Objective: To compare the effects of the posts with different diameters and with or without core on the fitness of framework for free end implant bridge.
目的：考察不同种植基桩桩径对游离端缺失种植固定桥支架适合性的影响，以探讨临床上有无内冠与支架适合性的关系。
The design of rigid fixed bridge is superior to free-end fixed bridge and be propitious to the the health of the reserved root by dispersing the stress of reserved root more effectively.
双端固定桥设计优于单端固定桥，更好的分散了半切后保留牙根的牙周膜的负担，有利于半切术后余留牙根的牙周支持组织健康。
The design of rigidly fixed bridge was superior to free-end fixed bridge and single crown.
双端固定桥设计优于单端固定桥和单冠修复。
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