Evaluation of platelet-rich fibrin versus collagen membrane for enhancing healing of secondary grafted alveolar cleft: a randomised controlled trial.

The purpose of this study was to compare the efficiency of using autologous platelet-rich fibrin versus a resorbable collagen membrane in secondary alveolar bone grafting. Patients were randomly allocated to the three treatment groups: Group 1 - twelve children in whom the nasal layers of the alveolar clefts were repaired using autologous platelet-rich fibrin with autogenous chin bone; Group 2 - twelve children in whom the nasal layers of the alveolar clefts were repaired using bovine collagen membrane type I (Colla-D) with autogenous chin bone; and Group 3 - twelve children in whom the bony alveolar clefts were grafted with autogenous chin bone after construction of a watertight nasal floor had been completed. The study population comprised 36 patients with alveolar clefts, ranging in age from seven to 12 years. At the last follow-up period all groups had stable healing conditions and good radiological outcomes in terms of the alveolar bone height bordering the teeth (both mesially and distally) and the incorporation of grafting material with the surrounding bone. The use of either a PRF membrane and a collagen membrane as an interpositional layer between the nasal layer and the autogenous chin bone graft enhanced bone formation and density in alveolar clefts compared with the control group.