21 results about "Artificial hip joints" patented technology

Systems and methods receive pre-operative, volume data for a patient's pelvis and a femur. A three-dimensional (3D) model is generated of the patient's pelvis and femur. A hologram of the patient's native hip is generated from the 3D model. The patient's pelvis is registered relative to a pelvic coordinate system. The hologram is displayed and the patient is aligned with the hologram. The 3D coordinates of a selected point on the femur is determined relative to the pelvic coordinate system. Following implantation of prosthetic hip components, the hologram of the patient's native hip is displayed again and the patient is aligned with the hologram. The 3D coordinates of the selected point on the patient's femur are again determined. One or more changes to leg length, offset, or Anterior-Posterior (AP) position are determined based on the two 3D coordinates determined for the selected point. The one or more changes to leg length, offset, or Anterior-Posterior (AP) position are displayed

The application discloses a kind of artificial hip joint fatigue test device, including frame, it is characterized in that: the bottom of the frame is provided with Z direction oil cylinder, the top of Z direction oil cylinder is connected with the bottom of simulated acetabulum seat, the middle part of frame is provided with middle support plate, the middle support plate is provided with guide sleeve, the simulated acetabulum seat is slidably connected between linear bearing and guide sleeve, the top of the simulated acetabulum seat is provided with lubricating liquid cup and simulated acetabulum, the simulated acetabulum is located inside lubricating liquid cup, the simulated acetabulum is connected with artificial femoral head spherical surface in artificial hip joint, the top of the frame is provided with top support plate, top support plate is provided with horizontal displacement mechanism, and the execution end of horizontal displacement mechanism is movably connected with the top of artificial femoral stem in artificial hip joint by universal joint.

The utility model relates to the technical field of artificial hip joint prostheses, in particular to a hip joint femoral stem hollow conical head. Comprising a cone head surface (1), a cone side surface (2), a cone inner cavity (3) and a powder cleaning channel (5) which are connected in sequence, the conical head face (1) is used for sealing the in-conical cavity (3), the conical side face (2) is matched with a ceramic ball head or a metal ball head, the conical side face (2) is provided with a plurality of small protrusions (4) so that the femoral stem conical head can be matched with the ceramic ball head or the metal ball head more tightly, and the in-conical cavity (3) is used for increasing elastic deformation of the conical head. The small bulges (4) generate plastic deformation when the ceramic ball head or the metal ball head is assembled with the conical head, so that the contact area between the ball head and the conical head is increased, and the friction force is increased; and the powder cleaning channel (5) is used for cleaning unmelted powder in the cavity in additive manufacturing.

An artificial hip joint prosthesis and a method for mounting the same are provided. The artificial hip joint prosthesis includes a spherical chamber and a ball head. An outer spherical surface of the ball head fits with an inner spherical surface of the spherical chamber to form a spherical hinge. An inner spherical surface of the spherical chamber has an opening in an elliptical shape or a similar shape with a long axis and a short axis, to allow insertion of the ball head. The long axis of the opening in the elliptical shape or the similar shape has a length A, and the short axis of the opening has a length B. The ball head is mounted inside the spherical chamber and has a diameter C, in which B<A≤C.

The program causes the computer to execute the following processes: acquiring a perspective image of a patient to be subjected to a process relating to the artificial hip joint; identifying an inner plate line in the pelvis of the patient in the acquired perspective image, the inner plate line representing a maximum cutting site when cutting the pelvis in order to configure an acetabular cup included in the artificial hip joint; identifying a bid line in the patient's pelvis, the bid line representing a minimum cutting site when cutting the pelvis in order to configure the acetabular cup; deriving the CE angle of the acetabular cup when the disposition of the acetabular cup is assumed in a state in which the pelvis of the patient is cut with a bone digging reamer for the treatment related to the artificial hip joint; displaying the identified inner plate line and the identified necessary line on the perspective image in an overlapping manner; and attaching the exported CE angle of the acetabular cup to the perspective image for displaying.

The utility model relates to the technical field of medical instruments, and discloses an artificial hip replacement surgery side position body position support which comprises a body position plate, an arc-shaped plate used for fixing is fixedly installed on one side of the body position plate, a fixing belt used for positioning is fixedly installed on one side of the arc-shaped plate, and a connecting plate used for fixing is fixedly installed on one side of the arc-shaped plate. A thigh supporting plate used for supporting is fixedly installed on one side of the connecting plate, and an elastic belt used for fixing is fixedly installed on one side of the thigh supporting plate. According to the artificial hip joint replacement surgery lateral position body position support, through cooperative arrangement of the connecting plate, the thigh supporting plate and the elastic belt, the body position plate and the thigh supporting plate can be fixedly connected through the connecting plate, meanwhile, the angle of the device can be adjusted according to needs so as to meet the use requirement, the thigh supporting plate can fixedly install the elastic belt, and the elastic belt is not prone to falling off. And the device has certain elasticity, so that the device is fixed more firmly, and the risk of an operation is reduced.

The invention relates to the technical field of artificial hip joint prostheses, in particular to an additive-manufactured hollow acetabular cup prosthesis and a manufacturing method thereof. The additive-manufactured hollow acetabular cup prosthesis comprises a plug pin, a cup body and a porous structure which are sequentially connected. The inner molded surface of the cup body comprises an inner end surface, an inner spherical surface, a conical surface, an anti-rotation lug mounting groove and a clamping groove, and the inner molded surface of the cup body is used for mounting the mortar lining; the conical surface of the cup body is used for mounting the ceramic lining, and the inner end surface, the inner spherical surface, the anti-rotation lug mounting groove and the clamping groove are not in contact with the ceramic lining; the porous structure is attached to the outer molded surface of the cup body, and the outer molded surface of the porous structure is hemispherical or semi-ellipsoidal and stops on a long axis; the porous structure and a cup body rotating shaft are short half shafts; the top end of the cup body is provided with a threaded hole used for installation in an operation, the end face of the cup body is provided with at least one powder discharging hole, and a blocking pin is installed after powder discharging. The inner spherical surface of the cup body is not provided with or is provided with at least one titanium nail hole for installing and implanting a titanium nail for initial fixation; and a communicated cavity is arranged between the end face and the outer molded surface.

The utility model relates to the technical field of medical instruments, and discloses a portable folding chair for an artificial hip replacement postoperative patient, which comprises a chair seat, a back cushion plate and a seat cushion plate are arranged on the chair seat, the included angle between the back cushion plate and the seat cushion plate is greater than 90 degrees, and a chest frame for restraining the upper body of the patient is connected onto the back cushion plate; leg clamps which can be folded and stored are arranged on the cushion plate; a foot stool used for restraining the feet of the patient is arranged at the bottom of the front portion of the chair seat, and two rubber bands are fixedly connected to the foot stool. The positions of the upper body, the two legs and the soles of the patient are limited and restrained in sequence from top to bottom through the angle structure of the chair seat, the chest frame arranged on the back cushion plate and used for restraining the upper body of the patient, the leg clamps arranged on the seat cushion plate and used for limiting and unfolding the two legs, and the foot stool matched with the two legs for restraining the lower limbs, so that the posture of the patient is kept correct, and rehabilitation is facilitated; meanwhile, the leg clamp can be folded and stored, so that the leg clamp can be normally used by other people or can be normally used by a patient after rehabilitation, and the use convenience is improved.

The utility model discloses a tool for measurement in artificial hip joint replacement. The tool comprises an eccentric distance measuring assembly and a height measuring assembly arranged on the eccentric distance measuring assembly. The eccentric distance measuring assembly is in a T shape and comprises a transverse section and a vertical section arranged at one end of the transverse section in the length direction, the transverse section is provided with a first scale groove, and the bottom end of the vertical section is provided with an arc-shaped face tangent to the bottom face of the transverse section and matched with the arc face of the top end of the thighbone greater trochanter. The device can adapt to different conditions of different patients and improve the measurement accuracy during prosthesis mold testing in an operation, meanwhile, due to the determined right-angle relation among the transverse section, the vertical section and the measurement ruler, an operator can be prevented from finding a vertical line in the operation, the height of a rotation center can be directly measured, and the measurement accuracy is improved. The purpose of noninvasive measurement in an operation is achieved through arc-shaped surface positioning.

The acetabular cup removal device for artificial hip joints according to an embodiment of the present invention includes a main shaft and a cutter unit that cuts the acetabular portion while rotating around the main shaft. The cutter unit includes a cutter tilt unit that can be tilted along the acetabular portion around a virtual tilt axis, a cutter mounting unit that is slidably coupled to the cutter tilt unit in a direction approaching or moving away from the virtual tilt axis, and a cutter detachably mounted on the cutter mounting unit. The cutter tilt unit includes a first through hole penetrating along the virtual tilt axis, a connecting bar having both ends fixed to the cutter mounting unit, and a leaf spring fixed to both ends of the connecting bar and having a central portion between both ends.

This program causes a computer to execute processing for: acquiring a fluoroscopic image of a patient to whom a treatment related to an artificial hip joint including a cup is to be applied; and inputting the acquired fluoroscopic image to a trained model that has been trained to output, when a fluoroscopic image is inputted thereto, positional information on the anterior wall of the acetabulum and the posterior wall of the acetabulum of the patient, thereby deriving the positional information on the anterior wall of the acetabulum and the posterior wall of the acetabulum of the patient.

An inner plate line indicating a maximum shaving point when shaving a pelvis to arrange a cup included in an artificial hip joint is displayed in a superimposed manner.SOLUTION: Acquiring, by a computer, a fluoroscopic image of a patient to be subjected to a procedure related to an artificial hip joint, recognizing, in a pelvis of the patient in the acquired fluoroscopic image, an inner plate line indicating a maximum cutting point when cutting the pelvis to arrange a cup included in the artificial hip joint, and recognizing, in the pelvis of the patient, an indispensable line indicating a minimum cutting point when cutting the pelvis to arrange the cup; And deriving a cup CE angle when the cup is assumed to be placed in a state in which the pelvis of the patient has been shaved by the bone drilling reamer used in the treatment related to the artificial hip joint, superimposing and displaying the recognized medial plate line and the requisite line on the fluoroscopic image, and displaying the derived cup CE angle in association with the fluoroscopic image.SELECTED DRAWING: Figure 1

This invention belongs to the field of friction-reducing and antibacterial coating technology, and discloses a friction-reducing and antibacterial titanium alloy coating, its preparation method, and its application. The method includes the following steps: preparing an interlaced elliptical microtexture on the surface of a titanium alloy; sequentially performing N-ion implantation and Cu-ion implantation; and then chemically plating copper onto the titanium alloy surface after ion implantation to obtain the friction-reducing and antibacterial titanium alloy coating. The textured surface prepared by this invention, combined with the metallic copper layer, results in better protein adhesion to the sample surface, significantly improved lubrication and antibacterial properties. The friction coefficient is 0.362-0.483 in the atmosphere, 0.222-0.326 in simulated body fluids, and 0.196-0.236 in serum, with an antibacterial rate of 98-100%. This invention features high preparation precision, regular shape, adjustable coating thickness, and a unique surface texture that can support at least one year of human activity, making it applicable to surgical implants such as artificial hip joints.

This invention belongs to the field of disassembly jigs for artificial hip joint components. It discloses a femoral head prosthesis disassembly jig, including a hollow handle and a slidable slide rod inside the handle. The slide rod passes through the handle and has a first locking element and a first locking slot on the first locking element. The handle has a second locking element and a second locking slot on the second locking element. The first locking slot is located between the second locking slot and the slide rod and is directly opposite the second locking slot along the axial direction of the slide rod. The handle has a wrench, which is hinged to the handle and forms a first hinge fulcrum. A connecting rod is hinged to the wrench, and the connecting rod and the wrench form a second hinge fulcrum located between the middle of the wrench and the first hinge fulcrum. The connecting rod passes through the handle and is hinged to the slide rod. This solution can ensure that the pulling force is consistent with the direction of the neck axis of the femoral stem during use and amplify the pulling force on the jig to reduce physical exertion and reduce the difficulty of removal. At the same time, it avoids the operator pulling the jig outward and eliminates operational safety hazards.

An artificial hip joint prosthesis and a method for mounting the same are provided. The artificial hip joint prosthesis includes a spherical chamber and a ball head. An outer spherical surface of the ball head fits with an inner spherical surface of the spherical chamber to form a spherical hinge. An inner spherical surface of the spherical chamber has an opening in an elliptical shape or a similar shape with a long axis and a short axis, to allow insertion of the ball head. The long axis of the opening in the elliptical shape or the similar shape has a length A, and the short axis of the opening has a length B. The ball head is mounted inside the spherical chamber and has a diameter C, in which B < A ≤ C.

The application discloses an improved step counting method based on hip gait stress data, and is characterized in that stress step range and stress step number of the improved step counting method are preset based on hip gait stress data characteristics; stress steps crossed by gait stress data are sequentially judged according to a counting principle of the improved step counting method, and the number of the crossed stress steps is counted; and the crossed stress steps are combined into a stress cycle according to a stress cycle determination method of the improved step counting method, so that the amplitude and the average of the stress cycle are obtained. The method overcomes the problems of poor real-time performance and loss of time sequence information in the data counting process of the traditional fatigue counting method, effectively saves the time sequence information of femoral structure gait stress, and improves the accuracy of the artificial hip joint structure fatigue life analysis result.

A new type of artificial sitting, iliofemoral ligament and matching anti-dislocation total hip joint prosthesis, including artificial ligament, acetabular cup, acetabular liner and artificial femoral head, the acetabular liner is sleeved with acetabular cup outside, the acetabular liner is a semispherical shape with a plane surface, the center of the plane surface is provided with an inwardly concave joint cavity, the artificial femoral head is inserted into the joint cavity with interference, constituting a movable structure, a plurality of outward ligament fixing holes are arranged on the periphery of the plane surface of the acetabular cup, a nail channel is arranged on the femoral stem of the artificial femoral head, the ligament sleeve ring of the artificial ligament is fixed in the ligament fixing hole through the fixing device, the tail line of the artificial ligament passes through the nail channel on the femoral stem and is fixed on the femoral stem through the locking nail, constituting an anti-dislocation structure; the present application has the advantages of simple structure, close to human physiological structure, low production cost, easy production and manufacturing, can prevent dislocation, solves the pain caused by prosthesis dislocation to patients and doctors, and has significant social and economic benefits.

An implantable medical device for implantation in a hip joint of a human patient is provided. The medical device comprises: at least one artificial hip joint surface adapted to replace at least the surface of at least one of the caput femur and acetabulum. At least one artificial hip joint surface comprises: a positioning hole with at least one opening in said at least one artificial hip joint surface. The hole is adapted to be placed and dimensioned such that the medical device is adapted to be fitted using a positioning shaft and at least partly surround the shaft, for positioning the at least one artificial hip joint surface in a desired position in the hip joint. The hole is adapted to be fitted using the positioning shaft, when the shaft is stabilized and placed in at least one of the femoral bone and the pelvic bone for positioning said medical device inside the hip joint.

The acetabular cup removal device for artificial hip joints according to an embodiment of the present invention comprises a main shaft and a cutter section that cuts the acetabular region while being rotated by the main shaft. The cutter section includes a cutter tilting unit capable of tilting along the acetabular region around an imaginary tilting axis, a cutter mounting unit coupled to the cutter tilting unit in a manner that allows relative sliding toward or away from the imaginary tilting axis, and a cutter detachably mounted on the cutter mounting unit. The cutter tilting unit comprises a first through-hole penetrating along the imaginary tilting axis, a connecting bar fixed at both ends to the cutter mounting unit, and a leaf spring fixed at both ends to the connecting bar with a central portion between the two ends.

The invention discloses an anti-dislocation artificial hip joint prosthesis system and a use method thereof, and belongs to the technical field of medical equipment. In the anti-dislocation artificial hip joint prosthesis system, a first magnet module is fixedly arranged on the inner side wall of an acetabular cup; the acetabular lining is fixed in the acetabular cup, and the first magnet module is located between the acetabular lining and the acetabular cup; the femoral head is fixedly connected with the front end of the femoral stem; a second magnet module is fixedly arranged in the femoral neck portion of the femoral stem, the femoral head is assembled into the acetabulum lining, and the first magnet module and the second magnet module attract each other. The first magnet module and the second magnet module are additionally arranged between the acetabular lining and the acetabular cup and in the femoral neck of the femoral stem respectively, and on the premise that the friction interface of the acetabular cup and the femoral head is not affected, the friction force between the acetabular cup and the femoral head is greatly improved based on the attraction effect between the first magnet module and the second magnet module. And joint dislocation complications easily caused by the acetabular cup and the femoral head under the traditional mechanical coupling effect are greatly reduced.