Development of Damage Healing Type Smart Denture by Optimization of Materials Design

1.低纤维-树脂界面滑动强度和高界面粘结强度是高性能智能义齿形状恢复准确、强度高的关键。对纤维进行镀金是改善树脂中纤维色泽不美观的一种很好的解决方案，但界面性质的变化尚不清楚。采用商用粘接底漆对形状记忆合金纤维和镀金纤维进行了界面粘结性能和滑动性能的测试。发现了一种粘结强度较高、滑动强度较低的底漆，适用于初生纤维，但不适用于镀金纤维。这种差异是由于两种纤维表面粗糙度的差异造成的：在镀金之前进行表面研磨，以改善纤维与金的结合。结果表明：1.镀金层不能使纤维表面的粗糙度变平，表面粗糙的镀金层纤维的滑动强度高于未涂覆的纤维。由于义齿基托的三维形状，纤维很难均匀地嵌入义齿基托中。如果纤维位置偏差对智能义齿性能的影响可以忽略不计，那么其均匀性也可以忽略不计。由于数据偏差较大，有纤维和无纤维试件的修复精度评价没有显着性差异。然而，为了准确修复，需要改善较大的偏移量，并且需要一种用于将纤维嵌入义齿基托的模板。义齿基托曲面与纤维曲线形状不匹配对修复精度影响不大。因此，直形纤维适合作为埋入纤维。

1. Low fiber-resin interfacial sliding strength and high interfacial bonding strength are the key factors in high performance smart denture with accurate shape recovery and high strength. Gold coating to the fiber is a good solution to improve the low esthetic fiber color in the resin, but the interfacial property change is unknown. Commercial bonding primers were applied for as-received shape memory alloy fiber and gold-coated fiber, and the interfacial bonding and sliding property were tested. A primer with high bonding strength and low sliding strength was found for as-received fiber, but was not found for gold-coated fiber. The difference was derived from the difference in surface roughness between the two fibers : a surface grinding was performed before gold-coating to improve the bonding between the fiber and gold. The gold coating could not flatten the roughness, and rougher surface of gold-coated fiber showed higher sliding strength than as-received fiber.2. Since the denture base has three-dimensional shape, it is difficult to embed the fibers into the denture base homogeneously. If the fiber position deviation effect to the smart denture properties is negligible, the homogeneity is also negligible. Repair accuracy evaluation of specimens with and without fiber did not show significant difference due to the large deviation of data. However, the large deviation should be improved for the accurate repair, and a kind of template for fiber embedding into denture base was required. The effect of shape mismatch between the curved plane of denture base and curve of fiber on repair accuracy was not large. Therefore, straight shape fiber was appropriate for the embedded fiber.