进行天然牙与种植体联合支持固定桥修复时，可在种植体端设计套筒冠固位体，以缓冲种植体周围骨组织的应力水平，防止或减轻种植体支持组织的损伤。
In designing the fixed bridge supported by tooth-implant, we can design telescope retainer on implant to reduce the stress of bone tissues around the implant and to prevent damages to bone tissues.
目的：探讨双侧游离端可摘局部义齿的不同固位装置对基牙的影响。
Objective: To study the influence on the displacement of abutment with various retainer designs for bilateral distal-extension removable partial dentures (RPDs).
目的应用精密附着体固位型可摘义齿修复游离端牙列缺损，评价其临床修复效果。
Objective To evaluate the clinical effects of distal extensive partial dentures with precision attachments.
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