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Comparative study using video analysis and an ultrasonic measurement system to quantify mandibular movement.
M Frisoli1, J M Edelhoff2, N Gersdorff2
1a Faculty of Engineering, Biomechanics Laboratory , National University of Entre Ríos , Oro Verde , Argentina.
Cranio : the Journal of Craniomandibular Practice
|April 15, 2016
Summary
Two-dimensional videography is a reliable and cost-effective tool for measuring maximum mandibular opening, aiding in the detection of temporomandibular disorders. While accurate for opening, it may overestimate laterotrusion movements.
Area of Science:
- Biomedical Engineering
- Dental Biomechanics
- Clinical Diagnostics
Background:
- Accurate quantification of mandibular movements is crucial for diagnosing temporomandibular joint (TMJ) disorders.
- Traditional methods for assessing jaw motion include videography and electronic axiography.
- A direct comparison of these systems is needed to validate simpler techniques.
Purpose of the Study:
- To directly compare the accuracy of two-dimensional (2D) videography with electronic axiography for quantifying mandibular opening movements.
- To evaluate the reliability of 2D videography for assessing key parameters of jaw motion, including maximum opening and laterotrusion.
Main Methods:
- 32 healthy volunteers performed a standardized frontal Posselt movement.
- Mandibular movements were recorded and analyzed using both 2D videography and electronic axiography (reference system).
- Key parameters: maximum opening, right laterotrusion, and left laterotrusion were compared between systems.
Main Results:
- Frontal Posselt diagrams generated from both systems showed acceptably similar data.
- No significant difference was found between 2D videography and the reference system for maximum opening measurements (p=0.217).
- Laterotrusion measurements using 2D videography tended to be overestimated and showed greater variability compared to the reference.
Conclusions:
- 2D videography is a suitable, low-cost tool for screening, long-term observation, and quick checks of mandibular dysfunction, particularly for frontal plane trajectories.
- The reliability and acceptable quality of 2D videography data make it advantageous for dental office application, especially for maximum opening measurement in TMJ disorder detection.
