[Biocompatibility and osteoinductive properties of collagen and fibronectin hydrogel impregnated with rhBMP-2]

The study aimed to demonstrate the biocompatibility and osteoinductive properties of a hydrogel based on highly purified collagen and fibronectin impregnated with rhBMP-2. In vitro and in vivo experiments have shown that the minimum effective dosage of rhBMP-2 is 10 μg/ml. The cytocompatibility of the collagen-fibronectin gel was determined using MTT test and staining with PKH-26. There was no inflammation reaction when the material was subcutaneously implanted in rats (n=30) in vivo. The collagen-fibronectin hydrogel containing 10 μg/ml rhBMP-2 showed high osteogenic properties. By the end of 28 days 8±4% of its volume was replaced by newly formed bone tissue in case of subcutaneous implantation, 17±10% in intramuscular implantation and 26±11% in intraosseous implantation in the calvarial critical-size. The optimal combination of biocompatible and osteogenic properties of collagen-fibronectin hydrogel impregnated with BMP-2 allows us to consider it as a promising basis for creating the new generation of osteoplastic materials for dentistry.