Abstract: An intramedullary fixation assembly for bone fusion includes a first member positioned at a proximal end of the intramedullary fixation assembly, where the first member includes a plurality of first and second retaining screws, and a second member positioned at a distal end of the intramedullary fixation assembly, where the second member includes a plurality of third and fourth retaining screws. The first member is slideably coupled to the second member and provides for an interference fit with the second member.

Abstract: A fixation system, including an intramedullary fixation assembly and an instrument for coupling the intramedullary fixation assembly to bones. The intramedullary fixation assembly includes a proximal screw member positioned at a proximal end of the intramedullary fixation assembly, a distal member positioned at a distal end of the intramedullary fixation assembly, where the proximal screw member is slideably coupled to the distal member and makes a fixed angle with the distal member.

Abstract: An intraosseous fixation assembly for insertion into an osteotomy includes a wedge member for creating a resultant angle in the osteotomy, where the wedge member includes a body portion and a plurality of apertures. The fixation assembly also includes a first member adapted for coupling to the body portion at a first angle and a second member adapted for coupling to the body portion at a second angle, where each of the first and the second angles is at a divergent angle with respect to the body portion. In addition, the plurality of apertures includes at least a first aperture and a second aperture, where the first aperture is adapted for receiving the first member, and the second aperture is adapted for receiving the second member.

Abstract: An intramedullary fixation assembly for bone fixation includes a first construct. The first construct includes a first tapered screw member fixated into a subchondral bone. The first tapered screw member is aligned along a first longitudinal axis and has a first head portion comprising a first aperture and a first shaft extending from the first head portion. Moreover, the first longitudinal axis of the first tapered screw member is aligned substantially parallel to an articular surface of a bone. The first construct also includes a first lag screw member aligned along a second longitudinal axis. The first lag screw member has a first bulbous portion and a second shaft extending from the first bulbous portion, wherein the first lag screw member is coupled to the first tapered screw member, and further wherein the second longitudinal axis of the first lag screw member is aligned generally along the length of the bone.

Abstract: An orthopedic fixation system includes a compression plate member, a lag screw member, and a plurality of threaded screw members for applying compression across a fracture site. The compression plate member has a generally planar body, an upper surface, and bone contacting surface. The planar body includes a plurality of through-apertures and a hinged tab member having an elongated through aperture, which is adapted to receive the lag screw member and cause the tab member to recess towards a bone divot formed in the underlying bone. The compression plate member is also adapted to receive the plurality of screw members within the through-apertures for fixably and threadably coupling the compression plate member across a fracture site. The lag screw member applies a direct compressive force across the fracture site through the deformable tab that is recessed in the bone divot.

Abstract: An intramedullary assembly for intraosseous bone fusion includes a hybrid screw member and a lag screw member. The hybrid screw member is aligned along a longitudinal axis, and includes a first shaft, a threaded portion, and a head portion having a first internal surface of a first spherical radius and a second tapered internal surface of a second radius. The first internal surface is coupled to the second internal surface to enclose a bore extending through the head portion along a bore axis. The lag screw member includes a second shaft, a bulbous portion, and a threaded portion. The lag screw member is adapted to be inserted into bore and forms an acute angle with the longitudinal axis.

Abstract: An intramedullary screw and fixation system for intraosseous bone fusion of the subtalar joint includes a lag screw member, a reamer for reaming an internal surface of each of the calcaneus and talus medullary canals, and targeting guide assembly for alignment with the subtalar joint. The lag screw member includes an elongated body, a first threaded portion at a first end and a bulbous portion at a second end. The targeting guide assembly receives a cutting blade in an elongated rod for reaming the articulating surfaces of the calcaneus and talus intramedullary canals, where the cutting blade is inserted through a percutaneous incision into the elongated rod.

Abstract: An orthopedic fixation assembly for compressing bones includes a bone anchor coupled to a washer. The bone anchor includes a shaft, where the shaft extends along a radius of curvature. The bone anchor also includes a threaded end for anchoring into bone or bone fragments. The washer includes a body and a bore extending therethrough. The washer is coupled to the bone anchor by receiving the shaft within the bore. The washer is compressed against a surface of the underlying bone causing the washer to deform and apply a compressive force on the wire body and on the bone fragments.

Abstract: An intramedullary fixation assembly for bone fusion includes an implant member positioned at a proximal end of the intramedullary fixation assembly, a lag screw member positioned at a distal end of the intramedullary fixation assembly and a circular member frictionally coupled to the lag screw member. The lag screw member is slideably coupled to the implant member and provides for an interference fit with the implant member.

Abstract: A method for applying compression to a joint includes providing an intramedullary fixation assembly having a proximal screw member positioned at a proximal end of the intramedullary fixation assembly and a lag screw member positioned at a distal end of the intramedullary fixation assembly. Medullary canals are drilled in a first and second bone and the medullary canals are reamed. The proximal screw member is inserted into the first bone and a drill is used create a dorsal hole in the first bone. The lag screw member is slideably coupled to the dorsal hole and to the proximal screw member and into the second medullary canal. A torque is applied to the lag screw member to apply compression to the joint.

Abstract: An intramedullary fixation assembly for bone fusion includes a first member positioned at a proximal end of the intramedullary fixation assembly, and a second member positioned at a distal end of the, intramedullary fixation assembly. The first member is slideably coupled to the second member and provides for an interference fit with the second member. The intramedullary fixation assembly includes an optional cannulated threaded screw member having a plurality of threads on an external surface of the threaded screw member.

Abstract: An intramedullary fixation assembly for bone fusion includes a first member positioned at a proximal end of the intramedullary fixation assembly, where the first member includes a plurality of first and second retaining screws, and a second member positioned at a distal end of the intramedullary fixation assembly, where the second member includes a plurality of third and fourth retaining screws. The first member is slideably coupled to the second member and provides for an interference fit with the second member.

Abstract: An intramedullary assembly for intraosseous bone fusion includes a lag screw member and a tapered screw member. The lag screw member includes a first elongated body, where the first elongated body includes a first threaded portion at a first end and a bulbous portion at a second end. The tapered screw member is coupled to the lag screw member, and the tapered screw member includes a second elongated body, where the second elongated body includes a second threaded portion at a third end, and an opening at a fourth end.

Abstract: A compression screw assembly includes a first primary member having a threaded leading portion of a first pitch, a smooth middle portion and a threaded trailing portion of a second pitch with the trailing portion residing directly opposite leading portion. The compression screw assembly includes a second threaded screw head member positioned at a distal end having external threads, which are of the same pitch as the plurality of threads of the leading portion, and internal threads of a fourth pitch and dissimilar screw leads from the external threads. The difference in screw leads causes the compression screw member to apply a compressive force on bone fragments when compression screw assembly is inserted into bone fragments.

Abstract: A hybrid intramedullary fixation assembly for joint stabilization is provided and includes a plate member having a plurality of apertures. The plate member includes a first elongated portion and a second curved portion. The assembly includes a plurality of metatarsal screws for coupling the plate member to the first elongated portion and to the metatarsal bone, an intramedullary screw member coupled to the first elongated portion applies compression to the tarsometarsal joint, and a plurality of medial screws coupled to the second curved portion and to the bones in the mid-foot region stabilizes the joint.

Abstract: A fixation system, including an intramedullary fixation assembly and an instrument for coupling the intramedullary fixation assembly to bones. The intramedullary fixation assembly includes a proximal screw member positioned at a proximal end of the intramedullary fixation assembly, a distal member positioned at a distal end of the intramedullary fixation assembly, where the proximal screw member is slideably coupled to the distal member and makes a fixed angle with the distal member.

Abstract: An orthopedic screw assembly including a proximal member positioned at a proximal end of the orthopedic screw assembly, a distal member positioned at a distal end of the orthopedic screw assembly, and an elongate element having a first end and a second end. The elongate element is coupled to the proximal member at the first end and coupled to the distal member at the second end. The elongate element is configured to apply a dynamic compressive force on each of the proximal member and the distal member, thereby coupling the proximal member to the distal member.

Abstract: A joint resurfacing system for repairing defects in the articular surface of bones in the foot. The system includes a hemiarthroplasty implant for the talus resulting in minimal removal of the underlying bone. The implant device comprises a first curved surface and a second curved surface, with the second curved surface coupled to an articular surface of a talus bone via a dynamic fixation device.