Problems in Overdentures-What Is Solved and What Isn't-

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  • オーバーデンチャーをめぐる諸問題―解決されたもの，解決途上のもの―
  • What Is Solved and What Isn't
  • 解決されたもの, 解決途上のもの

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Abstract

The advantages of overdenture treatment, which is mainly used for patients withonly a few remaining teeth, are that it improves the crown root ratio and easily corrects the occlusal plane. However, there are some disadvantages, which are related to leaving roots of natural teeth andcoverage of the entire occlusal surface of the root. Although the life of the abutment roots will be prolonged, it is difficult to make an accurate estimate of the prognosis of the remaining teeth. Based on clinical experience, the author suggests the following solutions: 1. For loosening of root caps, use adhesive resin cement. 2. For fracture of dentures, make an adequate design of the reinforcement. 3. For caries and periodontal disease, use an automatic toothbrush and perform professional mechanical tooth cleaning (PMTC). However, there are many overdentures with questionable design for the life of abutment roots, so it is important to distinguish definitive prostheses from transitional overdentures. Malhabits and occlusal forces of patients will have some effects on the prognosis of the remaining teeth. Further studies are required to control the forces and prognosis of the abutment roots.

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