作者提出临床上常规远中游离端活动部份义齿常引起不可避免的义齿旋转,即使目前应用有近中支托的Ⅰ型卡有很大成效,但光弹和其他研究表明,卡环对消除基牙的扭力并非完全有效。本研究目的在于对远中游离端活动部分义齿,设计分裂腭大连接杆,测定其负重时所传递到基牙上的扭力是否减小,亦即测定分裂腭杆是否产生应力中断的 The authors suggest that some of the most common distal mid-distal free-standing dentures often cause unavoidable denture rotation, even though the use of Type I cards with near-center support is effective, but photoelastic and other studies have shown that snap ring elimination Torsion of abutments is not completely effective. The purpose of this study is to design the distal part of the distal free denture, the design of the cleft palate large connecting rod to measure the load transmitted to the abutment on the torsion is reduced, that is, to determine whether the fracture of the cleft palate to produce stress interruption