Table 1. Soft tissue dehiscence occurrence distal to the mandibular second molar after surgery using two different flap designs .

	Dehiscence at 1 st week	Extra appointment	Dehiscence size
			X > 5mm	X < 5mm
Envelop flap group	52	12	35	17
N=120
TTF group	23	5	15	8
N=120
TTF: Triangular transposition flap.
X: The largest diameter of the hole, distal to the second molar measured with a Vernier ruler.