Frank R P, Nicholls J I
J Prosthet Dent. 1977 Nov;38(5):494-506. doi: 10.1016/0022-3913(77)90024-5.
A mandibular bilateral distal-extension base removable partial denture was lifted from a model under standardized conditions. The amount of denture base displacement under various loads and the forces of removal were measured electronically. The framework was constructed to allow repeated changes in the type of clasp, location of indirect retainer, and position of the rest seat on the terminal abutment tooth. The usefulness of an indirect retainer in preventing occlusal displacement of the denture base appears to be limited. The type of clasp had the greatest influence on the amount of denture base movement. Proximal surface guiding planes were also found to be important in preventing lifting of the denture base. Use of mesial instead of distal rests on the terminal abutment teeth did not decrease indirect retention.
在标准化条件下，从模型上取下一副下颌双侧远中游离端基托可摘局部义齿。通过电子方式测量了不同载荷下义齿基托的位移量以及取下时的力。该义齿支架的构造允许在卡环类型、间接固位体位置以及末端基牙上支托窝位置方面进行反复更改。间接固位体在防止义齿基托咬合位移方面的作用似乎有限。卡环类型对义齿基托移动量的影响最大。还发现近中面导平面对于防止义齿基托翘起很重要。在末端基牙上使用近中支托而非远中支托并不会降低间接固位作用。
