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Systematic Assessment of Mammalian Skull Specimens for Dental and Temporomandibular Joint Pathology
Published on: August 22, 2022
Temporomandibular joint structural derangement and general joint hypermobility
Huey-Yuan Wang1, Tiffany Ting-Fang Shih, Juo-Song Wang
1Department of Dentistry, Mackay Medicine, Nursing and Management College, Taipei, Taiwan.
Journal of Orofacial Pain
|February 1, 2012
Summary
General joint hypermobility (GJH) is not a reliable indicator for temporomandibular joint (TMJ) disc displacement. The Beighton score did not differentiate between patients with and without TMJ internal derangement.
Area of Science:
- Orthopedics
- Radiology
- Rheumatology
Background:
- General joint hypermobility (GJH) is characterized by excessive joint range of motion.
- Temporomandibular joint (TMJ) internal derangement (ID) involves displacement of the TMJ disc.
- The relationship between GJH and TMJ ID requires further investigation.
Purpose of the Study:
- To investigate the association between GJH, assessed by the Beighton score, and TMJ disc displacement.
- To determine if GJH is a predictive factor for TMJ internal derangement.
Main Methods:
- Quantitative measurement of joint mobility (fifth finger extension, thumb apposition, elbow, knee, trunk, ankle).
- Assessment of GJH using the Beighton score in 66 female patients with MRI-evident TMJ ID and 30 controls.
- Statistical analysis including ANOVA and chi-square tests to evaluate associations.
Main Results:
- Few subjects met the criteria for GJH based on the Beighton score.
- The Beighton score did not significantly differentiate between TMJ ID patients and controls.
- TMJ ID patients, particularly those with disc displacement without reduction, showed reduced trunk mobility, though potentially not clinically significant.
Conclusions:
- General joint hypermobility, as measured by the Beighton score, is not a reliable indicator for TMJ internal derangement.
- Further research may be needed to explore other potential markers or relationships between joint laxity and TMJ disorders.
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