下列何者可做為可撤式局部義齒的間接固位體(indirect retainer)? ①門齒鈎靠(incisal rest) ②舌面隆凸鈎靠(cingulum rest) ③咬合鈎靠(occlusal rest) ④舌側槓(lingual bar)
僅①②③
僅①②④
僅②③④
①②③④