The effect of platelet ‐rich fibrin exudate addition to porous poly(lactic‐co‐glycolic acid) scaffold in bone healing: An in vivo study

In this study a novel procedure was adopted to incorporate both the dissolved contents and mechanical components of leukocyte‐ and platelet‐rich fibrin (L‐PRF) into an PLGA scaffold through a two‐step method: (a) extraction of the L‐PRF membrane transudate with subsequent immersion of the PLGA scaffold in transudate followed by (b) delivering a fibrin gel as a low‐viscosity component that subsequently polymerizes into a highly viscous, gel‐like biological material within the pores of the PLGA scaffold. Two, ~0.40 cm3, submandibular defects (n =  24) were created per side using rotary instrumentation under continuous irrigation in six sheep. Each site received a PLGA scaffold (Intra‐Lock R&D, Boca Raton, FL), with one positive control (without L ‐PRF exudate addition [nL‐PRF]), and one experimental (augmented with PLGA/L‐PRF Blocks [L‐PRF]). Animals were euthanized 6 weeks postoperatively and mandibles retrieved, en bloc, for histological analysis. Histomorphometric evaluation for bone regeneration was evaluated as bone area fract ion occupancy (BAFO) within the region of interest of the cortical bone (with specific image analysis software) and data presented as mean values with the corresponding 95% confidence interval values. Qualitative evaluation of nondecalcified histologic sections revealed extensive bone formation for both groups, with substantially more bone regeneration for the L‐PRF induced group relative nL‐PRF group. Quantitative B...
Source: Journal of Biomedical Materials Research Part B: Applied Biomaterials - Category: Materials Science Authors: Tags: ORIGINAL RESEARCH REPORT Source Type: research