Comparative evaluation of effect of injectable platelet-rich fibrin with collagen membrane compared with collagen membrane alone for gingival recession coverage

Figure 1 Vestibular incision subperiosteal tunnel access technique using collagen membrane along with injectable platelet-rich fibrin for the test sites. A: Preoperative photograph; B: Vertical access incision; C: Subperiosteal tunnel preparation on the distal side; D: Subperiosteal tunnel preparation on the mesial side; E: Coronally anchored suturing; F: Injectable platelet-rich fibrin (i-PRF) soaked collagen membrane placement into the tunnel; G: Injecting i-PRF into mesial, distal periodontal ligament and facial surface of gingiva; H: Final suturing; I: 1 mo follow-up; J: 6 mo follow-up.