Resumo

NAKATSUKA, André Akira; NABESHIMA, Cleber Keiti  e  BRITTO, Maria Letícia Borges. Odontometric reliability of Root ZX II. RGO, Rev. gaúch. odontol. (Online) [online]. 2012, vol.60, n.2, pp. 215-219. ISSN 1981-8637.

Objective This study analyzed the reliability of the electronic apex locator Root ZX II (J. Morita Corp., Kyoto, Japan) in different roots using the apical locator with the rotary unit. Methods The working length of the roots of twenty-two upper molars was established 0.5 mm short of the apex visually, using a ruler. The teeth were fixed on an support and shaped using the ProTaper rotary system with the Root ZX II (J. Morita Corp., Kyoto, Japan) device calibrated to 0.5 Ncm and 500 rpm. Next, an F3 gutta-percha cone was introduced in the root canal and assessed visually. The data of the different canals, that is, mesiobuccal, distobuccal and lingual, were treated by the Chi-square test. Results The Root ZX II (J. Morita Corp., Kyoto, Japan) device located the working length correctly 79% of the time and no differences were observed among the different root canals (p>0.05). Conclusion When the Root ZX II apex locator is used with your rotary unit (J. Morita Corp., Kyoto, Japan) device, the percentage of clinically acceptable measurements is good, and the position of the root canal did not affect the working length.

Palavras-chave : Endodontics.; Odontometry.; Root canal therapy.; Tooth apex..