Comparative clinical evaluation of triangular flap design and trapezoidal flap design with advanced platelet-rich fibrin in the treatment of human gingival recession: A randomized clinical trial.

Background: Platelet concentrates play an important role in gingival recession (GR) treatments. Hence, the existing study aimed to evaluate two different coronally advanced flap designs with advanced platelet-rich fibrin (A-PRF) in the treatment of human GR. Materials and Methods: This randomized clinical trial treated a total of 40 recession sites (20 per group). Trapezoidal and triangular flap designs were performed with A-PRF as biomaterial for GR. The clinical parameters such as probing depth, clinical attachment level, recession depth, recession width, width of keratinized tissue (WKT), and gingival thickness (GT), were recorded at baseline, 3, and 6 months. Results: During intragroup comparison postoperatively, all the parameters showed a statistically significant difference. While intergroup comparison showed no significant difference, GT and WKT were increased at 3 and 6 months. At 3 months, percentage of mean root coverage (MRC%) obtained in Group 1 was 95.83% and in Group 2 was 97.3%. While at 6 months, MRC% for Groups 1 and 2 was 88.03% and 82.16%, respectively. Conclusion: Both the flap techniques helped in improvement of clinical parameters for RC. A-PRF that was utilized in both groups helped in rapid healing without any adverse events. Even though the trapezoidal flap design showed keloid formation (KF), it was superior to the triangular flap design in terms of root coverage, as evidenced by higher GT and WKT and improved MRC%. The triangular flap design had the benefit of prevention of KF and improved the esthetic outcomes.