IRCT201404071760N34 IRCT 2014-05-04 Vice Chancellor for Research and Technology, Babol University of Medical Sciences The comparison of Papilla preservation technique and pouch& tunnel with subepithelial connective tissue graft in dark triangle treatment The comparison of Papilla preservation technique and pouch& tunnel with subepithelial connective tissue graft in dark triangle treatment 2014-03-11 anticipated 10 Complete https://irct.ir/trial/1298 interventional Randomization: N/A, Blinding: Double blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment. 2-3 Gingival recession. Intervention 1: Intervention group 1: The first incision is semilunar 3 mm below MGJ .The second incision is sulcular .In semilunar incision flap is reflected full thickness .SCTG is taken from the palate in premolars site and is sutured with a 4-0 silk suture (Manufacturer: Ethicon, Iran) that has been previously passed from the papilla .Periodontal pack(non-eugenol, GC, USA) is placed both on donor and recipient site .For all patients CHX 0.12% is prescribed for two weeks twice a day for 30 seconds each time .Systemic antibiotics(Penicillin vk 500 mg qid) is prescribed for one week .Pack and suture are removed after two weeks. Intervention 2: Intervention group 2: Papilla preservation technique :papilla preservation incision is used and in cases where the width of papilla is short for better vascularization the horizontal incision is placed on labial .SCTG is taken from the palate in premolars site and is sutured in papilla with 4-0 silk suture(Ethicon, Iran)There after the horizontal incision is sutured with the same suture .Periodontal pack(Non-eugenol, GC, USA)is placed both in donor and recipient site .CHX 0.12 % is prescribed for all patients for two weeks twice per day for 30 seconds each time .Systemic antibiotics (Penicillin vk 500 mg qid) is prescribed for one week .Pack and suture are removed after two weeks.