某患者,一上前牙牙冠大部缺损,作桩冠修复时,根管制备的长度应达根长的A.1/5~2/5B.3/5~4/5C.1/4~1/2D.1/2~1/3E.2/3~3/4
患者,一上前牙牙冠大部缺损,做桩冠修复时,根管制备的长度应达到根长的A.40913B.40912C.40910D.40942E.41004
男性,40岁,一上前牙牙冠大部缺损,作桩冠修复时,根管制备的长度应达根长的A.1/2~1/3B.3/5~4/5C.1/5~2/5D.1/4~1/2E.2/3~3/4
某患者,一上前牙牙冠大部缺损,作桩冠修复时,根管制备的长度应达根长的A.1/5~2/5B.3/5~1/5C.1/4~1/2D.1/2~1/3E.2/3~3/4
某患者,一上前牙牙冠大部缺损,作桩冠修复时,根管制备的长度应达到根长的A.1/5B.1/4C.1/2D.2/3E.4/5
某患者,一上前牙牙冠大部缺损,做桩冠修复时,根管制备的长度应达根长的A.1/5~2/5B.3/5~4/5C.1/4~1/2D.1/3E.2/3~3/4
某患者,一上前牙牙冠大部缺损,作桩冠修复时,根管制备的长度应达到根长的A.1/5B.1/4C.1/3D.2/3E.1/2
患者,一上前牙牙冠大部缺损,做桩冠修复时,根管制备的长度应达到根长的A.1/5B.1/4C.1/2D.2/3E.4/5
某患者,一上前牙牙冠大部缺损,作桩冠修复时,根管制备的长度应达根长的A.1/5~2/5B.3/5~4/5C.1/4~1/2D.1/2~1/3E.2/3~3/4