Abstract
The occlusal contacts are closely related with the stress distribution on the supporting tissue in complete denture wearers.
The aim of this study was to analyze the relation of the occlusal contacts to the stress distribution pattern on the supporting tissue under the lower complete denture. For this purpose, a three-dimensional finite element model was constructed with occlusion rim and residual ridge mucosa. The stress distribution was calculated with a computer under different loading conditions.
The results were as follows:
1. The stress distribution on the supporting tissue was uniform and the denture base settled perpendicular to the occlusal plane when the sum of the occlusal forces and vectors were localized near the center of the denture base.
2. The stress distribution on the supporting tissue was significantly altered and the denture base was displaced with rotation when the location of the sum of the occlusal force was on points moved antero-posteriorly or laterally.
3. The stress distribution on the supporting tissue by using the finite element method was similar to that obtained by using pressure sensors.
