A bilayered bone graft device includes a core portion comprising deminernalized gelatin and a shell portion surrounding the core portion. The shell portion includes a calcium silicate and the deminernalized gelatin in a range of 1 to 30 weight percent, and the calcium silicate has a molar ratio of calcium to silicon ranging from 10 to 0.1. The core portion and the shell portion are bound by the deminernalized gelatin without using a binder. In one embodiment of the present invention, the core portion is configured to provide buffering for receiving an insertion, and the shell portion is configured to provide a load-bearing structure.本發明涉及一種雙層骨移植裝置,其包含一核心部及一環繞該核心部的外殼部,該核心部含有去除礦物質明膠(deminernalized gelatin)。該外殼部包含矽酸鈣及重量百分比範圍介於1至30%的去除礦物質明膠,而矽酸鈣中鈣與矽的莫爾比(molar ratio)介於10至0.1之間。該核心部及該外殼部係藉由去除礦物質明膠相連接而無須鍵結劑。在本發明之一實施例中,該核心部用以提供接收一插接件的緩衝,而該外殼部用以提供一承受負載的結構。20...核心部30...外殼部40...插接件50...承受負載的結構
