軟性裏装材の衝撃緩和に関する基礎的研究

概要

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Although commercial soft lining materials are applied as functional impression materials or tissue conditioning materials except their original application, these materials are widely used to reduce the occlusal force against the residual ridge in short or long term period. In this study, we made an impact force test machine with 4 types of residual ridge form (0 degree, 30 degree, 45 degree, and 60 degree) and experimented the impact force test to 4 commercial soft lining materials (Visco-gel, Soft-liner, Evatouch S, and Evatouch H). Thickness of test pieces of each material was 1mm, 2mm, and 3mm. We evaluated the impact reduction rate of each material and discussed. The results were as follows ; 1. Impact reduction rates were increased significantly by increasing the thickness in all materials. 2. Impact reduction rates of the same thickness were almost same in all materials. 3. There was no influence to impact reduction rate by changing of residual ridge form. 4. Impact reduction rates of acrylic materials at 7 days after dipping water were almost same at 1 day after dipping water. 5. Impact reduction rates of silicone materials at 4 weeks after dipping water were almost same at 1 week after dipping water. These results suggested that there was no need to change the thickness of soft lining materials by type of materials or form of residual ridge, and 2mm of thickness was clinically the best lining method for any soft lining materials.
2004-12-25