3D Printed Beta-TCP Ceramic Bone Replacement Manufactured by Lithography-Based Ceramic Manufacturing: A Short-Term...

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Additive Manufacturing

Background:

• Clinical use of beta-tricalcium phosphate (β-TCP) is hindered by poor bone infiltration in bulk forms.
• Novel additive manufacturing (AM) techniques like lithography-based ceramic manufacturing (LCM) offer improved control over scaffold architecture.

Purpose of the Study:

• To evaluate the bone regenerative potential of 100% β-TCP scaffolds fabricated using LCM.
• To assess the repair of critically sized mandibular defects in a rabbit model.

Main Methods:

• Fabrication of β-TCP scaffolds using LCM.
• Surgical implantation into critical-sized mandibular defects in skeletally mature rabbits.
• Analysis of regenerated bone using micro-computer tomography (micro-CT) and histology.

Main Results:

• LCM β-TCP scaffolds demonstrated bone regeneration, with approximately 8.6% regenerated bone and 33% remaining scaffold volume.
• Histological analysis revealed vascularized woven and lamellar bone, with no adverse effects like ectopic ossification or significant inflammation.
• Radiographic and histologic findings were comparable to native bone.

Conclusions:

• LCM-fabricated β-TCP scaffolds effectively promote bone regeneration in critical-sized mandibular defects.
• This AM technique allows for precise control over scaffold properties, enhancing bone integration.
• LCM β-TCP shows potential as a biomaterial for craniofacial bone defect repair.