The study was divided into 3 times: first time, bef ore surgery procedure; second time, 2 months after the procedure and third time, 6 months after the surgery.

• 手术前、手术后 2个月以及手术后 6个月分别观察前牙区牙龈形态和颜色 ,前牙区牙齿不整齐指数变化情况 ;