A bone screw, for drawing first and second bone fragments together, includes a shaft having a distal section and a proximal section. The distal section has a first external male screw thread and a minor diameter. The proximal section has a second external male screw thread. A major diameter of the distal section is larger than a major diameter of the proximal section. The bone screw includes a sleeve that has an internal female screw thread configured to mate with the second male screw thread. A distal portion of the sleeve has an outer diameter. The outer diameter is equal to or smaller than the minor diameter of the distal section of the shaft.

The present invention relates to an orthopaedic implant and system for fixation of bones and a method for the use of the orthopaedic implant and system. The orthopaedic system finds utility for fixation of bones such as fractures of the tibia, although it may be used in any suitable long bone.

In one aspect, an implant configured to attach a first bone section to a second bone section comprises an intramedullary portion and an extramedullary portion. The intramedullary portion is configured for insertion into the first bone section. The ex-tramedullary portion is configured to abut a surface of the second bone section and includes a first fastener aperture configured to eceive a bone fastener inserted in the second bone section. The intramedullary portion and the extramedullary portion are coupled such that the extramedullary portion is rotatable with respect to the intramedullary portion.

The various embodiments disclosed herein relate to bone fixation devices, including intramedullary fixation or fusion devices. The various devices disclosed include an intermedullary rod or device having a proximal and a distal portion. The proximal and distal portions having articulated ends that are coupled to form a joint. The joint may be actuated to reduce a fracture and realign the bone after insertion of the device into the bone.

Embodiments described herein provide an implant for rigid intramedullary fixation of the hindfoot complex with the midfoot and/or forefoot and methods of implanting the same. Embodiments described herein can allow for the implant to be adapted to the patient based upon the extent of bone loss and instability. Embodiments herein also provide a jig system to facilitate the shaping of the foot and/or the implantation of the described internal fixation systems.

A cortical shaft bone fixation apparatus includes a housing having a leading portion and a trailing portion, the leading portion configured to fit within a diameter of an affected cortical shaft bone, the leading portion having first and second sections. The apparatus further includes an expansion mechanism adapted to transition the first and second sections from a first position to a second position, the first and second sections providing an outward force against the inside surface of the cortical shaft bone when the first and second sections transition from the first position to the second position, the trailing portion of the housing abutting a leading end of the affected cortical shaft bone. The trailing portion of the housing includes a pair of angled tapers extending inwardly toward each other to a minimum separation distance at an extreme end of the housing.

Intramedullary rods, targeting devices, intramedullary rod systems, intramedullary rod kits, and methods of placing an intramedullary rod in a bone are described. An intramedullary rod comprises a head member having a first end, a second end, and a body extending between the first end of the head member and the second end of the head member. The head member is formed of a first material and defines a circumferential flange and a circumferential shoulder. The circumferential flange extends radially outwardly from the head member and the circumferential shoulder is disposed between the first end of the head member and the circumferential flange. A shaft member extends from the head member and a head extension is partially disposed over the head, member. The head extension is formed of a second material that is different than the first material and has an end contacting the circumferential shoulder of the head member.

An instrumentation system (100) and an intramedullary femoral nail system (1) for antegrade or retrograde implantation with laterally inserted bone screws, the system comprising a nail stem (2) having a multi-featured proximal end (3), a distal end and a central conduit (22) configured to accommodate a fastener (4), wherein the multi-featured proximal end (3) comprises a plurality of holes (20) configured to accommodate at least two bone screws (50, 52), wherein the first bone screw (50) is at an angle that is horizontal relative to the central conduit (22) and is on a coronal plane, and the second bone screw (52) is at an angle of between 120° to 130° relative to the central conduit (22).

An implant assembly for a long bone having a longitudinal axis. The implant assembly has a stem that is received in a surgically prepared medullary canal of the long bone. The stem defines at least one transverse through-opening that extends through the stem from a first portion of the outer surface of the stem to an opposed second portion of the outer surface of the stem. Each transverse through-opening has a central axis that is substantially perpendicular to the longitudinal axis of the stem. Each transverse through-opening receives a fastener and has a longitudinal dimension, measured relative to the longitudinal axis of the stem, that is sufficient to permit axial movement, relative to the longitudinal axis of the stem, of the stem relative to each fastener.

An electromagnetic intramedullary nail screw positioning system is used to assist an orthopaedic surgeon to correctly aligned a screw drill guide with a screw receiving aperture in an intramedullary nail during surgery. However due to the large number of different types of intramedullary nail, the system must be calibrated during each surgery. An improved calibration system is described that no longer requires the surgeon to perform the calibration during the surgery in order to save time and improve robustness. The system is periodically calibrated and a memory stores offset information for a range of nails types relative to a reference nail. During surgery, the surgeon enters a nail identifier, and the system looks up the associated offset and applies this offset to the measured signals to guide alignment of the screw drill guide with the screw receiving aperture.