Study on Lateral Pterygoid Muscle Attachment Type is Related to the Pathogenesis of Anterior Disc Displacement, Disc Degeneration and Articular Surface Degeneration: A Magnetic Resonance Imaging Assessment | Chapter 02 | Issues and Developments in Medicine and Medical Research Vol. 8

 The goal of this study was to see if there was a link between the attachment type of the lateral pterygoid muscle (LPM) and anterior disc displacement (ADD), disc degeneration, or articular surface degeneration in the Central Indian population.

Patients who complained of pain, clicking, or locking in the Temporomandibular Joint (TMJ) were assessed. Normal disc position, ADD with reduction, and ADD without reduction were used to classify TMJ dysfunctions. Three different forms of LPM attachments to the condyle disc complex were identified. R 3.2.0 was used to conduct the statistical analysis. The relationship between TMJ dysfunction and LPM attachment types to the disc condyle complex, disc degeneration, and articular surface degeneration was investigated using statistical correlation analysis.

Results: Of the 108 TMJs in 54 patients (42 men and 66 females, mean age 32.20 years), 25 TMJs (23.14%) were found to be normal in terms of disc condition, 61 TMJs (56.48 percent) had an ADD with reduction, and 22 (20.37 percent) had an ADD without reduction. Arthritis was found in 104 TMJs (96.30%), indicating a significant frequency of TMJ osteoarthritis (96.3%) among young individuals (mean age 32.2 years). Type I (87.03 percent), Type II (11.11%), and Type III (11.11 percent) were the LPM attachment types to the disc condyle complex (1.85 percent ). The type of LPM attachment and ADD were found to have a statistically significant difference (P value 0.0285). There was no statistically significant link between LPM attachment type and disc or articular surface deterioration.

Conclusion: The kind of LPM attachment is linked to the pathophysiology of ADD, but not to disc or articular surface degeneration. It is inferred that the kind of attachment of the lateral pterygoid muscle is linked to the pathophysiology of anterior disc displacement and, as a result, to the internal derangement of TMJ diseases.

Author(S) Details

Vijaya Rajesh Kamble
Department of Radiodiagnosis, NKP Salve Institute of Medical Sciences and Research Centre, India.

Kajal R. Mitra
Department of Radiodiagnosis, NKP Salve Institute of Medical Sciences and Research Centre, India.

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