136 results about "Articular surface" patented technology

An orthopaedic system includes a tibial insert and a femoral component configured to articulate on the tibial insert. The tibial insert includes an articular surface, and the femoral component includes a femoral articular surface having decreasing radii of curvature posteriorly. The articular surface of the tibial insert includes an increased anterior lip to improve stability of the femoral component.

An orthopaedic joint prosthesis assembly includes a head part of an orthopaedic joint prosthesis component and an alignment guide. The head part has a spherical bearing surface for articulation with a corresponding joint surface, and an assembly surface having a first bore formed in it for receiving a spigot on another part of the orthopaedic joint prosthesis. The bore has a first axis that extends perpendicular to the assembly surface. The alignment guide has an axial portion defining a second axis and an arm extending from the axial portion. The arm includes a distal portion which is configured to engage the assembly surface, with the axial portion being arranged to engage the bearing surface of the head part when the head part is mounted within the guide such that an impaction force applied along the second axis is directed along the first axis.

An apparatus, system, and method may be used to replace a natural or artificial articular surface of a joint, and to repair a bone that is associated with the joint. In some embodiments, the apparatus, system, and method may include a joint replacement prosthesis with a prosthetic articular surface, a support structure securable to the bone, and a first attachment interface. The system may also include a bone plate with a bone engagement surface securable to the bone on either side of a fracture formed in the bone, or a damaged area of the bone. The bone plate may include a second attachment interface that is attachable to the first attachment interface of the joint replacement prosthesis in order to couple the bone plate to the joint replacement prosthesis.

An ankle joint replacement prosthesis comprises a tibia prosthesis assembly and a talus prosthesis, the tibia prosthesis assembly comprises a tibia prosthesis body and a cushion block, the tibia prosthesis body and the cushion block are in an arc shape with the middle bent upwards on the sagittal plane, the cushion block is arranged at the bottom of the tibia prosthesis body in a sleeving mode, and the surface of the upper portion of the tibia prosthesis body is a tibia joint face. The surface of the lower portion of the cushion block is a first articular surface, the surface of the upper portion of the talus prosthesis is a second articular surface, the second articular surface is in an arc shape with the middle bent upwards on a sagittal plane, the surface of the lower portion of the talus prosthesis is a talus joint surface, and the first articular surface is matched with the second articular surface. When the prosthesis is implanted, only the articular cartilage and the subchondral bone need to be treated at the far end of the tibia, so that the bone at the far end of the tibia is reserved to the maximum extent, the anatomical integrity of the bone is guaranteed, the stability of the prosthesis is enhanced, the service life is prolonged, and the clinical operation effect is improved.

According to one example, a tibial prosthesis that can include a tibial bearing component, tibial baseplate, an insert and a fastener. The tibial bearing component can have medial and lateral proximal articular surfaces and an opposing distal surface. The tibial bearing component can define at least one recess therein with the recess having an opening at a periphery of the tibial bearing component. The tibial baseplate can be coupled to the tibial bearing component on the proximal surface thereof and having a distal surface configured to be disposed on a resected proximal surface of a tibia. The insert can be configured to be disposed within the recess and can engage the tibial baseplate and the tibial bearing component. The fastener can be insertable into the tibial bearing component and can be configured to retain the insert to the tibial baseplate.

Disclosed are prosthesis systems and methods that provide ways by which the articulating surfaces of the implant can be exchanged such that the anatomic surfaces can be converted to reverse surfaces, while not exchanging the fixation components. Also disclosed herein are methods by which the surgeon can implant an inset anatomic articulating glenoid implant whereby at a later date, can remove the anatomic articulating surface and replace it with a reverse articulating surface such that the primary means of fixation remains well fixed in the glenoid fossa at the moment of articular exchange.

A surgical method surgical method includes collecting a set of patient data, identifying at least one significant point from the set of patient data, creating a surgical guide based on the at least one significant point and the patient data, and coupling the surgical guide with a calcaneum of a patient. The surgical method also includes performing at least one cut into the calcaneum using the surgical guide, wherein the at least one cut forms a recess in the calcaneum and defines a first calcaneal portion positioned substantially anteriorly from the recess and a second calcaneal portion positioned substantially posteriorly from the recess, shifting at least one of the first calcaneal portion and the second portion in a medial direction by placing an implant at least partially within the recess, and coupling the implant with the first calcaneal portion and the second calcaneal portion.

The invention provides a method for key point detection and angle measurement of an anterior X-ray image of an ankle joint, and belongs to the technical field of image processing. According to the method, an anterior X-ray image of an ankle joint is collected, a standard data set is constructed, and the data set is utilized to train a key point detection network. The method comprises the following steps: firstly, carrying out standardization processing on an anterior X-ray image of an ankle joint, and training a key point detection model by utilizing an annotation data set; then, the trained model is applied to a new X-ray image, and detection results of 12 key points are obtained through prediction of the model. And finally, based on a key point detection result, combining a mathematical algorithm and an image processing technology to calculate the following angles: a tibia lateral malleolus angle, a tibia medial malleolus angle, a tibia articular surface angle, a tibia ankle acupoint angle, a tibia ankle angle, a fibular ankle angle, a talus inclination angle, a medial and lateral malleolus angle and a tibia talus angle. The method can provide an accurate diagnosis basis for clinicians, helps orthopedists to quickly evaluate the health condition of the ankle joint, remarkably improves the accuracy and efficiency of angle measurement, and reduces manual operation time and errors. The method has wide application prospects in the fields of ankle joint injury assessment, treatment effect monitoring and the like.

The present disclosure relates to a prosthesis (400) configured for implantation in a carpometacarpal joint in the wrist, the prosthesis comprising a first and a second implant part member (405a,b) configured to be screwed into a radius and metacarpal bone respectively. Each implant part member (405a,b) comprising an articulation member (420a,b) configured to be received in the bone fixation member (410a,b) in a releasable manner. The articulation members (420a,b) comprise orientation pins (423) configured to be inserted into bore sections of the bone fixation members 410a,b. When seated in the bore sections, the first portions of the articulation members (420a,b) with the orientation pins (423) are substantially centered along the central axes of the bone fixation members (410a,b), thereby forming common central axes extending through the bone fixation members (410a,b) and the articulation members (420a,b). The radius articulation member (420a) comprises a replacement articular surface configured for articulation with a replacement articular surface located on the metacarpal articulation member (420b). The radius replacement articular surface has (420a) a configuration that is asymmetric about the common central axis of the radius bone fixation (410a) and articulation members (420a). The bore sections have cross-section (419) extending perpendicularly to the central axis defining a first polygonal outline (429). The orientation pins (423) have cross-sections defining a second polygonal contour line, such that when the orientation pins (423) of the articulation members (420a,b) are seated in the bores of the bone fixation members (410a,b), rotation of the articulation members (420a,b) in relation to the bone fixation members (410a,b) is prevented.

The utility model discloses an air pressure hip joint which comprises an acetabular cup, an acetabular liner is movably arranged on one side of the acetabular cup, a femoral head prosthesis is movably arranged on one side of the acetabular liner, the femoral head prosthesis is integrally spherical, one side of the femoral head prosthesis is a plane, a center hole is formed in the plane side of the femoral head prosthesis, and a femoral stem prosthesis is movably arranged in the center hole. A central hole is formed in the femoral head prosthesis, an air pressure cavity is formed in the inner wall of the femoral head prosthesis in the axial direction, the air pressure cavity is communicated with the central hole of the femoral head prosthesis, a micro air pump is fixedly arranged on the inner wall of the femoral head prosthesis, and a pressure sensor is fixedly arranged on the inner wall of the air pressure cavity. The air pressure in the hip joint is accurately adjusted, the air pressure is properly reduced, the pressure between articular surfaces is reduced, and wound healing is facilitated; in the later period of rehabilitation, along with recovery of the joint function of the patient, the air pressure can be gradually increased, the stability and supporting force of the joint are improved, and the patient can better adapt to daily activities.

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.

The present disclosure are directed toward an articular assembly configured to be coupled with a bone anchor. The articular assembly may include an articular body having a first end and a second end with an articular surface disposed on or adjacent to the first end. The articular body may include a bone anchor interface disposed between the first end and the second end of the articular body. The bone anchor interface may include a channel formed in a circumferential surface of the articular body, a locking member disposed in the channel, and / or a deflectable portion disposed between the locking member and the second end of the articular body.

An orthopaedic system includes a tibial insert and a femoral component configured to articulate on the tibial insert. The tibial insert includes a pair of articular surfaces spaced apart by a post. The femoral component includes a pair of femoral condyles spaced apart by a notch in which a cam is located. During flexion, the cam of the femoral component is configured to contact the post of the tibial insert. The dwell point of the medial articular surface of the tibial insert is located, relative to the contact point between the post and tibial insert, to improve stability of the femoral component.

The present invention relates to a distal femoral osteotomy positioning device, comprising a positioning block, a spacer, and an osteotomy guide. The positioning block has a first positioning surface, the first positioning surface being used to contact the tibial osteotomy surface so that the positioning block is positioned on the tibia; the spacer has a second positioning surface opposite to the first positioning surface, the second positioning surface being used to contact the distal articular surface of the femur, and an angle is formed between the first positioning surface and the second positioning surface; the osteotomy guide has an osteotomy groove. The distal femoral osteotomy positioning device of the present invention can maintain a posterior tilt angle of 3° to 7° during tibial osteotomy so that the tibial plateau conforms to the physiological morphology of the knee joint, while reducing the situation in which the distal femoral osteotomy thickness varies due to inconsistent insertion depth of the positioning block into the knee joint, thereby maintaining the accuracy of osteotomy positioning.

The utility model belongs to the field of medical instruments, and provides a tibia osteotomy guide plate which comprises a tibia osteotomy guide part, a tibia first attaching part and a tibia second attaching part, and the tibia osteotomy guide part is provided with a tibia osteotomy groove; the tibia first attaching part is connected with the tibia osteotomy guide part, and the tibia first attaching part is provided with a tibia first attaching face used for being attached to a tibia articular face; the second tibia attaching part is connected with the tibia osteotomy guiding part, the second tibia attaching part is provided with a second tibia attaching face used for being attached to the side face of the near end of the tibia, and the second tibia attaching part is provided with a tibia positioning hole; wherein a tibia side anti-skid structure is formed on the tibia first binding surface and / or the tibia second binding surface. The tibia osteotomy guide plate can be stably and accurately attached to the proximal end of the tibia.

According to one example, a bearing component for a knee arthroplasty is disclosed. The bearing component can optionally comprise any one or combination of: a medial compartment having an medial articular surface with a medial articular track and having a first thickness as measured at the medial articular track between the medial articular surface a medial distal surface; and a lateral compartment having a lateral articular surface with a lateral articular track and having a second thickness as measured at the lateral articular track between the lateral articular surface a lateral distal surface; wherein the medial articular surface at the medial articular track and the lateral articular surface at the lateral articular track each have an inclination so as to form an acute angle with respect to a resected proximal surface of a tibia.

A humeral head assembly is provided that includes an articular body and a coupler. The articular body includes a coupling portion disposed on a side of the articular body opposite an articular surface. The coupling portion includes a continuous zone of eccentricity adjustment. The coupler portion optionally includes one or more than one discrete position site. The coupler includes a first portion and a second portion opposite the first portion. The first portion is configured to mate with the coupling portion and the second portion is configured to mate with another member of a joint prosthesis. A coupling portion with the continuous range of eccentricity adjustment can be provided on a bone anchor and the eccentricity of another component can be selected by motion of a coupler, such as a tray for reverse humeral assemblies, along the coupling portion of the anchor.

A prosthetic hip implant comprises a femoral component, an acetabular component, a liner, and ball bearings. The femoral component includes a stem for attachment to the patient's femur and a femoral head structure for articulation with a bearing surface. The acetabular component features a socket formation designed to receive the femoral head structure. The liner covers the exterior articulation surface of the socket formation, with one side in contact with the socket's exterior surface and the other side forming the bearing surface. Ball bearings are positioned between the femoral component and the bearing surface and are rotatably mounted within spaced parallel concentric grooves define in structure to transmit forces between the structure and the bearing surface.

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.

An oscillating decorticating burr assembly for decortication of the articular surfaces of joints of the human body is disclosed. The oscillating decorticating burr assembly comprises a burr, a burr-support post, and a handle. Power is imparted to the assembly by way of a user input on the handle causing oscillation of the burr.

The utility model relates to a three-point memory alloy near-articular-surface fracture fixator, which belongs to the technical field of medical instruments and comprises an arc-shaped nail back, a first cylindrical screw and a nail corner are respectively arranged at two ends of the arc-shaped nail back, and a second cylindrical screw is arranged at the other end of the arc-shaped nail back. The first cylindrical screw and the second cylindrical screw are both bent downwards from the ends of the arc-shaped screw backs, the diameter of the first cylindrical screw is larger than that of the second cylindrical screw, diagonal planes are arranged at the bottom of the first cylindrical screw and the bottom of the second cylindrical screw, and the diagonal planes are the tips of the lower portions of the first cylindrical screw and the second cylindrical screw and only need to be inclined downwards. During use, two-point fixation is changed into three-point fixation, and the triangular cylindrical screws further increase stability after fracture fixation and avoid movement of the fracture after fixation.

This invention relates to the field of medical devices, and in particular to an additive manufacturing porous anti-dislocation shoulder joint prosthesis system and its manufacturing method. The additively manufactured porous anti-dislocation shoulder joint prosthesis system consists of a humeral stem (1), a porous humeral body (2), a porous hemisphere lower end (3), a joint head (4), a double-ended pin (5), a joint head limiting plate (6), a porous hemisphere upper end (7), and a fixing screw (8). The head of the porous humeral body (2) has an outer conical surface that connects to the inner conical hole at the lower end of the porous hemisphere (3). The bottom surface of the lower end of the porous hemisphere (3) has an inner conical surface structure that matches the upper taper of the porous humeral body (2). The upper part of the lower end of the hemisphere (3) matches the joint head (4) as a joint surface. The top surface of the lower end of the porous hemisphere (3) matches the upper end surface (7) of the porous hemisphere with a keyway locking fit. The lower part of the joint head (4) is combined with the upper joint surface of the lower end of the porous hemisphere (3). The joint head limiting plate (6) is used in conjunction with the upper end of the porous hemisphere (7).

A hybrid inlay / onlay (HIO) implant system includes an implant and an anchor. The implant comprises an inlay component and an onlay component. The inlay component is configured to be at least partially received in an excision site and includes a bone facing surface configured to abut against the bone within the excision site. The onlay component comprises an uppermost surface and a stepped surface. The uppermost surface includes an articulating surface configured to articulate against an articulating surface associated with a second bone of the joint. The stepped surface is configured to abut against at least some of a remaining portion of the patient's native articular surface proximate the excision site and / or a peripheral step excision site formed proximate the excision site. The anchor is configured to extend away from the bone facing surface of the inlay segment and to secure the HIO implant system to the first bone.

A tibial plateau posterior lateral fixing device comprises a fixing steel plate and screws. The fixing steel plate comprises a C-shaped steel plate body, a binding face which is formed on the inner side of the C-shaped steel plate body and used for being attached to sclerotin under a tibial plateau articular surface, one or more fixing screw holes formed in the front end of the C-shaped steel plate body, and positioning holes which are formed in the rear end of the C-shaped steel plate body and are opposite to the one or more fixing screw holes. The screws are matched with the one or more fixing screw holes, and the tail ends of the screws can be clamped in the positioning holes; according to the fixing device limited by the application, the injury risk of nerve, blood vessel and tendon caused by a complicated anatomical structure of a conventional rear side approach is avoided; the C-shaped steel plate body can penetrate through a gap between an outer side collateral ligament and a tibial condyle above a fibula head and wrap the rear outer side of a tibial plateau, so that extrusion supporting of a blind area bone block on the rear outer side is achieved; and the two screws are clamped into the rear positioning holes to form a frame structure, so that the fixing device has good mechanical stability.

To provide a joint surface processing determination system capable of objectively assessing quality of a joint surface treatment after estimating an aggregate distribution on the concrete surface to thereby solve the problems of a conventional technique, and a joint surface processing determination method.SOLUTION: A disclosed joint surface processing determination system is a system to determine quality of a joint surface treatment on the basis of, an original image of the concrete surface. The system includes smoothing processing means and aggregate extraction means. The smoothing processing means is means that generates a first smoothed image and a second smoothed image by smoothing the original image. The aggregate extraction means is means that finds a pixel value difference between the first smoothed image and the second smoothed image and extracts a part where the pixel value difference exceeds an aggregate threshold as an aggregate part.SELECTED DRAWING: Figure 3

This invention belongs to the field of foot and ankle joint replacement implant technology, and discloses an ankle joint talus prosthesis with an antibacterial porous interface and its preparation method. It includes a prosthesis substrate with an overall anatomically contoured structure, including a superior articular surface, a inferior articular surface, and an anterior articular surface; the area of ​​the prosthesis substrate in contact with residual bone tissue is designed as a three-dimensional porous structure; an antibacterial bioactive composite coating is grown in situ on the surface of the prosthesis substrate; it includes calcium and phosphorus bioactive components and antibacterial ions. This invention, by constructing an antibacterial bioactive composite coating at a porous bone integration interface, utilizes biocompatibility and osteoconductivity to induce bone tissue growth. Furthermore, the antibacterial ions can be slowly and continuously released in the interstitial spaces, achieving a dual function of promoting bone integration and preventing infection. Moreover, the antibacterial bioactive composite coating is formed through in-situ growth, resulting in a strong bond with the substrate and preventing detachment.

This application relates to the field of medical device technology, specifically to an extramedullary positioning distal femoral osteotomy device for knee replacement, comprising an osteotomy plate, an axial indicator, a rotating component, and a reference plate. The osteotomy plate has a reference end face and an abutment end face, with a cutting suture and pin holes provided on the reference end face. The axial indicator is rotatably mounted on the reference end face; the rotating component is rotatably mounted on the reference end face; the reference plate is slidably mounted on the rotating component, and the reference plate can slide on the rotating component in a direction away from or close to the rotation axis of the rotating component, with the reference plate perpendicular to the reference end face. In this application, the axial indicator determines the direction of the patient's femoral axis, ensuring that the movement of the osteotomy plate is consistent with the direction of the femoral axis, thereby improving the accuracy of the cutting position during surgery. The rotating component and the reference plate allow the surgeon to adjust according to the preoperatively determined angle of the prosthesis articular surface, enabling precise matching of the cutting suture angle with the prosthesis articular surface, further improving the precision of the surgery.

The utility model discloses a humerus handle beneficial to large and small tubercle reconstruction, which comprises a humerus prosthesis handle, a cover plate and a fixing screw, a screw hole is arranged on the humerus prosthesis handle, a joint surface is fixed on the humerus prosthesis handle, the joint surface is matched with a cambered surface joint head, and the cover plate is fixed on the cover plate. The humerus prosthesis handle is mutually fixed with a human body bone block through the cover plate and the fixing screw. According to the humerus handle beneficial to large and small tubercle reconstruction, the overall operation is simple, a doctor does not need to conceal a suture binding mode and a mechanical structure when a patient moves later, compared with a traditional suture binding mode, the risk that bone fragments are separated from the binding position is high, the design has no risk, fixation is firm, the humerus prosthesis handle is made of a titanium alloy material, and the use is convenient. The screw and the cover plate are also made of titanium alloy materials, biocompatibility is guaranteed, meanwhile, strength is achieved, the cover plate and the screw are in spherical connection, the device can better adapt to the shape of a bone block, and the adaptability of the device is improved.

The present invention relates to a tibial liner. The tibial liner includes a medial articular surface and a lateral articular surface. The cross-sectional line formed by the intersection of the medial articular surface and a first sagittal plane includes a first arc, a first straight line segment, and a second arc connected in sequence. The radius of curvature of the first arc is greater than or equal to the radius of curvature of the second arc. The cross-sectional line formed by the intersection of the lateral articular surface and the second sagittal plane includes a fourth arc, a second straight line segment, and a fifth arc connected in sequence. The radius of curvature of the fourth arc is greater than or equal to the radius of curvature of the fifth arc. The tibial liner has good stability.

The tibia osteotomy positioning assembly comprises a base, a mounting seat and a pointer structure, at least one inserting piece is arranged on each of the two sides of the base in the first direction, each inserting piece is used for being inserted into an osteotomy groove of an osteotomy block, and the inserting pieces on the two sides of the base in the first direction have a height difference in the second direction; the mounting seat is arranged on one side of the base in the second direction; the pointer structure comprises a connecting rod and at least one measuring pointer, the measuring pointers are connected with the connecting rod, each measuring pointer comprises an abutting end used for abutting against the articular surface of the tibia, and the connecting rod is rotationally connected with the mounting base; the connecting rod can rotate around a first rotating axis relative to the mounting seat so as to drive the abutting end to rotate, and the connecting rod extends along the first rotating axis; and / or the mounting seat can rotate around a second rotating axis relative to the base, and the second rotating axis is basically parallel to the second direction. According to the tibia osteotomy positioning assembly provided by the embodiment of the invention, the measuring pointer can accurately abut against the lowest point of the tibia articular surface.