One year after rehabilitation, the bucco lingual alveoli bone loss and the resorption of the residual ridge for the RPA group were lower than those for the RPI and RPC groups.

• 剩余牙槽嵴以及末端基牙颊舌侧牙槽嵴顶的吸收 :RPA组低于RPI组和传统三臂卡环组 ;