Modjaw® device: Analysis of mandibular kinematics recorded for a group of asymptomatic subjects

ABSTRACT

Objective

To assess the repeatability and kinematic data of Modjaw® recordings from a group of asymptomatic patients.

Methods

Modjaw® mandibular kinematic data were recorded for 22 asymptomatic volunteers (DC/TMD questionnaire). Sagittal (SCI at 3 and 5 mm) and transversal (TCI at 4 mm) condylar inclination values of the instantaneous center of rotation were measured over two recording sessions. The repeatability of recordings was determined from the intraclass correlation coefficient (ICC), which is based on a one-way random-effects ANOVA.

Results

The repeatability of recordings was found to be good to excellent. The mean TCI in mediotrusion was 7.1° ± 5.1, and the mean SCI in protrusion was 51.07° ± 9.43.

Conclusion

The Modjaw® device reliably records the patient’s real hinge axis kinematics during functional mandibular movements. Data can be transferred with the patient’s personal reference plane and digital casts to the CAD/CAM software.

KEYWORDS:

• Condylar inclination
• Bennett angle
• temporomandibular joint
• mandibular kinematics

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

The authors reported there is no funding associated with the work featured in this article.