ABSTRACT
OBJECTIVE: This study was designed to evaluate the effects of 3 different forms of platelet-rich plasma (PRP) on the healing process, wound healing rate, and histopathological changes that occur during recovery of open dermal wounds. MATERIALS AND METHODS: A 2 cm x 1 cm full-thickness skin defect was made on the backs of 40 Wistar female rats that were divided into 4 groups of 10. In group 1 (control group), the wounds were cleaned with saline; in group 2, the wounds were covered with PRP gel obtained by single centrifugation; in group 3, the wounds were covered with liquid PRP obtained by double centrifugation; and in group 4, PRP gel obtained by double centrifugation with added thrombin was applied on the dermal wounds. All treatments were applied on postoperative days 1, 4, 7, and 10. RESULTS: In all PRP groups, the wound closure was almost complete on day 14 while the wound contraction progressed more slowly in the control group. The mean histopathological scores of epithelialization, inflammation, and fibrosis were significantly better in all PRP groups than the scores in the control group. CONCLUSION: In conclusion, although all PRP preparations had positive effects on dermal wound healing, double centrifuged PRP topical treatments (with or without thrombin activation) are more effective than single centrifuged PRP, and double centrifugation methods should be preferred for the preparation of PRP.
