Bone screws and particular applications to sacroiliac joint fusion

A method for fusing the sacroiliac joint using an implant, the method comprising screwing an implant into the sacroiliac joint between the sacrum bone and the iliac bone wherein the implant comprises a shaft, a tool engagement flange at top end of the shaft, a pointed tip comprising no more than about 20 percent of the length of the screw, and threads spiraling around the shaft, wherein the volume displacement perpendicular to the shaft increases at least about 5 percent from a point adjacent the tip to a point near the top of the shaft.

A medical implantable screw comprising a headless shaft, a tool engagement flange at top end of the shaft, a pointed tip comprising no more than about 20 percent of the length of the screw, and threads spiraling around the shaft, wherein the volume displacement of the thread increases at least about 5 percent from a point adjacent the tip relative to a point near the top of the shaft and wherein the screw comprises one or more biocompatible materials.

A method for inducing bone in-growth for joint fusion or bone repair, the method comprising placing a blend of a bone powder and a bioactive agent that induces bone growth into a joint or bone fracture.

A composition comprising a blend of bone powder and a bioactive agent that simulates bone growth.

A method for inserting an orthopedic implant into a bone, the method comprising placing a sizing element into a prepared location for a bone screw and tightening the sizing element with a torque wrench to evaluate the size of appropriate bone screw for implantation into the site.

An orthopedic implant comprising a bone replacement materials and a bone growth stimulating biologically active agent, wherein the bone replacement material is a bio-resorbable polymer, a natural or synthetic bone composition or a combination thereof and wherein the biologically active agent is blended into the bone replacement material composition.