The effect of a hydroxyapatite impregnated PCL membrane in rat subcritical calvarial bone defects

Publication date: October 2017
Source:Archives of Oral Biology, Volume 82
Author(s): Monica Feresini Groppo, Paulo Henrique Caria, Alexandre Rodrigues Freire, Sidney R. Figueroba, Wilson Alves Ribeiro-Neto, Rosario Elida Suman Bretas, Felippe Bevilacqua Prado, Francisco Haiter-Neto, Flavio Henrique Aguiar, Ana Claudia Rossi
ObjectiveThe present study evaluated the effect of polymeric-nanofibers membranes impregnated with microparticulate hydroxyapatite (HA) in the subcritical calvarial bone defects (SCBD) healing.DesignPCL membranes with and without HA were obtained by electrospinning. SCBD were perforated (3.3mm) in left and right sides of 36 rat calvarias. The right-side SBCD of 18 animals was filled with HA mixed with blood clot and blood clot at the contralateral side. The remaining animals received PCL+HA membrane at the right-side SCBD and PCL membrane at the contralateral side. Animals were killed after 30, 60 and 90days after surgery. Bone defect volume (in mm³) was measured by tomography (CBCT). Qualitative histological analysis and SBCD area (in mm²) were measured. Quantitative data were submitted to Kruskal-Wallis/Dunn tests.ResultsReduction of SBCD volume was observed in all treatments but PCL. Association with HA significantly improved bone healing induced by PCL and blood clot. PCL+HA induced the lowest SBCD volume at 60 and 90days. Complete bone healing was not observed even at 90days in SCBD treated with blood clot. In every period, more bone formation was observed for SCBD treated with membranes.ConclusionsWe concluded that both PCL membrane and HA were able to improve bone healing.

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