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Temporomandibular joint vibration in bruxers
Xueling Li1, Xuefeng Lin, Yan Wang
1Department of Prosthodontics, Affiliated Hospital of Stomatology, Sun Yat-Sen University, China.
Cranio : the Journal of Craniomandibular Practice
|August 25, 2009
Summary
Bruxism, or teeth grinding, can cause abnormal temporomandibular joint (TMJ) vibrations. Moderate to severe bruxers exhibit significantly higher vibratory energy and amplitude, indicating TMJ dysfunction.
Area of Science:
- Dentistry
- Biomechanics
- Medical Engineering
Background:
- Temporomandibular joint (TMJ) vibration is a key indicator of joint dysfunction and pathology.
- Bruxism is a common condition involving teeth grinding and clenching, often associated with temporomandibular disorders (TMDs).
Purpose of the Study:
- To investigate the association between bruxism and temporomandibular joint (TMJ) vibrations.
- To compare joint vibration characteristics in individuals with and without bruxism.
- To evaluate the impact of bruxism severity on TMJ vibration patterns.
Main Methods:
- Bilateral TMJ vibrations were recorded using a specialized detecting instrument.
- Jaw tracking was employed during rhythmic jaw opening and closing movements.
- Participants included 24 individuals with bruxism and 16 asymptomatic controls.
Main Results:
- The vibratory energy and amplitude were significantly higher in moderate to severe bruxers compared to mild bruxers and asymptomatic subjects.
- Joint vibration occurred in 75.0% of asymptomatic subjects, 77.8% of mild bruxers, and 100% of moderate to severe bruxers.
- A positive correlation was observed between the degree of bruxism and the intensity of abnormal joint vibrations.
Conclusions:
- Bruxism can induce abnormal joint vibrations in the temporomandibular joint (TMJ).
- The severity of bruxism correlates with increased vibratory energy and amplitude, suggesting a direct impact on TMJ health.
- TMJ vibration analysis may serve as a valuable diagnostic tool for assessing bruxism-related temporomandibular disorders.
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