2009 Volume 1 Issue 2 Pages 195-198
Patient: The patient was 40 years old woman with chief complaint by intermittent jaw lock with severe pain. CT and MRI examination showed disc displacement without reduction on both sides and a typical osteoarthrosis of head of mandible, but the mobility of condyles was good. Neurology examination did not show the disorder, but in electromyogram, left side masseter and temporal muscle showed involuntary muscle activity more than 3 times of MVC. It was diagnosed as jaw lock by the hemimasticatory spasm. A prosthetic therapy using the overlay removable partial denture succeeded and was able to control it for masticatory spasm well for 10 years.
Discussion: It contributed to dramatic decrease of the masticatory spasm onset that occlusal vertical dimension of the overlay removable partial denture decided EMG examination in reference.
Conclusion: The overlay removable partial denture contributed to control of masticatory spasm and recovery of a chewing function.
