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Relationship between systemic joint laxity, TMJ hypertranslation, and intra-articular disorders
P C Conti1, J E Miranda, C R Araujo
1Department of Prosthodontics, Bauru School of Dentistry, University of São Paulo, Brazil. pcconti@pcab.usp.br
Cranio : the Journal of Craniomandibular Practice
|February 24, 2001
Summary
General joint hypermobility did not correlate with temporomandibular joint (TMJ) intra-articular disorders in this study. Age showed a negative correlation with systemic hypermobility, but TMJ hypertranslation was not linked to systemic laxity.
Area of Science:
- Orthopedics
- Dentistry
- Rheumatology
Background:
- Temporomandibular joint (TMJ) disorders are common and can be associated with systemic joint hypermobility.
- Understanding the relationship between general joint laxity and TMJ-specific issues is crucial for diagnosis and treatment.
Purpose of the Study:
- To investigate the correlation between general joint hypermobility, TMJ hypertranslation, and intra-articular TMJ disorders.
- To determine if systemic joint laxity is a risk factor for symptomatic TMJ conditions.
Main Methods:
- A cohort of 120 individuals was divided into symptomatic (n=60) and nonsymptomatic (n=60) groups based on TMJ complaints.
- Systemic joint hypermobility was assessed using the Beighton's score.
- TMJ mobility, specifically condyle hypertranslation, was measured via lateral X-rays in closed and open mouth positions.
Main Results:
- No significant association was found between TMJ intra-articular disorders and systemic hypermobility (p > 0.05).
- A significant negative correlation was observed between age and systemic hypermobility (p < 0.05).
- No correlation was detected between systemic hypermobility and TMJ hypertranslation (p > 0.05).
Conclusions:
- Systemic joint hypermobility is not directly associated with intra-articular TMJ disorders or TMJ hypertranslation.
- Age is negatively correlated with systemic hypermobility.
- Further research may explore other factors contributing to TMJ disorders in hypermobile individuals.