A computational method for recording and analysis of mandibular movements

Area of Science:

• Biomedical Engineering
• Clinical Biomechanics
• Dental Diagnostics

Background:

• Accurate quantification of mandibular movements is crucial for evaluating temporomandibular joint (TMJ) function and masticatory muscles.
• Existing commercial systems for measuring jaw movements can be expensive and complex.
• There is a need for cost-effective, user-friendly tools for practical clinical settings.

Purpose of the Study:

• To develop and validate a novel, low-cost clinical tool for quantifying mandibular movements.
• To assess the feasibility of using a video camera and computer program for trajectory reconstruction of jaw motion.
• To provide a flexible and non-invasive method for evaluating temporomandibular function.

Main Methods:

• Development of a system utilizing a standard video camera and specialized computer software.
• Implementation of a reflective marker attached to the mandible for trajectory tracking.
• Conducting a clinical experiment involving the measurement of mandibular opening-closing, protrusion, and laterotrusion in 12 subjects.

Main Results:

• The developed tool successfully quantified mandibular movements, including opening-closing, protrusion, and laterotrusion.
• Results obtained were consistent with established literature values for these movements.
• The system demonstrated a low cost, simplicity, and non-invasive nature.

Conclusions:

• The proposed clinical tool offers a viable, affordable alternative for quantifying mandibular kinematics.
• This system is suitable for practical clinical applications requiring flexible and non-invasive temporomandibular function assessment.
• The technology facilitates accurate evaluation of jaw movements, aiding in diagnosis and treatment planning.