109 results about "Proximal humerus" patented technology

A method for implanting an intra-articular shoulder prosthesis is provided. The method includes removing a proximal portion of a humerus. The proximal portion of the humerus preferably forms a resected portion. The resected portion has a convex outer surface and an inner surface. The method further includes engaging the convex outer surface of the resected portion with a cut surface of the proximal portion of the humerus. The cut surface of the proximal portion of the humerus and/or the inner surface of the resected portion are optionally processed to form a generally concave surface, such as by impacting. In one embodiment, the inner surface of the resected portion is impacted into engagement with the cut surface of the proximal portion of the humerus. The generally concave inner surface of the resected portion forms a concave articular surface to receive an interpositional implant.

A bone plate for fixation of proximal humerus fractures comprises an elongated shaft portion having a first width and a head portion connected to the shaft portion having a second width greater than the first width. The head portion and the shaft portion define a common longitudinal axis. At least one first screw hole may be located in the head portion, and at least one second screw hole may be located in the shaft portion. At least one of the first and second holes is configured to engage a head of a bone screw to form an angularly stable connection with the bone screw.

An apparatus and method for repairing osseous defects in such bones as the humerus, femur, ulna and long bones. A first embodiment presents one or more cannulated screws affixed to an intramedullary nail, which is installed in a humerus having an intraosseous void. In a second embodiment, one or more cannulated screws alone are inserted into a proximal humerus having an intraosseous void. Other embodiments teach one or more cannulated screws inserted into a damaged femur and attached to a plate or medullary rod. Another embodiment presents a number of cannulated screws used to attach a plate to a fractured long bone. In a final embodiment, a cannulated screw is installed in damaged ulna. In all embodiments, a bioresorbable or non-bioresorbable cement is injected into a hollow channel of the cannulated screw and extruded into the bone to stabilize the weakened bone and secure the position of a fixation device.

The present invention relates to a nail and screw system (1) for improving the fixation of proximal fractures of the humerus, including at least a Numeral nail (10) to be inserted in a Numeral shaft (9) and comprising at least a proximal transversal hole (5) for the passage of a corresponding locking screw (3), the screw (3) having a screw head (4) and a screw body (31). Advantageously, the nail is cannulated and the transversal hole (5) comprises a couple of opposite holes (6′, 6″) on opposite wall of the cannulated nail (10); the hole (6) closer to the screw head (4) has an internal partially threaded portion (28) and the corresponding screw (3) has an outside thread diameter smaller than the diameter of said at least one transversal hole (27) that receives such a screw. The partially threaded portion (28) works as a portion of nut screw but doesn't interfere with the screw during the normal insertion. In case of a undesired movement or displacement of the screw (3) after its final fastening or in use, the internal threaded portion (28) solve the problem engaging the threaded portion of the screw (3) at least in a crest to crest fashion.

A proximal humerus fracture plate for promoting healing of a fracture of a human humerus, comprising: an upper section having at least one screw hole for receiving an upper screw, the trajectory of the screw hole is a lateral to medial orientation; a transitional section having at least one screw hole for receiving a middle screw, the transitional section integral with the upper section and curved sufficiently to avoid a deltoid tuberosity, the middle screw fixing the transitional section along a lateral cortex of the humerus; and, a lower section having at least one screw hole for receiving a lower screw, the trajectory of the screw hole is an anterior to posterior orientation, the lower section integral with the transitional section.

A fixation device is disclosed for the fixation of proximal humerus fractures includes an implantable humerus plate having a proximal portion adapted to be positioned at a head and medial calcar of the humerus, a distal portion adapted to be positioned along a shaft of the humerus, and a plurality of calcar openings provided through the proximal portion adapted to receive calcar fasteners that extend into the medial calcar. The calcar fasteners are grouped into a rafted configuration and the tips of each fastener are positioned into the calcar region so that torsional forces bearing upon the calcar regions are distributed into the rafted fastener support, thereby avoiding varus collapse of the humerus head after fixation of the fracture.

A shoulder prosthesis of the present invention includes a modular humeral prosthesis component employing a collarless design. A body portion of the prosthesis is provided without a collar, and it may be implanted into a prepared proximal end of a humerus such that the body sits recessed below the level of the cut proximal surface of the humerus. A head portion is provided in which a support surface of the head functions as collar by direct apposition of it to the cut proximal humerus. The modular connection is thus recessed below the proximal bone surface. By providing a modular connection which is recessed below the bone surface, the benefits of modularity may be retained, while joint overstuffing may be reduced or eliminated, and a substantially full range of motion may be achieved.

An apparatus and method for reducing and fixing fractures, for example, a proximal humeral fracture. A jacking device releasably attached to a locking plate presses against an inferior aspect of the head to rotate the head into anatomic alignment. Suture material stitched into the soft tissue superior to the head pulls the superior end of the head and guides and steers the head. The suture material passes through suture holes in the superior end of the plate. The jacking device positions and holds the head in an anatomic neck/shaft angle, thereby allowing the head to be fixed to the locking plate. In one such embodiment, a swivel bushing in the plate receives the jacking device and allows the angle of the device to be adjusted as desired. To aid in the fluoroscopic visualization during surgery, a radiolucent retractor is used to avoid blocking the surgeon's view.

A device for use in the treatment of proximal humerus fractures, comprising a substantially spoon-shaped body having a blade-like proximal portion intended to complement the humerus head and provided with at least one seat in which to insert a wire, a threaded nail, or a similar element to stabilize the fracture, a plate-like and elongate distal portion, intended to complement the humerus neck and provided with at least one seat in which to insert a screw or a similar element to fix the body to the humerus, and a central bulge, or block, interposed between the proximal portion and the distal portion and wherein a seat is obtained in which to insert a screw intended to stabilize the humerus head.

A method and apparatus of reattaching a bone fragment to a proximal humerus of a humerus in a shoulder joint. The method includes introducing a distal end of the humeral nail into a medullary canal of the humerus. A first proximal screw is engaged with the bone fragment and a first proximal bore in the proximal end of the humeral nail to move the bone fragment toward the proximal humerus. The humeral nail and the attached bone fragment are rotated relative to the medullary canal of the humerus to position the bone fragment to an anatomically optimal location. The bone fragment is preferably one of a greater or lesser tuberosity of the proximal humerus. The method and apparatus can be used to reattach bone fragments in a variety of other joints.

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.

A stemless prosthetic shoulder joint may include a prosthetic humeral head and a stemless base. The stemless base may include a collar and an anchor extending from the collar intended to anchor the base into the proximal humerus. The anchor may include various features to enhance the fixation of the base, including hooks, threads, and/or expandable members that may be transitioned from a contracted insertion condition to an expanded implanted condition once the base is positioned in the bone. The anchor and/or collar may also include additional features to enhance fixation, such as geometries and surface features to enhance fixation to bone. The anchor may include a plurality of chisel slots to facilitate removal of bone during a revision surgery.

A humeral guide is provided that has a first portion or member configured to be positioned on a portion of a proximal humerus. The first portion or member can be configured to rest in a complementary manner on the portion of the proximal humerus. The humeral guide can be configured with apertures defining trajectories through bone, the pin trajectories being diverging in some case and in some cases being selected to enhanced support. A second portion or member and a third portion or member of the humeral guide are configured to be positioned on first and second lateral portions of the humerus distal to a location intended for resection, e.g., between an anatomical neck and a distal end of the humerus. The second and third portions or members or portions are configured to rest in a complementary manner on the first and second lateral portions of the humerus. The humeral guide can be configured to avoid soft tissue between a bone facing side and the humerus. The humeral guide can have a removeable jig portion.

The invention provides an implantable medical device for treatment of a proximal humerus fracture, comprising a base element to be anchored in the medullar cavity of the humeral shaft, a support element to be fixed with respect to the base element, wherein the support element is configured to support one or more bone fragments, wherein the medical device comprises positioning members configured to position the support element with respect to the base element in a range of rotational positions and axial positions, and wherein the medical device comprises a fixation device to fixate the support element, within the range of rotational positions and axial positions, in a desired rotational and axial position with respect to the base element. In an embodiment, the medical device is a non-occluding medical device, wherein after implantation the medullar cavity is not occluded by the medical device due to the open and non canal filling structure of the device preserving blood flow to the reattached bone fragments.

A bone plate system for repair of a proximal humeral head fracture, which includes a fixation plate having a main body and a depending alignment flange, a plurality of elongated compression screws to extend through the intact humeral head into the cortical bone of the fractured portion and a cover plate. With the fixation plate in place, fastened to the humerus, the cover plate is in turn fastened to the fixation plate and provides a defined amount of clearance in a region adjacent the heads of the compression screws to allow measured back-out of the screws upon settling of the fractured bone portion at the fracture site.

A humeral guide is provided that has a first portion or member configured to be positioned on a portion of a proximal humerus. The first portion or member can be configured to rest in a complementary manner on the portion of the proximal humerus. The humeral guide can be configured with apertures defining trajectories through bone, the pin trajectories being diverging in some case and in some cases being selected to enhanced support. A second portion or member and a third portion or member of the humeral guide are configured to be positioned on first and second lateral portions of the humerus distal to a location intended for resection, e.g., between an anatomical neck and a distal end of the humerus. The second and third portions or members or portions are configured to rest in a complementary manner on the first and second lateral portions of the humerus. The humeral guide can be configured to avoid soft tissue between a bone facing side and the humerus. The humeral guide can have a removeable jig portion.

A stemless prosthetic shoulder joint may include a prosthetic humeral head and a stemless base. The stemless base may include a collar and an anchor extending from the collar intended to anchor the base into the proximal humerus. The anchor may include various features to enhance the fixation of the base, including hooks, threads, and/or expandable members that may be transitioned from a contracted insertion condition to an expanded implanted condition once the base is positioned in the bone. The anchor and/or collar may also include additional features to enhance fixation, such as geometries and surface features to enhance fixation to bone. The anchor may include a plurality of chisel slots to facilitate removal of bone during a revision surgery.

The invention discloses an olecroanon locking proximal humerus plate, which is an integrated plate with a head part and a body part, wherein the head part comprises a face part and a vertex part, and the face part and the vertex part are bended into an angle of 104-115 degrees; the head part is provided with a group of locking holes; the body part is provided with a group of locking holes and pressurizing holes; an angle of inclination of the lower section and the upper section of the body part is 5-9 degrees; the vertex part of the head part is provided with a first locking hole and a second locking hole; a nape is arranged between the first locking hole and the second locking hole; the face part of the head part is provided with a group of thread locking holes and a group of small holes for temporary fixing; and the tail end of the body part is provided with 1-3 holes for temporary fixing. The locking plate can treat olecranal fracture and at the same time complicate fracture shaft ulna, has good olecroanon attach performance with human body, no need of shaping during clinical practice, is convenient for operation, has good stability, and can improve the treatment effect.

The invention relates to a fracture three-dimensionally-intersecting-connecting-locking internal fixing device. The fracture three-dimensionally-intersecting-connecting-locking internal fixing device is characterized by including the distal-femur fracture three-dimensionally-intersecting-connecting-locking internal fixing device, the proximal-humeral fracture three-dimensionally-intersecting-connecting-locking internal fixing device, the femoral-intertrochanteric fracture three-dimensionally-intersecting-connecting-locking internal fixing device, the femur-neck and proximal-femoral fracture connecting-locking internal fixing device, the backbone intersecting and locking internal fixing device and the backbone sliding-chute locking internal fixing device in a three-dimensionally intersecting, connecting and locking mode. According to the fracture three-dimensionally-intersecting-connecting-locking internal fixing device, the space structure which has the three-dimensional rotation resisting effect and the introversion resisting effect and is optimal and most stable for distal femur fractures is formed; the internal fixing device is tightly attached to the femur inner-side fracture line through high-strength slant cotter pins, the continuity of cortexes of bone is rebuilt to achieve strong spanning supporting, introversion shifting of fractures is effectively prevented, and static force stabilization in structural mechanics is achieved; as locking pins span the two ends of the fracture line to resist bending stress firstly, part of the stress is borne by screws, and the world problem that due to stress concentration of AO locking plates for backbone fractures, proximal femoral fractures, distal femur fractures and proximal humeral fractures, plate breaking often occurs is solved in structure and biomechanics.