24results about "Femur" patented technology

An extracorporeally length-adjustable implant system comprises an implant component to be fastened to a bone to be lengthened and an adjustment device with two fastening parts that are displaceable relative to one another, each of which is intended for arrangement at a part of the bone to be lengthened, wherein the adjustment device is able to distract the two fastening parts and comprises a drive element with a permanent magnet arranged in rotationally fashion and a mechanism which converts a rotational movement of the permanent magnet into a distracting longitudinal movement of the adjustment device; and an extracorporeal drive unit for the drive element of the implant component. The extracorporeal drive unit comprises a rotatably mounted extracorporeal magnetic ring with an interior to receive the bone to be lengthened with the adjustment device, and an actuation device to rotate the extracorporeal magnetic ring in the ring plane thereof.

An implant system including a bone plate and a flexible implant attachment. The bone plate having a first arm and a second arm extending from a body of the bone plate. The flexible implant having a plurality of links chained together by a plurality of connectors. Each link of the plurality of links includes a core and a set of connectors. The set of connectors of the plurality of connectors extending laterally away from the core. Each connector of the set of connectors defines an opening positioned along a plane that intersects the longitudinal axis of the core at an oblique angle. Each connector of the set of connectors is linked to another connector of the plurality of connectors extending from another link of the plurality of links.

The present invention relates to a stem (4) for or of an implant (2) having a longitudinal axis (10) and at least one recess (12) adapted for cemented implantation into the medullary cavity (6) and / or a cavity (6) created by surgery of a long bone (8), characterized in that the recess is interrupted by a barrier (14). Further the present invention relates to a method for preparing a stem (4) of an implant (2) according to any one of the preceding claims for implantation, comprising the step of placing cement (16) into the recess (12) on both sides of the barrier (14).

The improved endoprosthetic device surface treatment encourages soft tissue attachment thereto. A porous mesh surface treatment creates on an outer surface of the endoprosthetic device a three-dimensional surface structure similar to cancellous bone. Suture attachment features are provided at various locations around the treated surface structure to initially affix a vascularized soft tissue to the treated surface. As the patient heals the soft tissue grows and infiltrates the porous mesh surface to achieve an attachment strength substantially equal to the surrounding tissue.

A bone part is repaired by a process. A first implant is attached to a first bone part. The first implant corresponds to an intraoperatively defined or an intraoperatively selected cutting path. A preoperatively defined second implant is attached to the first implant. The first implant and the second implant together augment the first bone part.

An implant system including a bone plate and a flexible mesh attachment. The bone plate having a first arm and a second arm extending from a body of the bone plate. The flexible mesh having a plurality of links chained together by a plurality of connectors. Each link of the plurality of links includes a core and a set of connectors. The set of connectors of the plurality of connectors extending laterally away from the core. Each connector of the set of connectors defines an opening positioned along a plane that intersects the longitudinal axis of the core at an oblique angle. Each connector of the set of connectors is linked to another connector of the plurality of connectors extending from another link of the plurality of links.

The invention relates to a connecting sleeve for anchoring shafts of two oppositely arranged prostheses, preferably on an elongate bone such as a femur or humerus. The reinforcing sleeve comprises two receiving bushes for one prosthesis shaft each and comprises a separable coupling region arranged therebetween for connection in such a manner as to resist shear forces and rotation. According to the invention, each receiving bush has, on the side thereof facing the coupling region, one fork of a pair of forks that interact with each other, and a fitting block is arranged on a base of the fork, the lateral surfaces of which fitting block have a distance that corresponds to an inner width of the fork, and the lateral surfaces are designed to contact flanks of the fork in a planar manner, at least one fastening screw being arranged transversely through the fork. The fork connection is simpler to produce than the known wedge connection and yet is sufficiently robust. Unlike in the case of the wedge connection, an exact fit is not required; a clearance fit between the fork and the fitting block is sufficient in principle, excessive play being eliminated by means of the fastening screw.

An extension-assisted hinged knee replacement comprises a femoral component, a tibial component, and a torque actuator operably interfacing the two components. The torque actuator is configured to apply extension torque based on the flexion angle of the knee, with the torque peaking between 0° and 90° of flexion. The implant may include a passive biasing element, which can be compressed or tensioned to enhance torque application, particularly during critical phases of knee extension.

The application relates to the technical field of medical devices, in particular to a hip joint spacer. The hip joint spacer comprises a spacer head, a femoral stem connected with the spacer head, Kirschner wires arranged in the spacer head and the femoral stem, an inner layer of the spacer head, an outer layer wrapped outside the inner layer, a through hole arranged on the outer layer to form a reserved channel, and the outer layer is communicated with the inner layer through the reserved channel. Compared with the prior art, the hip joint spacer has the advantages that the spacer head has an inner layer and an outer layer, the inner layer and the outer layer are made of different materials, the release time of antibiotics can be prolonged, the hip joint can maintain a high concentration of antibiotics, Kirschner wires are arranged in the spacer head and the femoral stem, the hip joint spacer has better mechanical strength than the prior art, can bear the weight of a patient, and can support the walking ability of the patient.

The invention provides an instrument for repairing femoral head defects, and belongs to the technical field of medical instruments. A guide pin, a guider, a chamfering cutter and a reamer; a guider cutting edge is arranged at the lower end of the guider, a center hole matched with the guide pin is formed in the guider, and the upper end of the guider is fixedly connected with a quick connector C; the guide needle is used as a common positioning reference to penetrate through the whole operation process, it is ensured that each step of operation from cartilage pre-cutting and defect area cutting forming to final reaming is accurately carried out along the preset axis, positioning deviation possibly occurring in a traditional method is effectively avoided, and due to the design of an observation hole in the guider and scale marks of a reamer rod body, the accuracy of the reamer is improved. Real-time and visual operation feedback and depth control are provided for doctors, visual and quantitative management of the operation process is achieved, and the accuracy of the prosthesis implantation position and the matching degree of bone bed forming are improved.

An endoprosthesis intended to replace a resected portion of bone and joint. The endoprosthesis can be non-invasively, manually operated to lengthen a patient's limb both intraoperatively and postoperatively. It includes bone anchoring components for anchoring to a first and second long bone, a joint to replace the function of an orthopedic joint, and a purely mechanical lengthening mechanism which can be located and operated manually by an operator by pressing on skin of a patient without requiring a surgical incision. The axle for joint is the actuating mechanism that lengthens the implant. The endoprosthesis does not need or include any magnets, electric motors, electric current, application of heat or a fluid displacement (hydraulic) system.

The invention relates to the field of medical instruments, and discloses an assembly for promoting bone healing, comprising: an implantation main body, the surface of which is provided with a mounting hole; the degradable part is arranged in the mounting hole, an open groove is formed in the surface of the degradable part, and the degradable part is elastically extruded in the direction from the outer side to the open groove, the degradable part is stably arranged in the implantation body, healing factors can be released in an oriented mode according to the operation position, the bone healing rehabilitation speed is increased, and the operation efficiency is improved. In addition, the implantation main body keeps providing a required mechanical supporting function for an operation position, so that the bone healing and rehabilitation effect can be ensured.

The present application relates to a kind of distal anchoring bone cement type prosthesis stem, including stem body, several anchoring blades and piston.The bottom end of the stem body is fixed on prosthesis, top end is inserted into medullary cavity, bone cement channel is provided in the stem body along the axial direction, injection hole is formed on the side wall of the stem body, and the injection hole is communicated with the bone cement channel;The anchoring blade is arranged at the top of the stem body, the bottom of the anchoring blade is rotatably connected with the top end of the stem body, the piston is sleeved in the bone cement channel, and under the driving of bone cement, it slides upward, when the piston slides to the top of the stem body, several anchoring blades are opened, and the anchoring blade is converted from the first state to the second state.The distal anchoring bone cement type prosthesis stem can improve the long-term stability of tumor type prosthesis, reduce the aseptic loosening of prosthesis, and improve the long-term function of limb of patients with malignant bone tumor.

Prosthetic component provided with a stem, adapted to be implanted in use at a bone of a patient, such as for example a tibial and / or femoral component of a knee prosthesis or a femoral component of a hip prosthesis or a humeral component of a shoulder prosthesis, or a component of an elbow prosthesis, including a device adapted to externally cover and / or to house at its interior at least the stem of the prosthetic component, wherein the device is in use placed between the prosthetic component and the bone of the patient, suitable to stably constrain in use the prosthetic component to the bone of the patient and to prevent the direct contact between prosthetic component and bone of the patient.

The application discloses a femoral stem system and a hip joint prosthesis, and relates to the technical field of medical devices, in particular to a femoral stem system and a hip joint prosthesis. The femoral stem system comprises a plurality of groups of femoral stems, wherein each group of femoral stems comprises at least one femoral stem; the femoral stem comprises a femoral neck and a stem body, the stem body is connected with the femoral neck, an included angle between an extension direction of the femoral neck and a central axis of the stem body is a neck-shaft angle, the stem body has oppositely arranged inner and outer sides, and a projection of the inner side on a coronal plane is an arc shape which is convex towards the outer side; the neck-shaft angle is X, a radius of the arc shape is Y, and the X and the Y satisfy the following relationship: Y=kX+b, wherein k is greater than 0 and less than or equal to 39, and b is greater than or equal to -4526 and less than or equal to 0. The femoral stem system has a reasonable structural design and is good in matching effect with a human body.

The present disclose relates to modular surgical implants, which can be used in treating long bone defect. In particular, the disclosure relates to a surgical implant modular assembly comprising at least a first scaffold and a second scaffold, wherein the first and the second scaffolds are identical.

A ceramic monobloc femoral component (10) is provided for a total hip replacement prosthesis. The ceramic monobloc femoral component (10) has a ceramic femoral stem (14) and a ceramic head (12) which defines a part-spherical articular surface receivable by an acetabular cup (56). The ceramic femoral stem (14) and the ceramic head (12) are integrally formed as one-piece.

This application relates to the field of medical devices, and more particularly to a 3D-printed personalized subtotal femoral replacement prosthesis, comprising a 3D-printed femoral segment. One end of the 3D-printed femoral segment has a short medullary nail integrally formed therein, which is inserted into the remaining femoral medullary cavity after osteotomy. The end of the 3D-printed femoral segment away from the short medullary nail is connected to the proximal femur, which is used to connect to the femoral head prosthesis. A reinforcing screw is inserted within the 3D-printed femoral segment, coaxially arranged with the 3D-printed femoral segment, and is used to sequentially penetrate from the distal end of the remaining femur into the short medullary nail and the 3D-printed femoral segment. This application has the effect of improving the stability of the femoral replacement prosthesis.

Provided herein are biomimetic osteochondral implants (100) that are generally useful for the at least partial resurfacing of damaged cartilage within a joint. The implants are constructed to have a modular, layered structure in which the physical properties (e.g., stiffness and lubricity) or dimensions of each layer can be adjusted (e.g., by using the appropriate material and controlling the thickness thereof) based on the anatomy to be replaced. For example, the material and or thicknesses of the layers can be selected to approximate the physical properties and / or dimensions of cartilage (and, optionally, chondral and subchondral bone).

Provided herein are biomimetic osteochondral implants that are generally useful for the at least partial resurfacing of damaged cartilage within a joint. The implants are constructed to have a modular, layered structure in which the physical properties (e.g., stiffness and lubricity) or dimensions of each layer can be adjusted (e.g., by using the appropriate material and controlling the thickness thereof) based on the anatomy to be replaced. For example, the material and or thicknesses of the layers can be selected to approximate the physical properties and / or dimensions of cartilage (and, optionally, chondral and subchondral bone). Also provided herein are methods of treatment involving the use of said biomimetic osteochondral implants to repair an osteochondral defect in a joint.

The present disclosure relates to surgical implants. In particular, the disclosure relates to a surgical implant modular assembly comprising at least a first scaffold and a second scaffold.

In an extracorporeal drive unit (7, 7', 7") for an extracorporeally length-adjustable implant system comprising an implant component (1) with an adjustment device (2) driven by a drive element, wherein the extracorporeal drive unit (7, 7', 7") is configured to actuate the drive element (3) by means of a magnetic field, it is provided that the extracorporeal drive unit (7, 7', 7") has an extracorporeal magnetic ring (8) and an actuating device (75), wherein the extracorporeal magnetic ring (8) is rotatably mounted about an axis of rotation of the magnetic ring which extends perpendicular to a ring plane of the extracorporeal magnetic ring (8), wherein the extracorporeal magnetic ring (8) has an interior space (80) for receiving a bone (90) to be lengthened with the adjustment device (2), wherein the actuating device (75) is configured to mechanically rotate the extracorporeal magnetic ring (8) about the inner axis.wherein the extracorporeal magnetic ring (8) comprises permanent magnets which generate a directed static magnetic field in the interior which is ring-fixed.

The disclosure provides a femoral prosthesis and a knee joint prosthesis, and belongs to the technical field of medical devices. The femoral prosthesis comprises a femoral condyle joint surface; the femoral condyle joint surface has a first joint surface part for abutting against a tibial joint surface in a first knee flexion angle range, and a second joint surface part for abutting against the tibial joint surface in a second knee flexion angle range; the first knee flexion angle range is from a first knee flexion angle to a second knee flexion angle; the second knee flexion angle range is from the second knee flexion angle to a third knee flexion angle; wherein the first knee flexion angle is selected from -20 to 0°, the second knee flexion angle is selected from 45 to 75°; the third knee flexion angle is selected from 50 to 90°, and the third knee flexion angle is greater than the second knee flexion angle; the sagittal plane of the first joint surface part has a single first radius of curvature, and the radius of curvature of the sagittal plane of the second joint surface part decreases from the front end to the rear end. The femoral prosthesis can improve the stability of joint movement and reduce the wear of the knee joint prosthesis in the gait state.

A bone cutting guide for preparing a femoral head allograft for transplantation. The guide includes a base and a head holder disposed atop the base and having a hemispherical body with a hemispherical interior cavity for containing a femoral head. The head holder includes fenestrations through which to view a femoral head disposed within the head holder. Coupling elements disposed about its upper rim enable it to be coupled to a dome-shaped top having similar coupling elements. The top includes an upwardly extending cylindrical portion with a cylindrical central passage provides a passage to pass a tool to machine a femoral head contained in the connected head holder and top. A disc-shaped guidewire guide rests securely atop the upwardly extending cylindrical portion and has a center hole through which to pass a guidewire.