Avaliação da topografia dos dentes posteriores e sua relação com o seio maxilar

Abstract

The odontogenic maxillary sinusitis is found in about 5% to 10% of cases of maxillary sinusitis. Some roots of upper posterior teeth may be too close together or invaginated into the maxillary sinus. In these cases can facilitate the development and perpetuation of chronic sinusitis, when associated with dental problems. Like this, one should always consider the anatomical relationship of the maxillary sinus with the dental roots in the diagnosis of pulp and periapical changes in endodontic treatment and surgical procedures. The objective of this study is to evaluate, from images obtained through computed tomography cone-beam, the close relationship between the root tips of upper posterior teeth, second premolar, first molar and second molar, with the sinus cortical jaw, buccal and palatal. For this, the distances between the root apexes and the cortical ones will be determined. The roots will be distributed into three groups. The measurements will be held from axial and coronal sections in i-CAT® Vision software, and will be classified into four three, G1- root apex in maxillary sinus, G2- apex até1mm the cortical bone of the maxillary sinus, G3- apex root more than 1 mm from the cortical bone of the maxillary sinus. It was observed that when increases the age, there is a greater proximity of the evaluated teeth regarding the maxillary cortical bone (p<0.05) and less proximity of 2M to MS (p=0.005). 207 molars (45.8%) had at least one of the roots within the MS. In the group G2, there was no difference between the evaluated teeth. In group G3, 2PM were more frequent (72%) than 1M and 2M. When increasing age, there is a greater proximity of the teeth to the maxillary cortical bone and a lesser proximity to the MS. The mesiobuccal root of the maxillary 2M is the closest root to the MS cortical, while the maxillary 1M is the closest tooth to the maxillary cortical bone.