Patent ID: 8603183

Claim:
A bilayered bone graft assembly, comprising: a core portion including a first demineralized gelatin, the core portion being configured to receive an insertion; a shell portion surrounding the core portion, the shell portion including a calcium silicate and a second demineralized gelatin, wherein the second demineralized gelatin is in a range of 2 to 20 weight percent relative to the total weight of the shell portion, the calcium silicate having a molar ratio of calcium to silicon ranging from 10 to 0.1, the shell portion being configured to provide a load-bearing structure; wherein the shell portion is prepared using a sol-gel method and hydrothermal processing and has a compressive strength between 100 and 145 MPa, and is adapted for load-bearing bones; and wherein the core portion and the shell portion are bound by the first and second demineralized gelatin.