Abstract
The elderly population is increasing at a far more rapid rate in Japan than in Europe and North America. In fact, one Japanese in four will be over the age of 65 by 2020.
At present, many elderly patients have multiple dental defects, even though the 8020 movement has been proposed. It is extremely important for us to provide high-quality medical care. Many teeth can now be preserved through progress in appliances, materials, and technology.
We studied the characteristics of elderly patients and designed dentures with a double structure metal framework, with both the mechanical strength and durabilith. We also developed abutments using a coping telescope system.
1. Overdentures for eldely patients should be designed in accordance with the principles for complete dentures.
2. The denture border should cover the gingivolabial margin of the retainer, without notches at the denture border, and extend to gingivobuccal so far as possible.
3. The, mucosal surface of the denture base should be of the total resin type.
4. Metal base dentures with a double structure are able to withstand long-term use, and so are preferred for permanent dentures.
5. Overdenture retainers should use a coping telescope system.
