Increasing the splinted abutment number from 1 to 2,the stress distribution significantly became more evenly,but increasing the number from 2 to 3,there were no significant changes in stress values.

• 基牙数目从1个增至2个，支持骨组织应力分布明显变均匀，但基牙数目从2个增至3个时，应力值的改变无显著差异；