Comparative analysis ex vivo of the accuracy of three apex locators: Root ZX, Bingo 1020 and Ipex
Journal Title: RSBO - Year 2009, Vol 6, Issue 1
Abstract
Introduction and objective: The objective of this study was to evaluate ex vivo the reading accuracy of three electronic apex locators – Root ZX, Bingo 1020 and Ipex –, in respect to the real measure of the teeth.Material and methods: Fifty single root premolar teeth extracted were selected. After coronary access, the length tooth (LT) measurement was directly realized by the insertion of a K#10 file in the canal until its tip was observed in the apical foramen with the help of a magnifying glass (8X). After removing the file, its length was recorded with accuracy of 0.01 mm using digital caliper. Then, the teeth were electronically measured (LE) whit the three apex locators until achieving the zero mark on the display of each unit. The electronically measures obtained were compared with the LT and the differences were analyzed by the Kruskal-Wallis Test and by the test of proportions (α = 0.05). Results:It was found that the Root ZX system was statistically different from the Ipex (p < 0.01),and the Bingo system presented intermediary result,showing to be statistically similar to the Root ZX and Ipex systems (p > 0.05).Within the limit of tolerance of ± 1.0 mm, the results demonstrated an accuracy of 100% for ZX Root, 94% for Bingo and 90% for Ipex when compared to the LT values. However,in the limits of ± 0.5 mm the accuracy achieved was 90% for Root ZX, 68% for Bingo and 52% for the Ipex.Conclusion: It was concluded that all electronic devices tested were able in determining the precise tooth length when considered a variation of 1 mm from the position of apical foramen. Nevertheless,when considered a variation of 0.5 mm, only the unit Root ZX proved to be accurate.
Authors and Affiliations
Roberta HEIDEMANN, Felipe VAILATI, Cleonice TEIXEIRA, César OLIVEIRA, Braulio PASTERNAK JUNIOR
Keywords
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