When I was doing orthodontics, two No.6 teeth were decayed. After X-ray, my orthodontist said that two No.4 teeth and two No.6 teeth (cavities) should be pulled out. Is it okay?
This is really special. You have to pull out your teeth to get a gap. That's for sure. Generally, you pull out four teeth, and if five teeth are broken, you pull out five. But there are not many 6 teeth, because 6 is almost the size of two 4 teeth, and the gap between two 6 teeth is too large. Pulling out a tooth will cause the midline to deviate to one side. Unless your six teeth have been pulled out, there is no preservation value, otherwise try to keep them.