Abstract
This study aimed to evaluate the intensity of the subacute local biological effects after implantation and osseoconductive potential of novel hydroxyapatite-based bone substitute coated with poly (lactide-co-glycolide), named ALBO-OS, in comparison to Bio-Oss®. Fifteen male Wistar rats, randomly assigned into groups: 10, 20, and 30days (n꞊5), were subcutaneously implanted with ALBO-OS and Bio-Oss®. Furthermore, artificially made bone defects on both rat's tibias were implanted with experimental materials. Unimplanted defects represented negative control. After the animals' euthanizing, tissue samples were prepared and analyzed histologically and histomorphometrically. Normal healing of the epithelial tissue was observed, with no signs of infection or necrosis. Minimal vascular congestion was noted immediately around the graft, with no signs of tissue oedema, with a minimal capsule thickness. The applied material did not cause an inflammatory response (IR) of significant intensity, and 20days after implantation, the IR was mainly assessed as minimal. Thetibial specimen showed that ALBO-OS has good osseoconductive potential, similar to Bio-Oss®, as well as low levels of acute and subacute inflammation. The tested material exhibits satisfying biocompatibility, similar to Bio-Oss®.
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