28 results about "Acetabulum prosthesis" patented technology

A system for robot-assisted surgery includes a surgical robot having a robotic arm, an end effector coupled to the robotic arm, wherein the end effector is adapted to receive, translate, and orient a navigated surgical instrument; a camera tracking system adapted to intra-operatively track a pose of the navigated surgical instrument relative to a defined coordinate system; and a computer platform including a processor and a memory. In embodiments, the computer platform operative to display to a user an image of a target location on the patient and the pose of the navigated surgical instrument; and selectively control translation and orientation of the navigated surgical instrument based on a defined operational mode, to perform a surgical process under user control that comprises one or more of: reaming an acetabulum of the patient to a planned center of an acetabular prosthesis, or positioning the acetabular prosthesis in the reamed acetabulum.

An acetabular cub system is configured to be secured to a pelvis and may include an acetabular cup and a plurality of bone fasteners. The acetabular cup may include a bone engaging surface and an articulating surface, as well as a plurality of lobed fastener apertures extending from a first opening at the articulating surface to a second opening at the bone engaging surface. The plurality of bone fasteners may be insertable through the lobed fastener apertures to secure the acetabular cup to the pelvis. Each of the plurality of lobed fastener apertures may include a central aperture configured to receive a first bone fastener of the plurality of bone fasteners and one or more aperture lobes intersecting with the central aperture configured to receive a second bone fastener of the plurality of bone fasteners. The central aperture may be larger than the one or more aperture lobes.

Methods include tracking one or more of a leg length or an offset in a patient during a total hip arthroplasty (THA) procedure performed using a navigated surgical system, with an expandable trial femoral assembly. Certain methods include registering a pelvis of the patient to the navigated surgical system; and in various embodiments measuring a leg length or registering a femur to the navigated surgical system. An expandable trial femoral assembly is affixed to a prepared and broached femur of the patient; and the expandable trial femoral assembly is reduced into an acetabular prosthesis. A navigated driver may then be used to adjust an expansion extent of the expandable trial femoral assembly. The navigated surgical system may measure the leg length and the offset in the patient based on the movement of a reference element of the femur relative to a reference element of the pelvis.

The invention provides an acetabular prosthesis which comprises an acetabular cup, an acetabular prosthesis body, a first connecting piece, a second connecting piece and a third connecting piece, wherein a first mounting hole is formed in the outer wall of the acetabular cup; the connecting structure is arranged in the first mounting hole in a position adjustable mode, the connecting structure comprises a connecting stud, the connecting stud is provided with an extending position extending out of the first mounting hole and a retracting position retracting into the first mounting hole, and the axis of the connecting stud intersects with the axis of the acetabular cup; the driving structure is rotatably arranged on the acetabular cup, and when the driving structure rotates, the driving structure drives the connecting stud to rotate and enables the connecting stud to be switched between the extending position and the retracting position. According to the technical scheme, the problem that the implanting process of the acetabular prosthesis is tedious in the prior art is effectively solved.

The application relates to a hip joint prosthesis, which comprises an interposition acetabulum prosthesis and a femoral head reconstruction device. The interposition acetabulum prosthesis is connected with the acetabular fossa of the pelvis stably through an interposition acetabulum cup, a fixing screw and an interposition acetabulum liner, and the adaptability and stability are enhanced through multiple designs such as petal opening and damping parts; the femoral head reconstruction device comprises a joint friction surface prosthesis and a bone ingrowth support cage, and the reconstruction and stable support of the femoral head are realized. The application achieves the technical effects of improving the stability and durability of the hip joint prosthesis, reducing the postoperative discomfort of patients and promoting the growth of bone tissue.

The invention provides an acetabular prosthesis which comprises an acetabular cup, an acetabular prosthesis body and an acetabular prosthesis body, and a containing part communicated with the outer surface of the acetabular cup is arranged in the acetabular cup; the outward-extending fixing piece is movably arranged in the containing part and is provided with a fixing position extending out of the acetabular cup and an avoiding position located in the containing part, and an acute-angle included angle or a right-angle included angle is formed between the moving direction of the outward-extending fixing piece and the axis of the acetabular cup; and the operating part is arranged on the acetabular cup and is in driving fit with the overhanging fixing part, so that the overhanging fixing part is switched between the fixing position and the avoiding position. According to the technical scheme, the problem that the acetabular cup fixing effect is poor in the prior art is effectively solved.

Disclosed in the present disclosure are an acetabular prosthesis angle positioning device for total hip arthroplasty. The device includes a telescopic tripod, a spherical scale instrument, a first fixing member, a main operating rod, a connecting device and an auxiliary operating rod. The spherical scale instrument includes a transparent spherical housing and a connecting ball clamped in the transparent housing, scale marks are arranged on the transparent spherical housing, and mark points fitted to the scale marks are arranged on the connecting ball; the main operating rod is connected to the connecting ball; and the main operating rod is connected to the auxiliary operating rod through the connecting device, and the auxiliary operating rod is hollow.

A bionic acetabular prosthesis has a spherically cap-shaped cup body. The body is inwardly concave at the bottom to form a hollow cavity, and has on its outer wall surface, annular collars, each having a trapezoidal cross-section with a larger base portion and a smaller top portion. The collars are provided with circumferentially-spaced notches, having a recessed depth smaller than or equal to a raised height of the collars. Slopes of opposite side faces of the cross-sectionally trapezoidal collars on the cup body avoid the formation of defects in the surface of the hollow cavity, ensuring good quality of the resulting acetabular prosthesis. In addition, notches may be arbitrarily formed in the collars. These notches interact with bone cement to restrict circumferential rotation of the cup body. Gently sloped surfaces of adjacent collars join and define annular grooves, which contain more bone cement, stabilizing the cup body.

The invention discloses a method and system for regulating and controlling positioning of an acetabular prosthesis in an operation based on a preoperative inclination angle, and the method comprises the steps: converting a target RA and a target RI which are planned before the operation into a target OA according to a formula Tan (OA) = Tan (RA) / Cos (RI), and implanting the acetabular prosthesis according to the angle of the target OA, so that the error between the measured OA and the target OA is within + / -5 degrees; or after the acetabular prosthesis is implanted, actual OA and RI are measured, the actual OA and RI are converted into RA according to the formula Tan (RA) = Tan (OA) * Cos (RI), and the RA is compared with the target RA, so that the position of the acetabular prosthesis is regulated and controlled to ensure that the acetabular angle is in a safe area after operation; according to a target RA and a target RI which are determined before an operation, conversion is carried out according to a formula Tan (OA) = Tan (RA) / Cos (RI), and the position of the acetabular prosthesis is regulated and controlled by measuring an OA angle during the operation, so that the acetabular prosthesis is accurately implanted.

An acetabular cub system is configured to be secured to a pelvis and may include an acetabular cup and a plurality of bone fasteners. The acetabular cup may include a bone engaging surface and an articulating surface, as well as a plurality of lobed fastener apertures extending from a first opening at the articulating surface to a second opening at the bone engaging surface. The plurality of bone fasteners may be insertable through the lobed fastener apertures to secure the acetabular cup to the pelvis. Each of the plurality of lobed fastener apertures may include a central aperture configured to receive a first bone fastener of the plurality of bone fasteners and one or more aperture lobes intersecting with the central aperture configured to receive a second bone fastener of the plurality of bone fasteners. The central aperture may be larger than the one or more aperture lobes.

The application provides a hip joint prosthesis, which comprises: a hip joint cup, a first mounting hole is arranged on the outer wall of the hip joint cup; a connecting structure is adjustably arranged in the first mounting hole, the connecting structure comprises a connecting stud, the connecting stud has an extended position extending out of the first mounting hole and a retracted position retracted into the first mounting hole, and the axis of the connecting stud is arranged to intersect the axis of the hip joint cup; and a driving structure is rotatably arranged on the hip joint cup, the driving structure drives the connecting stud to rotate and enables the connecting stud to switch between the extended position and the retracted position when the driving structure rotates. The technical scheme of the application effectively solves the problem of complicated implantation process of the hip joint prosthesis in the related art.

The invention discloses a combined hip joint prosthesis, and relates to the field of artificial joints. According to the technical scheme, the femoral component prosthesis comprises a femoral component prosthesis and an acetabular prosthesis, a connecting shaft is fixed to the end of the femoral component prosthesis, a connecting cylinder is arranged at the end of the connecting shaft, a femoral head prosthesis is connected to the end of the connecting shaft through the connecting cylinder, the outer surface of the femoral head prosthesis is sleeved with the acetabular prosthesis, and an arc-shaped connecting piece is slidably connected to the outer surface of the acetabular prosthesis; and the acetabular prosthesis is connected with a limiting ring through an arc-shaped connecting piece. The femoral head prosthesis is connected with the bone through the connecting cylinder and the connecting shaft, the conical barrel structure is formed by the multiple plug blocks and the limiting base, the connecting shaft is prevented from falling off, connection can be completed only by inserting the connecting shaft in the assembling process, and installation is convenient; the caput femoris prosthesis and the acetabulum prosthesis are connected through the cooperation of the arc-shaped connecting piece and the limiting ring, the limiting ring can be limited through the arc-shaped connecting piece by rotating the limiting ring, and the limiting ring is prevented from falling off.

The invention is suitable for the technical field of medical instruments, and provides a universal joint screw for fixing an acetabular prosthesis and a using method thereof.The universal joint screw comprises a main body assembly and a connecting assembly, the main body assembly comprises a screw body and a self-tapping head, and the connecting assembly comprises a first fixing block, a first connecting base, a universal joint, a second connecting base and a second fixing block; the first fixing block and the second fixing block are respectively connected with the screw body and the self-tapping head; the first connecting seat and the second connecting seat are both connected with the universal joint; the universal joint is movably connected with the first connecting base and the second connecting base in a multi-angle rotating mode and used for adjusting the relative position of the screw body and the self-tapping head in the screw screwing-in process. The universal joint is constructed in the long acetabular screw, long-distance fixing of the long screw perpendicular to the acetabular prosthesis is achieved, the mechanical stability of the acetabular prosthesis is improved, the fixing failure risk is reduced, the reoperation probability is reduced, reliable fixing of the rebuilt acetabular prosthesis can be rapidly and accurately completed, the operation efficiency is improved, and postoperative rehabilitation of a patient is accelerated.

The utility model relates to the technical field of surgical auxiliary instruments, in particular to a novel positioning device for prosthesis implantation in hip replacement surgery, which comprises a telescopic support rod, an adjusting pad is connected to the end of the telescopic support rod, and rotating columns are connected to two sides of the adjusting pad; one side of the adjusting sleeve is provided with a movable hole for the telescopic supporting rod to move close to one end of the adjusting pad, the adjusting pad is arranged in the adjusting sleeve, and the two sides of the adjusting sleeve are provided with strip-shaped holes for the rotating column to move; any point can be selected as a fixing point only by exposing acetabulum edge bone, then the positioning device is installed, an acetabulum test mold with the minimum size is placed at the acetabulum bottom, after forward inclination and abduction angles are evaluated, the telescopic supporting rod is adjusted to be consistent with the acetabulum test mold rod at the moment in direction, and the telescopic supporting rod is firmly fixed through the screw plug. The positioning device is an effective aiming device in the operation, is simple, convenient and practical, can be removed after the acetabular prosthesis is placed, and can be disinfected for use or used in a disposable mode.

The invention discloses an acetabulum center polishing and positioning method and an acetabulum center positioning and guiding device. CT data and nuclear magnetic data are utilized to reconstruct a complete acetabulum three-dimensional model; positioning a true acetabular bottom; importing an acetabular prosthesis model, and adjusting the acetabular prosthesis model for bone matching; if the matching is successful, determining a front rake angle, an abduction angle, a model, an implantation position and a central axis of the acetabulum prosthesis, and determining a thickness A of the acetabulum needing to be ground; the guiding device is placed at a preset position in the acetabulum; after correct placement, the kirschner wire is drilled into a guide hole of the guide device until the kirschner wire is drilled into the acetabulum opposite-side cortical bone; taking down the guide device, measuring the residual length of the tail end of the kirschner wire as B, sleeving the acetabulum file into the kirschner wire, and operating the acetabulum file to push forwards along the kirschner wire for grinding until the length of the tail end of the kirschner wire is A + B; therefore, the optimal matched front inclination angle, abduction angle, acetabulum model and implantation position can be provided, positioning guidance is provided for acetabulum grinding, and the hip joint replacement difficulty is reduced.

The application provides a THA postoperative acetabular prosthesis angle evaluation method and system based on multi-modal data fusion and a computer readable storage medium. The THA postoperative acetabular prosthesis angle evaluation method based on multi-modal data fusion comprises the following steps: acquiring a double lower limb CT image of a patient before total hip arthroplasty; wherein the coverage range of the double lower limbs is from above the hip joint to below the knee joint; performing three-dimensional reconstruction on the double lower limb CT image to clearly display detailed anatomical information of the pelvis and the double lower limbs of the patient; using a biplane X-ray acquisition system to acquire an anteroposterior and lateral X-ray image of the double lower limbs of the patient in a weight-bearing position, and determining the positional relationship of the acetabular prosthesis and the related anatomical landmarks of the skeleton relative to the overall force line of the lower limbs in the weight-bearing state; fusing the preoperative CT data and the postoperative biplane X-ray data to form a fusion image in a three-dimensional space, and performing accurate measurement of the postoperative acetabular prosthesis anatomical anteversion angle, anatomical inclination angle, functional anteversion angle and functional inclination angle on the image.

The invention discloses an acetabulum form evaluation method and system under a continuous pelvic inclination posture, and belongs to the technical field of clinical evaluation. The method comprises the following steps: constructing a three-dimensional pelvis model and a three-dimensional femur model; establishing a pelvis anterior plane anatomy reference coordinate system; the double hip axes subjected to refined estimation are obtained; obtaining optimal acetabulum opening planes on the left side and the right side, and taking normal vectors of the optimal acetabulum opening planes on the left side and the right side as initial axes of pelvic acetabulum on the corresponding sides; constructing a rigid body motion model that the initial axis of the pelvis acetabulum continuously rotates around the double hip axes, and calculating changes of the acetabulum axis direction under different inclination postures of the pelvis and corresponding acetabulum front inclination angles and abduction angles; and establishing an acetabular abduction angle / front inclination angle curve under pelvis inclination, and completing acetabular form evaluation. According to the method, automatic calculation of the acetabulum space direction and accurate acetabulum shape evaluation are achieved, and a foundation is laid for finding the acetabulum prosthesis installation angle most suitable for a patient.

The invention provides a patch device for artificial total hip replacement, and belongs to the field of biomedicine and medical instruments. The patch bone surface grinding and filing positioning device comprises a patch and a patch bone surface grinding and filing positioning device, the matched patch is obtained according to the matched acetabular prosthesis and the bone defect degree, the matched acetabular prosthesis is supported through the patch, the stability of the matched acetabular prosthesis is improved, then the acetabular defect position is ground and filed according to the shape of the patch through the patch bone surface grinding and filing positioning device, and the stability of the acetabular prosthesis is improved. The adaptation degree of the patch and the defect part of the acetabulum is improved, the standardization and the process of the device are realized, and the cost of a patient is reduced.

Functional patient-specific acetabular component alignment is important in total hip arthroplasty. A method for acetabular component alignment by calculating pelvic tilt from an anteroposterior radiograph of the pelvis of a patient may be replicated intraoperatively for patient-specific alignment. A system for automated generation of the pelvic tilt from an anteroposterior radiograph presented improves the efficacy and accuracy of total hip arthroplasty.

Acetabular prosthesis (10) comprising an acetabular cup (12) having a through-opening configured to receive both an iliac stem (11) and a safety cap (13).

The embodiment of the present application provides a kind of children hip joint prosthesis dynamic anti-extraction system, it is related to the technical field of children orthopedics implant instrument.The anti-extraction system includes: dynamic anti-extraction component;Dynamic anti-extraction component includes: fixed part;Gear mechanism includes: gear and transmission rack;Two fixed parts are respectively arranged on the two sides of gear;Two fixed parts are connected by transmission rack and gear, gear is rotated by the driving of fixed part;Anti-extraction baffle is telescopic arc baffle;Two ends of anti-extraction baffle are respectively installed at the outer edge of acetabulum by fixed part, and anti-extraction baffle is used to block the half hip joint prosthesis ball head component from acetabulum.The embodiment of the present application provides a kind of children hip joint prosthesis dynamic anti-extraction system, by setting anti-extraction baffle at the outer edge of acetabulum, to prevent the half hip joint prosthesis ball head component from acetabulum by non-physiological displacement;Meanwhile, the dynamic growth fixing device formed by the cooperation of bilateral fixed part, reverse transmission tooth and ratchet mechanism realizes synchronous extension with children skeleton growth.

The invention relates to a hip replacement preoperative acetabular prosthesis positioning method based on a concentric circle principle, and the core of the method is that a coincidence point O of a femoral head center and an acetabular rotation center is determined based on imaging data before an operation, and a virtual concentric circle model is constructed by taking the point O as a circle center and an acetabular opening surface as a reference; the abduction angle of the acetabular prosthesis is preset to be 40 degrees, a straight line L passing through the rotation center O is drawn according to the angle, and the arc distance D between the point A and the straight line L on the spherical surface of the acetabular prosthesis is accurately calculated according to a formula by measuring the edge angle alpha of the acetabular center and the diameter R of the acetabular. The arc distance D is the arc distance from the acetabular outer upper edge bony mark point A to the acetabular prosthesis outer upper edge, which can be measured in the operation. Through preoperative accurate quantitative calculation, an objective and accurate navigation basis is provided for acetabulum filing and prosthesis placement in the operation, anatomical reconstruction of the hip joint rotation center is achieved, and the risk of complications such as postoperative dislocation and abrasion caused by the poor position of the prosthesis is remarkably reduced.

The application provides an angle measurement positioning device for hip replacement surgery, a pelvis positioning unit is fixedly arranged on a pelvis to be replaced with a hip joint, and is used for acquiring posture data of the pelvis; a prosthesis positioning unit is fixedly arranged on an acetabular prosthesis implant, and is used for acquiring posture data of an acetabular prosthesis carried by the acetabular prosthesis implant; a control unit is electrically connected with the pelvis positioning unit and the prosthesis positioning unit, respectively, and is used for calculating a relative angle between the pelvis and the acetabular prosthesis according to the received posture data of the pelvis and the posture data of the acetabular prosthesis, so as to determine a target angle of implanting the acetabular prosthesis. The positioning device can realize accurate target angle of implanting the acetabular prosthesis, assist a doctor to better determine the placement angle of the acetabular prosthesis, and is not affected by the body position change of a patient during surgery; the positioning device does not need to rely on imaging examination, is simple to use, reduces the influence of a learning curve of the doctor, has small product volume, low manufacturing cost, and can be widely used.

This invention discloses a method, device, and medium for acetabular prosthesis angle planning based on safety zone constraints. The method includes: acquiring pelvic image data of a patient in a first posture; constructing a three-dimensional model of the patient's pelvis based on the pelvic image data and obtaining anatomical landmarks, and establishing a pelvic coordinate system based on the anatomical landmarks; acquiring pelvic posture compensation amounts as the patient switches from the first posture to at least one functional posture; determining posture parameters based on the pelvic coordinate system; determining the mapping relationship between the functional anteversion angle and the pelvic posture based on the pelvic posture compensation amounts and posture parameters; determining orientation constraints based on the prosthesis orientation information in the functional posture; and determining the feasible range of posture parameters based on the mapping relationship and orientation constraints. This application uses a geometric constraint solution method to reverse-engineer the feasible range of posture parameters for the static implantation orientation of the acetabular prosthesis, assisting in the completion of personalized and dynamically functionally safe prosthesis angle planning.

The application provides a hip joint prosthesis, which comprises: a hip joint cup, a containing part being arranged in the hip joint cup and being in communication with the outer surface of the hip joint cup; an external fixing part, which is movably arranged in the containing part and has a fixed position extending out of the hip joint cup and a avoiding position in the containing part, and the moving direction of the external fixing part and the axis of the hip joint cup form an acute angle or a right angle; and an operating part, which is arranged on the hip joint cup and is in driving cooperation with the external fixing part to switch the external fixing part between the fixed position and the avoiding position. The technical scheme of the application effectively solves the problem of poor fixing effect of the hip joint cup in the related art.

The application discloses a kind of continuous pelvic tilt posture under acetabular form evaluation method and system, belong to clinical evaluation technical field.Method includes: constructing pelvic three-dimensional model and femur three-dimensional model;Establish pelvic front plane anatomical reference coordinate system;Obtain the double hip axis of refined estimation;Get left and right two optimal acetabular opening planes, take the normal vector of left and right two optimal acetabular opening planes as the initial axis of corresponding side pelvic acetabulum;Construct the rigid body motion model of pelvic acetabular initial axis around the continuous rotation of double hip axis, calculate the change of acetabular axis direction under different pelvic tilt postures and corresponding acetabular anteversion angle, abduction angle;Establish acetabular abduction angle / anteversion angle curve under pelvic tilt, complete acetabular form evaluation.The application realizes the automatic calculation of acetabular space direction and accurate acetabular form evaluation, and lays a foundation for finding the most suitable patient acetabular prosthesis installation angle.

A bionic acetabular prosthesis comprises a generally spherical crown-shaped cup (10), wherein the bottom of the cup (10) is recessed inwardly to form a cavity (11), a plurality of generally ring-shaped ridges (12) are provided on an outer wall surface of the cup (10), each of the ridges (12) has a cross section that is generally in the shape of a trapezoid having a wider base and a narrower top, notches (13) are provided on the ridge (12) at intervals in a circumferential direction of the ridge (12), and the recessed depth of each of the notches (13) is less than or equal to the raised height of the ridge (12). The slope of two inclined sides of the generally trapezoidal cross section of the ridge (12) on the cup (10) is adjusted according to the material of which the cup is manufactured, thereby preventing the formation of flaws on a surface of the cavity (11), and ensuring the production quality of the acetabular prosthesis. The notches (13) are arbitrarily arranged on the ridge (12) as desired, so as to facilitate cooperation with bone cement to limit the circumferential rotation of the cup (10). A wide-opening annular groove (16) is formed by inclined surfaces of two adjacent ridges (12) which are smoothly connected, and the annular groove can accommodate more bone cement during use, thereby improving the stability of the cup (10) in a height direction of the cup (10) in a mounted state.

This invention provides a combined hip joint revision filler structure, comprising: an iliac wing assembly, which includes an acetabular cup support and an iliac wing fixation portion integrally formed on the acetabular cup support; the outer side of the acetabular cup support is used to fit and provide support to the patient's acetabular cup, and the inner side of the iliac wing fixation portion is used to fit and fix to the patient's iliac wing; and a filler block, which is fixed to the iliac wing assembly and includes a fusion surface for fitting the patient's hip defect bone from below and a contact surface for fitting the inner side of the acetabular cup support. This invention improves the stability of the fixation structure by fitting and fixing the inner side of the iliac wing fixation portion to the patient's iliac wing, and also improves the convenience of subsequent positioning and screw placement. Simultaneously, the filler block also meets the need to fill hip defect bone, solving the problems of difficult positioning and screw placement of existing pre-made metal acetabular pads, and the inability to fill bone defects, which easily leads to acetabular prosthesis loosening.