Design of Removable Partial Denture

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  • Yamamori Tetsuo
    Department of Prosthetic Dentistry, Ohu University School of Dentistry

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  • 部分床義歯の設計

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Abstract

Minimizing denture mobility is the first principle of partial denture design. This article summarizes the considerations necessary when designing distal extension partial dentures from the standpoint of minimum denture movement.<BR>The border molding using an individual tray in impression making and setting mesial rest effectively restrain the displacement of residual mucose membrane that is closely related with denture mobility. An embrasure clasp is better than an Akers clasp or an RPI clasp as a direct retainer, and improvement of bracing by adding a distal guide plate and widening bracing arms is recommended. Displacement of abutment teeth is influenced by the mesiodistal inclination of the residual ridge. Distal movement of an abutment tooth easily occurs when the residual ridge is inclined distally. Covering the retromolar pad by the denture base and consideration of indirect retainers are important to reduce the displacement of abutment teeth.<BR>Rehabilitation of function and its maintenance are needed to satisfy patients with removable partial dentures. Clinical and experimental data need to be accumulated for the development of partial denture design.

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