Proposição de novo método tridimensional para avaliação volumétrica da cabeça mandibular e espaço da articulação temporomandibular e obtenção da largura da cabeça mandibular

• Autor(a) principal: Cruz, Giuseppe Valduga
• Data de Publicação: 2020
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Repositório do Centro Universitário Braz Cubas
• Texto Completo: https://repositorio.cruzeirodosul.edu.br/handle/123456789/2188
• topic: Odontologia; Articulação temporomandibular; Tomografia computadorizada multidetectores; CNPQ::CIENCIAS DA SAUDE::ODONTOLOGIA

This study was carried out to develop a method to access the mandibular head width (MHW), the mandibular head volume (MHV), and the temporomandibular joint space volume (TMJSV) in exams performed by cone-beam computed tomography (CBCT). Also, an analysis of these measures was performed concerning the (right and left) sides of the temporomandibular joint and about sex. Measurements were performed on 50 CT scans of adult Class I individuals, with a mean age of 35.38 (± 12.93) years, 25 men and 25 women. A spherical design tool was used to obtain the MHW, whose diameter was adjusted to points at the mandibular head's medial and lateral poles. Its lower extremity was used as a reference for segmenting the mandibular head and obtaining MHV. To obtain the TMJSV, a standardized conic object, in STL format, with a volume of 8,375.92 mm³, was incorporated into the ATM region and, through Boolean subtraction with the temporal bone and mandibular head, the TMJSV was generated. The data obtained were submitted to statistical analysis with a significance level of 0.05. The MHW, MHV, and TMJSV averages were, for the left and right sides, respectively: 19.47 and 19.46 mm, 1401.39 and 1431.51 mm³, and 461.13 mm³ and 475.51 mm³. There was no statistically significant difference when comparing individuals' left and right measurements (p> 0.05). When evaluating MHW, MHV, and TMJSV with sex, it was found that women had lower values than men (p <0.05). It was observed that the measures evaluated are positively correlated with each other (p <0.05). It is concluded that the proposed new method can be useful for the evaluated three-dimensional measurements and that the measurements obtained were smaller for women.