种植修复资料.ppt

咬合面材料折断 (Fracture of occlusal material) 应力集中在螺丝孔上 (concentrate stress on screw hole) 修复体就位困难(Access) 患者开口度有限，螺丝难于就位，且容易误咽 (It is difficult to access with a limited mouth opening patient. And one can easily swallow screw while handling instrument.) 疲劳 (Fatigue) 应力作用在修复体支持结构上，甚至会引起种植体断裂 (weighting stress on prosthetic supporting structure even brings about fracture of implant.) 螺丝松动 (Screw loosening) According to several report, 50% of screws of prosthesis on upper dentition is loosened at least 1 time within 1 year after loading. Depending on single implant study, 65% of screws loosening occurs within 3 years after loading. ☆ Rec) cement-retained prosthesis 后牙区咬合面材料 (Occlusal material of posterior area) 烤瓷？树脂？→ 金属 (Porcelain ?, Resin? → Metal occlusion) 树脂和烤瓷容易碎裂 (Fibrous and hard food; easily porcelain and resin chipping or fracture.) 须考虑功能紊乱(夜磨牙，紧咬牙) (parafunction (Bruxism, Clenching) must considered) * Zirconium core + porcelain 咬合面形态 (Occlusal form) 侧方不能有剪切力 (Shear strength must not be occurred by lateral force ) 大小和天然牙相似或者略小 (Similar to natural size or a little smaller than natural tooth.) 增龄性咬合面和邻面磨损，将使天然牙向近中移位 (Natural teeth move to mesial side because of abrasion of occlusal and interproximal surface in aging.) 由于骨整合，种植体不会发生移位。因此，在邻接区容易引起食物嵌塞。为了修补邻接面，修复体需要具备可修补性。 (Implant can not be moved by osseointegration. Therefore, there easily occurs food impaction on interproximal area. So retrievability of prosthesis has to be easy in order to repair contact surface.） 理想合 (Ideal occlusion) 交错保护合 (Mutually protected occlusion) 尖牙保护合 (Canine protected occlusion) 组牙功能合 (Group function occlusion) 平衡合(全口义齿) ( Balanced occlusion (full denture)) 种植体保护合 (Implant protected occlusion) 避免让种植修复体过载 (Avoid add up overforce on Implant prosthesis.) 植入前 (When should implant be installed) 确定种植体数目、直径和长度 (Confirm the sufficient number of implant, and consider its diameter and length.) 最理想的种植位点和种植体散布于牙弓上 (Optimal i