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Related Experiment Videos

Horizontal condylar path in patients with disk displacement with reduction

K Fushima1, S Sato, Y Suzuki

  • 1Department of Orthodontics, Kanagawa Dental College, Yokosuka, Japan.

Cranio : the Journal of Craniomandibular Practice
|April 1, 1994
PubMed
Summary

Computerized axiography revealed 15 types of horizontal condylar paths in patients with disk displacement with reduction. Specific side-to-side deviations were common, but clear links to symptoms or disk displacement patterns were limited.

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Area of Science:

  • Temporomandibular joint (TMJ) disorders research
  • Biomechanical analysis of jaw movements
  • Diagnostic imaging in dentistry

Background:

  • Disk displacement with reduction is a common temporomandibular joint (TMJ) disorder.
  • Understanding condylar path variations is crucial for diagnosing and managing TMJ dysfunction.
  • Computerized axiography offers a quantitative method to analyze mandibular kinematics.

Purpose of the Study:

  • To analyze the horizontal condylar path during mandibular opening and closing in patients with disk displacement with reduction.
  • To investigate the relationship between condylar path types and clinical symptoms.
  • To explore correlations between condylar path characteristics, contralateral joint behavior, and disk displacement patterns.

Main Methods:

Related Experiment Videos

  • Utilized computerized axiography to record horizontal condylar tracings in 32 patients.
  • Classified condylar paths during opening into 15 distinct types.
  • Correlated axiographic findings with clinical symptoms and magnetic resonance imaging (MRI) assessed disk displacement patterns.

    • Main Results:

    • Identified 15 types of horizontal condylar tracings during mandibular opening.
    • No clear correlation was found between condylar path types and subjective clinical symptoms.
    • A specific correspondence in tracing types between the right and left TMJs was observed.
    • Medial deviation of one condyle and lateral deviation of the contralateral condyle occurred in 21 of 32 patients at maximum opening.
    • A straight condylar path from maximum opening to pre-click position was noted in most patients with medio-lateral deviation.
    • Some condylar path types showed a relationship with disk displacement patterns identified via MRI.

    Conclusions:

    • Horizontal condylar path analysis using axiography reveals diverse patterns in disk displacement with reduction.
    • While specific deviations and side-to-side correspondences exist, direct links to clinical symptoms are not consistently found.
    • The relationship between condylar path morphology and underlying disk displacement requires further investigation.