20 results about "Tibial tray" patented technology

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.

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.

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

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.

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.

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 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 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 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.

The utility model provides a tibia component locking structure which comprises a tibia liner and a tibia support, the upper surface of the tibia support is provided with a front limiting boss and a rear limiting boss located behind the front limiting boss, and an inclined guide face and a front bayonet located below the inclined guide face are formed on the outer edge of the rear side of the front limiting boss; the tibia liner is provided with a front positioning groove and a rear positioning groove, a front buckle is arranged in the front positioning groove, and an arc-shaped guide surface is arranged at the tail end of the front buckle; rear buckles are arranged on the groove walls of the two sides of the rear positioning groove; the front limiting boss is in interference fit with the interior of the front positioning groove of the tibia liner and is clamped in the front bayonet through the front buckle to realize fixation; the rear limiting boss is in interference fit with the interior of the rear positioning groove of the tibia liner and is clamped in the rear bayonet through the rear buckle to realize fixation; and rapid implantation and stability improvement are facilitated.

A knee prosthesis (e.g., a tibial implant or component) is disclosed. In one embodiment, the tibial implant includes a load bearing component (e.g., a tibial tray) and a support member arranged and configured to be at least partially positioned within an intramedullary canal of a patient's bone. In some embodiments, the tibial implant may also include one or more pegs positioned anteriorly on a bottom surface of the tray and one or more bridges for coupling the pegs to the support member so that loads received by the pegs are transferred to the support member via the bridge. In addition, and / or alternatively, the tibial implant may include one or more chamfers or loading zones for elongating the transition area between the support member and the bottom surface of the tibial tray to extend the area over which the load is transferred.

The invention provides an inclined nail type ankle joint tibia support assembly and an ankle joint prosthesis, and relates to the technical field of medical instruments. The tibia support assembly comprises a tibia support body, a cylindrical fixing nail, a plum blossom fixing nail and a tibia liner locking structure. The non-nail-head part of the cylindrical fixing nail is of a second 3D printing porous structure to facilitate bone ingrowth, and the whole plum blossom fixing nail is of a third 3D printing porous structure to facilitate bone ingrowth; the tibia liner locking structure comprises a liner containing groove which is used for rapidly assembling the tibia liner. The mounting efficiency is improved; according to the scheme, the tibia support prosthesis assembly is improved, and the bone connection stability is improved.

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 bullet type ankle joint tibia support assembly and an ankle joint prosthesis, and relates to the technical field of medical instruments. The tibia support assembly comprises a tibia support body, a keel, a connecting wall and a tibia liner locking structure. A first 3D printing porous structure is arranged on each of the bone joint top plane and the bone joint side surface; a second 3D printing porous structure is arranged on the surface of the keel for bone ingrowth; a plurality of inverted-cone-shaped bone grafting grooves are formed in the top of the keel; the front and rear ends of the connecting wall are of arrowhead structures, so that the tibia support can be conveniently driven in and taken out; the connecting wall is provided with a porous window, and the porous window is provided with a third 3D printing porous structure and penetrates through the thickness direction of the connecting wall for bone ingrowth; the tibia liner locking structure comprises a liner containing groove which is used for rapidly assembling the tibia liner. The mounting efficiency is improved; according to the scheme, the smoothness of inserting the tibia support prosthesis assembly into the tibia is improved, meanwhile, bone ingrowth can be fully achieved through the bone section of the prosthesis after installation, and long-term stability of the prosthesis and the bone is improved.

The application discloses a tibial tray prosthesis assembly and artificial ankle joint prosthesis. The tibial tray prosthesis assembly comprises a tibial tray, a connecting part and a keel. The connecting part is connected with the tibial tray. The connecting part is clamped between the keel and the tibial tray, and the keel has a first main body connected with one side of the connecting part away from the tibial tray and a guide part connected with the first main body in the extension direction of the connecting part. The end of the guide part away from the first main body protrudes outside the extension direction of the connecting part, and the cross section of the guide part perpendicular to the extension direction of the first main body gradually decreases in the direction away from the first main body. Compared with the prior art, the tibial tray prosthesis assembly can be smoothly inserted into the tibia of a patient, and the efficiency of ankle replacement surgery is improved.