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Osseous wound healing with xenogeneic bone implants with a biodegradable carrier
J O Hollinger1, J P Schmitz, D E Mark
1U.S. Army Institute of Dental Research, Walter Reed Army Medical Center, Washington, DC 20307-5001.
Surgery
|January 1, 1990
Summary
Human antigen-extracted, autolyzed (AA) bone implants show significant bone healing in primate skull defects. These xenogeneic implants elicited a strong osseous response, outperforming bovine bone morphogenetic proteins.
Area of Science:
- Biomaterials Science
- Orthopedic Research
- Regenerative Medicine
Background:
- Critical-size bone defects pose significant challenges in reconstructive surgery.
- Autografts are the gold standard but have limitations.
- Novel bone graft substitutes are needed to improve healing outcomes.
Purpose of the Study:
- To evaluate the efficacy of human antigen-extracted, autolyzed (AA) bone implants compared to bovine bone morphogenetic proteins and autografts.
- To assess the osseous regeneration in critical-size calvarial defects in nonhuman primates.
Main Methods:
- Preparation of AA bone and bovine bone morphogenetic protein implants in biodegradable carriers.
- Comparison with autogenous bone grafts and controls in critical-size defects.
- Radiomorphometric and histomorphometric analysis of bone healing at 3 and 6 months post-surgery.
Main Results:
- No adverse immunologic responses were observed with the experimental implants.
- Autografts yielded the greatest new bone volume (p < 0.01).
- AA implants significantly enhanced bone formation compared to bovine bone morphogenetic proteins and controls (p < 0.05), showing coalescing bone islands and normal bone structure by 6 months.
Conclusions:
- Xenogeneic AA implants demonstrate potential for excellent osseous response in critical-size calvarial defects.
- The biodegradable carrier effectively served as a soft-tissue spacer.
- AA bone implants represent a promising alternative for bone regeneration strategies.