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"True normal" TMD control subjects: a rare clinical finding

D T Brown, L K Cox, A A Hafez

    Cranio : the Journal of Craniomandibular Practice
    |August 26, 1998
    PubMed
    Summary

    Diagnosing temporomandibular joint dysfunction (TMD) is challenging. Combining clinical evaluation with computerized joint vibration analysis revealed subclinical TMD signs in most asymptomatic individuals, making "true normal" subjects rare.

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    Area of Science:

    • Dentistry
    • Orthodontics
    • Neurology

    Background:

    • Temporomandibular joint dysfunction (TMD) diagnosis relies on clinical evaluation and patient history.
    • Accurate diagnosis is crucial for effective treatment and understanding disease prevalence.
    • Identifying truly asymptomatic individuals for control groups is difficult in TMD research.

    Purpose of the Study:

    • To evaluate the diagnostic accuracy of clinical TMD assessments.
    • To compare the effectiveness of clinical methods versus combined methods including computerized joint vibration analysis.
    • To determine the prevalence of subclinical TMD signs in an asymptomatic population.

    Main Methods:

    • Clinical examination and history questionnaire were used for TMD assessment.

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  • Computerized joint vibration analysis was employed as an additional diagnostic tool.
  • Comparison of diagnostic accuracy between methods in symptomatic and asymptomatic groups.

    • Main Results:

    • Clinical examination and history alone showed limited accuracy in asymptomatic subjects.
    • Combining clinical evaluation with computerized joint vibration analysis improved diagnostic capability.
    • A significant number of 'asymptomatic' volunteers exhibited subclinical signs of TMD when assessed comprehensively.
    • Few 'true normal' subjects were identified using the combined diagnostic approach.

    Conclusions:

    • Standard clinical TMD diagnostic methods may overestimate the absence of dysfunction in control groups.
    • Computerized joint vibration analysis is a valuable adjunct for detecting subtle TMD indicators.
    • The prevalence of subclinical TMD may be higher than previously recognized.
    • Larger sample sizes are required to identify truly asymptomatic individuals for research purposes.