Intramedullary nails, systems, and methods. The intramedullary nail may include a generally elongate body extending from a first, distal end to a second, proximal end. The distal end may include one or more openings configured to receive one or more bone anchors that extend transversely through the distal end intramedullary nail, and thereby configured to secure the distal end of the nail. The proximal end may also include one or more openings configured to receive one or more bone anchors that extend transversely through the proximal end of the intramedullary nail, and thereby configured to secure the proximal end of the nail. In some embodiments, the proximal end may further include a cross-locking feature, which includes a second bone anchor that interlocks with a first bone anchor, for example, for enhanced bone purchase and bony fixation.

The present disclosure provides a treatment tool cable of satisfactorily treating long tubular bone fractures, such as femoral trochanteric fractures and subtrochanteric fractures. The treatment tool comprises an elastic plate 2 that has a curved shape or that can be curved, the plate comprising at least one pressing portion 20 that is provided at one end in the width direction of the plate and that presses the trochanter 103 of the femur 100 from the posterior side by a restoring force that is generated by deformation of widening the curvature.

A bone fixation system includes an intramedullary nail and a lag screw. A proximal portion of the intramedullary nail includes a first proximal bore configured to accept the lag screw and a second proximal bore configured to accept a portion of an antirotation screw insertion tool. A distal portion of the intramedullary nail defines at least one opening configured to accept a distal locking screw. The lag screw includes a sheath and a rod mounted for sliding movement within the sheath. The rod has a threaded distal end defining a diagonal bore configured to accept an antirotation screw.

A method of implanting a medical implant includes resecting a long bone along a shaft of the bone so as to form a resected surface and remove a metaphysis of the bone. A tapered bore is reamed through the resected surface of the long bone and into an intramedullary canal thereof. A tapered portion of a stem of a medical implant is fully seated within the tapered bore so as to form a press-fit between the tapered portion of the stem and the long bone and so that a collar disposed at an end of the stem is offset from the resected surface so as to form a gap between the resected surface and the collar.

A proximal portion of an implant for repairing a multipart fracture of a proximal humerus includes an asymmetric body having a proximal end, a distal end, a medial side, a lateral side, an anterior edge, and a posterior edge a medial surface extending along at least a portion of the medial side and having a proximal end and a distal end; a protrusion forming the lateral side of the asymmetric body, offset in an anterior direction, and pointing toward a bicipital groove of the humerus when the proximal portion is implanted in the humerus, an anterior support surface configured to support a lesser tuberosity; a posterior support surface configured to support a greater tuberosity; an angled surface having a first side defined by the medial surface, a second side defined by the anterior support surface, and a third side defined by the posterior support surface; and an anchoring point.

A hip/shoulder prosthesis includes: a head component; a metaphyseal component; a diaphyseal nail, and a locking device. The head component includes: a front face and rear face; with a bore, and first and second shaped recesses in the rear face. The metaphyseal component includes: a central transverse aperture at an angle to the metaphyseal component's axis; a first end configured for threaded engagement within the bore of the head component; and a longitudinal hole that begins at the second end, transects the transverse aperture and reaches the first end, to receive the locking device. The diaphyseal nail is inserted in the femoral or humeral canal, and includes: fastening apertures that receive corresponding screws for fastening the diaphyseal nail to the femur or humerus; a portion configured to be received within, and engage, the transverse aperture of the metaphyseal component, and a transverse hole configured to receive the locking device.

Embodiments are directed to an orthopedic nail that includes a shaft extending from a first end to a second end and defining one or more openings positioned proximate to the first end. Each opening can accept an orthopedic screw. The shaft can also define a first retention feature positioned proximate to the second end. The orthopedic nail can include a collar that couples to the shaft and defines one or more openings each configured to accept an orthopedic screw. The collar can define a second retention feature that engages with the first retention feature, where the first and second retention features allow the collar to be rotated with respect to the shaft and prevent the collar from decoupling from the shaft. The orthopedic nail can include a lock coupled to the collar and configured to engage with the shaft to prevent rotation of the collar with respect to the shaft.

A computer assisted surgical system that includes an apparatus for imaging a region of interest of a portion of an anatomy of a subject; a memory containing executable instructions; and a processor programmed using the instructions to receive two or more two-dimensional images of the region of interest taken at different angles from the apparatus and process the two or more two-dimensional images to produce three dimensional information associated with the region of interest.

In one embodiment, an intramedullary nail has a body that includes proximal and distal ends and an inner surface that defines at least one locking hole that extends into an outer surface of the body so as to receive a bone anchor to lock the nail in a medullary canal of a bone. The body has a first biocompatible material that defines at least a portion of the outer surface. The nail has a second material that is different from, and at least partially encapsulated in, the first material. The second material can produce at least one of an electrical current and a magnetic field, and is supported by the nail body such that a position of the at least one bone-anchor locking hole can be detected based on the at least one of the electrical current and the magnetic field.

An orthopedic implant assembly includes a bone plate configured to couple the implant assembly to a fractured bone. A piezoelectric component is disposed on the bone plate and configured to produce an electrical output corresponding to a load the piezoelectric component is subjected to. When the implant is in contact with the fractured bone the electrical output is transmitted to the fractured bone.