Metrical analysis of disc-condyle relation with different splint treatment positions in patients with TMJ disc displacement
Liu, Mu-Qing; Lei, Jie; Han, Jian-Hui; Yap, Adrian U-Jin; Fu, Kai-Yuan.
J. appl. oral sci
; 25(5): 483-489, Sept.-Oct. 2017. tab, graf
Artigo
em Inglês
| LILACS, BBO - odontologia (Brasil) | ID: biblio-893650
Abstract
Objective:
To evaluate the effect of bite positions characterizing different splint treatments (anterior repositioning and stabilization splints) on the disc-condyle relation in patients with TMJ disc displacement with reduction (DDwR), using magnetic resonance imaging (MRI). Material andMethods:
37 patients, with a mean age of 18.8±4.3 years (7 male and 30 females) and diagnosed with DDwR based on the RDC/TMD, were recruited. MRI metrical analysis of the spatial changes of the disc/condyle, as well as their relationships, was done in three positions maximum intercuspation (Position 1), anterior repositioning splint position (Position 2), and stabilization splint position (Position 3). Disc/condyle coordinate measurements and disc condyle angles were determined and compared.Results:
In Position 1, the average disc-condyle angle was 53.4° in the 60 joints with DDwR, while it was −13.3° with Position 2 and 30.1° with Position 3. The frequency of successful "disc recapture" with Position 2 was significantly higher (58/60, 96.7%) than Position 3 (20/60, 33.3%). In Positions 2 and 3, the condyle moved forward and downward while the disc moved backward. The movements were, however, more remarkable with Position 2.Conclusions:
Anterior repositioning of the mandible improves the spatial relationship between the disc and condyle in patients with DDwR. In addition to anterior and inferior movement of the condyle, transitory posterior movement of the disc also occurred.Assuntos
Humanos Masculino Feminino Criança Adolescente Adulto Adulto Jovem Placas Oclusais Disco da Articulação Temporomandibular/lesões Luxações Articulares/fisiopatologia Luxações Articulares/terapia Côndilo Mandibular/lesões Valores de Referência Imageamento por Ressonância Magnética Variações Dependentes do Observador Reprodutibilidade dos Testes Análise de Variância Resultado do Tratamento Disco da Articulação Temporomandibular/fisiopatologia Disco da Articulação Temporomandibular/diagnóstico por imagem Luxações Articulares/diagnóstico por imagem Desenho de Equipamento Incisivo/fisiopatologia Côndilo Mandibular/fisiopatologia Côndilo Mandibular/patologia Côndilo Mandibular/diagnóstico por imagem
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