Avaliação tridimensional das alterações maxilomandibulares após expansão rápida de maxila assistida cirurgicamente

Detalhes bibliográficos
Ano de defesa: 2014
Autor(a) principal: Oliveira, Talles Fernando Medeiros de [UNESP]
Orientador(a): Não Informado pela instituição
Banca de defesa: Não Informado pela instituição
Tipo de documento: Dissertação
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Universidade Estadual Paulista (Unesp)
Programa de Pós-Graduação: Não Informado pela instituição
Departamento: Não Informado pela instituição
País: Não Informado pela instituição
Palavras-chave em Português:
Link de acesso: http://hdl.handle.net/11449/127620
Resumo: Surgically assisted rapid maxillary expansion (SARME) is an effective treatment for maxillary transverse deficiency in adult patients. This study assessed the influence of two different osteotomy designs of the maxillary lateral wall on maxillary transverse changes, mandibular positioning and condyle fossa relationship after SARME. Thirty adult patients were divided into two groups according to the lateral osteotomy design: Group 1 (n = 16) underwent lateral osteotomy performed in a horizontal straight fashion and Group 2 (n = 14) underwent lateral osteotomy performed parallel to the occlusal plane with a step at the zygomatic buttress. Cone beam computed tomography scans were obtained before surgery (T1), immediately after expansion (T2) and six months after expansion (T3). The lateral osteotomy design had no bearing on the maxillomandibular changes after SARME. Both groups showed an increase in maxillary transverse measurements and clockwise rotation with lateral displacement of the mandible immediately after expansion. Maxillary changes showed to be stable six months after SARME, except for nasal floor width and tooth tipping which decreased at T3. Mandibular displacements tended to return close to their initial values at T3. No significant changes in condyle fossa relationship were observed at any time points. The design of lateral osteotomy of the maxilla did not affect the outcomes of SARME, which occurred by tipping of maxillary segments. Clockwise rotation and lateral displacement of the mandible are transient effects of SARME.