For a graft extraction site, which materials are described as used?

• A. Collagen Type I and Calcium Apatite Crystals
• B. Collagen Type II and Calcium Sulfate
• C. Gelatin Sponge and Beta-Tricalcium Phosphate
• D. Autograft Bone and Titanium Mesh

Answer: (A)

For a graft at an extraction site, the materials are chosen to provide a scaffold that supports bone regeneration while integrating with the natural bone’s mineral content. Collagen Type I serves as the main organic framework, offering a biocompatible, resorbable matrix that cells can attach to and migrate across as new bone forms. Pairing this with calcium apatite crystals delivers the mineral phase that reinforces the scaffold and guides mineralized bone growth, helping to maintain space and promote stable, osteoconductive healing. This combination mirrors the natural bone composition and is well-suited to socket grafting.

Collagen Type II would be more related to cartilage, not bone, so it isn’t the right fit for bone grafting in a socket. Calcium sulfate is a bone substitute but tends to resorb quickly and may not provide the same long-term scaffolding as calcium apatite crystals. Gelatin sponge is primarily a hemostatic material rather than a durable graft scaffold, and beta-tricalcium phosphate, while useful, is not described here as the paired material with collagen Type I. Autograft bone with titanium mesh is used in larger reconstructive procedures rather than the typical graft described for an extraction socket.