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[Effects of muscular position splint on maxillomandibular realignment].

OBJECTIVE
To study the effects of muscular position splint on maxillomandibular realignment.


METHODS
The changes of occlusal impression on splint in 102 craniomandibular disorder (CMD) patients were recorded after wearing the splint 1 week, 2 weeks, 1 month, two to three or six months. If there appeared instability of occlusal impression when biting, the original impression was cleared and new soft resin was placed on its surface in order to get a new impression. The splint was always adjusted to fit well. When the signs and symptoms of CMD disappeared, the splint was worn off. Finally, whether the muscular contact position harmonized with the intercuspal position (ICP) or not was recorded.


RESULTS
There appeared two different conditions: 1. The original occlusal impression remained unchanged in 66 patients; 2. Being unfitted in 36 patients, occlusal analysis revealed that 12/102 patients had abnormal occlusion including premature anterior teeth contact (2 cases), natural defective vertical dimension (1 case) and deflected ICP (9 cases). These abnormal occlusion could not be determined before treatment.


CONCLUSION
The muscular position splint can correct the abnormal muscular position. On the premise that the muscular position is normal, the muscular position splint can be used to judge whether the ICP is normal.