A. 切缘2.0~2.5mm,唇侧1.5mm,舌侧1.0mm
B. 切缘1.5~2.0mm,唇侧1.0mm,舌侧0.5~1.0mm
C. 切缘2.0~2.5mm,唇侧1.0mm,舌侧0.5~1.0mm
D. 切缘1.5~2.0mm,唇侧1.5mm,舌侧0~1.0mm
E. 切缘1.5~2.0mm,唇侧1.0mm,舌侧1.5mm