Method: Twelve subjects with Miller Class I or II defects were selected. The defects were ≥ 3.0 mm deep and were assigned randomly to the test group, which was treated with a coronally positioned flap associated with a T-PRF membrane, or to the control group, which was treated with a coronally positioned flap associated with a free connective tissue graft. Probing depth (PD), clinical attachment level (CAL), gingival recession depth (GRD), and keratinized tissue width (KT) were assessed at baseline, 1 month, and 6 months after the surgery.
Result: The mean initial gingival recessions were 4.96 mm and 5.29 mm in test and control groups, respectively. Six months after surgery mean root coverage was 79.8 % in the test group (representing a mean gingival magrin shift of 3.96 mm) and 72.3 % in the control group (representing a mean gingival magrin shift of 3.79 mm). No statistically significant differences were found between the two groups according to the post-surgical 6 months measurements (P ≥ 0.05).
Conclusion: The results demonstrated that coronally positioned flap associated with a T-PRF membrane is safe and effective in a treatment of Miller Class I or II gingival recession defects without the morbidity and potential clinical difficulties associated with donor-site surgery.