Patent ID: 6607561
Filing Date: 2003-08-19
Classification: A61B,A61F

Abstract:
A surgical implant intraosseous biaxial compression of an autogenous cancellous osteomedullary bone cylinder comprising:(a) a bone barrel and a cortical side plate, said bone barrel includes a passageway having an internal mating thread, and an outer barrel surface, said bone barrel is in structural mechanical confluency with said cortical side plate so as to establish an angle &thgr; at the juncture thereof and said cortical side plate, said cortical side plate is of a shape to abut a lateral cortex of a proximal femur, said bone barrel is of a size and dimension adapted for insertion into a lateral portal of entry of the proximal femur, said bone barrel is further of a size and dimension adapted to ensure a collection of bone growth elements is retained therein a femoral head and a femoral neck of the proximal femur so as to induce bone formation therein, the lateral portal of entry includes an inner bony surface for slidably engaging said outer barrel surface of said bone barrel, said angle &thgr; is of a dimension to ensure said cortical side plate abuts the lateral cortex of the proximal femur so as to ensure said bone barrel remains substantially parallel and coaxially aligned with the inner bony surface of the lateral portal of entry at all times, said cortical side plate includes a screw hole for allowing the passage of a bone screw therethrough to provide rigid fixation thereof to the lateral cortex of the proximal femur so as to substantially prevent displacement of said bone barrel during ambulation on the proximal femur, and; (b) an osteomedullary rod having a compression head, an axial threading, and a driver end, said axial threading is adapted to engage securely said internal mating thread so as to prevent inadvertent medial or lateral displacement of said osteomedullary rod, said driver end is of a size and shape adapted to engage a screwdriver for axially rotating said osteomedullary rod, said axial threading is further adapted to cause said compression head to abut an autogenous cancellous osteomedullary bone cylinder when said osteomedullary rod is rotated clockwise, the autogenous cancellous osteomedullary bone cylinder includes a medial facing first axial surface for receiving a first static compressive force when the medial facing first axial surface is positioned in contact with a region of overlying cartilage of the femoral head, the autogenous cancellous osteomedullary bone cylinder further includes a lateral facing second axial surface for receiving a second static compressive force imparted thereon by said compression head having a size and shape adapted therefor, said axial threading is further adapted to induce a static biaxial compressive force thereon the autogenous cancellous osteomedullary bone cylinder when said osteomedullary rod is rotated further axially clockwise to position said compression head in a substantial medial location within the femoral neck, said static biaxial compressive force comprising said first and said second static compressive forces, said static biaxial compressive force is of a magnitude to induce the collection of bone growth elements to be extravasated from the autogenous cancellous osteomedullary bone cylinder and to flow into a region of surrounding cancellous bone, said axial threading is further adapted to ensure said compression head remains in said substantial medial location at all times so as to induce a dynamic biaxial force thereon the autogenous cancellous osteomedullary bone cylinder during ambulation on the proximal femur.