Related Experiment Videos
Bilateral condylar movement patterns in adult subjects
C R Kenworthy1, R B Morrish, C Mohn
1Department of Restorative Dentistry, School of Dentistry, University of California, San Francisco 94143, USA.
Journal of Orofacial Pain
|July 10, 1998
Summary
Temporomandibular joint (TMJ) disorders often involve asymmetric condylar movements. While most symptomatic TMJ disorder patients exhibit asymmetry, asymptomatic individuals can also show these patterns, indicating movement alone isn't diagnostic.
Area of Science:
- Dentistry
- Biomechanics
- Orthodontics
Background:
- Temporomandibular joint (TMJ) disorders are common conditions affecting jaw function.
- Understanding condylar movement patterns is crucial for diagnosing TMJ disorders.
- Previous research has explored the relationship between TMJ symptoms and condylar kinematics.
Purpose of the Study:
- To investigate differences in temporomandibular condylar movement patterns between symptomatic and asymptomatic adult populations.
- To assess the diagnostic value of condylar movement analysis in identifying TMJ disorders.
- To compare self-reported symptoms with clinical evaluations for TMJ disorder classification.
Main Methods:
- Thirty-five adult volunteers were assessed using questionnaires and clinical examinations for TMJ disorder signs and symptoms.
- Participants were categorized into clinically symptomatic/asymptomatic and reported symptomatic/asymptomatic groups.
- Mandibular border condylar movements were measured bilaterally using a sagittal recording device during opening and excursions.
Main Results:
- 63% of clinically asymptomatic individuals demonstrated asymmetric condylar movements.
- 100% of clinically symptomatic individuals (n=5) exhibited asymmetric condylar movements.
- Asymmetric condylar movements were prevalent in both symptomatic and asymptomatic groups, though universally present in symptomatic cases.
Conclusions:
- Asymmetric condylar movements are highly characteristic of temporomandibular joint (TMJ) disorders but not exclusively indicative of them.
- Condylar movement patterns alone may not be sufficient for diagnosing TMJ disorders.
- Sagittal recording devices can identify abnormal condylar movements, aiding clinicians in TMJ disorder assessment.