Relationship between the masticatory jaw movement and the occlusal contact area, the maximum occlusal force and the alveolar bone mineral content at the mandibular first molar region : Study with the unilateral mastication

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  • 咀嚼時の顎運動と下顎第一大臼歯部の咬合接触面積, 最大咬合力および歯槽骨骨塩量との関連 : 偏咀嚼者からの検討

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Abstract

The purpose of this study was to investigate the relationship between the masticatory jaw movement and the occlusal contact area, the maximum occlusal force and the alveolar bone mineral content (BMC) at the mandibular first molar region in 23 male students with unilateral mastication. 1. The number of chewing cycles, the occluding time, the maximum lateral distance of the chewing path (LDCP), were significantly larger in the preferred chewing side than in the opposite side. In the preferred chewing side, the number of chewing cycles showed significant positives correlations with the occluding time as well as the LDCP. Significant positives correlations were also detected among the opening, closing, occluding time. 2. The occlusal contact area, the maximum occlusal force and the alveolar BMC were significantly higher in the preferred chewing side than in the opposite side. In the preferred chewing side, significant positives correlations were detected among the occlusal contact area, the maximum occlusal force and the alveolar BMC. 3. In the preferred chewing side, the number of chewing cycles correlated significantly with the occlusal contact area, the maximum occlusal force and the alveolar BMC. The maximum vertical distance of the chewing path and the LDCP correlated significantly with the occlusal contact area. In conclusion, the number of chewing cycles is closely related to the occlusal contact area, the maximum occlusal force and the BMC at the mandibular first molar region.

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