Abstract: A method for computer assisted localization of the distal locking holes (11; 14) of an implanted intramedullary nail (2) having a nail axis (19) and a first and second distal locking hole (11; 14) by A) acquiring one single image IM of the distal end section (25) of said intramedullary nail by means of an X-ray device (9) whose optical axis (30) is oriented essentially perpendicular to the nail axis (19) but irrespective to the orientation of the distal locking holes (11; 14); and B) calculating the position of the first and second hole axis (23; 20) of the first and second distal locking hole (11; 14) with respect to a three-dimensional coordinate system A-COS (7) of the implanted intramedullary nail (2).

Abstract: A straight intramedullary bone fracture fixation device is provided with an elongate body having a longitudinal axis for deployment in a long bone, such as a clavicle. Methods of repairing a fracture of a bone are also disclosed. One such method comprises inserting a bone fixation device into an intramedullary space of the bone to place at least a portion of an elongate body of the fixation device on one side of the fracture and at least a portion of a hub on another side of the fracture, and engaging an inner surface of the intramedullary space to anchor the fixation device to the bone. Various configurations and designs may be used in combination with other fixation device components.

Abstract: The present invention discloses a system for securing at least one elongate fastener to an implant. At least one adhesive capsule is inserted in a recess preferably located along a longitudinal axis of the implant. The at least one adhesive capsule may be inserted in the recess and held in place therein by a holder. A plurality of adhesive capsules and holders may be inserted in one or more recesses located substantially along the longitudinal axis of the implant. The at least one adhesive capsule preferably has a casing housing an adhesive material configured to be pierced by the at least one fastener to secure the at least one fastener to an aperture of the implant. The casing of the adhesive capsule may form an annular passageway to receive a guide wire for aiding the insertion of the capsule in an implant having a longitudinal bore along at least a portion thereof.

Abstract: A system is proposed including an intramedullary nail with a longitudinal nail axis, a first lateral portion, a second lateral portion opposite to the first lateral portion, and a longitudinal bore. The nail has a locking hole arrangement having a first bore being formed in the first lateral portion and a second bore being formed in the second lateral portion. An axis of the first bore and an axis of the second bore are arranged with an offset from each other, and are arranged so that a locking member such as a screw may frictionally engage within both the first bore and the second bore.

Abstract: A system for fixing a fracture near a joint of a bone comprises (a) an intramedullary device including a longitudinal body and a head, the longitudinal body extending from a proximal end to a distal end, the head being attached to the proximal end of the longitudinal body; and (b) a plate implantable into a head portion of the bone to provide support to a joint zone, the plate engageable with the intramedullary device. The plate is substantially U-shaped and includes a midsection and a pair of arms extending from the midsection, the pair of arms forming a space therebetween, the space sized and shaped to accommodate the head of the intramedullary device.

Abstract: A device is provided for insertion into a human bone to replicate the biomechanical forces found in a healthy bone in a human skeleton. The device can be configured in several different ways and is customizable to meet the requirements of a particular bone. The device is constructed with a central shaft having a compression plate at one end and a base member at the other. A plurality of wires interconnects the compression plate and the base member. The central shaft is threaded at both ends, with one end threaded into the base member and the other end threaded into the compression plate. An actuator is used to urge the base member in the direction of the compression plate. This action forces the plurality of wires to bow in an outward direction to stabilize the device against the bony surface on the interior surface of a bone.

Abstract: An apparatus for treating a bone comprises an implant to be received within the bone, including a plurality of bores extending therethrough and a cavity formed therewithin, each of the bores being dimensioned to receive a bone fixation element and a plurality of inserts receivable in the cavity. Each insert includes an opening extending therethrough and configured to align with a corresponding bore. Each insert is movable between a resting configuration in which an opening width is smaller than a width of a bone fixation element inserted therethrough and a stressed configuration in which the opening width is expanded to a width greater than that of the bone fixation element in combination with a compression member movable into the cavity to apply a force moving the inserts from the resting configuration to the stressed configuration, withdrawal thereof reducing the force and permitting a return to the resting configuration.

Abstract: A fixation device for an intramedullary nail for proximal femoral fractures, including a main intramedullary nail, a combined locking nail, and cortical bone screws. The main intramedullary nail has a longitudinal axis, a proximal end, and a distal end with a tip. The proximal end includes a through hole for assembling the combined locking nail. The distal end includes an oblong through hole and a circular through hole, both for receiving the cortical bone screws. The combined locking nail includes a head, a distal end of the locking nail, a sleeve, a connecting block, and a cover cap. The connecting block includes a left-handed external thread. The cover cap includes a left-handed internal thread matching with the external thread of the connecting block, a symmetrical sliding plane, and a protrusion block disposed at the end of the symmetrical sliding plane.

Abstract: A bone screw is provided, with a thread section (2) of tubular construction having a tip (3) at its first end and a second end opposite the latter. The tubular thread section (2) comprises a bone thread (22) on its outer wall, and the wall of the thread section (2) comprises a plurality of recesses (21). The bone screw further includes a holding element (4, 6) with a first section (41, 61) for connection to the thread section (2) and with a rod-like second section (43, 63) which in the inserted state of the holding element (4, 6) protrudes beyond the second end of the thread section (2). A stop is provided for limiting the distance of insertion of the holding element (4, 6) in the thread section (2). The holding element (4, 6) comprises an element (44, 64) at its free end for engagement with a screw-in tool.

Abstract: Intramedullary osteosynthesis device is capable of adopting a profiled H-shape in a closed introductory state in order to be easily implantable and an X-shape in an open implanted state for good fixation in the bone.

Abstract: This insertion and locking device (1) for an implant in a long bone comprises an elongate body (2) designed to be received in a medullary canal of the long bone, the body defining, in a first position called the insertion position, a first transverse size and, in a second position called the locking position, a second transverse size greater than the first transverse size. This device furthermore comprises drive mechanism (8) suited to enable the body (2) to move from the first position to the second position. In addition, the elongate body (2) comprises a central member (3) defining a main axis and at least one locking member (6) defining at least one axis of movement distinct from the main axis, the or each locking member (6) being suited to anchoring itself in the long bone under the effect of the drive mechanism.

Abstract: An intramedullary pin for insertion into the medullary space of the femur through the lateral compacta of the trochanter major. The pin has a proximal pin section and an adjoining distal pin section. Each pin section includes one or more bores for one or more bone screws. The proximal pin section has at least one bore running obliquely to the longitudinal axis, so that bone screws can be inserted through the bore into the head of the femur, or a screw can be inserted in the antegrade direction through the bore. The distal pin section is at least partly straight and the proximal pin section has a curvature in the lateral-posterior direction.

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: The invention concerns an intramedullary nail to be inserted into a fractured long bone, for example a femur, comprising: a rod (2) extending between a proximal part (3) and a distal part (4); a tubular sleeve (5) into which said rod (2) is inserted coaxially; at least a first pair of expansion means (12) located in the distal part (4) of said rod (2), said expansion means (12) being made of a shape-memory material in order to assume a first configuration of rest in which they are disposed inside recesses in the lateral wall of the nail (1), and a second configuration of use in which said means (12) are located projecting from the lateral wall of the nail (1); slots (55) are present on the tubular sleeve (5) in correspondence with the shape-memory means (12) to allow for the fastening onto the bone when the means assume said second configuration of use; where said rod (2) comprises in correspondence with the proximal end (3) a transversal channel (6) for the passage of a stop screw (S), said tubular sleeve (5

Abstract: A femur fixation device including an elongated nail configured for insertion into the medullary canal of the femur and a buttress element extending from the elongated nail. The buttress element is configured to reinforce the lesser trochanter region of the femur and assist in stabilizing the head portion of the femur.

Abstract: This invention is related to the radius intramedullar locking nail which provides fusion by fixing the bone in case of single or multiple fractures of radius bone, which fixes the distal end of the nail with a locking screw (5) and the other end of it with the bayonet end of the elastic nail (3) by applying it through the medulla of radius bone and by taking the broken bone part in the middle; and its feature is characterized by consisting of that radius intramedullar elastic nail (1), locking distal hole (2), the bayonet end of the elastic nail (3), anatomic curves of the elastic nail (4), locking, conical headed cortical bone screw (5), holed oval head of the elastic radius nail (6), inserter of the elastic radius nail (7), on-off button of the inserter (8) and the impacter of the inserter (9).

Abstract: A method of stabilizing a fractured bone includes: a) providing a first support member in a medullary canal of a fractured bone; b) providing a second support member outside the fractured bone; c) providing a transverse connector adapted to link the first support member to the second support member in an angle-stable connection; d) connecting the transverse connector to the first and second support members in an angle-stable connection; e) providing one or more bone screws adapted to be connected to the second support member in an angle-stable connection; and f) implanting the bone screws such that the shank of the screw is implanted in the fractured bone while the head of the screw is connected to the second support member in an angle-stable connection. The system provides superior fixation of long bones that allows for early functional range of motion without loss of alignment or fixation.

Abstract: An intramedullary nail (20) defining a bore (34) is inserted into a medullary canal (26) of a bone (24). A threaded fastener (22) has a compression portion (48) presenting a compression portion diameter (DCP) and a threaded portion (50) presenting a threaded portion diameter (DTP). The fastener (22) extends through a near cortex hole (40) and/or a far cortex hole (42), and the threaded portion (22) threadedly engages the bore (34). A compression transmission device (54) is disposed between a head (44) of the fastener (22) and the intramedullary nail (20) for transmitting the compressional load of the threaded fastener (22) to the intramedullary nail (20). An interior space of the compression transmission device (54) is greater than the compression portion diameter (DCP) providing space about the threaded fastener (22) for allowing the fastener axis (A) to be variously disposed relative to the interior space.

Abstract: An intramedullary osteosynthetic device includes an intramedullary nail, a hip helical implant, a sliding sleeve, a lateral set screw, and a distal locking screw. The intramedullary nail includes an oblique slotted bore that receives the sliding sleeve and in communication with a cannulation that is partially threaded to receive a coaxial set screw and a threaded notch compatible with the lateral set screw. The hip helical implant includes a frontal helical portion, at least two helical twisted blades attached to the frontal helical portion, and a rear smooth shaft having an external flat surface. The sliding sleeve includes a tube having an internal flat corresponding to the external flat and has external threads at the rear of the sleeve engaging the lateral set screw. The coaxial set screw fixes the sliding sleeve to the intramedullary nail by tightening the sliding sleeve inside the oblique bore.

Abstract: An implantable intramedullary fixation structure adapted to be received in the intramedullary canal of a long bone is disclosed comprising a plurality of elongated segments. Each segment has a first end and a complementarily-shaped second end such that the first end of a segment cooperatively engages the second end of an adjacent segment. The segments define a guide aperture so as to be receivable over a guide for positioning in the intramedullary canal.

Abstract: Embodiments of the invention provide intramedullary nail assemblies that provide particularly good internal fixation, are particularly easy to deploy, or both. Embodiments also provide methods of using such nail assemblies.

Abstract: The nail is inserted into the interior of a long tubular bone. It has a plurality of elongate segments joined to the leading end of its tubular sheath. When the segments are urged through a segment guiding device that is positioned at the leading end of the sheath, the segments with their sharpened bone penetrating distal ends exit in a radial distal direction causing them to lock into the surrounding bone. During the distal translation of the sheath and the elongate segments, the segment guiding means is maintained in a fixed position relative to the surrounding bone by the centrally placed shaft of a setting tool.

Abstract: An intramedullary fixation device having a distal section; a proximal section; a connecting member for adjustably securing the distal and proximal sections end to end along a longitudinal axis; a screw securing the proximal section to a first bone; and a screw securing the distal section to a least one different bone. The connecting member is rotated to provide compression across a bone arthrodesis site to be stabilized and fused. Also described is a method of utilizing the intramedullary fixation device with an outrigger assembly.

Abstract: An intramedullary pin for insertion into the medullary space of the femur through the lateral compacta of the trochanter major. The pin has a proximal pin section and an adjoining distal pin section. Each pin section includes one or more bores for one or more bone screws. The proximal pin section has at least one bore running obliquely to the longitudinal axis, so that bone screws can be inserted through the bore into the head of the femur, or a screw can be inserted in the antegrade direction through the bore. The distal pin section is at least partly straight and the proximal pin section has a curvature in the lateral-posterior direction.

Abstract: A compression transmission collar apparatus (20) for implantation into a bone (22) with a hole (28) having a hole wall (32) comprising an intramedullary nail (34) defining a bore (40) and a threaded fastener (42) and a compression transmission collar (58) including an exterior face (64) and a top edge (60) and a bottom edge (62) and a first end (70) intersecting the top edge (60) at an acute angle (?1) and the bottom edge (62) at an obtuse angle (?2) and a second end (72) intersecting the top edge (60) at an obtuse angle ?2) and the bottom edge (62) at an acute angle ?1) and the first end (70) partially overlapping and opposing the second end (72) to define a slit (74) such that applying a compressional load to the top edge (60) causes the first end (70) to slide relative to and along the second end (72) causing the compression transmission collar (58) to compress axially and expand radially pressing the exterior face (64) against the hole wall (32).

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: The invention relates to an intramedullary nail (1) having a proximal half (2), a distal half (3) adapted for insertion into the medullary canal, and a central axis (4), whereby the distal half (3) includes three transverse bores (5, 6, 7) suitable for receiving locking screws (10). The distal half (3) is provided with a proximal transverse bore (5) having a bore axis (15), a central transverse bore (6) having a bore axis (16), and a distal transverse bore (7) having a bore axis (17) spaced along the central axis (4). The bore axis (16) of the central transverse bore (6), which extends between the proximal transverse bore (5) and the distal transverse bore (7), is spaced at a shortest distance “a” from the bore axis (15) of the proximal transverse bore (5), and at a shortest distance “b” from the bore axis (17) of the distal transverse bore (7), where a?b.

Abstract: The intramedullary nail has a longitudinal axis, a proximal end, a distal end, at least one hole that extends transversely to the longitudinal axis and is situated in a plane with a defined diameter to accommodate a locking element, as well as a longitudinal slot extending in the plane parallel to the longitudinal axis. In the unexpanded state of the intramedullary nail the longitudinal slot has a width b, measured perpendicularly to the plane in the region outside of the holes, said slot being maximum 0.6 times that of the smallest defined diameter of the holes.

Abstract: An orthopedic device can include an intramedullary nail and an insert telescopically received in the intramedullary nail. The insert includes at least two guiding bores for corresponding bone fasteners that can be locked at an angle to the intramedullary nail. A locking set screw can be coupled to the insert and move the insert to a position that locks the bone fasteners to the nail.

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: Systems, devices and methods are disclosed for treating fractures. The systems, devices and methods may include one or both of an implant, such as an intramedullary nail, and a fastening assembly, such as a lag screw and compression screw assembly. The implant in some embodiments has a proximal section with a transverse aperture and a cross-section that may be shaped to more accurately conform to the anatomical shape of cortical bone and to provide additional strength and robustness in its lateral portions, preferably without requiring significant additional material. The fastening assembly may be received to slide, in a controlled way, in the transverse aperture of the implant. In some embodiments, the engaging member and the compression device are configured so that the compression device interacts with a portion of the implant and a portion of the engaging member to enable controlled movement between the first and second bone fragments.

Abstract: Systems, devices and methods are disclosed for limiting compression of a fracture imposed by a lag screw of a fixation system that includes a fixation device, a lag screw and a compression screw. The disclosed devices, systems and methods prevent over-compression of a fracture by a lag screw caused by over rotation of the compression screw. Specifically, implementations of a lag screw driver and a compression screw driver are provided whereby an engagement between the lag screw driver and compression screw driver prevents any further lateral movement of the lag screw, thereby providing a complete stop to further advancement of the lag screw and any additional compression.

Abstract: An orthopedic nail (10) of generally rod-like shape having a through hole (2) extending from a first side (4) to a second side (6) of said orthopedic nail (10) and being adapted to receive a screw (22) and/or a pin, a first end of said through hole (2) at said first side (4) defining a rim region (48), wherein at least one surface notch (8; 26) is provided in said rim region (48) at and restricted to an outer circumferential surface of said orthopaedic nail (10), said surface notch (8; 26) being arranged transverse to a nail axis (28) of said orthopedic nail (10), a width (W) of said surface notch (8; 26) in the direction of said nail axis (28) being smaller than a diameter of said through hole (2).

Abstract: An intramedullary nail (20) for insertion into the medullary canal (26) in a bone (24) surrounded by the cortex (28) and defines a bore (34) extending transverse to the intramedullary nail (20). A threaded fastener (22) extends along a fastener axis (A) and has a compression portion (48) having a compression portion diameter (DCP), and a threaded portion (50) having a threaded portion diameter (DTP) extending through a near cortex hole (40) and a far cortex hole (42), both holes (40, 42) radially overlapping the bore (34) and the threaded portion diameter (DTP) threadedly engaging the bore (34). A compression transmission device (54) has an exterior (56) and an interior (58) and defines an interior space for transmitting the compressional load of the threaded fastener (22) to the intramedullary nail (20).

Abstract: Apparatus and methods for bone fracture repair. The apparatus may include a structural support for positioning a first bone segment relative to a second bone segment. The apparatus may include an anchoring substrate. The anchoring substrate may be configured to compress the first bone segment to the second bone segment. The anchoring substrate may transmit tension from a distal bone segment anchor in the first bone segment to a proximal bone segment anchor in the second bone segment. The apparatus may be configured to be deployed percutaneously in an inner cavity of a bone. The apparatus may be installed in an open fracture. The apparatus may be expanded, self-expanding or configured for mechanically actuation. Some embodiments of the apparatus may include a central axis member that may be used in conjunction with expansion of one or both of the structural support and the anchoring substrate to configure the apparatus.

Abstract: A bone fixation device is provided with an elongate body having a longitudinal axis and having a first state in which at least a portion of the body is flexible and a second state in which the body is generally rigid, an actuateable gripper disposed at one or more locations on the elongated body, a hub located on a proximal end of the elongated body, and an actuator operably connected to the gripper(s) to deploy the gripper(s) from a retracted configuration to an expanded configuration. Methods of repairing a fracture of a bone are also disclosed. One such method comprises inserting a bone fixation device into an intramedullary space of the bone to place at least a portion of an elongate body of the fixation device in a flexible state on one side of the fracture and at least a portion of a hub on another side of the fracture, and operating an actuator to deploy at least one gripper of the fixation device to engage an inner surface of the intramedullary space to anchor the fixation device to the bone.

Abstract: A device for measuring a degree of bending of an intramedullary nail comprises a probe sized and shaped for insertion into a cannulation of an intramedullary nail. The probe including a first longitudinal element extending along a longitudinal axis from a distal end to a proximal end and a second longitudinal element extending along a longitudinal axis from a distal end to a proximal end, the distal ends of the first and second longitudinal elements attached to one another so that the longitudinal axes of the first and second longitudinal elements extend substantially parallel to each other and define a middle plane. A measuring element measures relative axial displacement of the proximal ends of the first and second longitudinal elements in the middle plane upon bending of the first and second longitudinal elements as the probe is inserted into a cannulation of the intramedullary nail.

Abstract: An intramedullary nail, particular for use with a tibia, may have a proximal end part, a distal end part adapted to be introduced into a medullary space, and a central section. The central section includes a first curved section having a first length with a first radius of curvature, and a second curved section having a second length shorter than the first length and a second radius of curvature smaller than the first radius of curvature. The second radius of curvature may be less than the first radius of curvature. The intramedullary nail also includes a central axis. Tangents at two end points of the central section, including the first and second curved sections, enclose an angle gamma between about 9° and about 12°. The intramedullary nail may have a total length ranging from 200 to 500 mm.

Abstract: An intramedullary nail extending from a proximal end to a distal end comprises a distal portion extending longitudinally from the distal end to a first connecting end and including a first locking hole extending therethrough; a proximal end extending longitudinally from a second connecting end to the proximal end of the nail and including a second locking hole extending transversely therethrough and a joint connecting the first and second connecting ends such that the distal and proximal portions are rotatable relative to one another about the joint.

Abstract: An implant for osteosynthesis, for example a bone nail, has an implant body which has at least one bore with a threaded portion and a bone screw which engages the thread when it is threaded into a bone for the fixation of the implant body. The threaded bore has an annular groove the diameter of which is larger than the thread outer diameter, and which receives a ring of a deformable material with an inner diameter which is smaller than the outer diameter of the thread of the bone screw so that the ring extends partially into the bore.

Abstract: A system and method are for bone fixation. A radially expandable sleeve is inserted over an elongated shaft of a bone screw. The bone screw and radially expandable sleeve are inserted into a transverse opening extending through a bone fixation device positioned in a bone until the radially expandable sleeve is fully housed within the transverse opening. The bone screw is further screwed into the bone relative to the radially expandable sleeve to cause expansion of the radially expandable sleeve within the bone fixation device, thereby locking the sleeve to the bone fixation device.

Abstract: An orthopedic device is provided. The orthopedic device can include an intramedullary implant defining a longitudinal bore along a longitudinal axis. The intramedullary implant can define at least one bore formed along an axis for receipt of a fastener. The orthopedic device can include a fixation device receivable within the longitudinal bore. The fixation device can have at least one guiding bore formed along a guiding axis transverse to the longitudinal axis. The orthopedic device can include at least one collet received within the at least one guiding bore for positioning and locking the fastener at a variable angle relative to the guiding axis of the fixation device and the axis of the intramedullary implant.

Abstract: A device for bone fixation comprises a bone fixation nail extending from a proximal end to a distal end, the distal end having a helical structure configured to engage a bone, the proximal end having an opening extending thereinto and a first sleeve configured for insertion over a proximal portion of the bone fixation nail and through an intramedullary nail hole, the first sleeve permitting the bone fixation nail to move axially therewithin within a predetermined range of movement along with a locking screw configured to limit movement of the bone fixation nail relative to the first sleeve, the locking screw configured to lockingly engage the opening in the bone fixation nail and having a head and a threaded shaft extending distally therefrom.

Abstract: An intramedullary implant, useful particularly for the fixation of fractures of the radius, the implant comprising a first and second end, both ends configured for entry into the intramedullary canal through an entry point on the bone, such as the fracture site, and configured for positioning within the intramedullary canal of the fractured bone, the first end positioned in the intramedullary space of a first bone fragment and the second end positioned in the intramedullary space of a second bone fragment on the opposite side of the fracture. The first end is positioned by displacing the implant in a first direction and the second end is positioned by displacing the implant in a second direction, substantially opposite to the first direction. The implant further comprises a tip configured to abut an end surface of the second fragment to provide axial support to second fragment.

Abstract: The intramedullary fixation device for use in fixing the relative position between a tubular bone and an adjoining bone has, according to the present invention, an intramedullary nail that is inserted into the medullary canal of the tubular bone whose position is to be fixed, an elongated blade for insertion into the adjoining bone whose position is to be fixed relative to that of the tubular bone, a coupling element for fixing and locking the relative position of the nail and blade after their insertion, and a means for locating and positioning within the bones to-be-treated the nail and blade. Furthermore, the blade has a cross-sectional shape that is configured in consideration of the geometry of the bone into which the blade is to-be-placed and so as to enhance the ability of the blade to stabilize the bone, and these elements are configured so that they do not have to be decouple during the process of inserting the nail and blade.

Abstract: An intramedullary bone repair system and device for insertion into a bone extending along a longitudinal axis of the bone and for use with a plurality of screws. The bone repair device includes an elongate shaft and a head pivotally coupled to the proximal end of the shaft. A locking assembly is carried by the proximal end of the shaft and the head for rigidly coupling the shaft and the head together when the shaft and the head have been desirably positioned within the bone. The shaft and the head are provided with a plurality of threaded bores for receiving the plurality of screws to affix the shaft and head within the bone. A method for repair of a bone fracture using the bone repair device is also disclosed.

Abstract: A fixation instrument for treating a bone fracture including a bone screw and a nail, wherein the bone screw extends through an opening in the head or proximal end of the nail. A movable insert is disposed within a chamber located at the proximal end of the nail. The insert engages the bone screw to prevent rotation thereof once the bone screw is placed in position.

Abstract: An apparatus for treating a fracture of a bone of a subject includes an intramedullary (IM) nail insertable into a medullary canal of the bone of the subject. The IM nail has a proximal head that defines at least one hole therethrough. A sleeve, which includes a locking mechanism, is engaged with the hole when the sleeve is inserted in the hole. This engagement prevents rotational movement between the sleeve and the nail and inward and outward longitudinal movement of the sleeve relative to the nail.

Abstract: Treating fractures using one or both of an implant, such as an intramedullary nail, and a fastening assembly, such as a lag screw and compression screw assembly. The implant in some implementations has a proximal section with a transverse aperture having a non-circular cross-section that may be shaped to selectively constrain the fastening assembly within the transverse aperture. Two or more components of the fastening assembly may be received to slide, in a controlled way, in the transverse aperture of the implant, and to cooperate to resist a force moment applied thereto.

Abstract: A bone stabilizing apparatus includes a stem member and an extension member, the stem member having a distal end for insertion within the intramedullary canal of a human humerus and the proximal end connected to the extension member. The extension member has radially directed threaded holes either pre-formed or created after the bone stabilizing apparatus is installed into the humerus. The threaded holes allow fixation of stabilizing screws with suture posts, or a washer structure to grip the surface of the bone and/or surrounding ligaments or muscle. A prosthetic or the natural humeral head can be attached to the extension member. In a preferred embodiment a guide structure directs the drill and stabilizing screws radially through the central axis of the extension member.