# Temporomandibular Joint Dislocation in Patients With Parkinsonism: A Report of Two Cases

## TL;DR

This paper reports two cases of jaw joint dislocation in advanced Parkinsonism patients, suggesting a possible link to muscle rigidity and the need for better management strategies.

## Contribution

The paper highlights TMJ dislocation as an underrecognized complication in Parkinsonism and emphasizes the need for proactive management.

## Key findings

- TMJ dislocations occurred in two advanced Parkinsonism patients during wide mouth opening events.
- Manual reduction was challenging due to increased muscle tone in both cases.
- The cases suggest a possible link between Parkinsonism symptoms and TMJ dysfunction.

## Abstract

This report presents two cases of temporomandibular joint (TMJ) dislocation in patients with L-dopa-responsive Parkinsonism, highlighting an underrecognized complication of the disease. Both patients, classified as Hoehn-Yahr stage IV, exhibited typical Parkinsonism symptoms, such as tremors, rigidity, and gait disturbances. TMJ dislocations occurred in both patients during events involving wide mouth opening, one during breakfast and the other while yawning. The underlying pathophysiology remains unclear but may be related to Parkinsonism-associated muscle rigidity or involuntary orofacial movements. Manual reduction was performed in both cases, though difficulties were encountered due to increased muscle tone. These cases underscore the importance of early recognition and proactive management of TMJ dysfunction in Parkinsonism patients, especially in cases of advanced disease. Future studies should explore preventative strategies and optimal management techniques to improve patient outcomes. Accumulating data from similar cases will be essential for developing more effective management strategies for TMJ dysfunction in patients with Parkinsonism.