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Updated: Jan 30, 2026

Calvarial Model of Bone Augmentation in Rabbit for Assessment of Bone Growth and Neovascularization in Bone Substitution Materials
Published on: August 13, 2019
Bone regeneration using three-dimensional hexahedron channel structured BCP block in rabbit calvarial defects
Hyung-Chul Pae1, Joo-Hyun Kang1, Jae-Kook Cha1
1Department of periodontology, Research institute of periodontal regeneration, Yonsei University College of Dentistry, Seoul, South Korea.
A novel three-dimensional (3D) structured biphasic calcium phosphate (BCP) block demonstrated superior bone regeneration and volume maintenance in rabbit calvarial defects compared to other bone graft materials.
Area of Science:
- Biomaterials Science
- Regenerative Medicine
- Skeletal Biology
Background:
- Bone defects require effective regenerative strategies.
- Biphasic calcium phosphate (BCP) is a promising biomaterial for bone regeneration.
- Optimizing the structure of BCP scaffolds can enhance bone formation and stability.
Purpose of the Study:
- To evaluate the bone regeneration and volume maintenance efficacy of a 3D structured biphasic calcium phosphate (BCP) block with porous hexahedron channels.
- To compare the performance of this novel BCP block against control, deproteinized bovine bone mineral, and deproteinized porcine bone mineral in a rabbit calvarial defect model.
Main Methods:
- Creation of four circular calvarial defects (8 mm diameter) in rabbits.
- Random assignment of defects to: negative control, 3D hexahedron channel structured BCP block, deproteinized bovine bone mineral, or deproteinized porcine bone mineral.
- Assessment of bone regeneration and volume maintenance using micro-computed tomography (micro-CT) and histomorphometrical analysis at 2 and 8 weeks post-implantation.
Main Results:
- The 3D hexahedron channel structured BCP block group exhibited significantly higher new bone volume compared to the control group at 8 weeks (p = 0.008) via micro-CT.
- Histomorphometrical analysis revealed the BCP group had the largest total augmented area, significantly greater than the control (p = 0.008) at 8 weeks.
- The BCP block effectively maintained the original defect volume without collapse, indicating good structural integrity.
Conclusions:
- The 3D hexahedron channel structured BCP block demonstrates favorable osteogenic and volume-maintaining capabilities.
- The highly porous structure of the BCP block likely contributes to enhanced new bone formation.
- Further research is warranted to optimize the internal structure and porosity of BCP block bone substitutes for improved clinical outcomes.
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