For bone regeneration, which materials are used together?

• A. Type I Collagen and Beta-Tricalcium Phosphate
• B. Hydroxyapatite Beads and Titanium Mesh
• C. Demineralized Bone Matrix and Collagen IV
• D. Poly-L-Lactic Acid and Collagen II

Answer: (A)

The concept tested is how bone regeneration often needs a biocompatible organic scaffold paired with a mineral, osteoconductive component to support new bone growth. Type I collagen provides the natural, extracellular matrix–like framework that cells can attach to, migrate along, and remodel. Beta-tricalcium phosphate is a resorbable calcium phosphate ceramic that mimics bone mineral and gradually dissolves, supplying calcium and phosphate and guiding new bone formation. Together, they create a composite graft that is both biocompatible and osteoconductive, while also being resorbable so the patient’s own bone can replace the material over time. The other pairings either mix a non-bone-specific connective tissue element or combine a non-resorbable barrier with materials not optimized for bone turnover, or involve unlikely cartilage-focused components, making them less suitable for promoting true bone regeneration.