97 results about "Condyle" patented technology

The invention provides a tibial prosthesis preoperative planning method and device, electronic equipment and a storage medium, a tibial condyle region point set is obtained by combining an operative side condyle region point set and a normal condyle region point set, a tibial coordinate system is constructed according to the tibial condyle region point set, a final reference point of a prosthesis posture is calculated in the tibial coordinate system, and the final reference point of the prosthesis posture is calculated according to the final reference point. The method comprises the following steps: acquiring a final reference point of a prosthesis posture, calculating the size of an operation-side condyle prosthesis region according to the final reference point of the prosthesis posture, and matching an optimal prosthesis body size and an optimal mounting posture according to the size of the operation-side condyle prosthesis region, so that feature information of a normal condyle is effectively utilized to assist in modeling, a more reasonable tibia coordinate system is constructed, and the accuracy of the model is improved. And the accuracy of prosthesis type matching and prosthesis posture planning is improved.

The invention discloses a three-section thighbone retrograde intramedullary nail, relates to the field of medical instruments, and provides a detachable and assembled three-section thighbone retrograde intramedullary nail aiming at the problems that an existing thighbone medial condyle retrograde intramedullary nail is poor in adaptability and insufficient in fixing strength. A main nail body of the intramedullary nail is composed of a head section, a middle section and a tail section, original spiral nested structures are adopted at the joints of the sections, and the three sections are tightly connected to form the complete and high-strength intramedullary nail by matching with the hollow interior design and penetrating a titanium cable into a medullary cavity for tightening and automatically rotating and matching the head section and the middle section of the main nail body. And medullary cavity structures and fracture types of different patients can be accurately matched. Compared with a traditional intramedullary nail, the intramedullary nail has the advantages that mounting convenience and structural stability are remarkably improved, intraoperative adjustment time can be shortened, the risk of injury to a medullary cavity of a patient is reduced, and an innovative solution is provided for personalized treatment of distal femur fractures.

The invention relates to dental medicine. A method for restoring an individual's vertical dimension of occlusion taking into account their facial proportions consists in obtaining, from a frontal view of the patient's face, an image of the patient's temporomandibular region and of the outline of the face, and determining from the image of the temporomandibular region the presence of condylar displacement in the joint space and the direction of the displacement in relation to the centric position. The same image is used to determine the patient's vertical dimension of occlusion and to ascertain the angular deviation from the Ricketts angle of normal vertical dimension of occlusion. The lower jaw is then relocated by the amount of the ascertained deviation and in the direction of said deviation to the SNA-Pm line of an SNA-Xi-Pm intermaxillary angle. The current Gl-Sn-Pog facial convexity angle is then determined for subsequent adjustment of the relocation of the lower jaw, and a digital graphical model is obtained of the lower jaw with the condyles in the normalized position in the joint space and in relation to the normalized intermaxillary angle and facial convexity angle.

The invention provides a condyle positioning device and a lower jaw fixator with the condyle positioning device.The condyle positioning device comprises a condyle positioning component, a tooth retention guide plate and a dividing structure formed between the condyle positioning component and the tooth retention guide plate. Wherein the tooth retention guide plate and the condyle positioning component are of an integrated structure and can be separated along the segmentation structure, the condyle positioning component is suitable for being fixed to the front edge of the ramus of the mandible of a patient, and the tooth retention guide plate is manufactured based on the tooth form of the mandible part of the patient and fixed to the corresponding dentition. The condyle positioning component is connected with the lower jaw fixator through a mortise and tenon joint structure so as to position the specific position of the condyle of the patient after the lower jaw operation.

The invention discloses a thighbone inverted-hitting intramedullary nail entry point guide plate and a preparation method thereof, and aims to improve the precision and efficiency of a thighbone intramedullary nail operation. The guide plate comprises an attaching plate and a guide column, the attaching plate is provided with an attaching face precisely matched with a femoral intercondylar fossa and an inner side condylar area, it is ensured that the guide plate can be stably attached to the distal end of the femur, and stable support is provided for an operation. One end of the guide column is connected with the pasting plate, the other end of the guide column extends towards the proximal femur, a guide hole is formed in the guide column, the central axis of the guide hole is strictly collinear with a preset needle inserting point at the distal femur, and reliable guidance is provided for accurate insertion of an intramedullary nail. The guide plate can be prepared before an operation, assists a doctor in quickly positioning a needle inserting point during the operation, effectively shortens the operation time, improves the operation efficiency, reduces the operation risk, and provides an efficient and accurate auxiliary tool for the femoral intramedullary nail operation.

The invention relates to the technical field of medical image processing, and discloses a temporomandibular joint three-dimensional reconstruction system based on joint imaging diagnosis. The system utilizes CBCT equipment to collect temporal-mandibular joint tomographic image data, and extracts facial feature sites and maxillofacial joint standard model approval sites through a multi-scale residual network. And carrying out space registration by adopting an affine transformation and nonlinear optimization algorithm to generate a synchronous correction parameter, further carrying out deformation interpolation on the standard model of the maxillofacial joint to construct a maxillofacial model, and adjusting the position of a condylar process. And based on the deformed maxillofacial model, generating an occlusal plate structure model by using an isogeometric analysis method, and iteratively optimizing the degree of fit through an edge calculation frame. The system can accurately reconstruct the three-dimensional model of the temporomandibular joint, optimizes the adaptation of the biteplate, provides powerful support for the diagnosis and treatment of temporomandibular joint diseases, and facilitates the improvement of the diagnosis and treatment level.

The invention relates to a hinge type knee joint prosthesis which comprises a thighbone component (101), and the thighbone component comprises two condyles (101c and 101c ') and a hinge box (237). A tibial component (108); and a connecting member (150) connected to the tibial member (108) and the femoral member (101). The connecting component (150) comprises a box cover (102) connected with the thighbone component (101); the t-shaped joint (103) is connected with the box cover (102); the pivot pin (104) is connected with the t-shaped joint (103) and the box cover (102); the axial bushing (105) is connected with the pivot pin (104) and the t-shaped joint (103); and the axial locking screw (106) is used for fixedly connecting the axial bushing (105), the pivot pin (104) and the t-shaped joint (103) with one another. The box cover (102) comprises a connecting piece (201). The connecting piece (201) is used for avoiding contact between the femoral component (101) and the t-shaped connector (103).

The utility model discloses a unicondylar replacement rongeur, which relates to the technical field of medical instruments and comprises a jaw, a front arm, a rear arm, a front shaft, a middle shaft, a handle, a limiting clamp, a plate spring and a rear shaft. The jaw is arranged at the front ends of the front arms, the two front arms are rotationally connected through the front shaft, and the occlusion opening distance of the jaw is large and can reach 9 mm to the maximum. The occlusion opening is enlarged, so that larger and thicker osteophyte can be accommodated, occluded and removed; hyperplastic osteophyte at each part of the quasi-circular patella and osteophyte at the edge of the femoral condyle can be bitten and removed through the design of the circular bend of 100 degrees, and convenience and high efficiency are achieved; the front mouthpiece which is long enough can cover patella length of any countryside, so that osteophyte can be treated conveniently; and the distance between the two shafts is increased, so that a farther and more hidden osteophyte can be processed.

A temporomandibular joint replacement system includes an insert configured to be disposed on an articular surface of a temporomandibular joint, a biocompatible fluid including a synthetic synovial fluid, a porous condyle configured to contain the biocompatible fluid and to be disposed on an opposing surface of the temporomandibular joint, and a sensor disposed along a top surface of the insert.

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.

This invention provides a fixation device and assembly method for pericondylar fractures of the knee joint prosthesis. The knee joint prosthesis includes a femoral condyle, a tibial plateau, and a tibial pad. The femoral condyle includes an anterior condyle, two posterior condyles, and an intercondylar fossa. A fixation device is installed in the intercondylar fossa, comprising an intramedullary fixation pin and a connecting fixation block. The connecting fixation block is installed within the intercondylar fossa and engages with the force-applying end of the intramedullary fixation pin. The connecting fixation block includes a main body with a top surface facing the tibial pad and a bottom surface opposite the top surface. The bottom surface extends away from the top surface to form a protrusion, and a through hole is formed within the protrusion, which is used to accommodate and fix the force-applying end of the intramedullary fixation pin. This invention embeds the entire connecting fixation block within the intercondylar fossa, fully utilizing the existing intercondylar fossa space of the PS-type prosthesis to establish a precise channel for the intramedullary fixation pin, thereby fixing the pericondylar fracture through structural fit.

A method is provided for performing a quadruped unicompartmental stifle arthroplasty. The method includes cutting a plateau of a tibia to form first cut surfaces. The method also includes cutting a medial condyle of a femur to form second cut surfaces. The method also includes aligning openings in a first trial device with the first cut surfaces and forming first holes in the first cut surfaces by passing a drill through the openings in the first trial device. The method also includes aligning openings in a second trial device with the second cut surfaces and forming second holes in the second cut surfaces by passing a drill through the openings in the second trial device. The method also includes mounting a first implant device to the first cut surfaces and mounting a second implant device to the second cut surfaces. A system is also provided for performing the method.

A method of positioning posterior resection guides in a three-dimensional coordinate system using robotic arms to perform partial knee arthroplasties comprises connecting a first tracking device for a surgical tracking system of the robotic arm to a femur, connecting a second tracking device for the surgical tracking system of the robotic arm to a tibia, manually positioning the tibia relative to the femur to a desired orientation to perform a posterior resection, manually determining a position for the posterior resection guide to perform the posterior resection, digitizing a reference point for the posterior resection guide in the three-dimensional coordinate system for a location of a feature of the posterior resection guide, moving the posterior resection guide to the location in the three-dimensional coordinate system with the robotic arm, and resecting a posterior portion of a condyle of the femur using the posterior resection guide to guide a cutting instrument.

Assemblies, systems, kits, and methods related to the positioning of the distal femoral resection guide anteromedially on an exposed condyle of the distal femur. Assemblies, systems, kits, and methods related to the positioning of the proximal tibial resection guide anteromedially on an exposed proximal tibia.

An orthopedic instrument (10) for a knee arthroplasty, the instrument including: a base (12) having one or more paddles (36) configured to seat against and reference one or both of a medial condyle and a lateral condyle of a femur; a body (14) linked to the base for rotation relative thereto, wherein the body includes a recess and slot therein and a first indicia (24) along a first face of the body adjacent the slot; a post (20) received in the recess and moveable relative to the body, wherein the post has a second indicia (28) used with the first indicia to determine a posterior size of the femur; and an adjustment mechanism (18) having a third indicia (30) to indicate a rotation of the femur, wherein the adjustment mechanism is configured to rotate the body relative to the base to a desired orientation based upon the rotation of the femur.

Embodiments of the present application provide a femoral condyle prosthesis and a femoral prosthesis with the femoral condyle prosthesis. The femoral condyle prosthesis comprises a femoral condyle, which comprises a medial condyle and a lateral condyle for corresponding cooperation with a tibia, the medial condyle and the lateral condyle are connected to each other to form an anterior condylar surface, and a middle of the anterior condylar surface is recessed to form a trochlear groove for accommodating a patella, a line connecting the lowest points of the trochlear groove is a prosthesis patella trajectory line, and the prosthesis patella trajectory line is located outside a midpoint of an intercondylar notch at a position near the lowest point of the trochlear groove of the femoral condyle. Therefore, the femoral condyle prosthesis of the embodiments of the present application can greatly reduce the problem of knee pain in the large flexion movement of the knee joint.

A surgical instrument system for use in a total knee arthroplasty includes a reference block that is attachable to a femur. The reference block has a block front side and a block rear side lying opposite the block front side. At least one compensation element has an element rear side and, lying opposite along the proximal-distal axis, a contact face for contacting a lateral condyle and / or medial condyle. A connection system has at least one connection portion on the reference block. At least one complementary connection portion is disposed on the compensation element. The connection system is configured to releasably attach the compensation element on the block front side. The compensation element in the attached state does not completely cover the block front side. The connection system is configured so that the compensation element is attachable in different positions on the block front side by the connection system.

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.

The present invention relates to an artificial intelligence-based dentition matching and jaw bone segmentation method, system and medium, including the following steps: S1, constructing a dentition matching algorithm under constrained movement to obtain an objective function for matching a digital dentition model with the dentition of a skull model; S2, minimizing the objective function to obtain an automatic matching method for the upper and lower dentitions with the dentition of the skull model, and the translation and rotation methods of the upper and lower dentitions. The jaw bone segmentation method includes: using this dentition matching method to replace the tooth part on the three-dimensional skull model with the upper and lower dentitions of the digital dentition model; then automatically segmenting the condyles of the three-dimensional skull model to complete the automatic segmentation of the jaw bone of the three-dimensional skull model. This application constructs an intelligent dentition matching method and jaw bone segmentation method for orthognathic surgery, which can automatically complete the important links of jaw bone segmentation and dentition matching in digital orthognathic surgery design by computer, so as to reduce the workload of clinicians and improve work efficiency.

A system and method for creating a model of a patient's mandible and any teeth supported from the mandible and manipulating the mandible relative to anatomical features of the patient's maxilla. The system uses markers positioned on the mandible and on the maxilla to create a functional mandibular axis that approximates an axis through the condyles of the patient. The functional mandibular axis and geometric and anatomical information about the patient's upper and lower jaw are then used to create prostheses for the patient. The system is also used for making corrections to the prosthesis.

This invention relates to the field of artificial joint prosthesis technology, and discloses an anatomical femoral condyle knee joint prosthesis that does not preserve the cruciate ligament. The prosthesis includes a femoral condyle, a tibial plateau pad, and a tibial plateau support. The femoral condyle comprises a medial condyle and a lateral condyle. The medial and lateral condyles, in lateral view, respectively form medial condyle curve contours and lateral condyle curve contours. The medial condyle curve contour is located lateral to the lateral condyle curve contour, and the movement trajectory length of the medial condyle curve contour is 15%-25% longer than that of the lateral condyle curve contour. The tibial plateau pad has medial condyle curved grooves and lateral condyle curved grooves that respectively conform to the medial and lateral condyles. The slope of the medial condyle curved groove is greater than that of the lateral condyle curved groove. This invention provides an anatomical femoral condyle knee joint prosthesis that does not preserve the cruciate ligament, solving the problem of poor compatibility between existing prostheses and surrounding tissues after implantation.

The utility model provides a single-condyle tibial prosthesis grinding tool, and belongs to the technical field of medical instrument machining. The utility model provides a single-condyle tibia prosthesis grinding tool which comprises a tool body, an installation position used for installing a single-condyle tibia prosthesis is arranged on the tool body, a single-condyle tibia prosthesis main board is arranged on the installation position, and an installation groove used for installing a single-condyle tibia prosthesis bottom board is formed in the installation position. And a mounting hole matched with the mounting rod is formed in the tool main body. According to the grinding tool for the unicompartmental tibia prosthesis, the tool body is installed on the installation rod, the tool body is arranged on the grinding device through the installation rod, the installation position is arranged on the tool body, the bottom plate of the unicompartmental tibia prosthesis is embedded into the installation groove in the installation position, the fixing stability is improved, and the grinding efficiency is improved.

A method for generating a reference system for kinematic alignment is performed by acquiring a 3D model of a patient's femur at a pre-operative stage and selecting a plurality of points on the anterior cortex (11C) of a distal end (10) of the femur, on a distal superficial portion of each condyle (11 A, 11 B), and on a posterior superficial portion of each condyle (11 A, 11 B). A provisional coronal plane (CP-CP) passing through the 3 reference points (12) and, for each condyle (11 A, 11 B), a distal approximating surface (15) and a posterior approximating surface (16) are then generated as a function of these points. The approximating surfaces are used to generate an axial plane (A-A) perpendicular to the provisional coronal plane (CP-CP), facing the distal superficial portions and tangent to each distal approximating surface (15) and a final coronal plane (C-C) perpendicular to the axial plane (A-A), facing the posterior superficial portions and tangent to each posterior approximating surface (16). The reference system is defined by the axial plane (A-A) and the final coronal plane (C-C).

The invention provides a far-end shaping system and a matching module, and belongs to the technical field of artificial joints. An osteotomy module; the inserting rod is fixedly connected to one side end of the osteotomy module; the force line positioning module is arranged on one side of the osteotomy module; the problems that according to an existing thighbone far-end shaping system, due to the fact that matching problems occur in the operation of all assemblies, the osteotomy amount is inaccurate, and the osteotomy position deviates in thighbone osteotomy are solved. The problems that when an existing femoral far-end shaping system for the unicompartmental condyle surgery is used in cooperation with other instruments, large errors exist, the osteotomy amount is not accurate and the osteotomy position deviates during femoral osteotomy, and consequently secondary osteotomy needs to be conducted on the femur are solved, the risk that wounds of patients are infected or subjected to secondary injuries is reduced, and the patient experience is improved. Meanwhile, the problem that the osteotomy amount of a surgical tool cannot be flexibly adjusted according to the bone defect amount of a patient is solved.

The invention relates to the technical field of medicine, in particular to a minimally invasive construction method of a pig bone load-bearing and non-load-bearing area cartilage injury animal model, which comprises the following steps of: performing modeling based on pig CT (Computed Tomography) data; setting boundary conditions and applying a load; determining a stress area and a non-stress area according to a finite element analysis result; minimally-invasively exposing the medial condyle of the femur and performing osteochondral injury modeling; and noninvasively exposing the thighbone tackle cartilage and carrying out osteochondral injury modeling. According to the method, the stress area and the non-stress area of the pig knee joint are accurately defined through the finite element analysis technology. A minimally invasive surgery approach is creatively developed, full exposure of cartilages in different stress areas of the knee joint is achieved, and an important tool is provided for deep repair and reconstruction of cartilage injuries.

The utility model discloses a tibia vertical osteotomy auxiliary device for unicompartmental knee arthroplasty, and relates to the technical field of unicompartmental knee arthroplasty. The device comprises a base, a stand column, a machine box, a winding shaft, an inhaul cable and a drag hook, a fixing area is arranged in the middle of the base, the stand column is arranged at the upper end of the base, the machine box is arranged above the stand column, and a small self-locking motor is fixed in the machine box. According to the utility model, the inhaul cable and the drag hook are locked through the small self-locking motor, the winding disc, the motor driver and the touch screen, so that medical personnel can adjust the degree of tightness of traction according to the number of turns of winding of the winding disc as required, and an assistant can carry out long-time bare-handed traction; secondly, the two extendable extension rods and the corresponding drag hooks are mounted on the mounting seat, so that the medical staff can adjust the distance between the two drag hooks according to the exposure requirement of the surgical incision, the surgical exposure area is expanded, and a doctor can conveniently perform an operation.

To provide a partial knee implant and a method for installing the same.SOLUTION: The present disclosure is a femoral preparation guide and a kit of surgical components related to the femoral preparation guide. The femoral preparation guide is for use on a condyle of a femur during a surgical procedure in which the condyle receives a femoral condyle implant. The femoral preparation guide includes a posterior portion for fitting over a posterior region of the condyle and a distal portion for fitting over a distal region of the condyle. The distal portion is angled relative to the posterior portion. The distal portion includes first and second resection slots for receiving cutting tools that provide two resections of the condyle. The first and second cutting slots are angled relative to each other.SELECTED DRAWING: Figure 1C

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 application provides a single condyle prosthesis, which comprises a platform part, a side wall of the platform part comprising a planar side wall and an arc-shaped side wall, a flexible piece arranged on the platform part, an upper surface of the flexible piece forming a supporting surface, a connecting plate arranged on the platform part and located at a side of the flexible piece, the connecting plate being arranged adjacent to the planar side wall and having a spacing between the connecting plate and the planar side wall, a convex edge being arranged on a side of the connecting plate away from the platform part, the convex edge protruding towards the planar side wall, and a containing groove being formed between the convex edge, the connecting plate and the platform part. The technical scheme of the application effectively solves the problem of poor fixing effect of the single condyle prosthesis in the related art.

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.