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Title: Magnetic resonance imaging evaluation of discal attachment of superior head of lateral pterygoid muscle in individuals with symptomatic temporomandibular joint. Author: Omami G, Lurie A. Journal: Oral Surg Oral Med Oral Pathol Oral Radiol; 2012 Nov; 114(5):650-7. PubMed ID: 23021920. Abstract: OBJECTIVE: There has been much speculation on the role of the lateral pterygoid muscle (LPM) in temporomandibular joint (TMJ) internal derangement. As a result, this muscle has been the focus of many reports attempting to understand its possible role in TMJ internal derangement. STUDY DESIGN: Magnetic resonance (MR) imaging exams of 108 TMJ disorder patients were assessed for types of morphologic insertion of the superior head of LPM to the condyle-disc complex and possible correlation with disc position. The investigation was made on the sagittal T1-weighted MR images in closed- and open-mouth positions. RESULTS: There was a lack of correlation between attachment pattern of the superior head of LPM and presence or absence of anterior disc displacement. CONCLUSIONS: The explanation of anterior disc displacement based on the attachment type of the superior head of LPM is unlikely; the type of muscular insertion does not appear to have a predictive or prognostic value for TMJ internal derangement.[Abstract] [Full Text] [Related] [New Search]