Morfologia de interesse para a osteotomia sagital do ramo mandibular nas diferentes dimensões faciais verticais: análise em tomografia computadorizada de feixe cônico

• Autor(a) principal: Wegner, Éverton Adriano
• Data de Publicação: 2019
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional PUCRS
• Texto Completo: http://hdl.handle.net/10923/15929
• topic: MANDÍBULA; TOMOGRAFIA COMPUTADORIZADA

The aim of this study was to analyze the position of the inferior alveolar vasculo-nervous bundle at different anatomical points in the area of interest for the sagittal split ramus osteotomy of the mandible and describe possible variations in bone thickness in patients with different vertical facial dimensions using cone beam computed tomography (CBCT). Tomographic exams of 60 hemimandibles were analyzed after classification of the vertical facial dimension with lateral telerradiography of face, in three groups: Mesofacial (G1), Brachyfacial (G2) and Dolichofacial (G3). Were performed seven cuts in the mandibular tomography, in each cut the distances between the mandibular canal (MC) and the bones surfaces were evaluated. The exams were analyzed with Dolphin® Imaging 3D software. The statistical analysis was performed using the ANOVA and the Tukey's test, with level of significance of P < 0.05. The G3 presented greater distance from the MC to the superior bone surface of the region of foramen mental to the distal region of the second lower molar. The G2 presented greater distance from the MC to the buccal bone surface of the region between second premolar and first molar to distal second molar. In region of the mental foramen, the distance between the center of the foramen and the lingual bone surface was higher in G2, being statistically larger than G3. In the mandibular ramus region, the distance between the mandibular foramen center and the mandible base was significantly greater in G2. It was concluded that the greatest distance between MC and vestibular bone surface for the three groups studied was in the lower second molar region. Brachyfacial patients present greater distance between the buccal bone surface and the MC in the region of premolars and molars. Dolichofacials present greater distance between the superior bone surface and the MC of the region of mental foramen to the distal of the second molar, and smaller distance between the mandibular foramen and the base of the mandible.