Surgical phase
The surgical stage for each side was accomplished separately (right–left) at two different times, so that the surgical operation for the second side was done after ensuring the recovery of the first side, with a time difference of at least 1 month. The method of surgery described by Sullivan and Atkins (Control group. (a) Gingival recession (GR) on left canine. (b) Recipient site preparation. (c) Free gingival graft. (d) Suturing the graft in its place. (e) Healing after 1 week. (f) Healing after 2 weeks. (g) Healing after 1 month. (h) Healing after 3 months. (i) Healing after 6 months.Test group. (a) Gingival recession (RR) on right canine. (b) Recipient site preparation. (c, d) Injectable platelet‐rich fibrin. (e) Free gingival graft. (f) Injectable PRF (i‐PRF) application on root surface. (g) Suturing the graft. (h) Healing after 1 week. (i) Healing after 2 weeks. (j) Healing after 1 month. (k) Healing after 3 months. (l) Healing after 6 months.