Figure 1.

Clinical examples (radiographs) of two different bone substitute types. (A) beta-tricalcium phosphate (β-TCP) block (red arrow) used in a patient with a multi-fragment proximal tibia fracture. Adapted from [1]. (B) Implantation of a structural allograft in revision total hip arthroplasty, left: clinical radiograph (red box indicates the area where the allograft was implanted), right: post-mortem high-resolution contact radiograph. * indicates absent area with no contact, arrow indicates close contact between the graft and the host bone.