Fundamental study of the relationship between the lateral mandibular position and the bulging of the temporal muscle region.
Greene proposed a temporal-muscle-gripping method to judge the suitability of the mandibular position by gripping the temporal muscle region. Ogiwara examined the relationship between the anteroposterior mandibular position and the bulging of the temporal muscle region. However, the relationship between the lateral mandibular position and the bulging of the temporal muscle region has not been clarified. In this study, the relationship between the lateral mandibular position and the bulging of the temporal muscle region was examined. Five dentulous subjects were required to occlude at the tapping point and laterally deviated mandibular positions from the tapping point. The bulging of the temporal muscle region was measured at each mandibular position. Results were as follows. The bulging of the temporal muscle region at occlusion was influenced by lateral deviations in the mandibular position. The bulging was larger and started earlier on the deviated side than on the opposite side. In the measurement of the starting time of bulging of the temporal muscle region, the value of the difference in the starting time of bulging between the right and the left side at more than 0.4 mm lateral deviated mandibular position was larger than the value of the difference in the starting time of bulging between the right and the left side at the tapping point in all five subjects (p < 0.05).
Miyauchi
Y
Y
Department of Complete Denture Prosthodontics, Tokyo Dental College, Chiba, Japan.
Mizokami
T
T
D000328:Adult; D005069:Evaluation Studies as Topic; D006801:Humans; D007574:Jaw Relation Record / Q000295:instrumentation / Q000379:methods*; D008297:Male; D008334:Mandible / Q000502:physiology*; D018709:Statistics, Nonparametric; D013703:Temporal Muscle / Q000502:physiology*