An osteoimplant device is provided. The osteoimplant device includes a body of nondemineralized cortical bone and an outer surface having at least one region including demineralized bone. The osteoimplant device is formable into a shape and size configured for implantation at a surgical site. A disc shaped osteoimplant can be used for a facet joint fusion. A method of treating a patient having a bone defect in a host bone is also provided, the method including inserting the osteoimplant into the bone defect, for example, one associated with a facet joint.
