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Abstract：
Aim: This study investigated the effect of sodium citrate on the properties and biological activity of plasma rich in growth factors (PRGF). Methods: PRGF was obtained from trisodium citrate and plain extraction tubes. Hematological parameters, growth factors\' release kinetics from both PRGF clots and their releasates\' biological effect on human bone cells were evaluated. Results: The platelet enrichment factor, the growth factors\' content and the release kinetic of PRGF were similar for both groups. The proliferation, collagen type I synthesis and tissue-nonspecific alkaline phosphatase activity of human osteoblasts showed no statistically significant differences. Conclusion: The use of sodium citrate does not influence the composition, the growth factors\' release kinetics or the biological effect of PRGF, but it increases its clinical versatility.
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