the osteoimplant in an embodiment the allograft fiber matrix can have pores of about 1 0 to about 5 0 mm diameter in size in an embodiment the addition of the collagen slurry provides a collagen matrix with pores large enough to allow cell migration in such as having pores greater than about 0 01 mm diameter in a particular embodiment the collagen slurry after freeze drying can have pores about 0 01 mm to about 3 0 mm diameter in size the formation of the osteoimplant further includes cutting the matrix material into the final desired shape the desired shape is dependent upon the site of implantation in an embodiment the osteoimplant may be pre shaped for a specific target region or may be provided in a standard shape that may be later tailored by the physician for the particular requirements of the implant site any suitable method may be used to shape the osteoimplant and may be performed before or after the matrix is formed typically the osteoimplant may be cut with any reasonable medical or surgical tool such as a saw file blade and the like processing of the matrix may be performed under aseptic conditions such that the final osteoimplant is sterile and does not require a terminal sterilization procedure alternatively the matrix may be processed under less rigorous conditions and terminal sterilization is used to achieve sterility various methods of terminal sterilization may be used such as gamma or electron beam irradiation ethylene oxide etc but should be controlled to ensure the final osteoimplant maintains appropriate biological characteristics for supporting bone growth generally the matrix including the partially demineralized fibers and optional collagen and additives form the osteoimplant the.