A bone plate having at least one variable angle locking hole is described. The variable angle locking hole allows a bone anchor having a threaded head to be driven into underlying bone while oriented at an angle with respect to a central hole axis of the hole that is within a range of angles at which the head is configured to threadedly mate with the at least one thread of the bone plate. Accordingly, the bone anchor can be driven into the underlying bone until the threaded head threadedly purchases with the bone plate inside the variable angle locking hole.

Periprosthetic bone fixation plates are disclosed including, for example, periprosthetic proximal femur plate, periprosthetic distal femur plate, periprosthetic humerus plate, periprosthetic ring plate, and periprosthetic troch plate. In use, the periprosthetic bone fixation plates are arranged and configured for use in periprosthetic fractures. That is, the periprosthetic plates include one or more features to facilitate positioning and securement of the bone fixation plate to a patients bone that previously received a surgically implanted orthopedic device or implant such as, for example, an intramedullary nail, a hip prosthesis, a knee prosthesis, etc. In use, the one or more features are designed and configured to facilitate avoidance of the previous surgically implanted orthopedic device or implant. In addition, the periprosthetic bone fixation plates are arranged and configured to facilitate plating of a longer working length as compared to existing bone fixation plates (e.g., plating from, for example, femoral condyle to greater trochanter).

A bone plate defines an interior surface that defines: a hole extending through the plate along an axis; plate threads configured for locking with a threaded head of a locking screw; first, second, and third columns sequentially located about the axis; a first corner extending tangentially from the second to the first column; and a second corner extending tangentially from the third to the first column. The first and second corners are substantially equidistantly spaced from the axis. The plate threads extend across the first, second, and third columns and the first and second corners. The interior surface defines a recess between the second and third columns and facing the first column. An apex of the recess is spaced further from the axis than are the first and second corners, such that the recess circumferentially interrupts at least a portion of at least one of the plate threads.

The fracture fixation plate (1) is suitable for application to the volar surface of a distal radius, wherein the fracture fixation plate (1) has an elongated body section (2) which has a free proximal end (3) and a distal end (4) on which an ulna head section (5) and a radius head section (6) connect, which diverge distally from one another, wherein the two head sections (5; 6) are each independently connected to the distal end (4) of the body section (2) via a corresponding neck section (51; 61), the body section (2) and the two head sections (5; 6) are provided with a number of threaded holes (7) for receiving bone securing elements (8) and the body section (2) also has an elongate compression hole (9), and the fracture fixation plate (1) has a bone contact surface (10) and an opposing surface (11). The bone contact surface (10) is designed such that it is convex in the region of the ulna head section (5) and the bone contact surface (10) is designed as a curved surface in the region of the radius head section (6).

A bone plate system includes, for example, a bone plate and at least one bone plate hole cap. The bone plate includes a body having a first surface, a bone-engaging surface, and a plurality of through-openings. The bone plate hole cap includes a body having a first surface, a second surface, and a peripheral surface. The bone plate hole cap is securable in at least one of the through-openings in the bone plate. When the bone plate hole cap is secured in the through opening, the second surface of the bone plate hole cap is disposed adjacent to the bone-engaging surface of the bone plate. The bone plate with the bone plate hole cap secured in the through-hole increases the bending strength of a portion of the bone plate across the bone plate hole cap compared to the portion of the bone plate without the bone plate hole cap.

In order to apply, with a simple and easy means, proper pressure between bone segments spaced apart as a result of osteotomy or a bone fracture, without lowering the fixing force at the screw meshing portion, without increasing a dead space, and without increasing the thickness of the plate, the present invention provides a bone plate having an upper face, which is to be in contact with bone, a lower face, which is to be in contact with the bone, and a plurality of holes arranged to receive bone screws and connecting the upper face and the lower face. In at least one of the holes, a portion of an edge, on the upper face, of the hole is formed so as to be raised in the form of a protrusion higher than the upper face around the hole.

A plating system includes a bone plate including an aperture. A locking member is receivable in the aperture to attach the bone plate to a joint. The plating system includes a guide including a body having a first end portion, a second end portion, an attachment portion attached to the bone plate, and a rotating portion including a sleeve to receive a drill or a guide wire. The first end portion of the body is rotationally connected to the attachment portion to pivot the body about a first axis to move the sleeve, and the rotating portion is rotationally connected to the second end portion of the body of the guide to pivot the rotating portion about a second axis to move the sleeve. The rotating portion translates along the second axis to move the sleeve, and the sleeve defines one of a plurality of trajectories.

The invention provides a nonmetal implant screw locking structure, which has the advantages of simple structure, novel design, simple production and processing, and convenient clinical operation. In addition, the structure of the invention can be used for orthopedic nonmetal implants such as the bone injury repair plate, spinal fusion cage, spinal fixation plate, posterior cervical single trapdoor plate, posterior cervical plate, lumbar anterior plate and lumbosacral plate, bringing good economic and social benefits gradually.

Methods for understanding external and internal anatomy of bones through the use of imaging data and 3D modeling to facilitate the design of anatomically correct plates, devices and implants are disclosed. In one aspect the method results in an implant or plate that includes at least one curved surface wherein a contour of the at least one curved surface corresponds to an anatomic shape of a subject. The anatomic shape of the subject being determined based on an image of the bone.

A femur fixation system includes an intramedullary nail that includes a first bending stiffness and a bone plate that includes a second bending stiffness and a second torsional stiffness. In the femur fixation system either at least one of the second torsional stiffness compensates for the first torsional stiffness and the first torsional stiffness is insufficient to enable the intramedullary nail to stabilize the bone fracture independently of the bone plate or the first bending stiffness compensates for the second bending stiffness and the second bending stiffness is insufficient to enable the bone plate to stabilize the bone fracture independently of the intramedullary nail.