). Interclass correlation comparing both radiography and Root ZX with @entity3656 showed strong correlations. CONCLUSION: Root ZX EAL can be used as a reliable tool for obtaining root canal length in primary @entity1347 with resorption.

Accuracy of an Electronic Apex Locator for Working Length Determination in Primary XXXX .

@entity3656 :: ('MESH:D007870', 'Disease') :: ['AL', 'actual length'] @entity1347 :: ('MESH:C537775', 'Disease') :: ['anterior teeth']
@entity1347 :: (MESH:C537775,Disease) :: ['Anterior Teeth']
