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Association between craniomandibular disorders and occlusal interferences.
P Kirveskari1, P Alanen, T Jämsä
1University of Turku, Institute of Dentistry, Finland.
The Journal of Prosthetic Dentistry
|July 1, 1989
Summary
This study investigated craniomandibular disorders by manipulating occlusal interferences. Findings suggest that the number of occlusal interferences significantly correlates with these disorders, impacting etiological models.
Area of Science:
- Dental Science
- Biomedical Research
Background:
- Craniomandibular disorders (CMD) lack a universally accepted etiological theoretical model.
- Previous research often employs cross-sectional studies, potentially limiting causal inference.
Purpose of the Study:
- To explore the relationship between occlusal interferences and the signs of craniomandibular disorders.
- To investigate the impact of study design on understanding CMD etiology.
Main Methods:
- A 3-year double-blind study with a treatment group (n=53) that had occlusal interferences annually eliminated and a control group (n=46) receiving placebo treatment.
- Cross-sectional analysis conducted in the third year.
Main Results:
- A significant association was found between the number of occlusal interferences and the presence of craniomandibular disorder signs.
- The study design effectively manipulated the variation in occlusal interferences.
Conclusions:
- The number of occlusal interferences is a significant factor associated with craniomandibular disorders.
- The absence of interference-free subjects in non-selected samples may explain previous null findings in CMD research.