Mothopi-Peri Matshediso, Owen C Peter
Int J Prosthodont. 2018 Mar/Apr;31(2):145-148. doi: 10.11607/ijp.5525.
To compare the influence of abutment teeth guide planes and guiding surfaces on retention of a removable partial denture (RPD).
Extracted teeth embedded into a maxillary cast in the first premolar and second molar positions simulated two bounded saddles. Acrylic resin RPDs were made with no guide planes, then with guide planes, then with guiding surfaces added to directly contact the guide planes. The maximum loads on removal from the cast were recorded.
There was a significant increase in retention force of 1.6 times when only guide planes were present and of 10.2 times when guiding surfaces intimately contacted the guide planes.
The retention of acrylic resin RPDs can be substantially increased by making their guiding surfaces intimately contact the guide planes of the teeth.
比较基牙导平面和导向面对可摘局部义齿（RPD）固位的影响。
将拔除的牙齿嵌入上颌模型的第一前磨牙和第二磨牙位置，模拟两个有界鞍基。制作无导平面的丙烯酸树脂RPD，然后制作有导平面的，再制作添加导向面以直接接触导平面的。记录从模型上取下时的最大负荷。
仅存在导平面时，固位力显著增加1.6倍；当导向面与导平面紧密接触时，固位力增加10.2倍。
通过使丙烯酸树脂RPD的导向面与牙齿的导平面紧密接触，可显著提高其固位力。
