Abstract
Purpose: This study was designed to test the hypothesis that compression-: resistant (CR) scaffolds augmented with recombinant human bone morphogenetic protein-2 (rhBMP-2) at clinically relevant doses in a nonhuman primate lateral ridge augmentation model enhances bone formation in a dose-responsive manner without additional protective membranes. Materials and Methods: Defects (15 mm long × 8 mm wide × 5 mm deep) were created bilaterally in the mandibles of nine hamadryas baboons. The defect sites were implanted with poly(ester urethane) (PEUR)/ceramic CR scaffolds augmented with 0 mg/mL rhBMP-2 (CR control), 0.75 mg/mL rhBMP-2 (CR-L), or 1.5 mg/mL rhBMP-2 (CR-H). The primary outcome of ridge width and secondary outcomes of new bone formation, cellular infiltration, and integration with host bone were evaluated using histology, histomorphometry, and microcomputed tomography (micro-CT) at 16 weeks following implantation. Results: New bone formation in the mandible was observed in a dose-responsive manner. CR-H promoted significantly greater new bone formation compared with the CR control group. In all groups, ridge width was maintained without an additional protective membrane. Conclusion: CR scaffolds augmented with a clinically relevant dose of rhBMP-2 (1.5 mg/mL) promoted significant new bone formation. These results suggest that a CR PEUR/ ceramic composite scaffold without a protective membrane may be a potential new rhBMP-2 carrier for clinical use.
Original language | English (US) |
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Pages (from-to) | 616-624 |
Number of pages | 9 |
Journal | International Journal of Oral and Maxillofacial Implants |
Volume | 35 |
Issue number | 3 |
DOIs | |
State | Published - 2020 |
Keywords
- Bone graft
- Bone morphogenetic proteins
- Compression-resistant
- Histology
- Nonhuman primate
- Polymer
- Ridge augmentation
ASJC Scopus subject areas
- Oral Surgery