33 results about "Total knee" patented technology

The invention provides a multi-disease artificial intelligence surgical robot system for the whole orthopedics department, and the system comprises a total hip joint replacement module which is used for preoperative planning, intraoperative total hip joint replacement and real-time display; the total knee joint replacement module is used for preoperative planning, intraoperative total knee joint replacement and real-time display; the unicondylar joint replacement module is used for preoperative planning, intraoperative unicondylar joint replacement and real-time display; the acetabulum periphery osteotomy module is used for pre-operation planning, acetabulum periphery osteotomy during operation and real-time display; the sports medicine module is used for bone tunnel planning and ligament reconstruction and real-time display; the spine screw placement positioning navigation module is used for positioning navigation and real-time display of intraoperative spine screw placement; and the trauma positioning and navigation module is used for performing trauma positioning and navigation and real-time display during operation. According to the embodiment of the invention, the auxiliary operation can be quickly and accurately carried out.

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.

Cutting guide device for cutting the distal end of the femur prior to knee replacement and method for manufacturing at least a part of said device. The invention relates to a cutting guide device (1) for the distal end (21) of the femur (2), said device (1) comprising a first (3) and a second part (4) that can be assembled to define a cutting plane for said end (21). Said second part has a slot (5) for a blade and means for cooperating with said first part, which includes a plate (8) constituting a support surface tangent to the femoral condyles, provided with a guide pin (9) for a point, said first part having means (14) for securing the second (4) to the first (3) such that the parts are in perpendicular planes and the slot is oriented perpendicular to the femoral mechanical axis KH. Fig. 3

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 utility model discloses a total knee joint prosthesis tibia pad test mold structure which comprises a pad test mold piece and an insertion piece assembly, the pad test mold piece comprises a base and a base platform protruding out of the base, and a basic insertion groove is formed in the base platform; the insertion piece assembly comprises an insertion piece, the insertion piece comprises an insertion plate and wing plates arranged on the two sides of the insertion plate, the insertion piece assembly is matched with a basic insertion groove of the liner test mold piece based on the insertion plate, after the insertion piece assembly is matched with the liner test mold, the wing plates and the base table are stacked mutually to form the stacking thickness of the liner test mold structure, and the stacking thickness is adjusted based on the thickness of the wing plates; after the insertion piece assembly is matched with the liner test mold, the stacking thickness is matched with the target required thickness of the tibial plateau test piece, and the stacking thickness can be adjusted, so that the target required thickness of the tibial plateau test piece can be conveniently adapted according to the use requirement; the problem that a knee joint pad prosthesis with the proper thickness needs to be selected according to the flexion and extension gap, and accordingly a corresponding prosthesis is made for a pad with each thickness is solved, and cost is reduced.

The invention relates to a knee prosthesis (1) comprising a bearing element (100) for a femoral implant of a total knee prosthesis, which is intended to be positioned on the tibial side and comprises an upper surface (41) on which a medial cavity (18) for receiving the medial condyle and a lateral cavity (19) for receiving the lateral condyle are arranged, wherein the medial cavity (18), viewed from above, has an ovoid shape with a mediolateral minor axis and an anteroposterior major axis, wherein the cavities (18, 19) have a concave profile and are separated by a raised region (20) located on the upper surface (41) between the two cavities (18, 19), which raised region extends in a horizontal plane along a curved generatrix having a concavity (180) oriented towards the medial cavity (18), wherein the raised region (20) has, along its generatrix, a convex outer profile, and wherein the lateral flank (209) of the raised region (20) has, in the horizontal plane, a radius of curvature greater than the radius of curvature of the medial flank; the invention also relates to any corresponding total knee prosthesis.

The present invention relates to a pad for repairing bone defects in total knee revision surgery, belonging to the technical field of orthopedic medical devices, and comprising a main body, wherein the main body is a porous structure, and the porosity of the main body along the length direction of the tibia increases gradually from the tibial tray to the bone bed, and the porosity of the main body along the radial direction of the tibia increases gradually from the cortical bone to the medullary cavity. The present invention arranges the main body in the bone defect area between the tibial tray and the tibial bone bed, so that the main body fills the bone defect and supports the tibial tray, and then utilizes the porosity of the main body to increase gradually from the tibial tray to the bone bed and from the cortical bone to the medullary cavity, so that the porosity of the pad changes in a bidirectional gradient, and the bidirectional gradient porosity realizes a porous structure with adaptive elastic modulus, so that the elastic modulus of different areas where the pad contacts the bone bed are matched, which satisfies the support for the prosthesis while effectively alleviating the stress shielding effect.

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 invention relates to a method for constructing at least one femoral component (101) comprising at least the preparatory steps of: - constructing a three-dimensional model of a patient's femur from digital medical images; - determining a cutting template from morphometric data identified in the three-dimensional model; - sectioning the three-dimensional model into several working sections distributed in different planes and defined by a set of geometric points; - obtaining in the several working sections geometric variables defining a mediolateral width, a medial femorotibial contact surface, a lateral femorotibial contact surface, and a femoropatellar contact surface; said construction method subsequently comprising a step of constructing at least one femoral component from the cutting template and the geometric variables.Figure from the summary: Figure 2.

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.

The utility model discloses a distraction device in an artificial total knee arthroplasty, which relates to the technical field of medical equipment and is characterized in that a straight handle, a crank and a grab handle are arranged, so that when two splints are attached and clamped on two sides of a thighbone, the two splints can be distrained; the straight handle, the crank and the grab handle form a U-shaped structure with an outwards-expanded opening, a large operable space can be provided for the middle of the femur, the total knee joint of a patient can be conveniently installed and operated, medical staff can operate the grab handle to drive the rotating disc to rotate through the crank and the straight handle, and therefore the angles of the straight handle, the crank and the grab handle are adjusted, and operation is convenient. More space is reserved above the thighbone, so that the surgical operation of the artificial total knee arthroplasty is facilitated; through the arrangement of the connecting ball, the angle between the clamping plate and the connecting disc can be automatically adjusted, so that the clamping plate can be better attached to different parts of the thighbone of the patient, and subsequent installation of the artificial total knee joint is facilitated.

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 present invention relates to a total knee prosthesis made of solid ceramic comprising a femoral element (1), a tibial plateau (3), and a movable plateau (2) forming two joints, as well as a pin (5) for stabilising the movable plateau thereof, for limiting post-surgery movements before natural fibrous tissue has formed, and for ensuring optimum clearance between the different ceramic surfaces. The prosthesis also has: • - mutual friction surfaces that are entirely made of the same ceramic material and two condylar cups (21) on the upper portion of the movable plateau; and • - two condyles (11) on the femoral element that each comprise mutual friction surfaces between which there is a clearance of less than 100 μm when the longitudinal axes of the femoral element and of the tibial plateau form an angle a of between 0° and 75°.

The utility model relates to a femoral condyle prosthesis beater with an adjustable angle. The femoral condyle prosthesis beater comprises a cushion block, a connector, a connecting rod and a base. The end face of the cushion block acts on the femoral condyle prosthesis. The connector is arranged at the other end of the cushion block, an opening is formed in the connector, and a through hole is formed in the connector; one end of the connecting rod is arranged in the opening and rotationally connected with the connector; a threaded hole is formed in one end of the connecting rod, the threaded hole and the through hole are connected with a bolt, the bolt is used for locking the connecting rod and the connector, and the base is arranged at the other end of the connecting rod; the beating device can adjust the angle between the connecting rod and the connector according to needs, and in the process of beating and implanting the bone condyle prosthesis, stress on the inner side and the outer side can be different, so that the thicknesses of bone cement on the inner side and the outer side are different, the size of gaps between the inner side and the outer side of the knee joint is adjusted, the gaps between the inner side and the outer side of the knee joint are equal, and the stability of the total knee joint is improved.

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.

To provide a knee prosthesis that is much better adapted to the need of any individual patient, thereby reducing the risk of chronic pains and / or discomfort.SOLUTION: A femoral prosthesis comprises: (a) two condylar portions comprising the medial and lateral condyles, having a bone-facing surface for abutting at least a part of each condyle and an articular surface opposite each bone-facing surface, each articular surface having a J-curve in a sagittal plane and an ML curve in a frontal plane and transverse planes; each articular surface having a condylar offset; (b) a trochlear portion, comprising a trochlear depth as well as lateral and medial trochlear elevations, having a bone-facing surface and an articular surface, each articular surface having a J-curve in a sagittal plane and an ML curve in a frontal plane and transverse planes; (c) the articular surface orientations of the distal and posterior condylar portions and the trochlea portion are independent and are mutually parallel or obliquely oriented (convergent or divergent).SELECTED DRAWING: Figure 21A

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 invention belongs to the technical field of medical instruments, and provides a device for evaluating total knee joint tissue balance, which comprises a shell, a base connected with the bottom of the shell and a thickness adjusting gasket connected with the bottom of the base, and a strain gauge, a circuit mainboard and a battery are arranged in the shell; the shell comprises an upper shell body used for being matched with a prosthesis and a lower shell body fixedly connected with the upper shell body, and the upper shell body comprises a left upper half shell body, a right upper half shell body and a middle connecting part, wherein the left upper half shell body and the right upper half shell body are made of medical hard materials, and the middle connecting part is connected with the two upper half shell bodies and made of medical soft materials. The left side and the right side of the lower surface of the lower shell are provided with two sets of stress points corresponding to the two upper half shells respectively, and each stress point is provided with a strain gauge in a one-to-one correspondence mode. The upper shell matched with the arc-shaped prosthesis is divided into three parts, the two upper half shells on the left side and the right side transmit force through hard rubber, the middle connecting part is made of soft rubber, mutual restraint of the two sides is avoided, mutual influence of the left side and the right side is effectively reduced, and the accuracy of tension measurement of the left side and the right side is improved.

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.

The invention relates to the technical field of postoperative patient walking assisting, and discloses a total knee replacement postoperative patient walking assisting method with a hexapod robot as a prototype, and the method comprises the steps: collecting the height and hip joint height of a patient; based on the height of the patient and the hip joint height, the walking height of the walking aid is dynamically adjusted by controlling the prediction model; the front terrain environment is recognized through the sensor assembly, so that the walking aid executes the procedures of advancing on the flat ground, climbing steps and going down stairs. The problems that a traditional walking aid is poor in universality and limits the movement range of a patient are solved, and the movement stability of the patient, the comfort of a user and the mechanical safety are improved.

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.