73 results about "Transtibial prosthesis" patented technology

A tibial prosthetic implant includes a base or base plate with an offset tibial stem. The base includes an inferior surface adapted to abut a resected surface of a patient's tibia and forms a base for articulating surfaces adapted to articulate with the patient's femoral condyles. The longitudinal center axis of the tibial stem extends from the inferior surface of the base and is offset from a center of the base. The offset places the stem in position to extend into the central canal of the tibia so that it does not substantially interfere with the cortical bone when the inferior surface of the base substantially abuts and aligns with the resected surface of the tibia.

The present invention relates to a tibial prosthesis useful in knee replacement surgeries. The prosthesis includes one or more cement introduction ports which may be used to deliver and control delivery of bone cement to a prosthesis-bone interface after the prosthesis has been positioned on a resurfaced area of a tibia bone. The prosthesis is suitable for implantation using arthroscopic as well as open surgical procedures. The prosthesis may be used as a unicondylar implant in either compartment of the knee or in both compartments of the knee.

The embodiment of the invention provides a total knee arthroplasty preoperative planning method and device, and the method comprises the steps: obtaining a knee joint X-ray film image, and determining the real size of the knee joint X-ray film image; inputting the knee joint X-ray film image into a neural network identification model for identification, and determining key points and key axes; determining femur size parameters and tibia size parameters based on the key points and the key axes; determining types and models of a thighbone prosthesis and a tibia prosthesis based on the thighbone size parameter and the tibia size parameter; and based on the key axis, the type and the model of the femoral prosthesis and the type and the model of the tibia prosthesis, determining placement positions and placement angles corresponding to the femoral prosthesis and the tibia prosthesis. Therefore, according to the embodiment of the invention, the cost can be saved, the randomness of manual measurement is avoided, and an important reference function is provided for calculation of various parameters and placement of the prosthesis, so that the dependence on a surgeon is reduced.

The invention concerns a tibial prosthetic component comprising a plate (100) for forming a tibial plateau of a tibia (16), wherein a peripheral region of the plate (100) has a thickness of less than 3 mm. The invention also concerns a tibial prosthetic component having a keel of depth less than 9 mm. The invention also concerns a method of selecting a tibial prosthetic component comprising receiving measurements of at least one physical attribute of an individual into whom the tibial prosthetic component is to be implanted, selecting a thickness of a plate (100) and depth of keel of the tibial prosthetic component based on the measurements and providing a tibial prosthetic component comprising a plate (100) having the selected thickness and a keel having the selected depth. The invention may also comprise implanting a tibial prosthetic component selected in accordance with this method into an individual and a kit comprising a plurality of prosthetic components comprising plates having different thicknesses with keels of different depths.

The invention relates to a digital design and manufacturing method for a knee joint tibia prosthesis. The method comprises the steps of (1) establishing a knee joint tibia three-dimensional digital model according to medical image data based on the knee joint tibia of healthy people; (2), performing digital simulation of tibia rear end osteotomy according to a knee joint arthroplasty surgery scheme and measuring the design-related geometric parameter of the tibia prosthesis; (3), obtaining the geometric shape parameters of the tibia prosthesises of different genders and models according to the statistical analysis, and drawing the tibia prosthesis design model; (4) manufacturing the knee joint tibia prosthesis according to the tibia prosthesis design model through a 3D (three-dimensional) printing technology. According to the digital design and manufacturing method for the knee joint tibia prosthesis, the tibia prosthesises of different genders and models can be obtained, the prosthesises can be matched with the anatomic form features of different knee joint tibia skeletons of male and female in China, and the coverage rate between the prosthesises and the osteotomy section of the knee joint tibia and the good rate of surgeries are improved.

A method of implanting a lateral unicondylar knee prosthesis in a lateral articulating portion of a femur having a lateral condyle for engagement with a tibia, the method including the steps of: bending a patients knee such that the knee is not in full extension; making an incision through the skin, muscle, and other soft tissue until the damaged bone surfaces are exposed; resecting an end portion of the lateral tibia; resecting an end portion of the lateral femoral condyle; attaching a tibial prosthetic component to the resected end portion of the tibia; attaching a lateral femoral condyle prosthetic component to the resected end portion of the lateral femoral condyle; determining the thickness of a mobile bearing member with the knee in full extension; and inserting the mobile bearing member between the tibial prosthetic component and the femoral prosthetic component.

The present invention relates to a tibial prosthesis useful in knee replacement surgeries. The prosthesis includes one or more cement introduction ports which may be used to deliver and control delivery of bone cement to a prosthesis-bone interface after the prosthesis has been positioned on a resurfaced area of a tibia bone. The prosthesis is suitable for implantation using arthroscopic as well as open surgical procedures. The prosthesis may be used as a unicondylar implant in either compartment of the knee or in both compartments of the knee.

The invention relates to a combined tumor-type ankle joint prosthesis which comprises an ankle bone side component, a polyethylene liner and a top component. Three backward down inclined ridges are formed at the bottom of the ankle bone side component in a projecting manner, an arched sliding surface is formed at the top of the ankle bone side component, a T-shaped projection is transversely arranged at the top of the polyethylene liner, the bottom of the polyethylene liner is recessed inwards to form a joint fossa for containing the sliding surface, the top component is provided with an upper connecting surface for connecting the top component with a tibial prosthesis, a T-shaped groove for containing the projection is transversely formed in the bottom of the top component, five through holes for repairing ligaments on the inner side and the outer side of an ankle joint are formed in the top component in a front and rear penetrating manner, the inner side of the top component extends downwards to form a projecting ridge, and the projecting ridge is abutted to the inner side face of the polyethylene liner. The prosthesis is reasonable in structural design, preparation and surgical operation are facilitated, stability of an artificial ankle joint is enhanced, loading and moving functions of the ankle joint are restored, and the prosthesis is suitable for limb salvage treatment of distal tibial malignant tumors.

Methods for forming prosthetic implants, including femoral implants, are discussed. While the methods can include any suitable step, in some cases, they include providing a master negative mold defining an internal space shaped to form a femoral component configured to replace a distal portion of a femur, wherein the femoral component comprises at least one of: an anterior flange that is disposed at an anterior proximal end of the femoral component, and a proximal extension disposed at a proximal portion of a posterior condyle of the femoral component, the proximal extension comprising a concave articulation surface that is configured to articulate against at least one of: a tibial prosthetic component and a tibia; filling the master negative mold with a molding material to form a molded femoral component; and removing at least one of: the anterior flange, and the proximal extension from the molded femoral component to form a modified molded femoral component. Other implementations are described.

The invention provides a method for positioning longitudinal osteotomy position of tibia in unicompartmental knee arthroplasty, an intramedullary positioning rod and a thighbone drilling guide auxiliary device are used for determining the drilling position of a fixing hole used for mounting a thighbone prosthesis on the thighbone, the fixing hole is prepared under the guiding effect of the thighbone drilling guide auxiliary device, the postartis of the thighbone is cut off, the meniscus is cut off, a thighbone test mold with the appropriate thickness of the distal condyle is selected and installed after bone surface primary forming, the knee joint is bent and stretched repeatedly, and the longitudinal osteotomy position of the tibia is determined through the thighbone test mold. By capturing the motion trail of the tibia joint during relative normal motion, reference is provided for longitudinal osteotomy of the tibia platform, so that the longitudinal osteotomy position of the tibia is determined, the rotation alignment of the tibia prosthesis is closer to the motion trail of the tibia joint, collision between the prostheses is avoided, the motion compatibility and coincidence of the thighbone and tibia prostheses are better, the postartis of the thighbone is preferentially cut off, so that the meniscus on the tibial plateau is cut off more easily, and the collateral ligament is prevented from being damaged.

The invention provides a prosthesis locking assembly for tibia and an artificial knee joint prosthesis, which relate to the technical field of medical instruments, the prosthesis locking assembly comprises a tibia platform, a tibia liner and a fixing part; the tibia liner is clamped on the tibia platform, the movement of the tibia liner is limited, the tibia liner is prevented from moving away from the tibia platform; meanwhile, the fixing part is inserted into a fixing groove defined between the tibia platform and the tibia liner; resistance for preventing the tibia liner from rotating relative to the tibia platform is formed; the tibia liner is fixed on the tibia platform, the problem that in the prior art, a locking structure between a tibia support and the tibia liner is complex is solved. The thin wall and the thin groove can weaken the connection firmness between the tibia support and the tibia liner, abrasion can be caused after long-time use, connection is not firm, and the service life is short are solved, and the technical effects that the locking structure between the tibia platform and the tibia liner is simplified, the connection firmness is improved, and the service life of the tibia prosthesis is effectively prolonged are achieved.

The invention provides an artificial tibia prosthesis and an artificial knee joint, which relate to the technical field of medical instruments, the artificial tibia prosthesis comprises a tibia support, a tibia liner and a connecting part; the tibia liner is clamped on the tibia support; the tibia liner is limited to move away from the tibia support; meanwhile, the connecting part extends into a limiting groove defined between the tibia support and the tibia liner; the resistance for preventing the tibia liner from sliding relative to the tibia support is formed; further, the tibia liner is fixed on the tibia support; the problem that in the prior art, a locking structure between the tibia support and the tibia liner is complex is solved. The technical problems that connection between thetibia support and the tibia liner is weakened through the thin wall and the thin groove, the abrasion is caused after long-time use, and the service life is short are solved, and the technical effectsthat the locking structure between the tibia support and the tibia liner is simplified, and the service life is effectively prolonged are achieved.

A semi-condylar artificial knee joint includes a femoral prosthesis and a tibial prosthesis, and the cross-section of said tibial prosthesis is of a kidney-like type. The tibial prosthesis is disposed at one side of the tibial plateau intercondylar eminence and is located below the femoral prosthesis. The artificial knee joint further includes a locating pin for fixing the tibial prosthesis. The bottom surface of said tibial prosthesis is provided with a prosthetic notch, and below said tibial prosthesis is provided with a tibial notch. Said prosthetic notch corresponds to said tibial notch, and together forming a limiting hole for accommodating the locating pin. The cooperation between the locating pin and the limiting hole can ensure relative position stability and balance between the tibial prosthesis and the tibial plateau intercondylar eminence.

The invention relates to the technical field of medical treatment, in particular to a matching method of a tibial prosthesis and a tibia and a treater. The matching method comprises the following steps: performing operation so as to obtain the image of the tibia, determining the position of a walking surface of the tibia according to the image, determining the upper edge position of the tibial prosthesis according to the position of the walking surface and the thickness of the cartilage of the tibia, selecting a target thickness of the tibial prosthesis, and determining the lower edge positionof the tibial prosthesis according to the upper edge position and the target thickness, wherein the surface, attached to the lower edge position, of the tibia is the mounting surface of the tibial prosthesis; and performing operation so as to obtain the shape and size of the mounting surface, and determining the shape and size of a projection surface of the tibial prosthesis according to the shape and size of the mounting surface, wherein the projection surface is an orthographic projection surface of the tibial prosthesis on the mounting surface. According to the matching method, the mounting position of the tibial prosthesis can be determined, and errors which are caused during model selection of the tibial prosthesis can be reduced.

The invention relates to the technical field of medical instruments, in particular to a tibia pad prosthesis, a tibia prosthesis and an artificial knee joint. The tibia pad prosthesis comprises a tibia pad base body, a CR insert block and a PS insert block; the tibia pad base body comprises a pad top surface and a pad combination surface corresponding to the pad top surface, and the pad combination surface is used for being connected with the tibia support prosthesis; a base body groove is formed in the top surface; the CR insert block can be detachably connected with the tibia pad base body through the base body groove; the PS insert block can be detachably connected with the tibia pad base body through the base body groove. The tibia prosthesis includes the tibia pad prosthesis. The artificial knee joint comprises the tibia pad prosthesis or the tibia prosthesis. The tibia pad prosthesis, the tibia prosthesis and the artificial knee joint are provided so as to achieve conversion between the PS type and the CR type of the tibia prosthesis.

The invention relates to a tibial prosthesis and a knee joint prosthesis comprising the same. The tibial prosthesis is established in a modular manner so as to be able to reduce surgical costs, relieve patient burden, and eliminate micro-motion, thereby eliminating invalidation caused by micro-motion, greatly prolonging service life thereof, and preventing a patient from frequently accepting a replacement surgery.

The invention belongs to the field of medical instruments, and particularly relates to a tibial prosthesis. The provided tibial prosthesis comprises a tibial replacement part and a fixing part, wherein the fixing part is used for fixing the tibial replacement part and a healthy bone in a preset replacement position, and the tibial prosthesis is a 3D-printed tibial prosthesis; and the tibial replacement part comprises a tibia medullary cavity insertion unit, a load-bearing unit and a talus fixing unit which are sequentially connected. According to the tibial prosthesis, the 3D-printed personalized distal tibial prosthesis is designed and placed according to CT data or nuclear magnetism data of an invasion range of a removed focus, compared with allogeneic bones and tibial plates used in theprior art, the tibial prosthesis has good stable reliability, moreover, surgery is more precise, the surgical difficulty and risks are greatly reduced, the surgery time is shortened, and recovery ofa patient is more facilitated; and the defects that in the prior art, during bone reconstruction, quick healing cannot be achieved, and good initial stability and long-term stability cannot be ensuredare overcome, and it is further ensured that the patient has good knee joint functions after the surgery.

The invention provides a single condyle replacement guiding template and a use method thereof. The single condyle replacement guiding template comprises a femur prosthesis guiding template, a tibia prosthesis guiding template and a plurality of first fine connected columns, wherein a femur prosthesis guiding groove is formed in the femur prosthesis guiding template, a cover plate is arranged on the outer side surface of the femur prosthesis guiding template, and a pair of guiding holes is formed in one side of the cover plate; a tibia prosthesis guiding plane is arranged at the upper end of the tibia prosthesis guiding template, and a tibia prosthesis longitudinal guiding groove is formed in one side of the tibia prosthesis guiding plane; and the central axis of the femur prosthesis guiding groove is perpendicular to the tibia prosthesis guiding plane. The single condyle replacement guiding template disclosed by the invention is simple in structure, is made through 3D printing, and isconvenient to joint to skeletons of a patient; and the central axis of the femur prosthesis guiding groove is perpendicular to the tibia prosthesis guiding plane, so that an implanted femur prosthesisand an implanted tibia prosthesis keep perpendicular, the surgery difficulty is reduced, and the surgery accuracy is increased. The use method is simple and easy to operate, and a beginner or a surgeon having little experience can smoothly complete the surgery through the single condyle replacement guiding template.

The invention concerns a tibial prosthetic component comprising a plate (100) for forming a tibial plateau of a tibia (16), wherein a peripheral region of the plate (100) has a thickness of less than 3 mm. The invention also concerns a tibial prosthetic component having a keel of depth less than 9 mm. The invention also concerns a method of selecting a tibial prosthetic component comprising receiving measurements of at least one physical attribute of an individual into whom the tibial prosthetic component is to be implanted, selecting a thickness of a plate (100) and depth of keel of the tibial prosthetic component based on the measurements and providing a tibial prosthetic component comprising a plate (100) having the selected thickness and a keel having the selected depth. The invention may also comprise implanting a tibial prosthetic component selected in accordance with this method into an individual and a kit comprising a plurality of prosthetic components comprising plates having different thicknesses with keels of different depths.

A tibial component placement guide for use in a knee arthroplasty procedure involving a knee joint comprising a tibia, a patella, and a femur, the tibial component placement guide comprising an overlay configured to be overlaid a resected tibia that typifies at least one of a shape and an outline of the resected tibia, the overlay including at least one of an indicia and an opening indicative of at least one of an orientation and a position of a presurgical kinematic axis of at least one of the femur and the patella.

The invention provides a tibial prosthesis. The tibial prosthesis comprises a tibial platform, an extension shank and a transition part. The transition part is arranged between the tibial platform and the extension shank and arranged on the tibial platform in a positional adjustable manner to enable position-adjustable mounting of the extension shank on the tibial platform along the end face of the tibial platform through the transition part. The tibial prosthesis has the advantage that the problem of eccentricity non-adjustability of a tibial prosthesis in the prior art is solved.

The invention relates to the technical field of medical instruments, and in particular relates to a tibial prosthesis with a bone scale line reserved. The tibial prosthesis comprises a near-end prosthesis, a far-end prosthesis and an extension prosthesis arranged between the near-end prosthesis and the far-end prosthesis, an ear plate is connected with one side, far away from the extension prosthesis, of the far-end prosthesis, and a screw hole is formed in the ear plate. The tibial prosthesis has the effect of reducing the influence of tibia far-end osteosarcoma surgery on tibia growth of a child patient.

The invention relates to an artificial knee joint prosthesis. According to the artificial knee joint prosthesis, the concave surface of the femur prosthesis provides a mounting interface with the distal femur, and the convex surface of the femur prosthesis is connected with polyethylene to form the joint; the inner side of the tibia prosthesis provides a locking mechanism for fixing a polyethylene gasket on the inner side, the outer side of the tibia prosthesis adopts the design of a movable platform, and a high-polished surface is adopted, so that a polyethylene gasket on the outer side slides thereon; the upper surface of the polyethylene gasket on the inner side is in hypotaxis with the femur internal condyle, so that a cup-and-ball joint with large volume is formed, the inner-side axial and partial front and back sliding activity is provided, and the lower surface of the polyethylene gasket on the inner side and the inner side of the tibia prosthesis form a locking mechanism; the upper surface of the polyethylene gasket on the outer side forms a cup-and-ball joint with the femur external condyle, complete hypotaxis is formed, the lower surface is movable, through the synergistic effect of tibia metal supports, the several parts realize the physiological kinesiology of ' the internal condyle makes axial movement, and the external condyle rolls backwards' of the femur, so that a patient with the mounted knee joint prosthesis can realize the purpose that the internal condyle makes axial movement, and the external condyle rolls backwards of the femur articular surface on the tibia articular surface in the bending and stretching moving processes, and thus the postoperative functions are improved.

The invention relates to a tibial tray prosthesis. The tibial tray prosthesis is characterized by comprising a front-rear diameter A and a left-right diameter B, wherein the front-rear diameter A is in an increasing trend along with the increase of the left-right diameter B, and the ratio A / B of the front-rear diameter A to the left-right diameter B is in a decreasing trend along with the increase of the left-right diameter B. The tibial tray prosthesis can be closer to the anatomical shape of the knee tibia of the human body, so that the coverage rate of the tibial tray prosthesis is increased, and the probability of prosthesis loosening and postoperative pain of a patient is reduced.

The invention belongs to the field of tools for medical operations in orthopedics department, in order to reduce steps of doctors in an artificial total knee arthroplasty operation and to improve operation efficiency on the basis of keeping stability; the artificial total knee proximal tibia integrated making tool provided by the invention comprises a sleeve and a main nail which is driven into anincision bone substance, wherein the main nail and the sleeve are in inserted clearance fit connection; a wing-shaped bone knife is arranged at the front end of the main nail; the wing-shaped bone knife comprises a knife drum, and a plurality of wing plates which are arranged at two sides of the outer wall of the knife drum and correspond to the wing-shaped structure of a tibial prothesis; the knife drum is of a hollow structure, and a hollow hole is a recovered hole that a columnar bone substance is incised; and linear grooves, which are used fr accommodating and expanding the wing plates, are correspondingly formed in the sleeve wall of the front section of the sleeve. With the application of the tool, conventional four-step artificial total knee arthroplasty can be shortened to be within 1h, so that operation efficiency is greatly improved.

The invention relates to a knee joint system, a tibial prosthesis, a tibial tray prosthesis series and a tibial tray prosthesis group. The tibial tray prosthesis group comprises at least two tibial tray prostheses of different models, wherein each tibial tray prosthesis is provided with a stand column connected with a tibia and a keel; each tibial tray prosthesis is further provided with a first reference surface and a second reference surface; the second reference surface is intersected with the first reference surface; and when the first reference surfaces of the tibial tray prostheses of different models are aligned and the second reference surfaces are aligned, the stand columns of the tibial tray prostheses of different models are overlapped and the keels are overlapped. According tothe tibial tray prosthesis group, the fixing stability of the tibial tray prostheses is improved and the loosening probability of the tibial tray prostheses is reduced. Meanwhile, stand column holes and keel 13 grooves do not need to be formed again so that the operation efficiency is also improved, the operation time is shortened and the infection probability of patients is reduced.

The invention provides a device for measuring interface pressure and pull-out friction between single condylar femoral prosthesis and tibial prosthesis during the process of single condyle replacementof the knee joint. The device for measuring the interface pressure and the pull-out friction between the single condylar femoral prosthesis and the tibial prosthesis during the process of the singlecondyle replacement of the knee joint is mainly composed of a pressure measurement head, a pull-out friction measurement connection part, and a hand-held handle; a pressure sensor is arranged on an upper surface of the pressure measurement head, and can be used for measuring the interface pressure between the single condylar femoral prosthesis and the tibial prosthesis; the pull-out friction measurement connection part is provided with a tension sensor which is used for indirectly measuring dynamic friction when the pressure measurement head is pulled out; a microprocessor module, a wireless transmission module and a power supply module are arranged inside the hand-held handle; and the microprocessor module converts received analog electrical signals into digital signals. During operationof the single condyle replacement of the knee joint, after installation of the single condylar femoral prosthesis and the tibial prosthesis, the device for measuring the interface pressure and the pull-out friction provided by the embodiment of the invention is used for measuring the pressure and the friction between the single condylar femoral prosthesis and the tibial prosthesis so as to facilitate understanding the pressure and the friction of the joint space during operation by a doctor, thereby improving accuracy of meniscus pad size and material selection so as to ensure that force on the implanted knee prosthesis is balanced.

The invention relates to a primary total ankle joint prosthesis. The prosthesis comprises a tibia prosthesis, a talus prosthesis and a sliding liner arranged between the tibia prosthesis and the talusprosthesis, an anti-shaking assembly connected with the tibia is formed at the upper end of the tibia prosthesis, the lower end of the tibia prosthesis is connected with the sliding liner, the upperend of the talus prosthesis is movably matched with the sliding liner, and the lower end of the talus prosthesis is fixed in the talus; the anti-shaking assembly comprises a square boss at the upper end of the tibial prosthesis, the cross section of the square boss is gradually decreased from top to bottom, and the longitudinal section of the square boss is gradually decreased from front to back.According to the invention, by connecting the square boss of the tibial prosthesis with the tibia, the contact area of a plane between the tibia prosthesis and the tibia is increased, and the stability of total ankle joint prosthesis implantation is increased; according to the shape of the square boss and the stress of movement of the ankle joint, the square boss and the groove are matched compactly, the whole ankle joint prosthesis is prevented from loosening and disengaging, the service life of the whole ankle joint prosthesis is prolonged, and more harms to a patient caused by a secondary operation are avoided.