Abstract: After crown lengthening surgery for anterior teeth, surgical suture should be proceeded to close gingival flap. Suture and knots exposure on labial surface will affect the aesthetic outcome before suture removal. And dental biofilm and plaque will accumulate rapidly on sutures, then lead to infection and inflammation. We design a new minimal invasive aesthetic suture technique to hide labial suture by sub-epithelial suture and palatal knotted. Fifteen patients, who was performed with this suture technique after upper anterior teeth crown lengthening surgery, get satisfied aesthetic outcomes and feel little uncomfortable.

Key words: Esthetic suture, Crown lengthening surgery, Aesthetics