67 results about "Condyle" patented technology

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 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 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.

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.

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.

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.

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 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.

Embodiments of the present application are applicable to the technical field of computer-aided medical treatment and surgical planning, and provide a single-condyle mobile platform surgical planning method and a computer device. The method comprises: determining a plurality of prostheses to be planned, the prostheses comprising femoral prostheses and tibial prostheses, and the femoral prostheses all being spherical prostheses; placing the femoral prostheses with the distal end point of a pre-constructed femur three-dimensional model as the center, and adjusting the femoral prostheses to target femur positions; calculating femur section coverage rates of the femoral prostheses at the target femur positions; determining a target femoral prosthesis from the plurality of femoral prostheses according to the femur section coverage rates; determining a target tibial prosthesis from the plurality of tibial prostheses, and performing preoperative planning of a single-condyle mobile platform knee joint replacement surgery based on the target tibial prosthesis and the target femoral prosthesis. By using the above method, preoperative prosthesis planning can be performed for single-condyle knee joint surgery of a mobile platform.

The application provides a self-conchal process condyle and mandible reconstruction bone support type guide plate and titanium plate assembly, which comprises a condyle reconstruction osteotomy guide plate, a condyle reconstruction fixed titanium plate, a mandibular median joint osteotomy guide plate and a mandibular median joint fixed titanium plate. The combination of the above-mentioned bone support type guide plate and titanium plate assembly improves the accuracy of the self-conchal process condyle and mandible reconstruction through CAD / CAM combined with screw rail transfer technology, helps to shorten the operation time, and is beneficial to the recovery of the occlusal function after the mandibular body reconstruction.

The invention discloses a condylar test mold capable of measuring pressure, and relates to the technical field of medical instruments, the condylar test mold comprises a condylar test mold, a piezoresistive sensor, an intercondylar drill bushing and an intercondylar test mold, the condylar test mold and the piezoresistive sensor are assembled and combined, and when the condylar test mold with the piezoresistive sensor is started, the intercondylar drill bushing is inserted into the intercondylar test mold. The pressure value of the piezoresistive sensors at the same position can be displayed on the display in real time, when the condyle test mold is installed and in the process that an inner molded surface is attached to a bone, the reading of the piezoresistive sensors can be read, whether the condyle test mold is attached to the bone or not and whether the condyle test mold is installed obliquely or not can be checked, and the intercondylar drill bushing is arranged on the condyle test mold. The trephine and the square osteotome are driven into the intercondylar drill sleeve, the non-intercondylar position in the state is molded at the moment, the intercondylar test mold is arranged on the condylar test mold, the intercondylar test mold can be installed on the molded intercondylar, the reset result is finally confirmed, and the intercondylar drill sleeve has the effects of being accurate in installation and saving operation time.

A surgical registration tool including a bone engagement structure comprising a distal condyle abutment structure, at least one posterior condyle abutment structure, a side condyle abutment structure, and an anterior shaft abutment structure. The distal condyle abutment structure includes a distal planar surface. The at least one posterior condyle abutment structure includes at least one planar surface extending distally from the distal planar surface and positioned perpendicular to the distal planar surface. The side condyle abutment structure includes a planar surface extending distally from the distal planar surface and positioned perpendicular to the distal planar surface and the at least one planar surface. The anterior shaft abutment structure extends distally from the distal planar surface and terminates at a distal tip. The registration tool also includes a handle coupled to the engagement structure and extending proximally therefrom, and a tracker array configured to couple to the handle.

An artificial knee joint 1 includes: an insert member 2 embedded in a part of a joint surface of a medial condyle MC or lateral condyle LC of a tibia T; and a bridge member 3 disposed underneath the insert member 2, and having a length that allows both ends thereof to be anchored to a cortical bone of a tibia T.

The invention discloses a novel invisible appliance for treating temporomandibular joint disease pain, which relates to the field of medical instruments and comprises a rear tooth socket, an upper jaw invisible appliance and a lower jaw invisible appliance, the rear tooth socket is arranged at the rear ends of the invisible upper jaw appliance and the invisible lower jaw appliance, an upper jaw pad is arranged at the bottom end of the invisible upper jaw appliance, and a lower jaw pad is arranged at the top end of the invisible lower jaw appliance; canine tooth sleeves are arranged on the upper jaw invisible orthodontic appliance and the lower jaw invisible orthodontic appliance, a traction hook is arranged at one end of each canine tooth sleeve, and an elastic traction ring is arranged on the periphery of each traction hook; the posterior tooth interlocking structure and the anterior tooth vertical traction structure are integrated into the invisible orthodontic appliance, so that orthodontic treatment and temporomandibular joint disease pain treatment are integrated, the treatment period is shortened, and patient compliance is improved; the V-M interlocking structure accurately locks the lower jaw, the vertical traction realizes condylar process reduction, the pain is relieved from pathogenesis, the digital design can realize personalized adaptation, and the double stable curative effects of correction and pain treatment are ensured.

The invention discloses application of NAC in preparation of a medicine for treating temporomandibular joint disorder, and particularly discloses application of the medicine in effectively improving TMD joint tissue oxidation resistance, inhibiting inflammation level, promoting extracellular matrix secretion and inhibiting iron (ferrous) ions and lipid peroxides so as to improve cartilage injury, relieve pain in a condylar process region and improve osteoarthritis. As a clinical common medicine, NAC is low in cost, high in availability, excellent in cell and tissue safety and high in practicability. The medicine can be safely applied to TMD treatment by means of condyle local injection or condyle region skin application (microneedle) and the like, has important significance in clinical medication of TMD, and has good medication value and application prospect.

Knee joint laxity testing apparatus includes a thigh cradle assembly, a shank cradle assembly, and a heel cradle assembly. The apparatus is configured to measure knee laxity in three planes of motion: anterior-posterior translations; varus-valgus rotations; and internal-external rotations. The thigh cradle assembly, shank cradle assembly, and heel cradle assembly are mounted on a common base. A thigh fixation system is attached to the thigh cradle assembly both at the proximal and distal ends to firmly stabilize the thigh in the thigh cradle. The patella pad and distal thigh fixation system are mounted on a U-bar assembly. The distal thigh fixation system includes two condyle pad adjustment arms upon which a respective condyle pad is mounted, and a patella pad mounted to a linear track on an underside of the U-bar assembly.

The present application relates to the technical field of medical devices, and discloses a knee joint prosthesis, which comprises a trabecular bone type, one side of the trabecular bone type is provided with a front condyle side, the other side of the trabecular bone type is provided with a notch, both ends of the trabecular bone type notch are provided with distal end sides, the upper surface of the distal end side is provided with a trabecular column, one side of the distal end side is provided with a rear condyle side, the side wall of the trabecular bone type is provided with a femoral condyle body, the inside of the trabecular column is provided with a column, one side of the rear condyle side is provided with a femoral component surface, and the outer wall of the femoral component surface is provided with. The femoral side prosthesis realizes better fusion of the femoral side prosthesis and bone tissue, promotes bone ingrowth, and achieves the effect of long-term stable fixation. The problems of poor long-term stability, easy loosening and easy wear of the friction interface of the traditional femoral side prosthesis are solved, and the service life of the prosthesis and the life quality of the patient are improved.