Abstract
In the method to examine fitness between denture base and basal mucosa, rubber-type materials for denture base adjustment are set between the basal seat and the basal mucosa and pressure welding is done. The remaining thickness differences of the pressed materials reveal unfitness areas. To apply this method, we must consider control and usage of rubber-type materials for denture base adjustment. To establish standards for materials usage, we investigate the influence the following differences had on the thickness of pressed rubber-type materials: catalyst content of rubber-type materials, load and mucosal condition.
Results:
1. As the catalyst increased, so did the remaining thickness of the pressd materials.
2. As load increased, the remaining thickness of pressed materials decreased.
3. As simulated mucosa thickness increased, so did the remaining thickness of the pressed materials.
4. We also investigated locational differences. Compared with simulated mucosa 1, 2mm thick, the thick area of the 4, 8mm thick simulated mucosa tended to remain in the center, rather than on the circumference.
5. When the simulated mucosa was the same thickness with the alveolar ridge form, there is no locational difference on the remaining thickness under the 1mm thick simulated mucosa, and under the 2mm thick simulated mucosa the thick area tended to remain in the crest of alveolar ridge.
When the simulated mucosa was the different thickness, the thick area of the remaining materials tended to remain in the thick part of the simulated mucosa.
