The design of rigid fixedbridge is superior to free-end fixedbridge and be propitious to the the health of the reserved root by dispersing the stress of reserved root more effectively.
The design of rigidly fixedbridge was superior to free-end fixedbridge 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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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.