膝关节前脱位最常并发的韧带损伤为()
A.内侧副韧带断裂
B.外侧副韧带断裂
C.后交叉韧带断裂
D.前交叉韧带断裂
E.以上都不是
参考答案:D
The Green family________ supper now. [ ]
A. has
B. have
C. is having
D. are having
牙周基础治疗完成2个月后,磨牙区袋深仍5mm左右,附着龈较宽,牙槽骨水平吸收,无异常骨形态,进行牙周手术治疗的最佳选择为
A.根向复位瓣术
B.改良Widman手术
C.牙冠延长术
D.植骨术
E.冠向复位瓣术