27 results about "Acetabulum" patented technology

Systems and methods for real-time navigation of reaming of an acetabulum are disclosed. A first tracking element is interfaced to a reamer. A second tracking element is interfaced at or near the acetabulum. The first tracking element can be interfaced to an outer casing surrounding a portion of the shaft of the reamer. A depth and a tilt angle of the reamer with respect to the acetabulum are determined, based on a location of the first and second tracking elements. Based on a surgical plan, the depth and the tilt angle, the volume of removed bone from the acetabulum can also be determined.

The invention discloses a 3D printed acetabulum accurate positioning operation guide plate, which comprises a head part, a body part and a tail part, the body part is used for connecting the head part and the tail part, and the tail part comprises a fixing piece fixed on a residual iliac ridge of a patient and an adjusting assembly for changing the position of the head part. According to the 3D-printed acetabulum precise positioning operation guide plate, the connecting rod and the fixing ring are rotationally connected through the vertical rotating shaft, the connecting rod and the mounting ball are rotationally connected through the transverse rotating shaft, then the tail position can be rotated at will, the position of the head can be changed, a preoperative template prosthesis can be completely matched with an actual osteotomy area of a patient, and the accuracy of the acetabulum precise positioning operation guide plate is improved. In addition, adjustment is carried out according to actual conditions in the surgical operation process, accurate positioning of the original acetabulum can be achieved, and it can be guaranteed that the forward-leaning abduction angle of the original acetabulum is recovered.

The present invention discloses a visualization method for acetabulum grinding. The method determines the grinding area by generating a hemispherical shell model, performs color area division in combination with the vtkbool module, and establishes an acetabulum color separation model. During the operation, the acetabulum color separation model is updated in real time using a grinding head model, and VTK Boolean operations are used to maintain surface smoothness without the need for data format conversion, thereby improving computing efficiency and model accuracy. The present invention effectively solves the problems of granularity and low computing efficiency in the prior art, and provides accurate and efficient visual feedback for navigated acetabulum replacement surgery.

The invention provides an adjustable acetabulum prying-out experimental device, and belongs to the technical field of combined acetabulum component separation experiments. A T-shaped sliding groove is formed in the lower end of the eccentric prying-out base and used for being fixedly connected with a workbench through screws; the crow plate lifting device comprises a lifter support, a connecting block, a threaded lifting rod, an adjusting nut, a first M6 thread and a sliding block, and modularization and function cooperation of the testing system are achieved by integrating the eccentric prizing base, the crow plate lifting device, the acetabulum assembly loading device and the adjustable crow plate device; by means of the structural design, the device can meet the multi-dimensional adjustment requirements of the moment arm distance, the supporting point position and the height at the same time, and the problem that a traditional device is insufficient in adaptability due to the single structure is solved. Precise cooperation among the components not only improves operation flexibility, but also ensures structural stability in the testing process through high-strength connection.

The acetabular file connecting rod comprises a shaft sleeve, a torsion bar piece is arranged in the shaft sleeve and rotationally connected with the shaft sleeve, a connecting part is arranged at the position, located on the outer side of the shaft sleeve, of one end of the torsion bar piece and used for being connected with an external power driving device, and a connecting assembly used for being connected with an acetabular file is arranged at the end, away from the connecting part, of the torsion bar piece. The connecting assembly comprises a positioning seat and a locking piece installed in a sliding mode. The shaft sleeve provides rotating support for the torsion bar piece, the positioning seat achieves preliminary positioning of the acetabulum file and the torsion bar piece, the locking piece is installed in a sliding mode to lock the acetabulum file and the torsion bar piece, the connecting part is connected with an external power driving device, efficient power transmission is achieved, and it is guaranteed that the acetabulum file is always kept in a stable state in the grinding process; the acetabulum grinding device has the advantages that the acetabulum grinding efficiency is guaranteed, and the dual requirements of an operation for accuracy and efficiency are met.

The utility model relates to an acetabulum lining clamping installer which comprises a clamping piece and a separating piece, the clamping piece comprises a column body and a plurality of clamping jaws extending from the peripheral face of the column body in the radial direction, the column body is provided with a through hole penetrating in the axial direction, each clamping jaw comprises a clamping face matched with the outer surface of an acetabulum lining, and the separating piece is arranged on the clamping face. The acetabulum lining can be clamped and fixed through the clamping faces of the multiple clamping jaws. The separation piece comprises a spherical segment part matched with the inner surface of the acetabulum lining and a rod part extending out of the middle of the spherical segment part in the axial direction; the rod portion of the separating piece is located in the through hole of the column body, the separating piece can move in the axial direction of the column body to enable the acetabular lining to be separated from the clamping piece, and the acetabular lining can be conveniently installed in an acetabular cup.

A universal blocking screw for an acetabulum comprises a blocking sleeve for limiting the position of the acetabulum, the upper end surface of the blocking sleeve is provided with a first spherical groove, the lower end is provided with a ball socket, the ball head of a ball head screw can be rotatably fitted in the ball socket of the blocking sleeve, the screw portion extends outward, the bottom of the first spherical groove and the ball socket are connected through an internal threaded hole, a stop ring is threadedly fitted in the internal threaded hole to limit the retreat of the ball head screw, the screw portion of the ball head screw is provided with a prismatic section for applying torque near the ball head, the top of the ball head of the ball head screw is provided with an inner hexagonal countersunk hole, the inner hole of the stop ring makes way for a tool inserted into the inner hexagonal countersunk hole at the top of the ball head, and the lower end surface of the stop ring is provided with a second spherical groove matching the ball head.

The utility model discloses an acetabulum posterior wall fixing steel plate which comprises a steel plate body and extending parts, the shape of the steel plate body is matched with the shape of the acetabulum posterior wall, steel plate fixing nail holes are evenly formed in the surface of the steel plate body, and the extending parts are detachably arranged on the upper end face and the lower end face of the steel plate body. And an extension part fixing nail hole is formed in the surface of the extension part. The problem that the size of an existing acetabulum posterior wall fixing steel plate cannot be conveniently adjusted according to the bone size of a patient is solved.

The present application relates to the medical technical field, especially to navigation type acetabulum grinding smooth display method, including the following steps: S1, the cup model is moved to the predetermined position of acetabulum model;S2, the acetabulum volume rendering data generation;S3, the acetabulum volume rendering data is smoothed, and image channel is split in turn, single-channel image gaussian filter, single-channel image selective merging;S4, the acetabulum model is colored according to the volume rendering data after smoothing;S5, acetabulum grinding visualization operation.The present application only needs to be converted from surface mesh data to volume rendering data once after cup planning is completed, and surface mesh data is not needed to be generated from volume rendering data for visualization in grinding process, on the basis of fast grinding calculation speed, the smoothing of acetabulum image rendering is also realized, and the use experience is optimized.

This invention relates to the field of medical devices. To address the technical problems of easy loss of reduction, uncontrollable pressure, and poor reduction stability when fixing a quadrilateral acetabulum in existing technologies, this invention proposes a pressure-type anatomical reduction device specifically for the quadrilateral acetabulum. The device includes a pressure reduction plate and a limiting fixation plate. One end of the pressure reduction plate is connected to one end of the limiting fixation plate via an arc-shaped connecting section. A conical positioning post is provided on the other end of the limiting fixation plate for pre-positioning a second fracture fragment. The extension direction of the conical positioning post intersects with but is not perpendicular to the axis of the limiting fixation plate. At least one limiting screw hole is provided on the limiting fixation plate, through which the limiting fixation plate attaches and positions the second fracture fragment. Multiple reduction screw holes are provided on the pressure reduction plate, through which the pressure reduction plate applies pressure to reduce the first fracture fragment. Furthermore, this invention also proposes a method for using the pressure-type anatomical reduction device specifically for the quadrilateral acetabulum.

The application relates to a kind of acetabulum grinding tool test system and method.The acetabulum grinding tool test system includes test tool and test component arranged in the test tool;The test tool includes driving assembly, force sensor and grinding tool, the driving assembly drives the force sensor or the grinding tool moves;The test component includes acquisition component and reproduction component, wherein the acquisition component is used to acquire force information when simulating real acetabulum grinding in acquisition state, and the reproduction component is used to reproduce the force information in reproduction state;By acquisition component, the stress data during actual grinding is acquired, and subsequent grinding test is carried out using reproduction component with relatively small friction, to reduce consumable consumption and reduce test cost.

The present invention relates to the technical field of medical image processing, and provides a system for acetabulum and femur segmentation and femoral head identification, the system comprising a memory, an image acquisition apparatus and a processor. The processor comprises: an image reading module, configured to read an acetabulum-femur image; an image segmentation module, configured to use a region growing algorithm to perform segmentation of the acetabulum-femur image on the basis of a pixel value range of pixels, wherein a region formed by pixels within the pixel value range is an acetabular position segmentation map or a femoral position segmentation map; and a femoral head identification module, configured to use a femur identification algorithm to identify the femoral head on the basis of the femoral position segmentation map, and calculate the sphere center position and the maximum radius of the femoral head. The system involves a clear and simple execution process, allows users to automatically adjust input parameters of the algorithms on the basis of data, so as to be suitable for lesion images of different types, and, while achieving the same effects, reduces the development costs, improves the development efficiency, and ensures rapid verification for preoperative planning.

1. Name of the product in this design: Posterior wall reconstruction plate of the acetabulum. 2. Purpose of this design: Steel plate for fixing fractured acetabulum. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

An acetabulum anterior-posterior column and acetabulum bottom transverse lag screw placement device comprises a base plate, the upper surface of the base plate is rotationally connected with a guide part, the base plate and the guide part are provided with guide channels matched with each other, the guide channels can allow guide needles to pass through, and the outer side face of the guide part is connected with a positioning structure used for being attached to the outer edge of an ischium closed hole. The positioning structure is provided with an adjusting piece capable of adjusting the distance between the positioning structure and the guiding piece, as the anatomical structures of patients have individual differences, the sizes and the shapes of acetabulum of different patients, the spatial position relation of front and rear columns and the like are not completely the same, and the distance between the positioning structure and the guiding piece can be adjusted; the screw placement device can be better attached to the specific acetabulum form of a patient, the accuracy and safety of screw placement are improved, and screw placement deviation caused by individual differences is reduced.

The present invention relates to the technical field of medical image processing, and provides a system for segmenting the acetabulum and femur and identifying the femoral head, including a memory; an image acquisition device; a processor; the processor includes: an image reading module for reading an acetabulum-femur image; an image segmentation module for segmenting the acetabulum-femur image by using a region growing algorithm according to the range of pixel values of pixel points, and the region surrounded by the pixel points within the range of pixel values is an acetabulum position segmentation map or a femur position segmentation map; a femoral head identification module for identifying the femoral head by using a femur identification algorithm based on the femur position segmentation map, and calculating the center position and the maximum radius of the femoral head. The system execution process is clear and simple, the input parameters of the algorithm can be automatically adjusted by the user according to the data situation, it is applicable to different types of lesion images, saves the development cost and improves the development efficiency under the condition of achieving the same effect, and provides a guarantee for the rapid verification of preoperative planning.

The utility model relates to the field of acetabulum file connecting rods, in particular to an acetabulum file connecting rod with a splitting mechanism, which comprises a connecting rod body, the connecting rod body comprises a fixed end part, a T-shaped ring seat is fixedly sleeved on the outer wall of the fixed end part, a connecting piece is inserted on one side of the fixed end part, a limiting ring is sleeved on the outer wall of the connecting piece, and the limiting ring and the connecting piece are in threaded connection. A plurality of auxiliary parts are inserted between the limiting ring and the connecting part at equal intervals, the connecting part is provided with an acetabulum file body, and a limiting assembly is inserted in the connecting part and located on one side of the acetabulum file body. According to the acetabulum file connecting rod, the connecting piece, the limiting assembly and the limiting ring are matched with the T-shaped ring base at the fixed end, the connecting rod body and the acetabulum file body can be rapidly disassembled and assembled, and meanwhile, the stability of the acetabulum file after being assembled can be ensured through the matching arrangement of the auxiliary piece.

The utility model provides an acetabulum front and back column through the acetabulum bottom horizontal line pull screw setting device, including the base plate, the upper surface rotationally connected with the guide piece of base plate, the base plate and guide piece are equipped with the mutual adaptation's guide channel, the guide channel can pass through the guide needle, the outside surface of guide piece is connected with the positioning structure for the close contact of ischial obturator outer edge, and the positioning structure is equipped with the adjusting part that can adjust the distance between positioning structure and guide piece, because the patient's anatomical structure has individual difference, the size, shape, front and back column's spatial position relation etc. of different patient's acetabulum are not exactly the same, the distance between adjustable positioning structure and guide piece, can make the setting device better close patient's specific acetabulum form, improve the accuracy and safety of screw setting, reduce the setting deviation caused by individual difference.

The invention discloses a disposable acetabulum file and a tool block replacing method, the disposable acetabulum file comprises a hemispherical tool rest and a file, the hemispherical tool rest is of a hemispherical shell structure formed through plastic injection molding, and a crosshead used for clamping is integrally formed at the bottom of the hemispherical tool rest through injection molding; a plurality of filing holes are formed in a shell of the hemispherical knife rest, the files are fixedly connected to one sides of the filing holes, and the cantilever ends of the files stretch into the filing holes and protrude out of the outer spherical wall of the hemispherical knife rest. The semispherical cutter rest made of plastic is adopted to support the file, so that the cost of expensive metal materials is reduced, and cross infection is avoided.

In a method for matching a hip cup based on a medical image provided in the specification, a full hip frontal medical image is determined by a computer. The medical image is input into a structure segmentation model to obtain a segmented image; the medical image is input into a key point detection model to determine the position of the key points. According to the segmented image, the outer edge of the hip structure is determined, and according to the position of the key points, the curve corresponding to the acetabulum on the outer edge is determined. According to the position of the key points, a first constraint function for constraining the center position of the acetabular cup is determined, and according to the curve, a second constraint function for constraining the size of the acetabular cup is determined. The first constraint function and the second constraint function are minimized as the optimization target, the target size of the acetabular cup is determined, and the target prosthesis is determined according to the target size.

A system for intra-operatively registering a pelvis comprising an acetabulum with a computer model of the pelvis in a coordinate system. The system may include: a) a surgical navigation system including a tracking device; and b) at least one computing device in communication with the surgical navigation system. The at least one computing device: i) receiving first data points from first intra-operatively collected points on an articular surface of the acetabulum, the first data points collected with the tracking device; ii) receiving a second data point from a second intra-operatively collected point on the pelvis, the second data point collected with the tracking device, the second data point corresponding in location to a second virtual data point on the computer model; and iii) determining an intra-operative center of rotation of the femur relative to the pelvis from the first data points.

Bone-sparing hip resurfacing surgery using only an acetabular component in which the femoral head articulates, being only shaved to a spherical shape and cleared of osteophytes that could impinge on the acetabulum and so restrict the range of motion. The inner surface of the resurfacing cup is aspherical in shape creating an annular contact with the femoral head. The inner, articulating surface of the cup is ADLC or pyrolytic carbon coated to reduce friction and wear of the femoral head. The surgical approach significantly reduces surgery time by avoiding the use of the femoral resurfacing component. The cup is preferably of the double-shell type for cementless fixation, but it can also be made as a single shell for cementless or cemented fixation. Should a revision surgery due to wear of the femoral head become necessary, the cup can be retained and combined with a dual mobility femoral component.

A method for fixating an artificial convex caput femur surface to the pelvic bone of a patient, the method comprising the steps of: exposing the acetabulum surface, creating a hole or recess in the pelvic bone from the acetabulum side of the pelvic bone, providing the artificial convex caput femur, comprising an elongated member to the hip joint, inserting said elongated member in said hole, and performing an action on the acetabulum side of the pelvic bone such that the elongated member is structurally changed on the abdominal side of the pelvic bone or inside the pelvic bone.

The invention relates to the technical field of orthopedic surgical instruments, in particular to an acetabulum file capable of continuously adjusting the size, which is used for solving the problem that the size of the existing acetabulum file is not easy to adjust, the acetabulum file comprises a transmission rod, the end part of the transmission rod is rotatably connected with a tool apron, and a plurality of blades are arranged on the tool apron in an annular array; the multiple blades jointly form the hemispherical acetabulum file head and can synchronously slide on the tool apron in the radial direction so as to be synchronously close to or away from each other, and therefore the size of the hemispherical acetabulum file head is adjusted. According to the acetabulum file, when the acetabulum file faces acetabulum with different sizes, the multiple blades are synchronously adjusted to synchronously linearly move towards the circle center position of the tool apron to be close to or far away from the circle center position, so that the diameter of the hemispherical tool bit formed by the multiple blades can be changed, and the acetabulum file is suitable for acetabulum with different sizes or different grinding requirements; and a plurality of acetabulum files with different sizes do not need to be alternately used.

A surgical guide system includes a shell trial having a convex side configured to engage an acetabulum, a concave side forming a cavity therein, and windows extending through the convex and concave sides for viewing bone. The system further includes a liner trial having a convex side configured to be received within the cavity of the concave side of the shell trial, and a concave side with recessed hole guides there, wherein more than one of the hole guides align with the windows of the shell trial when the liner trial is received therein. The system further includes an acetabular cup implant having a convex side configured to engage an acetabulum, a concave side, and a thickness extending between the concave and convex sides, the concave side defining a cavity configured to receive the liner trial.

The present invention discloses a method for determining acetabulum coverage, a surgical navigation method and device, an electronic device, and a storage medium. The method for determining acetabulum coverage includes: projecting a three-dimensional model containing a hip ball and acetabulum onto a two-dimensional projection plane; determining the first boundary of the hip ball projection area and the second boundary of the projection overlap area of ​​the hip ball and acetabulum in the two-dimensional projection plane; calculating the first area of ​​the hip ball projection area based on the first boundary, and calculating the second area of ​​the projection overlap area based on the second boundary; and determining the percentage of the ratio of the first area to the second area as the acetabulum coverage. This greatly reduces the amount of calculation, improves the calculation efficiency of the acetabulum coverage, and lays the foundation for intraoperative navigation to achieve real-time calculation of the acetabulum coverage.

The invention discloses an acetabulum registration method and device, a medium and a product, and relates to the technical field of medical image.The acetabulum registration method comprises the steps that first point cloud data corresponding to a pelvic bone surface model in a model local coordinate system is acquired; acquiring human body image data acquired by the image device, wherein the human body image data is in an image local coordinate system; performing data transformation on the first point cloud data to enable a position relation between the first point cloud data transformed into an image local coordinate system and a pelvic bone area in the human body image to meet a preset overlapping condition, and recording the transformed first point cloud data as second point cloud data; registration calculation is carried out based on the second point cloud data and the first point cloud data to obtain a first registration matrix, registration is carried out by combining an augmented reality technology and taking overlapping of a pelvic bone model projection position and a pelvic bone position as a target, and the problem of large registration error caused by unreasonable position marking can be effectively avoided.

The utility model discloses a movable clamping anti-shake device of acetabulum file relates to medical instrument technical field, including holding rod and acetabulum file rod handle, the top of holding rod is rotatingly connected with rotating shaft no. 1, the top of rotating shaft no. 1 is rotatingly connected with rotating shaft no. The side, close to the holding rod, of the second rotating shaft is rotationally connected with a third rotating shaft, and the first rotating shaft, the second rotating shaft and the third rotating shaft are used for preventing the acetabulum file rod handle from shaking. The acetabulum file has the main advantages that through the first rotating shaft, the second rotating shaft, the third rotating shaft, the three-axis acceleration sensor and the three-axis gyroscope, when it is detected that the posture of the holder is unstable or drifting occurs, the motion trail of the acetabulum file rod handle is controlled in real time through the multiple servo motors fixed to the rotating shafts; errors caused by drifting of a file rod or shaking of an operation hand are reduced, so that the precision and the success rate of an operation are improved.