下顎偏心位での咬合接触状態と切歯路, 顆路, 咀嚼筋活動について

概要

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Occlusal contact must be in harmony with tempororrrandibular joint movement and musticatory muscle activity for healhy stomatognathic functions. Using normal subjects with healhy stomatognathic functions and occlusions, the following were measured at eccentric positions : occlusal contacts, inclination of incisal path and condylar path, EMG activities when subjects performed maximal clenching. And reductions of EMG activities when artificial canine guidance fitted for subjects were also measured. The following results were obtained : 1. Inclination of lateral incisal path which projected on the sagital plane were different according to difference of the occlusal contacts. 2. There was no difference in inclination of lateral incisal path which projected on the horizontal plane and lateral condylar path according to difference of the occlusal contacts. 3. Different co-ordination patterns of the EMG activities were observed according to difference of the occlusal contacts, when subjects performed maximal clenching at lateral eccentric positions 4. The co-ordination patterns did not change much even after the artificial canine guidance was fitted. 5. These findings suggest that maximal clenching at lateral eccentric position might help us to dicide the anterior guidance.
社団法人日本補綴歯科学会の論文
1991-08-01