Objective : to study the relationship between angle of tilted abutment and stress distribution of periodontal tissue , and todetermine the angle limit for fixed prosthesis 目的:探讨基牙牙周组织受力与其倾斜角度的关系,找出能够进行固定修复的基牙倾斜角度的极限值。
Crehsm breaks through the revolving angle limit of the swing motors on turn tables and can expend application of hydraulic turn tables . the system with crehsm should be able to work at ultra - low speed and output heavy torque with high frequency response 仿真转台直接驱动用的连续回转电液伺服马达应实现超低速、高精度、宽调速、高频响等性能指标的要求。