Abstract
Objective
The aim of this study was to evaluate histologically the following treatment of bilateral localized gingival recessions with coronally advanced flap (CAF) combined with platelet-rich fibrin (PRF) or subepithelial connective tissue graft (SCTG).
Materials and methods
Tissue samples were harvested from 14 subjects either 1 or 6 months after the surgeries. The 2-mm punch biopsies were obtained from the mid-portion of the grafted sites. Neutral buffered formalin fixed, paraffin-embedded 5-μm thick tissue sections were stained with hematoxylin eosin and Masson’s trichrome in order to analyze the collagen framework, epithelium thickness and rete-peg length. Multiple sequential sections were cut from paraffin-embedded blocks of tissue and immunohistochemically prepared for detection of vascular endothelial growth factor, CD31 and CD34, for the assessment of vascularization.
Results
Rete peg formation was significantly increased in the sites treated with PRF compared to the SCTG group after 6 months (p < 0.05). On the contrary, the number of vessels was increased in the SCTG group compared to the PRF group after 6 months (p < 0.05). No statistically significant differences were observed in the collagen density. Staining intensity of CD31 increased in submucosal area of PRF group than SCTG group after 1 month. Higher staining intensity of CD34 was observed in the submucosal area of PRF group compared with SCTG group after 6 months.
Conclusions
The results of the present study suggest that in histological evaluation because of its biological compounds, PRF results earlier vessel formation and tissue maturation compared to connective tissue graft.
Clinical relevance
PRF regulated the vascular response associated with an earlier wound healing.
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The authors declare that they have no competing interests.
Funding
This work was supported by NIH/NIDCR grant DE020906 and Scientific Technological Research Council of Turkey (TÜBİTAK) Grant: BIDEB-2219 International Postdoctoral Research Fellowship Programme.
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All procedures performed in studies involving human participants were in accordance with the ethical standards of Ethics Committee of the Ege University Izmir, Turkey (2012; no:12–12.1/19) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
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Informed consent was obtained from all individual participants included in the study.
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Eren, G., Kantarcı, A., Sculean, A. et al. Vascularization after treatment of gingival recession defects with platelet-rich fibrin or connective tissue graft. Clin Oral Invest 20, 2045–2053 (2016). https://doi.org/10.1007/s00784-015-1697-8
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DOI: https://doi.org/10.1007/s00784-015-1697-8