In guided bone regeneration (GBR), there are various problems that occur in the bone defect after the wound healing period. This study aimed to investigate the enhancement of the osteogenic ability of the dual scaffold complex and identify the appropriate concentration of growth factors (GF) for new bone formation based on the novel GBR concept that is applying rapid bone forming GFs to the membrane outside of the bone defect.
Four bone defects with a diameter of 8 mm were formed in the calvaria of New Zealand white rabbits each to perform GBR. Collagen membrane and biphasic calcium phosphate (BCP) were applied to the bone defects with the four different concetration of BMP-2 or FGF-2. After 2, 4, and 8 weeks of healing, histological, histomorphometric, and immunohistochemical analyses were conducted.
In the histological analysis, continuous forms of new bones were observed in the upper part of bone defect in the experimental groups, whereas no continuous forms were observed in the control group. In the histomorphometry, The group to which BMP-2 0.5 mg/ml and FGF-2 1.0 mg/ml was applied showed statistically significantly higher new bone formation. Also, the new bone formation according to the healing period was statistically significantly higher at 8 weeks than at 2, 4 weeks.
The novel GBR method in which BMP-2, newly proposed in this study, is applied to the membrane is effective for bone regeneration. In addition, the dual scaffold complex is quantitatively and qualitatively advantageous for bone regeneration and bone maintenance over time.
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We would like to acknowledge the help from Dr. Hyunmin Choi for the help with animal experiments. This research was funded by Yonsei University School of Dentistry Intramural Faculty Research Grant (Y110523) to Y.P.
Conflict of interest
The authors have no financial conflict of interest.
The breeding, management, and surgical procedures followed the animal testing standards of the Yonsei University Health System Institutional Animal Care and Use Committee, Seoul, Korea. The animal study plan for these experiments (2016–0062) was reviewed and approved by this committee.
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Park, J., Jung, N., Lee, DJ. et al. Enhanced Bone Formation by Rapidly Formed Bony Wall over the Bone Defect Using Dual Growth Factors. Tissue Eng Regen Med 20, 767–778 (2023). https://doi.org/10.1007/s13770-023-00534-z