Which of the following is considered an alloplast graft material for socket preservation?

• A. Synthetic calcium phosphate
• B. Autograft
• C. Allograft
• D. Xenograft

Answer: (A)

Alloplasts are synthetic graft materials used to fill extraction sockets and provide a scaffold for new bone growth, helping to preserve the ridge after tooth loss. Synthetic calcium phosphate fits this category because it is manufactured, not derived from living tissue, and serves mainly as an osteoconductive framework that supports bone in-growth while staying in place during healing. In contrast, autografts come from the patient’s own body and bring living cells and growth factors, allografts come from another human donor, and xenografts come from another species; none of these are synthetic, so they’re not alloplasts.