Relações anatomotopográficas entre raízes e lesões periapicais de dentes superiores posteriores com o seio maxilar

• Autor(a) principal: Nunes, Carla Aparecida Bernardes da Costa Meneses
• Data de Publicação: 2014
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UFG
• Texto Completo: http://repositorio.bc.ufg.br/tede/handle/tede/12833
• topic: Seio maxilar; Anatomia; Tomografia computadorizada de feixe cônico; Anatomy; Maxillary sinus; Cone beam computed tomography; CIENCIAS DA SAUDE::SAUDE COLETIVA

Purpose: To analyze the topographical anatomic relationship between the maxillary posterior teeth and the maxillary sinus (MS) using cone beam computed tomography (CBCT). Methods: A sample of 202 CBCT examinations, consisting of 600 premolars and 600 molars were selected for the study images. The distance between the root apex and the floor of the MS as well as the thickness of the cortical bone of the floor of the MS in closer to root apex and furcation region was measured. The vertical and horizontal relationships of the MS floor with the roots of the molars were classified according to Kwak et al. (2004) with adaptation. The mean and standard deviation of distances and thicknesses were obtained. The difference between the distances, as well as between cortical thicknesses was evaluated by Kruskal-Wallis test. The difference between the types of the vertical relationship, as well as between the types of the horizontal relationship, of the molars was assessed by Chi-square test. Significant values were considered p < 0.05. Results: The shortest distance between the apex and the MS floor was observed in MB root of the second molar (0.36 ± 1.17 mm) and the longest distance in V root of the first premolar (5.47 ± 4.43 mm). In the group of single-rooted premolar, the closest distance between the apex and the MS floor was observed in the roots of the second premolar (1.71 ± 2.81 mm). The greater cortical thickness of the floor of the MS was observed in the first premolar area (1.28 ± 0. 42 mm) and the lower, in the second molar área (0.65± 0.41 mm). There was no statistically significant difference in the thickness of cortical bone in relation to proximity to the apex of the MB, DB and P roots of the molars. The vertical relationship most observed in the molars was Type 2 and the horizontal was type 2H. Conclusions: The roots of the upper molars showed greater proximity to SM when compared to premolar; the thickness of the cortical bone of the floor of the SM in the region closest to the apex and furcation area was found to be similar; the roots of the upper molars presented more frequently a vertical and horizontal relationship of proximity with the SM.