Presença de canais mesio mediais em primeiros molares inferiores: um estudo tomográfico

Abstract

Recognizing variations in the anatomy of the root canal is essential for a successful diagnosis and successful endodontic treatment. The objective of this study was to identify the incidence of the middle mesial canal in the lower first molars, through Cone Beam Computed Tomography. The sample consisted of 200 tomographic examinations of lower first molars used from the tomographic image file of aradiology clinic in the city of Itabuna-BA. No patient was submitted to the examination for the purpose of research. CT scans were purchased on the i-Cat Classic ® device (Imaging Science International, Hatfield, Pennsylvania, United States of America) with voxel between 0.4-0.2 mm, and image acquisition and analysis were formed using XoranCat software , version 3.0.34 (Xoran Technolo-gies, Ann Arbor, MI). The identification of the middle mesial canal, as well as its location and union with adjacent canal, was determined by multiplanar reformatting (MPR) in axial reconstruction. All analyzes were performed in the R Core Team program (2018), with a significance level of 5%. The prevalence of patients with middle mesial canal in lower first molars was 8.0% (16 molars), with no significant association between the presence of anatomical variation with sex and age. Of the 16 molars, five (31.2%) were mesialized, nine (56.3%) centralized and two (12.5%) were distalized. In addition, 68.8% had union of the root thirds. Therefore, It can be concluded then that the study of the presence of the middle mesial canal, in populations from different locations, is extremely important to assist the dentistry in the diagnosis and planning of the success of the endodontic treatment. This study was carried out in the city of Itabuna-BA and showed a low prevalence of the medial mesial canal in the evaluated population, with no significant association between the presence of anatomical variation with sex and age.