19 results about "Total knee" patented technology

Embodiments of the present invention provide a patellar prosthesis and a total knee joint prosthesis. In this embodiment of the invention, the patellar prosthesis is used to cooperate with a femoral prosthesis. The femoral prosthesis includes a medial condyle, a lateral condyle, and an intercondylar fossa for corresponding cooperation with the tibia. The medial and lateral condyles have a recessed groove in the middle to form a trochlear groove for receiving the patellar prosthesis. The width of the intercondylar fossa is L7. The patellar prosthesis includes a patellar articular surface that cooperates with the femoral articular surface. When the human body is flexed greater than 90°, the patellar prosthesis cooperates with the intercondylar fossa. The width of the overlap between the patellar prosthesis and the lateral condyle is L6, and the width of the overlap between the patellar prosthesis and the medial condyle is L5. When the human body is flexed between 90° and 135°, L5 / L7 is 0.11 to 1.30, and L6 / L7 is 0.11 to 1.42. Therefore, the patellar prosthesis according to embodiments of the present invention has the advantage of improving the stability of the patellar joint.

This invention proposes a tibial liner and a total knee joint prosthesis. The tibial liner includes a medial liner and a lateral liner. The medial liner has a medial articular surface. The cross-sectional line formed by the intersection of the medial articular surface and the sagittal plane includes an anterior lip segment, a functional segment, and a posterior lip segment connected in sequence. The sagittal radius of the anterior lip segment is larger than that of the functional segment, which effectively reduces the height of the anterior side of the medial liner and avoids interference between the femoral prosthesis and the anterior side of the medial liner during posterior tilt assembly of the knee joint prosthesis, thus preventing interference with the normal contact of the articular surface.

A method for producing a partial or total knee prosthesis suitable for human anatomy of an individual patient, the method comprising a design step of taking into account the patient's current and pre-lesion knee motion behavior, and further taking into account the patient's individual hip-knee-ankle joint (HKA) mechanical alignment, and utilizing these inputs, to produce a partial or total knee prosthesis suitable for human anatomy of the individual patient. A knee joint model as natural is recreated, where still the recreated natural knee joint model rather than the diseased knee joint model is used to create a prosthesis that recreates the natural knee joint.

The present invention relates to the technical field of orthopedic artificial joints, and in particular, to a metal total knee artificial joint and a method for preparing a metal total knee artificial joint. The metal total knee artificial joint comprises a femoral condyle prosthesis and a tibial plateau prosthesis. Both the femoral condyle prosthesis and the tibial plateau prosthesis are made of 3D printing of zirconium-niobium alloy. The two can be slidably matched, and the sliding contact surface of the femoral condyle prosthesis and the tibial plateau prosthesis is provided with a metal-ceramic interface; the integration interface of the femoral condyle prosthesis and the tibial plateau prosthesis with the external bone body is a 3D-printed trabecular integration interface. The metal total knee artificial joint eliminates the tibial plateau pad prosthesis, and through the metal-ceramic interface, it can reduce the amount of osteotomy of the tibial plateau and optimize the wear of the friction interface, thereby avoiding the risk of osteolysis caused by debris generated by wear, which in turn causes the prosthesis to loosen. It can also improve the bone integration efficiency of the interface between the prosthesis and the bone tissue, which is beneficial to the stability of the prosthesis in the later stage of implantation.

This invention proposes a total knee arthroplasty, comprising a tibial liner and a femoral prosthesis. The medial articular surface is constructed as a curved surface with a sagittal radius of RTM, and the distal surface of the medial condyle is constructed as a curved surface with a sagittal radius of RFM that overlaps with the medial articular surface, wherein 1:1.1≥RFM:RTM≥1:1.8. The medial articular surface of the proposed total knee arthroplasty is an arc with a single radius in the medial sagittal plane, and there is a relatively high fit between the medial articular surface and the medial condyle. This ensures stable rotation of the total knee arthroplasty around the medial side and provides a certain range of anterior-posterior displacement for the medial condyle, improving the high flexion performance of the total knee arthroplasty. The high fit between the medial articular surface and the medial condyle also provides a large contact area, effectively reducing wear on the total knee arthroplasty and extending its service life.

The invention is entitled "Femoral Trial Components and Associated Orthopedic Methods of Use." The invention discloses an orthopedic system for a total knee implant comprising a plurality of femoral trial components of universal size. Each femoral trial component of universal size comprises a first femoral condyle having a first articulating surface configured to engage a tibial component, and a second femoral condyle that is spaced apart from the first femoral condyle. The second femoral condyle has a second articulating surface configured to engage the tibial component. An anterior cam is positioned between the first femoral condyle and the second femoral condyle. A method of using such a system is also disclosed.

The utility model provides a distraction device for total knee replacement surgery. The distraction device comprises a first holding distraction component, a second distraction component and a second holding component, wherein the first holding distraction component comprises a first distraction part used for distraction of a knee joint, a first holding part used for holding and a first connecting part used for connecting the first distraction part and the first holding part; the second distraction component comprises a second distraction part for distraction of the knee joint, a pushed part and a second connecting part for connecting the second distraction part and the pushed part; the second holding component comprises a second holding part used for holding, a pushing assembly used for pushing the pushed part to enable the first distraction part and the second distraction part to be distraction, and a third connecting part connected with the second holding part. The first connecting part, the second connecting part and the third connecting part are mutually hinged; the dilator further comprises a locking assembly used for locking the first distraction part and the second distraction part in the distraction state, and the locking assembly is fixedly installed on the first connecting part.

A modular orthopedic implant system configured to interconnect fracture fixation implants with arthroplasty components across multiple anatomic sites. The system incorporates a clothespin-style tapered male stem and a fluted female receiver, forming a secure, fatigue-resistant mechanical interface. This docking feature enables modular coupling between trauma implants such as intramedullary nails and joint replacement constructs including total hip stems, total knee femoral components, total shoulder stems, reverse shoulder humeral components, and ankle arthroplasty tibial components. The modular configuration allows adaptability across anatomical regions, facilitating revision, limb salvage, and periprosthetic fracture stabilization.

A tibial insert includes an articular surface and a bottom surface opposite the articular surface. The bottom surface includes one or more bone-conserving features. In some embodiments, the bottom surface may be curved to match a curvature of the articular surface such that a thickness of the tibial insert is relatively constant. In other embodiments, the bottom surface may be relatively planar but include a protrusion extending from a planar base surface to maintain a minimum thickness of the tibial insert. The described features may be incorporated in a uni-compartmental tibial prosthesis, a bi-compartmental tibial prosthesis, or a total knee prosthesis.

The utility model relates to the technical field of pressure testing devices, in particular to a total knee joint prosthesis constraint degree testing tool which is fixed on a workbench of a tensile machine and comprises a fixing seat used for installing a tibia component and an adjusting seat used for installing a thighbone component, the fixing seat is arranged on the workbench, the adjusting seat is fixedly connected with a chuck of the tensile machine, and the adjusting seat is arranged on the workbench. The tibia assembly and the femur assembly are oppositely arranged, the workbench is further provided with a sliding rail for linear displacement of the fixing base, and one side of the fixing base is provided with a tension source used for driving the fixing base to move and enabling the tibia assembly on the fixing base to make contact with the femur assembly on the adjusting base. According to the total knee joint prosthesis constraint degree testing tool, through cooperation of the tensile machine for applying vertical pressure and the sliding seat for applying horizontal tensile force, two axial experiments are completed at a time, stress of load movement at different buckling angles is simulated, and the testing efficiency is effectively improved.

The utility model discloses a total knee arthroplasty guide plate, which relates to the technical field of knee arthroplasty and comprises a base plate component, the base plate component comprises a base piece, a mounting piece is fixedly mounted at the top of the base piece, a top block component is fixedly mounted at the bottom of the mounting piece, and a side block component is fixedly mounted on the base piece. The top block assembly and the side block assembly are both 3d printing pieces, the top block assembly and the side block assembly are made of polylactic acid, a first fixing hole is formed in the middle of the base piece, a guide groove is formed in the middle of the top end of the base piece, and an observation groove is formed in the middle of the mounting piece; according to the utility model, the top block assembly and the side block assembly can be replaced, materials are saved, and the top block assembly and the side block assembly are small in overall size, high in printing speed, beneficial to improving efficiency and high in practical value.

The invention relates to the technical field of medical images, and discloses a total knee joint CT image segmentation method and device, equipment and a medium, and the method comprises the steps: obtaining total knee joint CT image data, and carrying out the overall segmentation through a rapid segmentation model, and obtaining a femoral image and a tibia image preliminary result; extracting the maximum connected domain of the two through connected domain analysis to obtain a preliminary result of the stable continuous bone structure; positioning a complex key area, and cutting an original image to generate local data; carrying out fine segmentation through a fine segmentation model to obtain a key region fine result; and fusing the two types of results to generate a final segmentation result. A layering strategy of coarse segmentation and fine segmentation is adopted, the processing efficiency and precision are both considered, and the real-time analysis requirement of the total knee joint bone structure is met.

This invention relates to a method for assessing soft tissue laxity during total knee arthroplasty, comprising: establishing a total knee joint model using a prosthetic bone model with artificial ligaments and muscles; applying progressively increasing tension to the medial and lateral sides of the knee joint using a TKA soft tissue balance solver to obtain a lattice coordinate diagram of the medial and lateral joint gap; selecting a pad of thickness I based on the medial and lateral knee joint gap, and plotting two straight lines y = I and x = I on the lattice coordinate diagram, recording the number of points above y = I (called the lateral laxity redundancy parameter A), and recording the number of points to the right of x = I (called the medial laxity redundancy parameter B); simultaneously calculating the sum of the distances from each point above y = I to the line y = I (called the lateral laxity redundancy parameter C), and calculating the sum of the distances from each point to the right of x = I to the line x = I (called the medial laxity redundancy parameter D); and assessing the degree of soft tissue laxity redundancy.

The utility model discloses a knee joint replacement assembly type tibia base prosthesis, and belongs to the technical field of medical instruments. The defects that in the prior art, a traditional tibia base prosthesis is loosened, and movement of a knee joint is limited are overcome. The main structure of the tibia support assembly comprises a tibia support assembly central base, a near-end locking screw, a far-end locking screw and a tibia support assembly clamping groove matched with the tibia support assembly central base, the tibia support assembly central base is provided with a central inner hole thread and a positioning hole, and the tibia support assembly clamping groove is provided with a central hole and an inner hole thread. The near-end locking screw penetrates through the central hole and then is in threaded connection with a central inner hole thread in the central base of the tibia support assembly, and the far-end locking screw penetrates through the positioning hole and then is in threaded connection with an inner hole thread in the clamping groove of the tibia support assembly. The artificial total knee joint replacement device is mainly used for artificial total knee joint replacement.

The utility model discloses a tibia pad prosthesis assembly with an embedded metal column rod, and belongs to the technical field of medical instruments. The defect that in the prior art, long-term abrasion of a traditional tibia liner prosthesis assembly causes failure of a PS type prosthesis tibia liner stand column and further causes fracture of the tibia liner stand column is overcome. A main body structure of the tibia pad comprises a plastic cover cap, a metal column rod, a tibia pad main body and a base cover cap, the upper end of the metal column rod is provided with an inner taper hole used for being connected with the plastic cover cap in an assembled mode and an outer thread used for being connected with the base cover cap, and the tibia pad main body is provided with a tibia pad main body stepped hole and a bottom inner hole which are communicated with each other; an internal thread hole in threaded connection with the external thread is formed in the base cover cap, the metal column rod is assembled and connected with a tibia liner main body stepped hole in the tibia liner main body, and the base cover cap is assembled and connected with a bottom inner hole in the tibia liner main body. The total knee joint replacement device is mainly used for total knee joint replacement.

A total knee prosthesis system that includes a guide having first and second wedges each having a thickness configured to be located between the tibial and femoral component. When the first and second wedges are located between the tibial and femoral component, the first and second wedges align the first axle opening of the tibial component with the second axle opening of the femoral component for receipt of an axle. The guide includes a guide recess extending between the first and second wedges and a post extending into the guide recess. The guide also includes a bridge connected to and extending between the first and second wedges such that the bridge at least partially defines the guide recess.

A total knee prosthesis, composed of a femoral and a tibial component that articulate with each other, capable of restoring normal joint function. The articulation between the two components is controlled by four guide surfaces.

This invention provides a tibial liner and a total knee prosthesis. The tibial liner includes a medial liner and a lateral liner. The medial liner is used to engage with the medial condyle, and the lateral liner is used to engage with the lateral condyle. The cross-sectional line formed by the intersection of the articular surface of the medial liner and the sagittal plane includes a first arc segment and a second arc segment, with the second arc segment located posterior to the first arc segment. The sagittal radius of the first arc segment is smaller than that of the second arc segment. The first arc segment includes a functional area that is used to contact the medial condyle during translation and rolling of the femoral prosthesis. The tibial liner provided by this invention effectively reduces the posterior height of the medial liner, allowing the knee prosthesis to rotate stably around the medial side. It also reduces wear on the knee prosthesis and prevents the posterior side of the medial liner from affecting further posterior rolling of the medial condyle during high flexion movements, thus improving the high flexion performance of the knee prosthesis.

The utility model discloses a multifunctional tibia pad test mold holder, and belongs to the technical field of medical instruments. The defect that in the prior art, during traditional total knee joint replacement, a tibia liner prosthesis test mold is high in cost is overcome. A main body structure of the device comprises a main body handle, a sliding block, a connecting column, a connecting piece, a thickness adjusting knob, a base test mold and a liner test mold, the sliding block is installed on the main body handle in a sliding mode, and the thickness adjusting knob penetrates through the main body handle and then is connected with the bottom of the sliding block; the lower end of the connecting column is installed in an installation hole in the sliding block, and the upper end of the connecting column penetrates through the conversion knob and then is connected with the connecting piece. The base test mold is installed at the end of the main body handle, the liner test mold is connected with the connecting piece, and the height H between the liner test mold and the base test mold is the thickness of the tibia liner test mold. The total knee joint replacement device is mainly used for total knee joint replacement.