下顎片側遊離端義歯の片側性設計における維持装置の効果に関する研究第1報

概要

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The dispersion of occlusal forces around both the abutment teeth and the alveolar mucosa is generally considered as an most important principal in minimizing the denture mobility and the local over-load on designing the distal extention-type denture. This study was undertaken to investigate the princijval factors in designing uni-lateral-type clasp denture equipped with direct and indirect retainer.Our date slaow : 1. Guide-plane provides maximam retention power in cooperation with high fixableindirect retainer. 2. Direction of load and design of the denture are the major responsible factors for shifting the horizontal rotation center of denture body. Especially the shape of indirect retainer was demonstrated to alter direction and amount of displacement of the denture base and abutmenttee t h .3. Most types of uni-lateral distal extention denture exhibited upward and downward movement when they function in vivo. 4. Negative type indirect retainer plased at incisor was shown to be harmful due to its intrinsic stunting force on teeth to labial direction. On the other hand positive type indirect retainer was considered to be more desirable because the force through clasp moves abutment teeth vertically.
社団法人日本補綴歯科学会の論文
1989-10-01