Resumo

MELO, Tiago André Fontoura de et al. Analysis of the influence of degree of curvature in the occurrence of apical deviations after the oscillatory preparation in simulated root canals. RSBO (Online) [online]. 2010, vol.7, n.3, pp. 312-319. ISSN 1984-5685.

INTRODUCTION AND OBJECTIVE: This study aims to analyze the influence of degree of curvature in the occurrence of apical deviations after the oscillatory preparation. MATERIAL E METHODS: Twenty simulated root canals of 21 mm in length were divided into two experimental groups according to the degree of curvature: 20º and 40º. The canals were prepared using stainless steel instruments connected to a 10:1 speed reducing contra-angle handpiece with an automatized system of oscillatory movement. When analyzing the deviation, canals were filled with India ink and photographed in a standardized way with the aid of a platform, before and after the accomplishment of the preparation. In sequence, the images obtained were manipulated in Photoshop^® Adobe program, preoperative and postoperative images were overlapped, and the deviation was measured with a ruler within 1 mm of working length and in the halfway of curvature. Data were submitted to analysis of variance (Anova) with a significance level of 5%. RESULTS AND CONCLUSION: Through the results obtained, it was possible to see that the greater the degree of curvature, the greater the deviation. In relation to the place of analysis, it was possible to realize that there was more deviation in the region of 1 mm of working length than in the halfway of curvature.

Palavras-chave : Endodontics; root canal preparation; stainless steel.