20s
40s
10s
60s
2min
1.乳牙窝沟封闭酸蚀时间为 查看材料
2.乳牙窝沟封闭临床操作的酸蚀时间是()秒,而恒牙为()秒。
3.窝钩封闭中乳牙的酸蚀时间为()A、20sB、40sC、10sD、60sE、2min
4.窝钩封闭中乳牙的酸蚀时间为A.40s B.10s C.60s D.20s E.2min