40results 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 disclosure relates to a surgical foam structure comprising an open-porous body made of at least one biocompatible implant material, wherein the porous body is dimensioned such that it fulfills at least one of the following: the porosity is in the range of 0.81 to 0.91 %, and the average pore diameter is in the range of 1.10 to 1.41 mm. The disclosure also relates to a system comprising the foam structure and a surgical fixation device for attaching the foam structure to bone.

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.

The invention discloses an extensible femoral shaft prosthesis, and relates to the technical field of medical instruments, the extensible femoral shaft prosthesis comprises an upper split body, a lower split body, a limiting assembly and an adjusting ring, one end, far away from the upper split body, of a screw rod is used for extending into a containing channel, and the screw rod can move in the length direction of the containing channel; the limiting assembly is arranged on the lower split body and has a first limiting state and a second limiting state, and the limiting assembly in the first limiting state can limit the rotation freedom degree of the screw in the containing channel and the movement freedom degree of the screw in the length direction of the containing channel. The limiting assembly in the second limiting state can only limit the rotational degree of freedom of the screw rod in the accommodating channel; the adjusting ring is in threaded connection with the screw rod and located between the upper split body and the lower split body, and when the limiting assembly is in the second limiting state, the adjusting ring can be rotated to drive the screw rod to move in the channel so as to drive the upper split body and the lower split body to be away from each other. Postoperative recovery is facilitated, the infection risk is reduced, and postoperative recovery of a patient is better.

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.

An improved modular rotational device includes a first and second threaded coupler for affixation along the stem of an endoprosthetic device, for example, a humeral prosthesis or a femoral prosthesis. The rotational device axis of rotation is coaxial with the stem, and its axis of rotation is located in close proximity to the intramedullary stem of the prosthesis or in close proximity to the distal articulation of the prosthesis. A housing has a proximal and distal end with an axial bore therethrough for receiving an elongated stem of the device. A lobe ring may be utilized to limit the axis of rotation of the device. Additional endoprosthetic devices may be attached to male or female threaded couplers, or to Morse tapers. A plurality of suture attachments facilitates attachment of soft tissue thereto.

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.

The present invention relates to a unicompartmental femoral prosthesis system and a unicompartmental femoral prosthesis. The unicompartmental femoral prosthesis system includes N unicompartmental femoral prostheses of gradually increasing size, wherein N ≥ 2, and the ratio of the anteroposterior diameter of each unicompartmental femoral prosthesis to the posterior condyle height of the unicompartmental femoral prosthesis increases as the size of the unicompartmental femoral prosthesis increases. The anteroposterior diameter is the maximum length of the unicompartmental femoral prosthesis in the horizontal direction, and the posterior condyle height is the maximum height of the unicompartmental femoral prosthesis in the vertical direction. The above-mentioned unicompartmental femoral prosthesis system is more in line with the human anatomical structure, reduces the problem of insufficient coverage and instability of the distal femur or the posterior femoral condyle, reduces the risk of postoperative pain in patients, and makes patients feel better after surgery.

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.

An intercalary prosthesis for spanning portions of a long bone includes a first intramedullary component that has a first stem and a first connector disposed at one end of the first stem. The first stem is configured to be received within an intramedullary canal of a long bone. A second intramedullary component has a second stem and a second connector disposed at one end of the second stem. The second stem is configured to be received within an intramedullary canal of the long bone. The prosthesis also includes a connector component. The connector component has a body that includes opposing ends each with a connector configured to respectively connect to the connectors of the first and second intramedullary components. The body also has an outer shell and an inner lattice structure disposed within and connected to the outer shell.

A device that may be used as a bone implant to help with the treatment of osteonecrosis. The device may include a scaffold, a cap attached to one end of the scaffold, and a base attached to the opposite end of the scaffold. The scaffold may have a cylindrical shape. The scaffold may include a first lattice structure that forms an outer surface of the scaffold and is cylindrical in shape to define an interior space.

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 measuring assembly for determining the model of a femoral head prosthesis comprises a first measuring device and a second measuring device, the first measuring device comprising a first assembly fixed to the upper edge of the acetabulum and provided with a first scale and a second assembly fixed to the lesser trochanter of the femur, the second measuring device being provided with an opening, a sliding portion being provided in the opening, the sliding portion being provided with a connecting groove for connecting a femoral stem prosthesis, the sliding portion being further provided with a second scale and a second rack, and the second measuring device being provided with a screw rod that cooperates with the second rack rod for transmission; the present invention drives the sliding portion to move the femoral stem prosthesis by driving the screw rod, and at the same time the first assembly slides out of the second assembly, when the first scale is equal to the normal value from the upper edge of the acetabulum to the lesser trochanter of the femur, the corresponding second scale value is the difference in radial dimension of the femoral head prosthesis during surgery relative to a standard femoral head prosthesis, thereby determining the model selection of the femoral head prosthesis during artificial hip replacement surgery and solving the problem of unequal length of the lower limbs after total hip replacement surgery.

An improved modular rotational device includes a first and second threaded coupler for affixation along the stem of an endoprosthetic device, for example, a humeral prosthesis or a femoral prosthesis. The rotational device axis of rotation is coaxial with the stem, and its axis of rotation is located in close proximity to the intramedullary stem of the prosthesis or in close proximity to the distal articulation of the prosthesis. A housing has a proximal and distal end with an axial bore therethrough for receiving an elongated stem of the device. A lobe ring may be utilized to limit the axis of rotation of the device. Additional endoprosthetic devices may be attached to male or female threaded couplers, or to Morse tapers. A plurality of suture attachments facilitates attachment of soft tissue thereto.

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 invention is entitled "Orthopedic Prosthetic System for Rotationally Articulated Knee Prostheses". The invention discloses an orthopedic prosthesis comprising a femoral component configured to attach to the distal end of a patient's femur. A tibial support is configured to attach to the proximal end of a patient's tibia. A tibial insert is configured to rotate relative to the tibial support. A modular insert is received in a cavity defined within the tibial insert. The femoral component is rotatably coupled to the body of the modular insert.

The present invention discloses a cancellous bone reconstruction cap-shaped prosthesis, comprising a cap-shaped body, wherein the body comprises a proximal and outward-turned edge portion, and a hollow cap portion extending from the inner periphery of the edge portion to the distal end; a porous structure is formed on the inner and outer surfaces of the hollow cap portion. The porous structure on the outer surface of the hollow cap portion of the present invention can achieve bone ingrowth, so that the reconstruction prosthesis can obtain a long-term biological fixation basis, improve the fixation strength of the long-term femoral reconstruction prosthesis, and reduce the risk of long-term periprosthetic fracture; a micro-interlock is formed between the inner surface of the hollow cap portion and the bone cement femoral prosthesis, thereby improving the initial fixation effect of the bone cement femoral stem and improving the success rate of bone cement femoral prosthesis revision; the edge of the body is tightly pressed against the femoral cortical fracture surface, so that stress is transmitted from the reconstruction prosthesis to the femur, preventing the bone cement femoral stem from sinking into the medullary cavity, and improving the overall reconstruction strength of the remaining femoral prosthesis.