顎堤形態が床下支持域の応力分布および義歯挙動に及ぼす影響

抄録

The purpose of this study was to investigate the influence of the difference in shape of ridge height to the denture mobility and the stress distribution of denture supporting area. A three-dimensional finite element model of ordinary mandibular residual ridge was constructed symmetrical with respect to median sagittal plane (model a) and transformed into 4 other models. The denture mobility and the stress distribution were calculated by a computer under 9 loading conditions.
The results were as follows:
1. High stress concentration was found around the alveolar crest on part of the high ridge area while on the absorption area the concentration was found along the denture border.
2. The denture moved along alveolar crest on the high ridge area, but the denture moved across the alveolar crest on the low ridge area.
3. The denture mobility and the stress distribution of denture supporting area were significantly altered by the difference in shape of ridge.
4. The maximum of stress on the denture supporting area and vector as denture mobility were least when loading forces were localized near the center of the denture model for any model.