纵线式支点线可摘局部义齿是指支点线位于牙弓的一侧而成前后方向者，属Cummer分类第三类。对基牙固位条件差者，按常规设计往往支架易从船方脱位或沿支点线摆动，最终因固位和稳定作用差而失败。以往我们都是通过增加固位体的数目和增大支架面积加以改善，如此必然增强患者的 Longitudinal fulcrum line removable partial denture refers to the fulcrum line at one side of the dental arch and into the front and rear direction, which belongs to the third category Cummer. Poor retention of the abutment, according to the conventional design is often easy to dislodge from the ship or swing along the fulcrum, the final result of poor retention and stability failure. In the past we have been through the increase in the number of retainers and to increase the stent area to be improved, so inevitably enhance the patient's