40 results about "Tibial tray" patented technology

The invention provides a knee joint prosthesis tibial plateau capable of enhancing fixation and a tool matched with the tibial plateau, the knee joint prosthesis tibial plateau specifically comprises a tibia support, the tibia support is of a hollow cylinder structure, and three convex bodies are fixedly arranged on the outer surface of the tibia support; a groove penetrating into the tibia support is formed in the abutment, and the abutment is fixedly arranged on the tibia support; the pushing device comprises extension rods arranged at the two ends of a worm, the worm with threads arranged on the outer surfaces of the two ends, turbines arranged on the two sides of the worm, upper supporting bodies arranged at the tops of the turbines and connected with the fixing device through first connecting bodies, and lower supporting bodies arranged at the bottoms of the turbines and connected with the fixing device. The fixing device is a hollow cone, a first spring is arranged in the fixing device, one end of the first spring is connected with the first connector, and the other end of the first spring is connected with a fixing block. According to the technical scheme, the technical problem that after the knee joint prosthesis is implanted into the tibia, the tibial plateau is unstable, the prosthesis is loosened and disengaged, and then bone fusion is affected is effectively solved.

According to one example, a for revision knee arthroplasty is disclosed. According to this example, the method can include shaping a bone of a patient to create one or more recesses therein, selecting a stem provisional, disposing the stem provisional within the one or more recesses, and assembling in vivo the stem provisional with both a first provisional component configured to simulate a shape of one of a tibial tray implant or a femoral implant and a second provisional component configured to simulate a shape of at least one of a sleeve component, a cone component or a keel component of an implant.

Knee arthroplasty implants, instruments, systems, and methods of implanting the same. The knee arthroplasty implants may include a femoral implant and a tibial tray implant, each with trabecular surfaces configured to contact bone to provide a scaffold for bone healing and interdigitation. The implants may also include fixation pegs with bulleted profiles to increase the surface area for bone ingrowth. An inserter instrument may include a sliding rack, which is incrementally extended with a rotatable shaft, thereby allowing for quick lock and release of various tibia trays.

The application provides a knee joint prosthesis tibial plateau capable of enhancing fixation and a matching tool, and specifically comprises: a tibial tray, which is a hollow cylindrical structure and is externally provided with three convex bodies; a base, which is provided with a groove penetrating into the tibial tray and is fixed on the tibial tray; a pushing device, which comprises: an extension rod arranged at both ends of a worm, a worm with threads arranged on the outer surface of both ends, a turbine arranged at both sides of the worm, an upper support body arranged on the top of the turbine and connected with a fixing device through a first connecting body, and a lower support body arranged at the bottom of the turbine and connected with the fixing device; and the fixing device is a hollow cone, which is internally provided with a first spring, one end of the first spring is connected with the first connecting body, and the other end is connected with a fixing block. The technical scheme of the application effectively solves the technical problem that after the knee joint prosthesis is implanted into the tibia, the tibial plateau is not stable, the prosthesis is loose and comes off, and bone fusion is affected.

The utility model provides a marking support block for auxiliary marking of a forge piece tibia support, and belongs to the technical field of metal forging machine manufacturing. Comprising a marking supporting block body, the upper surface of the marking supporting block body is provided with a multi-plane type cavity, the multi-plane type cavity is composed of a plurality of cavity planes matched with forgings of different specifications, and the multiple cavity planes form a step-shaped structure from bottom to top and from small to large. The multi-plane type cavity is matched with forgings of different specifications, the universality is good, rapid positioning and ejection are achieved by combining the lower bottom face groove cavity, the problems that in traditional marking, positioning is not accurate, and efficiency is low are solved, the structure is simple, operation is convenient and fast, and marking precision and efficiency are remarkably improved.

An orthopaedic surgical instrument for use during a surgical procedure to implant a tibial tray into a surgically-prepared proximal end of a tibia and a femoral component into a surgically-prepared distal end of a femur is disclosed. The surgical instrument includes a metallic impaction handle and a removable polymeric impaction insert.

To provide knee arthroplasty trials, systems, and related methods.SOLUTION: A knee arthroplasty trial system may include an expandable tibial tray trial having top and bottom plates, an actuation screw retained in the bottom plate, and an expansion ramp configured to slide along the bottom plate and lift the top plate as the ramp translates forward. The actuation screw may define a helical cut with step portions, and the expansion ramp may include a pin configured to engage the helical cut of the actuation screw. When the actuation screw is rotated, the pin rides along the helical cut and is configured to rest within one of the step portions, thereby ensuring that the expandable tibial tray trial expands only to discrete thicknesses.SELECTED DRAWING: Figure 1

This invention provides a high-strength tibial support with osteoinductive properties and its preparation method. The preparation method involves preparing a reinforcing material and a matrix material; fabricating a multi-porous metal tibial support skeleton from a biodegradable metal material; placing the prepared multi-porous metal tibial support skeleton and the matrix material into a mold cavity; uniformly filling the pores of the multi-porous metal tibial support skeleton with the matrix material; and then pressing and molding the skeleton through the mold cavity. After pressing and molding, a semi-finished tibial support is obtained, which is then subjected to high-temperature sintering to obtain a high-strength tibial support with osteoinductive properties. This invention solves the technical problems of existing tibial support fixation methods using bone cement and bio-type fixation, which lead to bone cement particles easily entering the pulmonary circulation through the bloodstream and poor adhesion between the bio-coating and the prosthesis, resulting in coating detachment during embedding. This invention can be widely applied to the preparation of high-strength tibial supports with osteoinductive properties.

The invention relates to the technical field of medical instruments, in particular to a 3D (three-dimensional) biological knee joint and a preparation method thereof.The 3D biological knee joint comprises a femoral condyle component, a tibia support component, a meniscus component and a patella component; according to the method, individualized knee joint data of a patient is obtained through CT / MRI scanning, reverse modeling is conducted in combination with Mimics software, a precisely-matched prosthesis three-dimensional model is generated, and the success rate is increased; based on specific anatomical features of a patient, adaptability errors of a traditional standardized prosthesis are avoided, operative wounds are reduced, and the initial stability of the prosthesis and a bone interface is improved. According to the invention, through the combination of technological processes such as individualized modeling, gradient functional coating, multi-process printing and post-treatment, the defects of a traditional knee joint prosthesis are overcome, and the properties such as remarkably improved biocompatibility, excellent antibacterial property, optimized mechanical matching property and accurate individualized adaptation are improved.

The invention discloses an additive-manufactured biological tibia tray prosthesis and a manufacturing method thereof, and relates to the technical field of artificial knee joint prostheses. The biological type tibia support prosthesis comprises four types: a biological type symmetrical tibia support, a biological type symmetrical stemless tibia support, a biological type anatomical tibia support and a biological type anatomical stemless tibia support. The prosthesis mainly comprises a support body, a porous structure, a plug pin and the like, and is integrally formed through an additive manufacturing technology, so that the precision and the strength are ensured. The porous structure is designed to be in an irregular space three-dimensional grid shape, the thickness ranges from 0.6 mm to 1.6 mm, and the porous structure is used for promoting bone trabecula ingrowth and achieving biological fixation. The positioning nail adopts a bullet-shaped design and is provided with an exhaust groove and a notch, so that the installation is simplified and the stability is enhanced. The manufacturing method comprises the steps of design modeling, stress optimization, additive manufacturing and aftertreatment, and the prosthesis is made of a titanium alloy material and meets related international standards. The invention has the advantages of simple installation, reliable fixation, good bone ingrowth effect and the like.

The application belongs to the technical field of medical devices, and provides a single-knee prosthesis tibial tray and a mounting method, which comprises a prosthesis tibial tray body, a support wing and a support column are arranged on the prosthesis tibial tray body; the support wing is connected with the side wall of the prosthesis tibial tray body, and the support wing is embedded into the non-cutting side of the tibia; the support column is connected with the lower end of the prosthesis tibial tray body, and the support column is embedded into the tibia below the tibial bone cutting surface. The above scheme sets the support wing and the support column on the prosthesis tibial tray body, supports and fixes the prosthesis from two different positions and different directions of the side wall and the lower end, respectively, disperses and transmits the load borne by the prosthesis to the larger bone area of the tibia, effectively increases the stress area, avoids the load concentration in the local area of the tibial cutting surface, and reduces the fracture risk of the tibial cutting surface.

The utility model relates to the field of knee joint prostheses, in particular to a knee joint prosthesis with a reinforcing structure, which comprises a tibia support, a prosthesis body and a first fixing rod, a second fixing rod is arranged at the bottom of the tibia support, a mounting seat is embedded in the middle of the prosthesis body, and the bottom of the first fixing rod is fixedly connected with the top of the mounting seat. The tibia support and the prosthesis body are in implantation connection with knee joint bones of a patient through a second fixing rod and a first fixing rod respectively, the tibia support and the prosthesis body are rotationally connected through a first connecting piece and a second connecting piece, and a rubber column is fixedly installed at the bottom of the cylinder, installed in the sleeve in a clamped mode and capable of moving up and down in the sleeve. The knee joint of a patient can be bent conveniently, flexibility is higher, the tibia support and the prosthesis body are tightly connected and attached to each other through the first connecting piece and the second connecting piece, and loosening and falling are prevented.

A tibial prosthesis system for knee arthroscopy may include a tibial tray having an anterior portion, a posterior portion, a bone facing surface, a joint facing surface, and a central aperture. The tibial prosthesis system may also include a clip configured to be slidably received in the central aperture. The posterior portion may include a posterior notch. The central aperture may extend posteriorly from the anterior portion, and from the bone facing surface to the joint facing surface. At least a portion of the joint facing surface may extend between the central aperture and the posterior notch.

The application discloses a tibial tray prosthesis, which comprises a tray body and a connecting piece, the tray body has a proximal bone side of a connected end face facing a tibia and a distal bone side of a connected end face facing away from the tibia, the connecting piece is arranged in the tray body along the direction from the distal bone side to the proximal bone side, the connecting piece has an arc-shaped part, the center line of the longitudinal section of the arc-shaped part is arc-shaped, and the arc-shaped part is used for moving from the distal bone side to the proximal bone side of the tray body so that the arc-shaped part is inserted into the tibia. By adopting the scheme, tibial cortical damage caused by slotting on the front side of the tibia can be avoided, and the operation is simplified. The arc-shaped part can move along the arc-shaped center line, which is beneficial to the insertion process of the arc-shaped part. The arc-shaped part can improve the stability of the prosthesis in the vertical direction and the front-back direction.

The present invention relates to a pad for tibial bone defects, which belongs to the field of bone implantation technology. The pad comprises a main body that is pressed into the bone defect area on the inner posterior side of the tibial plateau, one side of the main body is an arcuate surface, the main body is fixedly connected to the tibial tray, the main body is a porous structure, 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 utilizes the arcuate surface on the main body to match the morphology of the bone defect on the inner posterior side of the tibial plateau, so as to avoid cutting off too much normal bone, the porosity of the main body with a porous structure increases gradually from the proximal end to the distal end of the tibia along the length direction of the tibia, and the porosity along the radial direction of the tibia increases gradually from the bone cortex to the medullary cavity, the pad fits the elastic modulus of the surrounding bone tissue, effectively reduces stress shielding, can effectively support the tibial tray, and avoids various complications such as prosthesis loosening and displacement after surgery.

This invention discloses a tibial implant (100). In one embodiment, the tibial implant includes a tibial support (120) and a support member (140), the support member being arranged and configured to be at least partially positioned within the intramedullary canal of a patient's bone. In some embodiments, the tibial implant may further include one or more pins (180) located anteriorly on the bottom surface of the support and one or more bridging members (190) for engaging the pins to the support member such that loads received by the pins are transferred to the support member via bridging members. Additionally and / or alternatively, the tibial implant may include one or more chamfered or load-bearing areas (200) for elongating the transition region between the support member and the bottom surface of the tibial support to extend the area where the load is transferred.

A knee replacement system, comprises: a tibial liner; a tibial tray with an upper surface and a lower surface, the lower surface comprising an external frustrum surface, wherein the upper surface of the tibial tray comprises a locking mechanism for engaging with the tibial liner; a coupling device, including a proximal morse taper located at an upper end that defines an internal frustrum space that engages with the external frustrum surface of the lower surface of the tibial tray, a morse taper wall that defines an external frustrum surface, and a distal end with a recess adapted to receive a fastener; a metaphyseal cone including an internal wall that defines an internal frustrum cavity for engaging with the external frustrum surface of the coupling device; and a tibial stem including a threaded end fastened to the distal end of the coupling device.

A position adjustment device having a tool holder is locked to at least two pins projecting from respective anterior facing locations near a distal end of a tibia of a patient. The position adjustment device is adjusted. The position adjustment device is locked with the tool holder at first coordinates in the proximal-distal and medial-lateral directions. The distal end of the tibia is resectioned with a tool positioned on the tool holder, while the tool holder is in the first coordinates in the proximal-distal and medial-lateral directions. The tool is removed from the tool holder. A tibia trial is placed on the resectioned tibia using the tool holder, while the tool holder is in the first coordinates in the proximal-distal and medial-lateral directions. The tibia trial has a size and shape of a tibial tray of an ankle replacement system.

The invention provides a degradable magnesium alloy reinforced polymer tibia tray and a processing method thereof.The tibia tray is provided with a multi-filling-hole metal tibia tray framework, the multi-filling-hole metal tibia tray framework comprises a tibia tray supporting column and a tibia tray platform, and the tibia tray platform is located at the upper end of the tibia tray supporting column; the multi-filling-hole metal tibia support framework is formed by interweaving silk threads, filling holes are formed between the mutually-interwoven silk threads, the silk threads are made of degradable metal materials, the filling holes are filled with high polymer materials, the outer portion of the multi-filling-hole metal tibia support framework is wrapped with a layer of high polymer materials, and a concave arc groove is formed in one side of the tibia support platform. The degradable metal material is corroded and degraded by body fluid in the body, and the left high polymer material structure reserves a space for the ingrowth of bone tissues. The tibia support is prepared by mixing a degradable metal material and a base material, the material does not need to be matched with bone cement for use, and surrounding tissues and nerves cannot be damaged. The medical tibia support can be widely applied to medical tibia supports.

A tibial prosthesis system for knee arthroscopy may include a tibial tray having an anterior portion, a posterior portion, a bone facing surface, a joint facing surface, and a central aperture. The tibial prosthesis system may also include a clip configured to be slidably received in the central aperture. The posterior portion may include a posterior notch. The central aperture may extend posteriorly from the anterior portion, and from the bone facing surface to the joint facing surface. At least a portion of the joint facing surface may extend between the central aperture and the posterior notch.

An orthopaedic prosthesis including a tibial tray is disclosed. The tibial tray includes a distal pocket and a plurality of inner pockets. Each inner pocket includes a channel sized to receive bone cement. The tibial tray includes distal-facing surfaces that have a surface roughness (Ra) equal to about 5.0 microns.

The invention provides a degradable zinc alloy reinforced polymer tibia tray and a processing method thereof.The tibia tray is provided with a multi-filling-hole metal tibia tray framework, the multi-filling-hole metal tibia tray framework comprises a tibia tray supporting column and a tibia tray platform, and the tibia tray platform is located at the upper end of the tibia tray supporting column; the multi-filling-hole metal tibia support framework is formed by interweaving silk threads, filling holes are formed between the mutually-interwoven silk threads, the silk threads are made of degradable metal materials, the filling holes are filled with high polymer materials, the outer portion of the multi-filling-hole metal tibia support framework is wrapped with a layer of high polymer materials, and a concave arc groove is formed in one side of the tibia support platform. The degradable metal material is corroded and degraded by body fluid in the body, and the left high polymer material structure reserves a space for the ingrowth of bone tissues. The tibia support is prepared by mixing a degradable metal material and a base material, the material does not need to be matched with bone cement for use, and surrounding tissues and nerves cannot be damaged. The medical tibia support can be widely applied to medical tibia supports.

The invention discloses a porous tibial prosthesis with a gradient porous structure and a preparation method of the porous tibial prosthesis. Comprising a tray and a handle part, the handle part comprises an internal discrete gradient porous core body and an external solid shell, and a plurality of circular windows are further formed in the solid shell; the preparation method comprises the following steps: establishing a basic digital model of the tibia support prosthesis by using three-dimensional modeling software; importing the basic digital model into implicit modeling software, generating a three-period minimal curved surface lattice structure in the internal space of the solid shell, and forming a digital model of the discrete gradient porous core body; performing Boolean union operation on the generated discrete gradient porous core digital model and the entity shell digital model to obtain a complete prosthesis digital model; a metal additive manufacturing technology is adopted, medical titanium alloy powder is used as a raw material, and a prosthesis digital model is integrally printed and formed. According to the method, the advantages of parameterized CAD software and implicit modeling software are combined, and efficient and accurate design of the complex gradient porous structure prosthesis is achieved.

The application provides an anti-dislocation ankle joint tibial prosthesis assembly, and belongs to the technical field of orthopedic medical instruments. The anti-dislocation ankle joint tibial prosthesis assembly comprises an ankle joint tibial prosthesis assembly and an auxiliary positioning assembly used for assisting in installation of the ankle joint tibial prosthesis assembly. The ankle joint tibial prosthesis assembly comprises a tibial tray, an embedded part and a chamfered cutting talus part. The embedded part is located between the tibial tray and the chamfered cutting talus part. The tibial tray and the bottom side outer wall of the chamfered cutting talus part are symmetrically provided with installation columns used for installation of tibia and talus. Each installation column is internally provided with an anti-dislocation limiting part. The embedded part and the chamfered cutting talus part are provided with an anti-dislocation self-resetting structure near the outer edge. The hollow installation column cooperates with the innovative design of the expansion limiting part, and is combined with a nickel-titanium memory alloy material, so that the prosthesis fixing stability is significantly improved. The unique self-resetting structure can effectively prevent dislocation, reduce the need for secondary surgery, and improve the postoperative life quality of patients.

According to the porous tibia cushion block, a shaft rod and a porous structure on the periphery of the shaft rod are formed into an integrated structure through the 3D printing technology, the shaft rod serves as a main force bearing structure, stress is optimized, stress is prevented from being concentrated in the porous structure, and the overall mechanical performance is improved. In addition, the shaft rod further serves as a limiting assembly of the bone cement, the action range of the bone cement between the cushion block and the tibia support is limited, and the bone cement syndrome caused by the fact that the bone cement is released into the body is effectively avoided.

The invention relates to a tibial tray (20) having a distal surface (D), in which a tibial tray shaft structure (21) extends away from the distal surface (D) in a distal direction (DD), in which the tibial tray structure (21) comprises at least three shaft wall elements (22, 23, 24, 25), the at least three shaft wall elements (22, 23, 24, 25) are arranged relative to each other in such a way that a cross-section of the at least three shaft wall elements (22, 23, 24, 25) in a plane perpendicular to the distal direction (DD) is at least a T-shaped, Y-shaped or X-shaped cross-section, and an area (F) of the cross-section decreases strictly monotonically from the distal surface (D) in the distal direction. The invention further relates to an artificial knee joint.

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 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.

This application relates to the technical field of medical devices, and in particular to a composite ceramic knee joint prosthesis and its manufacturing process, comprising a tibial support, a tibial pad, and a femoral condyle. The tibial pad is disposed on the tibial support, and the femoral condyle is disposed on the tibial pad. The femoral condyle and the tibial support are made of titanium alloy or cobalt-chromium-molybdenum alloy. The surfaces of the femoral condyle and the tibial support adjacent to the tibial pad are the outer surfaces, and the outer surfaces of the femoral condyle and the tibial support are respectively coated with a ceramic coating. The tibial pad is made of highly cross-linked ultra-high molecular weight polyethylene mixed with vitamin E. This application has the effect of reducing the possibility of prosthesis wear and failure.

The embodiment of the invention is applicable to the technical field of computer-aided medical technology and surgical planning, and provides an intraoperative planning device for a single condylar surgery on a movable platform and computer equipment, the device comprises a display unit for displaying an image of a surgical site, the image comprises a top view of the movable platform displayed in a simulation manner, and the top view of the movable platform is used for displaying the image; the movable platform is composed of a tibia support prosthesis and a tibia pad prosthesis capable of moving on the surface of the tibia support prosthesis. The monitoring unit is used for monitoring the movement track of the tibia pad prosthesis on the surface of the tibia support prosthesis in the process of assisting the knee joint movement of the patient, and the movement track is displayed through the display unit; and the planning unit is used for performing intra-operation planning of a single-condyle operation based on the motion trail of the tibia pad prosthesis. By the adoption of the device, the movement track of the tibia support prosthesis of the movable platform can be monitored in the unicompartmental condyle surgery, then intraoperative surgery planning is achieved, and the safety and reliability of a planning scheme are guaranteed.