A.0.5mm直角肩臺 B.0.5mm120°肩臺 C.1mm凹形肩臺 D.刃狀肩臺
A.0.1mm B.0.2mm C.0.3mm D.0.4mm
A.加大后牙覆蓋 B.調磨過銳的余留牙尖 C.適當升高平面 D.加厚基托推開頰肌