Assessment of condyle position, fossa morphology and disc displacement in symptomatic patients

Publication date: Available online 19 April 2017
Source:Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
Author(s): Katharina Alves Rabelo, Saulo Leonardo Sousa Melo, Marianna Guanaes Gomes Torres, Larissa Rangel Peixoto, Paulo Sérgio Flores Campos, Iêda Margarida Crusoé Rocha Rebello, Daniela Pita de Melo
ObjectiveTo determine whether associations exist between the morphology of the glenoid fossa, articular spaces and disc displacement by evaluating magnetic resonance imaging (MRI) of symptomatic patients. Sex and age were also evaluated for any effect on the parameters.Study DesignMRI scans of 199 temporomandibular joints were assessed for the morphology of the glenoid fossa and articular spaces in both sagittal and coronal views. The presence of disc displacement and its type in closed- and open-mouth positions were also assessed. ANOVA, Tukey and Student t-tests or Mann-Whitney rank sum tests were used to investigate associations between these variables.ResultsA total of 113 joints (56.8%) presented with disc displacement. The articular spaces in the sagittal and coronal views were overall significantly larger in males than females in three of the six spaces (superior, posterior, and central spaces). Larger superior and medial articular spaces were associated with angled glenoid fossae. Higher mean values of the articular space sizes were associated with normal disc position (p<0.001), except for the anterior articular space. When displacement was identified, higher values of the articular space sizes were also associated with disc reduction in open-mouth position (p<0.05).ConclusionCondyles in a central position in the coronal view and slightly anteriorly positioned in the sagittal view are less likely to present disc displacement.



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