目的：研究下颌后牙固定桥基牙周围牙槽骨表面的应力状态。

Objective: Stress levels of the surface of alveolar bone around bridge abutment of posterior fixed bridge were studied.

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结论：利用残根作为固定桥基牙，可以减少使用健康牙作基牙，并能扩大固定桥修复的适应证。

CONCLUSION: Residual root being used for fixed-bridge abutment tooth may reduce healthy tooth being used in abutment tooth, and it can enlarge indications of repairing fixed-bridge.

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目的：探讨残根作为固定桥基牙的修复效果和临床意义。

AIM: to investigate the repairing effect and clinical significance of using the residual root for fixed bridge abutment tooth.

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