合适的基牙外形是保证可摘义齿固体的必要条件之一。但在观测器上研究模型时,有些基牙牙冠缺乏倒凹,不利于义齿固位。如用壳冠使基牙成形,需作基牙预备,壳冠龈缘刺激牙周组织,也不是都能得到良好的效果。为使基牙成形,建立有利于可摘义齿 The proper abutment shape is one of the necessary conditions to ensure the removable denture solid. However, when observing the model on the observer, some of the abutment crowns are not concave and concave, which is not conducive to the denture retention. Such as the use of shell crown to make abutment, the need for abutment preparation, gingival margin of the shell to stimulate the periodontal tissue, nor can all get good results. In order to shape the abutment, the establishment of a removable denture