A device is provided. The device includes an external screw includes a first channel extending along a longitudinal axis, and the first channel including a first inner side including at least one protrusion; and an internal screw includes a first pushing rod section including a first threaded section and at least one groove, the at least one groove is configured to accommodate the at least one protrusion of the first inner side, and the first pushing rod section is configured to slide within the first channel along the longitudinal axis.

Devices, methods and systems for remedying or preventing fractures of the bone are disclosed. The devices, and corresponding methods and systems, may include first and second members each having a proximal end, a distal end and a middle portion and an outer surface. The first member may be configured to be positioned at least partially within the femoral neck of the femur. The second member may be configured to be oriented at an oblique angle relative to the first member and mechanically engaged with the first member through an interlocking connection between the distal end of the second member and the middle portion or the distal end of the first member.

A bone plate for treating periprosthetic fractures includes a head portion sized and shaped so that, in an operative position, a proximal end thereof aligns with a vastus ridge of a greater trochanter of a femur. The plate also includes a shaft portion extending distally from the head portion. The shaft portion includes offset holes to receive bone fixation elements therethrough. Each of the offset holes includes a first hole positioned on a first side of a longitudinal axis of the plate and a second hole positioned on a second side of the longitudinal axis opposite the first side so that bone fixation elements inserted therethrough extend anterior and posterior of a prosthetic received within the femur. The first and second holes are staggered relative to one another along a length of the shaft portion and extending beyond longitudinal edges of the shaft portion.

A bone plate for treating periprosthetic fractures includes a head portion to be positioned along a greater trochanter of a bone. The head portion includes pairs of bone fixation element receiving openings extending therethrough from a first surface of the plate which, when the plate is in an operative position, faces away from the bone, and a second surface which, when the plate is in the operative position, faces toward the bone. A pair of cable holes extend through the head portion from a first longitudinal side connecting the first and second surfaces to a second longitudinal side connecting the first and second surfaces. The head portion includes a pair of hooks for engaging a superior ridge of the greater trochanter. The plate also includes a shaft portion extending distally from the head portion to extend along a portion of the bone distal of the greater trochanter.

An implant system includes a fixation device that, in turn can include an expandable implant alone or in combination with an auxiliary implant. The expandable implant includes an expandable implant body that is made from an expandable material. The expandable material includes a polymer matrix and an expandable gas source contained within at least a portion of the polymer matrix. The implant system can further include an energy source configured to heat the polymer matrix to a temperature above its glass transition temperature, thereby causing the gas source to expand inside the polymer matrix. The fixation device can further include an insertion instrument configured to implant the fixation device into an anatomical cavity.

An anchorage in tissue is produced by holding a vibrating element and a counter element against each other such that their contact faces are in contact with each other, wherein at least one of the contact faces includes a thermoplastic material which is liquefiable by mechanical vibration. While holding and then moving the two elements against each other, the vibrating element is vibrated and due to the vibration the thermoplastic material is liquefied between the contact faces, and due to the relative movement is made to flow from between the contact faces and to penetrate tissue located adjacent to outer edges of the contact faces. For liquefaction of the thermoplastic material and for displacing it from between the contact faces, no force needs to act on the tissue surface which is to be penetrated by the liquefied material.

A method of reinforcing a femoral neck comprises creating a bore proximate to at least one of a Ward's triangle and a greater trochanter, creating at least one cavity in a cancellous bone region of the femoral neck, inserting a substantially collapsed support structure through the bore and into the at least one cavity, expanding the support structure, and allowing at least a portion of the load from the femoral neck bone to be transferred to the support structure. The support structure compresses at least a portion of the cancellous bone upon expansion. A cavity created by the expansion is adapted to receive a filler material such as, but not limited to, bone cement.

An intertrochanteric fracture fixation device. The device comprises an anterior an anterior right lateral quadrangular shaft, a posterior quadrangular shaft, an anterior left medial hemi quadrangular shaft, a plurality of screws and a plurality of rods. The vertical arm of anterior right lateral quadrangular shaft enters into the vertical arm of the posterior quadrangular shaft and the horizontal arm of the anterior left quadrangular shaft is inserted into the horizontal arm of the posterior quadrangular shaft. A plurality of spikes is present on both the combined parts of the device. The distance between each spike is 20 mm. The three shafts i.e. anterior right lateral quadrangular shaft, a posterior quadrangular shaft and an anterior left medial hemi quadrangular shaft are combined and fixed to the proximal part of the fractured site. Again the three shafts are combined and fixed to the distal part of the fractured site of the bone.

An engineered medical device for treatment of osteonecrosis is provided where the size, porosity and ceramic content of the device can be personalized based on an individual patient's anatomical and physiological condition. The device distinguishes different segments mimicking anatomically-relevant cortical and cancellous segments, in which the cortical segments of the device can sustain mechanical loading, and the cancellous segment of the device can promote bone ingrowth, osteogenesis and angiogenesis.

A screw device for compressing and fixing together a proximal and distal bone part along a surgical axis comprising: a bone screw portion comprising an elongate body inscribed with bone screw threads at a leading end of an outer surface of said body; an elongate tubular torque stabilizer portion for spanning said bone parts and comprising one or more torsion stops to engage each bone part to limit rotational movement between the bone parts and a translation stop on said torque stabilizer to seat against a portion of the proximal bone to limit translation of said torque stabilizer portion along the surgical axis; and a compressor lock portion engaging the bone screw portion and torque stabilizer portion to draw said bone screw portion proximally along the surgical axis toward said translation stop therein compressing said bone parts together.