This invention relates to a composite layered spine intervertebral reposition device implanted between two vertebras, comprising a main carrying member having an intermediate layer and an engaging layer on each surface； and multiple engaging members stably connected to those engaging layers, characterized in that the intermediate layer is made of a polymer material with an elastic modulus between 2 and 22Gpa which is near to 12 to 18Gpa of the original vertebrae, and the engaging member is made of material having excellent cytocompatibility of bone, fusion ability, and developability. Those engaging member are tightly stabilized to the engaging layer. When the device is implanted between the vertebras, the engaging member directly contacts with and uses the engaging teeth to abut against the bone cells of adjacent vertebrae, and the elastic modulus of the intermediate layer is similar, so as to avoid stress shielding effect.一種複合層次脊椎椎間復位裝置，植入於二椎體間，其包含有；一主載件，具有一中間層，及表面各一卡合層；多個卡合件，穩定連結於該等卡合層；其特徵在於：該中間層為一彈性模數介於2至22Gpa之高分子材料，接近該脊椎原12至18GPa，該等卡合件為一具優親骨細胞性、融合性、及可顯影性；該等卡合件緊密穩定於該卡合層，該裝置植入該等椎體間時，該卡合件直接接觸及以該卡合齒抵觸於該等相鄰椎體骨細胞上，及該中間層彈性模數相近，避免應力遮蔽效應。
