回复：刚带儿子看牙医回来，医生让拔牙，

If that's what the doctor said, you probably have to go through that. That's a lesson for you, though. When the kid gets permanent teeth, make sure he/she brush them correctly; I suppose you can check whether he/she is doing the right way once a week and demonstrate the correct way. Also check the teeth with a flash light at home once a while (say every month or so) so you can catch problem before it gets serious--of course, the important thing is to do prevention. And you need to do flossing for him/her at this age.

The anesthesia will last one or two hours after the operation; after that the kid will be limpy and moody for a day, so better stay at home with him. Otherwise there should be nothing to worry about. It surely will cost you a fortune.