Abstract
Background: Platelet-rich plasma (PRP) harbors growth factors identified in bone. It has been suggested that these factors enhance osteogenesis. The objective of this study was to conduct a radiographic evaluation on local bone formation following surgical implantation of a PRP preparation using a critical-size rat calvaria defect model. Methods: Thirty 22-week-old male Sprague-Dawley rats were used. The PRP preparation was obtained from 10 ml of whole blood drawn from one age-matched donor rat. The preparation was processed by gradient density centrifugation and stored at -80°C until use. Using aseptic techniques, the PRP preparation soak-loaded onto an absorbable collagen sponge (ACS) carrier or ACS alone was surgically implanted into contralateral critical-size 6 mm rat calvaria osteotomies in 18 animals. Twelve animals received ACS alone versus sham surgery in contralateral defects. Animals were sacrificed at 4 and 8 weeks when biopsies were collected and radiographs were obtained using a standardized protocol. Three masked examiners independently evaluated the radiographic images of the defect sites. Examiner reproducibility was examined by repeat evaluation of all defect sites (r = 0.6; P<0.0001). Results: The animals were maintained without adverse events. Defect sites in two animals receiving ACS versus sham surgery (4-week healing interval) were not evaluated due to specimen damage. Seventy-five percent of the sites (PRP/ACS or ACS) exhibited partial closure at 4 weeks; one site (ACS) exhibited full closure without significant differences between protocols (P = 0.1797). Fifty percent of the sites receiving PRP/ACS exhibited full closure and 20% partial closure at 8 weeks versus 20% and 80%, respectively, for the ACS control (P= 0.7532). There were no noteworthy differences between sites receiving ACS versus sham surgery at 4 or 8 weeks. Conclusion: The results suggest that the PRP preparation does not have a significant effect on osteogenesis.
Original language | English (US) |
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Pages (from-to) | 1287-1292 |
Number of pages | 6 |
Journal | Journal of periodontology |
Volume | 76 |
Issue number | 8 |
DOIs | |
State | Published - Aug 2005 |
Keywords
- Animal studies
- Bone and bones
- Growth factors
- Osteogenesis
- Plasma, platelet-rich
- Tissue engineering
ASJC Scopus subject areas
- Periodontics