24 results about "Joint prosthesis" patented technology

The present application belongs to the field of biomedical materials and computer aided design technology, and discloses a kind of porosity gradient adjustable hip joint prosthesis porous coating topological optimization method.The present application is aimed at solving the problems of existing design, such as unadjustable porosity distribution, gradient mutation, difficult to balance mechanical properties and bone integration, and the gap between topological optimization and manufacturing constraints.The method introduces nonlinear porosity gradient constraints and adaptive optimization mechanism in the process of topological optimization through the steps of geometric modeling and boundary condition definition, nonlinear porosity gradient field generation, finite element analysis, sensitivity analysis, density filtering and porosity constraint processing, optimization criterion updating and convergence judgment, and realizes the smooth transition of porosity from the core to the surface of the prosthesis.The present application can optimize the mechanical support and biological integration performance simultaneously, eliminate non-manufacturable structures, and adjust the gradient parameters and modularize the extension, providing an efficient and reliable calculation method for personalized hip joint prosthesis design, and having significant engineering and clinical application value.

This invention provides a fixation device and assembly method for pericondylar fractures of the knee joint prosthesis. The knee joint prosthesis includes a femoral condyle, a tibial plateau, and a tibial pad. The femoral condyle includes an anterior condyle, two posterior condyles, and an intercondylar fossa. A fixation device is installed in the intercondylar fossa, comprising an intramedullary fixation pin and a connecting fixation block. The connecting fixation block is installed within the intercondylar fossa and engages with the force-applying end of the intramedullary fixation pin. The connecting fixation block includes a main body with a top surface facing the tibial pad and a bottom surface opposite the top surface. The bottom surface extends away from the top surface to form a protrusion, and a through hole is formed within the protrusion, which is used to accommodate and fix the force-applying end of the intramedullary fixation pin. This invention embeds the entire connecting fixation block within the intercondylar fossa, fully utilizing the existing intercondylar fossa space of the PS-type prosthesis to establish a precise channel for the intramedullary fixation pin, thereby fixing the pericondylar fracture through structural fit.

This invention discloses a cobalt-chromium-molybdenum knee joint prosthesis with a nano-TiN coating and its preparation method. The prosthesis includes a cobalt-chromium-molybdenum alloy knee joint prosthesis substrate, the surface of which is coated with a nano-TiN coating. The nano-TiN coating is doped with Cu element at a doping amount of 1.0-1.5 at.%. The nano-TiN coating has a Vickers hardness of 3400 HV, a surface roughness Ra≤0.05μm after polishing, and a friction coefficient of 0.23. The nano-TiN coating of this invention has a hardness of 3400 HV, which is much higher than that of traditional TiN and TiNbN coatings. After mirror polishing, the coefficient of friction is as low as 0.23, significantly reducing the wear rate and the release of metal ions, thus increasing the service life of the prosthesis by 30%. At the same time, the coating completely covers the cobalt-chromium-molybdenum alloy knee joint prosthesis substrate, effectively blocking the release of Co and Cr metal ions, eliminating postoperative metal allergic reactions, and making it suitable for patients with allergies. Moreover, the 1.0-1.5 at.% Cu doping makes the coating antibacterial rate ≥95%, reducing the postoperative infection rate to below 0.7%, which is far lower than the 2.3% of traditional TiN coatings.

A talonavicular joint prosthesis includes a navicular component configured to be implanted in a navicular bone and including a base and a surface having an articulation recess formed therein; and a talar component configured to be implanted in a talus bone and including a bearing section configured to rest within the articulation recess. The talar component and the navicular component are shaped such that, when brought together, there is more conformity between the navicular component and the talar component in a dorsal-plantar plane than in a medial-lateral plane.

This invention relates to the field of artificial joint prosthesis technology, and discloses an anatomical femoral condyle knee joint prosthesis that does not preserve the cruciate ligament. The prosthesis includes a femoral condyle, a tibial plateau pad, and a tibial plateau support. The femoral condyle comprises a medial condyle and a lateral condyle. The medial and lateral condyles, in lateral view, respectively form medial condyle curve contours and lateral condyle curve contours. The medial condyle curve contour is located lateral to the lateral condyle curve contour, and the movement trajectory length of the medial condyle curve contour is 15%-25% longer than that of the lateral condyle curve contour. The tibial plateau pad has medial condyle curved grooves and lateral condyle curved grooves that respectively conform to the medial and lateral condyles. The slope of the medial condyle curved groove is greater than that of the lateral condyle curved groove. This invention provides an anatomical femoral condyle knee joint prosthesis that does not preserve the cruciate ligament, solving the problem of poor compatibility between existing prostheses and surrounding tissues after implantation.

A multi-piece implantable joint prosthesis includes an adapter to which at least two pieces are coupled, where the adapter has a coupler for coupling to a first piece and a different coupler for coupling to a second piece, where at least one piece, e.g., the first piece, may contain an electronic component such as a sensor that detects and measures movement of the prosthesis when the prosthesis is implanted in a patient, and can thus monitor the kinematic movement of the patient in real life situations, where the electronic component may also include a memory to store the data obtained by the sensor, and a communication interface to transmit the data to an external location where it may be analyzed, and a power source to provide power to the sensor, memory and communication interface.

The application discloses a multiple controlled-release drug-loaded coating modified anti-heterotopic ossification artificial temporomandibular joint prosthesis and a preparation method thereof, and comprises the following steps: surface treatment of a biomimetic artificial temporomandibular joint prosthesis; dopamine assisted co-deposition is adopted to sequentially form a DF-HA self-assembled nanosphere coating and a meloxicam liposome drug-loaded coating on the surface of the biomimetic artificial temporomandibular joint porous titanium prosthesis; and RGD is grafted on the surface of the meloxicam liposome drug-loaded coating by chemical natural deposition, and the anti-heterotopic ossification artificial temporomandibular joint prosthesis is obtained. The artificial temporomandibular joint prosthesis is modified by active drug-loaded meloxicam liposomes on one hand, and the artificial temporomandibular joint prosthesis is modified by RGD-DF-HA layered drug loading on the other hand, long-term slow release and programmed release of drugs are realized, anti-inflammatory effects are achieved, the purpose of treating and preventing heterotopic ossification after artificial joint replacement is achieved, long-term stability of artificial joint replacement is beneficial, early prevention, intervention, service life of the artificial joint prosthesis is improved, and the life quality of patients is improved.

The subtalar joint prosthesis comprises a talus assembly, a gasket and a calcaneus assembly, and the talus assembly and the calcaneus assembly are connected through the gasket to form a joint structure; by means of the split structure of the talus assembly, the gasket and the calcaneus assembly, all the assemblies are detachably clamped, step-by-step implantation and assembly in the operation process are facilitated, and therefore the adaptability of the prosthesis under different anatomical conditions is improved. The gasket is arranged between the talus assembly and the calcaneus assembly, a relative motion interface is formed between the talus assembly and the calcaneus assembly, the gasket is made of the low-friction material, direct friction between metal assemblies can be effectively reduced, abrasion is reduced, and the joint movement performance is improved. By means of the structural design, dependence of prosthesis implantation on accurate matching of bone surfaces is reduced, surgical operation is simplified, and meanwhile a feasible solution is provided for rebuilding after joint fusion operation.

The present application relates to a kind of ankle joint prosthesis and ankle joint prosthesis system, the ankle joint prosthesis includes: tibial prosthesis, sliding core prosthesis and talus prosthesis, the sliding core prosthesis is arranged between the tibial prosthesis and the talus prosthesis, the sliding core prosthesis has concave spherical surface, the talus prosthesis has convex spherical surface, the convex spherical surface and the concave spherical surface sliding fit, in the projection parallel to the sagittal plane of the ankle joint prosthesis, the midpoint of the line of the front end of the tibial prosthesis and the rear end of the tibial prosthesis is P1, in the front-rear direction of the ankle joint prosthesis, the first coronal plane F1 passing through the center of the convex spherical surface has preset interval with P1, and the P1 is located in the rear side of the first coronal plane F1.The structure of the ankle joint prosthesis of the present application is stable after implantation, stress is uniform, can slow down prosthesis wear, is beneficial to patient postoperative recovery.

Provided is a knee prosthesis. The knee prosthesis includes at least one of a femoral prosthesis, and a tibial prosthesis. The femoral prosthesis includes a first substrate, and a first connecting part connected to the first substrate. The tibial prosthesis includes a second substrate, and a second connecting part connected to the second substrate. A hard coating is arranged on at least one of outer surfaces of the first substrate and the second substrate.

The present application provides a kind of ankle joint prosthesis, comprising: tibial prosthesis;Talus prosthesis, with tibial prosthesis sliding fit, talus prosthesis includes talus body and buffer pad, buffer pad is in contact with tibial prosthesis, talus body is provided with multiple hole parts to the side of tibial prosthesis, multiple hole parts are arranged in array, buffer pad includes pad body and multiple plug-in parts, multiple plug-in parts and pad body are connected, multiple plug-in parts and multiple hole parts are set up one by one, plug-in part is inserted into corresponding hole part, pad body and multiple plug-in parts are configured to be able to produce elastic deformation under pressure state.The technical scheme of the present application effectively solves the problem that the ankle joint prosthesis in the related art is difficult to realize the mechanical environment of physiological state.

An orthopedic assembly includes a tibial prosthesis that includes a body that defines an anterior side and a posterior side. The body further incudes a recess in the anterior side of the joint prosthesis and a plurality of openings that extend through the body from the anterior side to the posterior side thereof. At least a first and second opening of the openings are positioned at respective lateral and medial sides of a longitudinal axis of the tibial prosthesis. A modular insert is positioned within the recess of the body such that at least a portion of the modular insert is positioned between the openings of the body. The modular insert is formed separately from the tibial prosthesis and has a porous outer surface to promote tissue ingrowth.

This invention consists of reproducing the main movements of the natural knee: Flexion / Extension (F / E) and the Anterior / Posterior (A / P) gliding movement under a static load while using servo drives, servo motors, sensors, a linear displacement table based on ball screws, a data acquisition card, a microcomputer, a communication bus and control software. This test bench makes it possible to quantify the friction and wear of a knee prosthesis in order to discover a new material for the tibial insert for the manufacture of knee prostheses allowing for a satisfactory lifespan and postponing the second surgical intervention.

This application provides a self-adaptive trabecular bone knee joint prosthesis and its design and fabrication method. The electronic device acquires a bone-cut model of the knee joint and a prosthesis model that adapts to the osteotomy surface of the bone-cut model; assembles the bone-cut model and the current prosthesis model into an assembly; performs mechanical simulation using the assembly to obtain the stress and strain distribution at the contact surface between the prosthesis model and the bone-cut model; if the strain distribution does not meet the ideal strain range requirement, the structure of the contact interface is adjusted according to the strain distribution to obtain a new prosthesis model; this process continues until the strain distribution at the contact interface meets the ideal strain range requirement. Thus, instead of relying on experience or a uniform template, a fitting scheme is dynamically generated based on each patient's actual anatomy and mechanical response, thereby solving the current problem of not being able to adapt to individual patient differences, improving the long-term bonding stability of the prosthesis and bone, and extending the prosthesis's lifespan.

The application discloses a wrist joint prosthesis, relates to the technical field of medical devices, and comprises a carpal bone connecting assembly, a radius connecting assembly and a locking structure; the carpal bone connecting assembly comprises a carpal bone bracket, a carpal bone pad in sleeve joint with the carpal bone bracket, a carpal bone positioning column in separable plug joint with the carpal bone bracket and two bone screws for being connected with carpal bones, the screw caps of the bone screws are in sliding joint with straight through holes on the carpal bone bracket, and the carpal bone bracket is in separable connection with the bone screws through the locking structure; the radius connecting assembly comprises a radius bracket and a radius extension handle, the radius bracket is in separable connection with the radius extension handle through a clamping structure, and the radius bracket is provided with a circular arc surface matched with the carpal bone pad. The application is convenient and reliable to use, and is convenient for local structure adjustment or replacement in a later surgery process.

The present application belongs to the technical field of spinal surgery implants, and discloses a new lumbar facet joint prosthesis, which comprises a first fixed base and a second fixed base, a central auxiliary support module connecting the first fixed base and the second fixed base, two groups of joint modules, a joint socket and a joint head, the joint head is ellipsoidal, the joint head is arranged in the inner cavity of the joint socket, the joint head and the inner cavity of the joint socket are in clearance fit, a first opening and a second opening are arranged on the joint socket, and the height of the side wall of the joint socket near the central auxiliary support module on one side is higher than that on the opposite side. The two groups of joint modules symmetrically arranged are used for supporting and limiting the two sides of the vertebral body respectively, instead of the arrangement of a single central elastic connecting piece, so that more stable support is provided, and the stability of the prosthesis is improved; through the clearance fit of the ellipsoidal joint head and the joint socket, the two groups of joint modules are dynamically active, the multidimensional movement of the natural facet joint is simulated, and the movement mode of the lumbar vertebrae is more fitted.

The application discloses a knee joint prosthesis system and a preparation method, wherein the femoral condyle prosthesis, the tibial plateau pad prosthesis, the tibial plateau prosthesis and the patellar prosthesis are made of zirconium niobium alloy, so that the sliding friction contact surfaces of the tibial plateau pad prosthesis, the patellar prosthesis and the femoral condyle prosthesis are metal ceramic interfaces formed by oxidation of zirconium niobium surfaces, the wear rate is lower, the active wear of the joint prosthesis can be effectively reduced, the service life of the joint prosthesis is prolonged and the failure rate is reduced, meanwhile, the risk of osteolysis caused by debris generated by wear of a traditional prosthesis due to an ultra-high molecular weight polyethylene tibial plateau pad prosthesis, and further triggering the risk of loosening of the prosthesis, can be avoided. Moreover, the bone integration interfaces of the femoral condyle prosthesis, the tibial plateau prosthesis and the patellar prosthesis are zirconium niobium alloy trabecular structures, so that the zirconium niobium alloy trabecular structures have excellent biocompatibility, are convenient to combine with the bone tissue of a patient and can improve the bone integration efficiency of the frame body and the bone tissue.

Systems and methods facilitate the planning and performance of hip and other surgeries. A computer model of a hip may be generated and displayed. A template of a hip component that replaces a native portion of the hip may be superimposed on the model. Changes in leg length, offset, or anterior-posterior (AP) position as well as a virtual distance between a landmark on the model and a location on the template may be determined. During surgery, a physical distance corresponding to the virtual distance may be obtained. The template may be moved relative to the model to match the physical distance, and new change values in leg length, offset, or anterior-posterior (AP) position may be determined. The new change values may be evaluated, and the surgery may proceed, or the process may be repeated using templates corresponding to alternative components.

The application provides a knee joint prosthesis periprosthetic fracture fixation device and an assembling method. The knee joint prosthesis comprises femoral condyles, a tibial plateau and a tibial pad. The femoral condyles comprise an anterior condyle, two posterior condyles and an intercondylar fossa. The fixation device is installed at the intercondylar fossa. The fixation device comprises an intramedullary fixation needle and a connecting fixation block. The connecting fixation block is installed in the intercondylar fossa. The connecting fixation block is connected with the force applying end of the intramedullary fixation needle. The connecting fixation block comprises a main body. The main body has a top surface facing the tibial pad and a bottom surface opposite to the top surface. The bottom surface extends in a direction away from the top surface to form a protruding part. A through hole penetrating through the main body is formed in the protruding part. The through hole is used for accommodating and fixing the force applying end of the intramedullary fixation needle. The whole connecting fixation block is embeddedly installed in the intercondylar fossa. The original intercondylar fossa space of the PS type prosthesis is fully utilized to establish a precise channel of the intramedullary fixation needle. The periprosthetic fracture is fixed through structural cooperation.

The present application relates to a kind of knee joint prosthesis and its manufacturing method, wherein the knee joint prosthesis includes tibial platform prosthesis, tibial platform prosthesis has osteotomy fitting area;Osteotomy fitting area includes integration area, anchoring area and transition zone;Integration area is positionally corresponding with host cancellous bone area, for inducing bone tissue growth to realize long-term biological fixation;Anchoring area is positionally corresponding with host sclerotic bone area or cortical bone area, realizes immediate fixation by mechanical interlocking;Transition zone is located between integration area and anchoring area, and the porosity of transition zone gradually decreases along the direction of integration area to anchoring area, and structural rigidity gradually increases along the direction of integration area to anchoring area, its beneficial effect is, the active adaptation of prosthesis and host bone bed non-uniform biological characteristics is realized, immediate mechanical stability and long-term biological integration effect are obtained under the premise of not needing permanent screw auxiliary fixation, the risk of prosthesis loosening is reduced, and the clinical service life of prosthesis is effectively prolonged.

An implantable mandibular joint prosthesis includes a first implant part that has an artificial condyle that can be attached to a lower jawbone, a second implant part that has a joint surface that can be attached to a cranium and that forms an abutment for the artificial condyle The second implant part comprises includes a first component which is formed from a metal material and can be attached to the cranium, and a second component which is formed from a plastics material and forms the joint surface. The first component has a first connection surface and the second component has a second connection surface, wherein the first and second connection surfaces are mutually engagingly joined together.

The invention relates to a spacer mould used in the field of health, particularly in orthopaedics and traumatology, during the treatment of infections around knee prostheses. The invention particularly relates to a spacer mould for the femur and the tibia, comprising detachable and nested moulds, by means of which the length can be adjusted with the locked structure and the antibiotic cement to be seated can be shaped in the desired size.

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 patient's 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 method for implanting a shoulder prosthesis includes distracting a gleno-humeral joint, inserting into the distracted joint a hollow main body having a substantially cylindrical or truncated-cone shape, laterally accessing inside the hollow main body through a second opening defined by at least one lateral element, and performing at least one of bone machining of the glenoid cavity and implantation of one or more glenoid prosthesis components through the first opening while the main body maintains the joint distracted. The main body includes a first end configured to abut a humeral portion, and a substantially annular second end configured to abut a glenoidal portion. The substantially annular second end defines a first opening sized to surround a glenoid cavity. The at least one lateral element maintains a three-dimensional spaced structure between the first and second ends.