71 results about "Articular surfaces" patented technology

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.

Bone and joint surface reconstruction methods are disclosed for the therapeutic amelioration of joint defects caused by various conditions, injuries, and diseases to help eliminate or reduce pain and return the joint to its proper bio-mechanical function without the need to replace fully or partially the anatomical joint. The joint may specifically include mammalian joints such as the femorotibial joint, for example. The methods disclosed herein leverage the significant role the subchondral bone plays in the health status of the afflicted joint.

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.

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.

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.

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.

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 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.

The utility model discloses an intramedullary needle for treating fracture and convenient to hold, which is provided with a treatment section and a holding section for operating and holding, and a positioning structure for holding and positioning is further arranged on the holding section. The intramedullary needle conforms to tubular bone biological fixation, the treatment section can be effectively prevented from rotating in the surgical treatment operation process through the holding section, the penetration depth and path of the treatment section can be further accurately controlled, the treatment accuracy is improved, and the treatment duration is shortened. When the intramedullary needle is used in the treatment process of metacarpal bone fracture, further damage to fracture local hematoma and periosteum can be avoided through closed reduction, blood supply of sclerotin is protected, and fracture healing is facilitated. The intramedullary needle is small in trauma, small in wound scar and beneficial to attractiveness; intramedullary fixation retains the minimally invasive characteristic of kirschner wire fixation, and the fixing effect is more stable and lasting than that of a kirschner wire, and the articular surface is not damaged.

The application discloses a tibial osteotomy positioning assembly, a gap measuring assembly, an osteotomy device and an osteotomy system. The tibial osteotomy positioning assembly comprises a mounting mechanism and at least one measuring piece. The mounting mechanism is used for connecting with a tibial osteotomy block. The at least one measuring piece is used for connecting with the mounting mechanism. The mounting mechanism can place the at least one measuring piece in a first measuring position and a second measuring position. The at least one measuring piece is located at different positions of the mounting mechanism when being placed in the first measuring position and the second measuring position. The measuring piece in the first measuring position is used for being inserted between an inner condyle of a femur and an articular surface of a tibia, so as to measure the distance between the inner condyle and the articular surface, and to position the relative positions of the tibial osteotomy block and the articular surface. The measuring piece in the second measuring position is used for being inserted between an outer condyle of the femur and the articular surface of the tibia, so as to measure the distance between the outer condyle and the articular surface, and to position the relative positions of the tibial osteotomy block and the articular surface.

The invention discloses a defective skeleton image restoration method and device, and relates to the technical field of medical image processing, a double-flow generation network is used as a core architecture, a graph flow network dynamically models a spatial topological relation of defective skeleton mark points through graph convolution, and an articular surface mechanical conduction chain and a vascular nerve distribution rule are captured; the image flow network adopts a multi-scale detail enhancement module, and retains bone trabecula microstructure and defect boundary geometric features while generating a complete bone image. In order to further improve biomechanical rationality, a nonlinear implicit space mapping mechanism is designed, defect mark point distribution is mapped to an implicit space, probability distribution of complete anatomical mark points is jointly predicted, and it is ensured that a repair path conforms to the bone growth and mechanical transfer rule. For the real-time requirement in the operation, a cascade feature distillation technology is introduced, redundant features are compressed step by step in the image generation process, and the calculation efficiency is greatly improved.

This invention proposes a total knee arthroplasty, comprising a tibial liner and a femoral prosthesis. The medial articular surface is constructed as a curved surface with a sagittal radius of RTM, and the distal surface of the medial condyle is constructed as a curved surface with a sagittal radius of RFM that overlaps with the medial articular surface, wherein 1:1.1≥RFM:RTM≥1:1.8. The medial articular surface of the proposed total knee arthroplasty is an arc with a single radius in the medial sagittal plane, and there is a relatively high fit between the medial articular surface and the medial condyle. This ensures stable rotation of the total knee arthroplasty around the medial side and provides a certain range of anterior-posterior displacement for the medial condyle, improving the high flexion performance of the total knee arthroplasty. The high fit between the medial articular surface and the medial condyle also provides a large contact area, effectively reducing wear on the total knee arthroplasty and extending its service life.

This disclosure relates to planning systems and methods associated with erosion along an articular surface of a joint. The planning systems and methods disclosed herein may be utilized for planning orthopaedic procedures to restore functionality to a joint, may include determining an amount of erosion along or otherwise adjacent to an articular surface of a bone. One or more spherical objects may be utilized to determine the erosion.

Bone and joint surface reconstruction methods are disclosed for the therapeutic amelioration of joint defects caused 2024 / 064830 by various conditions, injuries, and diseases to help eliminate or reduce pain and return the joint to its proper bio-mechanical function without the need to replace fully or partially the anatomical joint. The joint may specifically include mammalian joints such as the metatarsal phalangeal joint or other joint of the foot or ankle, for example. The methods disclosed herein leverage the significant role the subchondral bone plays in the health status of the afflicted joint.WO

An ankle arthroplasty implant system and method for installing into a resected ankle is provided including a multi-component tibia stem, a tray implant that includes side pockets extending into the tray implant. The tray implant further includes a proximal surface configured to engage the multi-component stem, and a distal side, including a recess. A talar dome implant is also provided that includes a convex proximal articular surface, an anterior side, a posterior. The ankle arthroplasty implant system further includes a polymer insert configured to be inserted in the tray implant recess.

Implants, systems, instruments, methods, and kits for metatarsophalangeal joint arthroplasty may include metatarsal arthroplasty implants, repositioning guides, broach tools, inserter tools, and sterilizable packaging configured to facilitate metatarsal arthroplasty surgical procedures. The metatarsal arthroplasty implants may generally include an articular member having a convex articular surface, a concave bone-facing surface opposite the convex articular surface, and at least one side surface intermediate the convex articular surface and the concave bone-facing surface, as well as a central shaft sized for insertion into a metatarsal bone having a central shaft longitudinal axis, a central shaft proximal end coupled to the concave bone-facing surface of the articular member, and a central shaft distal end extending away from the concave bone-facing surface of the articular member along the central shaft longitudinal axis.

Implants, devices, instruments, systems and methods for replacing an articulation surface in a joint, for example, unicompartmental knee implants. A femoral resection assembly including a femoral cut guide and a spacer coupled to an inferior surface of the femoral cut guide. A fin punch for receipt within the femoral cut guide. A tibial resection guide and keel cutter for preparing a patient's tibia for insertion of a tibial implant. A tibial insertion system including a handle, an impaction inserter coupled to an inferior end of the handle, a tibial implant coupled to an inferior end of the impaction inserter, and an implant packaging assembly that receives the impaction inserter and tibial implant. Methods for implanting the unicompartmental knee implants are also disclosed.

This invention discloses a multi-objective optimization-based method for preoperative tibial prosthesis localization in ankle replacement surgery, primarily addressing the problems of poor accuracy and low reliability in existing ankle prosthesis localization methods. The method includes: 1) acquiring and processing medical CT images and prosthesis model data of the affected lower limb, completing prosthesis standard position calibration and establishing a local coordinate system; 2) segmenting bone tissue, extracting three-dimensional models of the tibia, fibula, and talus, and including HU bone mineral density values; 3) standardizing the skeletal model, labeling anatomical landmarks, and constructing an orthogonal standard coordinate system; 4) pre-calculating relevant data of the distal tibial articular surface; 5) generating initial candidate solutions through grid search and constraint filtering; 6) obtaining the Pareto front by combining the NSGA-II-CDP algorithm and constraint dominance principles; 7) recommending the optimal solution and generating a visual model through multi-stage compromise solution filtering and multi-criteria decision-making. This invention can unify anatomical orientation, improve computational efficiency, and achieve accurate and efficient localization.

The invention relates to a temporomandibular joint prosthesis (90, 902) comprising a first element (30, 302) that can be fastened to a first side of the lower jaw (40) and a second element (80, 802) that can be fastened to the first side of the cranium (50), wherein a joint head (42, 422) is formed at one end of the first element (30, 302), wherein a joint surface (82) is formed on the second element (80, 802), said joint surface forming an abutment of the joint head (42, 302), wherein the joint head (42, 422) and the joint surface (82, 822) predefine a rotational axis (A1, A2), wherein the first element (30, 302) and the second element (80, 802) are shaped such that, in the implanted state, the rotational axis (A1, A2) is pre-oriented at an angle to a frontal plane (F) of the patient. The invention also relates to a kit (K) consisting of two such temporomandibular joint prostheses (90, 902).

Disclosed herein are patellar implants and methods to prepare bone for receiving the same. The patellar implant may include an articulating surface with an elliptically shaped median ridge. The anterior surface of the patellar implant may have a non-planar surface to engage with a resected natural patella. The non-planar surface may allow for varying thickness of the patellar implant. The patellar implant may include dual attachment features to secure patellar implant to a resected patella by onlay and inlay techniques. A method for attaching a patellar implant to a patella may include onlay and inlay techniques and may further include bone preparation at the implant-bone interface.

The application discloses a cutting guide plate for a proximal tibia and a preparation method thereof, and belongs to the technical field of orthopedic cutting guide plates. The cutting guide plate comprises a positioning plate, the bottom surface of the positioning plate is attached to a tibial articular surface and lateral bone, a cutting groove is formed in the side surface of the positioning plate, the cutting groove is inclined backward by 3-5 degrees, an avoiding hole is formed in the top surface of the positioning plate, and at least two fixing holes are arranged on the positioning plate; and a positioning line is arranged on the upper end surface of the positioning plate, and the positioning line is used for pointing to the inner 1 / 3 of a tibial tuberosity. The cutting guide plate is used for tibial cutting surgery, effectively improves the cutting and prosthesis installation accuracy, shortens the operation time, reduces the operation complications, and helps the patient to quickly recover.

Implants, systems, instruments, methods, and kits for metatarsophalangeal joint arthroplasty may include metatarsal arthroplasty implants, repositioning guides, broach tools, inserter tools, and sterilizable packaging configured to facilitate metatarsal arthroplasty surgical procedures. The metatarsal arthroplasty implants may generally include an articular member having a convex articular surface, a concave bone-facing surface opposite the convex articular surface, and at least one side surface intermediate the convex articular surface and the concave bone-facing surface, as well as a central shaft sized for insertion into a metatarsal bone having a central shaft longitudinal axis, a central shaft proximal end coupled to the concave bone-facing surface of the articular member, and a central shaft distal end extending away from the concave bone-facing surface of the articular member along the central shaft longitudinal axis.

The invention discloses a thighbone tackle forming method based on 3D printing, and relates to the technical field of three-dimensional reconstruction. Comprising the steps of data collection, data preprocessing, three-dimensional model construction, parameter measurement, individualized reconstruction, osteotomy guide plate design and intraoperative forming, knee joint skeleton anatomy details are accurately obtained through spiral CT data collection, multi-step image processing and three-dimensional modeling, and the individualized reconstruction of the tackle groove based on patient individual anatomy is achieved. The curvature radius, the width, the depth and the articular surface angle of the reconstructed tackle groove are matched with the height of the patella, the operation accuracy is improved, and the problem that the patella is unstable due to maldevelopment of the tackle groove is solved; the design of the osteotomy guide plate realizes accurate conversion from virtual osteotomy to an actual operation, the binding surface of the osteotomy guide plate is tightly attached to the outer surface of the femur, the osteotomy channel is accurately matched with an osteotomy tool, the operation time is shortened, the design of the fixing holes ensures that the guide plate is stable, the osteotomy deviation risk is reduced, and the operation safety is improved.

This invention discloses an artificial intelligence-based automatic four-zone segmentation and measurement system for calcaneal fractures, relating to the field of three-dimensional image analysis technology. The method acquires the DICOM sequence of foot and ankle CT scans, converts it into NIfTI three-dimensional volume data, and performs voxel resampling, bone window normalization, and orientation standardization. A first segmentation network extracts a complete three-dimensional mask of the calcaneus, establishes a three-dimensional anatomical coordinate system, and clips the region of interest (ROI) of the calcaneus. A second segmentation network generates four-zone probability maps: the anterior region, the posterior region, the superior articular surface-related region, and the medial support region. The spatial assignment of structural blocks is determined by constraints from the complete calcaneal three-dimensional mask, connected component analysis, and the centroid and anchor point projection of the structural blocks. Finally, based on the complete calcaneal contour and the four-zone label map, geometric angles, surface height differences, the number of effective connected components, and the three-dimensional contact ratio are extracted and encapsulated into structured parameter files and quality control markers for easy three-dimensional display and image retrieval.

The invention relates to the technical field of orthopedic implantation, in particular to an anatomical adaptive 3D printing porous tantalum atlantoaxial lateral mass fusion cage which comprises a fusion cage body, and the structure of the fusion cage body is limited to be capable of being placed in a joint gap between an atlantoaxial lateral mass and an axis lateral mass; an upper contact surface and a lower contact surface are formed on two opposite sides of the fusion cage main body, the upper contact surface is used for being in contact with a lower joint surface of an atlas lateral mass, and the lower contact surface is used for being in contact with an upper joint surface of an axis lateral mass; according to the fusion cage, the fitness of the fusion cage body and the joint surfaces of the atlas lateral mass and the axis lateral mass is improved, load dispersion is facilitated, and the interface micro-motion risk is reduced; the porous net rack provides a communication space for bone tissue ingrowth, improves bone-implant combination conditions, and is beneficial to fusion stabilization; the clamping hole is matched with the limiting structure to improve the grasping, pushing and positioning stability of the instrument, and relative rotation or axial movement in the operation is reduced; the integrity and reliability of the structure are improved through the circumferential continuous closed side wall and overall additive manufacturing forming, and the loosening risk is reduced to a certain degree.

A drill guide for separation a bearing from a tray of an implant assembly can include a body, a collar, a first projection, a second projection, and a third projection. The body can be engageable with the bearing. The collar can be connected to the body and can define a guide bore configured to guide a drill bit into the bearing when the drill guide is engaged with the bearing. The first projection and the second projection can be engageable with a radially outer surface of the bearing. The third projection can be configured to engage an articulation surface of the bearing to, together with the first projection and the second projection, position the guide bore along a trajectory to guide the drill bit to form a hole in the bearing between the articulation surface and the tray when the bearing is connected to the tray.

A trapezium implant for replacing the distal articular surface of the trapezium at the carpo-metacarpal joint of the thumb by press fit insertion into a prepared channel in a target trapezium, and an insertion guide system and method for inserting the implant. The implant has a saddle-shaped articular surface configured to articulate with a natural existing base of a first metacarpal, articular surface features mimicking natural trapezium bone anatomy and preserving two centers of rotation of the carpo-metacarpal joint, and a single keel extending from a mounting surface and configured to embed the implant into the thickest area of the target trapezium. The single keel minimizes damage to the trapezium and improves surgical implantation. The target trapezium is prepared using an implant insertion guide system including at least one cutting guide and a slot guide, each of which is releasably securable and configured to receive a cutting device.