Fundamental Studies of Impression Method. Part 9. Mandibular Edentulous Simulation Model.

A considerable amount of research on construction of the complete denture has been reported, used the simulation model as the edentulous aleveolar ridge.The simulation model is required the approximation to the edentulous alveolar ridge on its morphology and caracteristic. Especially, the soft tissue as an impression objectives can be displaced under pressure so that the impression method has influenced on contour variations of the master cast. Therefore, pressure-displaceability is an important property.In this study, the authors attempted to development the simulation model as the maxillary edentulous alveolar ridge and examined its efficiency.The simulation model approximates to the maxillary edentulous alveolar ridge on its morphology. The model is presented, approximates to the pressure-displacement at the masticatory mucosa (alveolar ridge, palate) and lining mucosa. In the process of making impression, the model and any impression material is perfectly separated without the damage of the fine surfaces of the contacting parts and it never cause the electric leak during the study on bearing-stress of basal seat under the denture.From the above results, the reliability of the model could be utilized as the maxillary edentulous alveolar ridge in order to study the impression method and the bearing-stress on basal seat under the denture.