41 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.

The invention relates to a hip joint prosthesis. The hip joint prosthesis comprises an interstitial acetabular prosthesis and a femoral head reconstruction device. The interstitial acetabular prosthesis is stably connected with a pelvic acetabular fossa through the interstitial acetabular cup, the fixing screw and the interstitial acetabular lining, and adaptability and stability are enhanced through multiple designs such as petal openings and damping parts; the femoral head reconstruction device comprises a joint friction surface prosthesis and a bone ingrowth supporting cage frame, and reconstruction and stable supporting of the femoral head are achieved. According to the hip joint prosthesis, the technical effects of improving the stability and durability of the hip joint prosthesis, reducing postoperative discomfort of a patient and promoting bone tissue growth are achieved.

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 belongs to the technical field of medical equipment, and discloses a non-image hip replacement navigation system and method based on transverse ligament positioning, and the system comprises a navigation positioning module, a human body horizontal plane and central axis positioning module, a transverse ligament spatial position positioning module and an acetabulum reconstruction module; the navigation positioning module is used for positioning the pose of the surgical instrument in real time; the human body horizontal plane and central axis positioning module is used for calculating an abduction angle and a front inclination angle; the transverse ligament spatial position positioning module is used for planning the shape and position of the acetabular prosthesis; and the acetabulum reconstruction module is used for implanting a prosthesis according to an intraoperative plan. According to the method, the position of the prosthesis is planned by positioning the acetabular transverse ligament, accurate intraoperative guidance is provided for acetabular grinding and prosthesis placement of a doctor, and the problems that an existing navigation system highly depends on preoperative images and intraoperative registration, so that hip replacement is complex in operation, low in efficiency and the like are solved.

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.

The present invention proposes a visual acetabular prosthesis implantation device. By setting a camera, the surgeon can understand the implantation of the acetabular cup in real time through the lens during the operation, and obtain a clear and intuitive understanding of the implantation position of the acetabular cup, thereby reducing the difficulty of the operation and accurately grasping the implantation position of the acetabular cup, thereby reducing the probability of the acetabular cup implantation deviation. By setting an optical fiber, the optical fiber provides supplementary light for the camera in real time to ensure a clear field of view. By setting a physiological saline flushing pipe and a negative pressure suction pipe, the blood and tissue debris around the camera can be cleaned in time, and the negative pressure suction pipe can timely suck out the discharged physiological saline and some debris from between the acetabular cup and the camera; since the two are located on opposite sides of the camera, a "water curtain" can be formed in front of the camera, which is convenient for real-time cleaning of impurities that interfere with the camera, thereby ensuring the clarity of the video image.

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 invention discloses a measuring tool and a measuring method for measuring an anteversion angle of an acetabular prosthesis, and relates to the technical field of clinical medicines.The measuring tool comprises a bottom plate, a bottom plate acetabular aiming pattern and an intersecting edge curve, the acetabular aiming pattern comprises a semicircle and an isosceles triangle, the isosceles triangle and the semicircle share a bottom edge, and the intersecting edge curve is arranged on the bottom plate; the two waists of the isosceles triangle and the arc of the semicircle are located on the same side of the bottom edge, and the intersecting edge curve is located on the other side of the bottom edge. When the anteversion angle of the acetabular prosthesis is measured on the hip joint normal position line sheet, the bottom edge is aligned with the long axis of the acetabular ellipse, the intersecting edge curve and the unshielded part of the acetabular ellipse intersect at one point, the point and the circle center of the semicircle are connected to form a straight line, and the included angle formed by the straight line and the bottom edge of the semicircle is the imaging anteversion angle of the acetabular prosthesis. The method has the advantages that estimation, calculation and drawing on an X-ray film are not needed, the convenience and accuracy of ACA measurement can be improved, and THA operation image evaluation is improved.

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 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 double lower limb CT images of a patient before total hip replacement; wherein the coverage range of the two lower limbs is from the upper part of the hip joint to the lower part of the knee joint; performing three-dimensional reconstruction on the CT images of the two lower limbs to clearly display detailed anatomical information of the pelvis and the two lower limbs of the patient; a biplane X-ray acquisition system is used for acquiring normal position and lateral position X-ray images of two lower limbs of a load-bearing position of a patient, and the position relation of an acetabular prosthesis and a skeleton related anatomical marker relative to the overall force line of the lower limbs in the load-bearing state is determined; the preoperative CT data and the postoperative biplane X-ray data are fused to form a fused image in a three-dimensional space, and the postoperative acetabular prosthesis anatomical front inclination angle, anatomical inclination angle, functional front inclination angle and functional inclination angle are accurately measured on the image.

The utility model belongs to the technical field of medical instruments, and particularly discloses an acetabular prosthesis which comprises an acetabular cup installed in an acetabular fossa. The acetabular cup and the filling block are connected in an embedded and clamped mode through the anti-rotation structure, and the acetabular cup and the filling block are fixed together through the first fixing nail. And the fixed wing is connected with the filling block and is fixed on the ilium wing. By means of the anti-rotation structure, when a patient implanted with the acetabular prosthesis moves and dislocation and slippage occur between the filling block and the acetabular cup, the first fixing nail cannot slightly move under the action of shearing force, the shearing force is borne by the anti-rotation structure, and the service life of the acetabular prosthesis is prolonged. According to the acetabular prosthesis, the first bone grafting groove and the supporting table are arranged on the filling block at intervals, the second bone grafting groove is formed in the acetabular cup, the weight of the acetabular prosthesis is reduced, autogenous bones or allogeneic bones of a patient can be implanted into the first bone grafting groove and the second bone grafting groove, the acetabular prosthesis is effectively prevented from loosening for a long time after being implanted, and the survival rate of the acetabular prosthesis is increased.

The present invention relates to a hip joint prosthesis and an acetabular liner. The acetabular liner includes an acetabular cup and at least two acetabular liners. The surface tapers of different acetabular liners are different, and each acetabular liner is provided with an articular surface for cooperating with the femoral head, and the central positions of the articular surfaces of different acetabular liners are different. The acetabular cup is provided with a receiving cavity for accommodating any one of the acetabular liners, and at least two dividing areas with different tapers are formed on the cavity wall of the receiving cavity, and a dividing area with one taper matches an acetabular liner with a specific surface taper. The above acetabular prosthesis has high versatility and can be suitable for patients with different eccentric distances.

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.

Prostheses, acetabular devices, and methods of use are disclosed. In some embodiments, an acetabular device includes an acetabular cup and an acetabular cage disposed within an interior of the acetabular cup. The acetabular cage can include a central portion including a first segment and a second segment rotatably coupled together and a first flange extending from the first segment and a second flange extending from the second segment. The acetabular prosthesis can also include a fastener extending through each of the acetabular cup and the central portion of the acetabular cage.

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 present invention provides an acetabular prosthesis, which includes: an acetabular cup, the inner side of the acetabular cup having a mounting groove; a liner, the liner being disposed in the mounting groove in a position-adjustable manner in a direction perpendicular to the inner and outer direction of the acetabular cup, there being an adjustment gap between the outer side wall of the liner and the groove wall of the mounting groove; a filling member, filled in the adjustment gap and adapted to the size of the adjustment gap to limit the movement of the liner relative to the acetabular cup. Through the technical solution provided by the present application, the problems in the related art that the acetabular cup is not easily installed in place and the rotation center of the hip joint is not easily reset can be solved.

The present invention relates to a three-motion acetabular prosthetic implant, comprising a main kinematic pair, a first kinematic pair, a second kinematic pair and a third kinematic pair that are meshed in sequence, wherein the main kinematic pair is fixed in the acetabulum, and the third kinematic pair is coupled with the femoral stem head to realize the freedom of the femur to move in the anterior-posterior, rotational and lateral directions relative to the acetabulum. Compared with the prior art, the three-motion acetabular prosthetic implant replicates the natural anatomical structure of the hip joint, and they form a ball-and-socket joint with the same three degrees of freedom as the natural hip joint, achieving anterior-posterior, rotational and lateral movements through the movement of each kinematic pair. The present invention realizes a large range of motion of the three-motion acetabular prosthetic implant by cooperating with four parts. The three-motion acetabular prosthetic implant provided by the present invention includes but is not limited to being used for replacing a patient's hip joint.

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).