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.

Figure 2 Vestibular incision subperiosteal tunnel access technique using collagen membrane alone for the control sites. A: Preoperative photograph; B: Vertical access incision (control site); C: Subperiosteal tunnel preparation on the distal side; D: Subperiosteal tunnel preparation on the distal side; E: Subperiosteal tunnel preparation on the mesial side; F: Collagen membrane placement into the tunnel; G: Final suturing; H: 1 mo follow-up; I: 6 mo follow-up.

Figure 3 CONSORT flow diagram.

Figure 4 Comparison of injectable platelet-rich fibrin + collagen membrane and collagen membrane at different time intervals. A: Comparison of mean plaque index (PI) scores; B: Comparison of mean gingival index (GI) scores; C: Comparison of mean pocket depth (PD) scores; D: Comparison of mean recession depth (RD) scores; E: Comparison of mean recession width (RW) scores; F: Comparison of mean relative attachment level (RAL) scores; G: Comparison of mean keratinized tissue width (KTW) scores; H: Comparison of mean keratinized tissue thickness (KTT) scores. CM: Collagen membrane; i-PRF: Injectable platelet-rich fibrin; PI: Plaque index; mo: Month.

Figure 5 Percentage of root coverage. A: Injectable platelet-rich fibrin (i-PRF) + collagen membrane (CM) group (in percentage); B: CM group (in percentages); C: Following treatment with i-PRF + CM and CM. mo: Month.