85 results about "Femoral stem prosthesis" patented technology

The invention relates to an artificial hip joint bone fusion femoral stem. The femoral stem comprises a head part, a neck part and a stem body, wherein the whole or partial stem body is formed by three-dimensional mesh structure, all mesh units are mutually communicated, holes are arranged in the proper places of the stem body and used to be filled with autograft or allograft crushed bone particles; and after the femoral stem is implanted through the surgical operation, the external bone tissue permeates and grows in the three-dimensional mesh and grows together with the crushed bone particles filled in the holes of the stem body, thus reaching the aim of effectively preventing the loose between the artificial hip joint bone fusion femoral stem prosthesis and the sclerotin for long time.

The invention relates to the field of medical apparatus and instruments, in particular to a non-metal ball hip joint prosthesis.The non-metal ball hip joint prosthesis comprises an acetabulum cup prosthesis body, a non-metal femoral head prosthesis body and a femoral stem prosthesis body.According to the non-metal ball hip joint prosthesis, an original acetabulum cup and liner are changed into a metal cup, and meanwhile a traditional metal or ceramic ball is changed into a high-crosslinking polyethylene ball with a metal core.On the premise that compatibility of the original metal-polyethylene joint surface is maintained, the thickness of the acetabulum cup is greatly decreased, and the large-diameter ball can be used when the small-diameter joint cup is available.Connection among components is reduced, meanwhile, the wear probabilit is greatly lowered, and the defects that a traditional complete hip joint prosthesis is small in movement angle, prone to dislocation and high in acetabulum side bone removal amount are overcome.

The invention discloses a total hip replacement preoperative planning method and device based on deep learning and X rays. The method comprises the steps of obtaining an X-ray image of the hip joint,wherein the X-ray image of the hip joint comprises an image of a reference object, and the reference object is a reference object with the known size; restoring the size of the X-ray image of the hipjoint according to the image size of the reference object and the proportion of the actual size of the reference object; identifying the restored X-ray image of the hip joint based on a deep learningmodel, and determining a leg length difference, an acetabular cup position and a specification model of a femoral stem prosthesis; and determining the position of an osteotomy line according to a rotation center of the femoral stem prosthesis and a rotation center of the acetabular cup determined in the X-ray image identifying process of the hip joint. The invention aims to provide a more convenient and accurate preoperative planning mode for providing better preoperative support for a total hip replacement surgery.

The invention discloses a 3D-printing individualized femoral neck cut-bone guide plate. The cut-bone guide plate includes a fixation part, an intertrochanteric crest fitting part and a cutting guide surface, wherein the fixation part is provided with a Kirschner pin hole and suitable for fixing the cut-bone guide plate on the intertrochanteric crest of the femur through a Kirschner pin, the intertrochanteric crest fitting part is located on the lower portion of the fixation part, the lower surface of the intertrochanteric crest fitting part is suitable for fitting the surface of the intertrochanteric crest of the femur, the front side face of the fixation part vertically and downwards extends to form the cutting guide surface that is suitable for fitting an osteotome, so that it is convenient for the osteotome to cut the femur downwards along the cutting guide surface. When applied to an artificial hip replacement operation, the cut-bone guide plate can improve the accuracy of the osteotomy operation, accurately controls the height and direction of osteotomy, thus improving the accuracy of the placement position of a femoral stem prosthesis, and is more conducive to control over the length of both lower extremities, and thus the effect of the artificial joint replacement operation is improved.

The invention relates to a human body personalized hip joint femoral stem prosthesis adopting lightweight design and a manufacturing method thereof, and belongs to the field of medical instruments. The human body personalized hip joint femoral stem prosthesis comprises a handle neck, a handle body, a vertebral body and a vertebral tip, wherein the upper part of the prosthesis is triangular, and the inner side angle is 90-120 degrees; the handle body adopts a hexagonal honeycomb structure unit for lightweight design; the handle body and the vertebral body can also be subjected to lightweight design at the same time, the lightweight design can adopt irregular opening or closing structure design or 3D lattice structure design, and the structural unit is preferably a diamond unit, a rhombic dodecahedron unit or a truncated cube unit; and the vertebral tip adopts a solid structure design. Through extraction of personalized features of the solid model and forward design with light weight asguidance, light-weight design is achieved while personalized customization is achieved, the weight of the hip joint femoral stem prosthesis can be reduced on the premise that the mechanical property is met, maximization of the material utilization rate is achieved, and meanwhile, a large amount of space is provided for bone regeneration and bone ingrowth, and the stability is improved.

The invention discloses a personalized femoral stem prosthesis easy to remove and renovate and a manufacturing method thereof. The prosthesis consists of a personalized NiTi alloy porous biological femoral stem casing and a personalized femoral stem body. In order to solve the problem that traditional bone fixed with cement is not easy to renovate, the prosthesis utilizes a biological porous femoral stem casing and is characterized in that the stem casing is matched with a medullary cavity structure, but is slightly smaller than the medullary cavity structure. The stem casing is formed by using NiTi alloy with memory effect through 3D printing method and subjected to a later memory training; the stem casing is a naturally expanded porous structure in the form; and according to the stress analysis, the porosities in the outer side and the inside of the femur is different to a certain extent; the phase-change temperature point of the memory effect of the stem casing is 10-20 DEG C lowerthan the body temperature. The stem casing is in a contracted state when the temperature is lower than the phase-change temperature point, and the stem casing is in an expanded state when the temperature is higher than the phase-change temperature point; the prosthesis has the advantages of simple structure design, high compatibility with the bone marrow cavity structure, good biocompatibility andthe like, and can prevent the femoral stem prosthesis from sinking, loosening or twisting and the like.

The invention relates to the field of medical devices and discloses a femoral stem prosthesis. The femoral stem prosthesis comprises a femoral neck and a flat femoral stem connected in turn, the femoral stem comprising a proximal femur segment connected to the femoral neck and a distal femur segment connected to the proximal femur segment, the proximal femur segment comprising a first medial surface close to the medial side of the human femur and a first lateral surface opposite to the first medial surface. The first inner side surface is configured as an arc-shaped surface curved toward the first outer side surface, the arc-shaped surface being formed with a plurality of first pressure steps arranged in sequence along the length direction of the arc-shaped surface. The femoral stem prosthesis of the invention is more stable in fixation with the human femur, can effectively prolong the service life of the femoral stem prosthesis in the human body and alleviate the pain of the patient.

A self-adaptive later-period stable type femoral stem prosthesis comprises a femoral stem prosthesis near-end part and a femoral stem prosthesis far-end part, wherein the femoral stem prosthesis near-end part is a solid body; the femoral stem prosthesis far-end part is of a controllable porous structure; the transition area of the femoral stem prosthesis near-end part and the femoral stem prosthesis far-end part is a boundary part; the controllable porous structure is constructed through porous subunits in an array mode; the porosities of the porous subunits at different positions of the femoral stem prosthesis far-end part are different; and modeling of the femoral stem prosthesis far-end porous part is achieved by arraying the porous subunits. The femoral stem prosthesis can reduce the femoral stem far-end elastic modulus, can achieve self-adaptive deformation according to the loads and surrounding bone morphology when being planted, improves the contact degree of the prosthesis near end and surrounding bone, promotes transferring of the loads to the near-end femur, avoids near-end bone loss caused by stress shielding, and reduces risks of near-end looseness and sinking.

The invention discloses a proximal femoral medullary cavity image data processing method and device, equipment and a storage medium. The method comprises the following steps: inputting a to-be-segmented two-dimensional CT medical image into an image segmentation network model obtained by pre-training to obtain a body surface projection image and an X-ray projection image of a thighbone position area; based on the body surface projection image of the femur position area, determining position coordinates of a femur lesser trochanter, and according to the position coordinates of the femur lesser trochanter and the X-ray projection image of the femur cortex area, determining the femoral metaphysis width and the femoral marrow cavity isthmus diameter of the femur position area; and calculating a femoral medullary cavity flicker index according to the diameter ratio so as to determine the type of the femoral medullary cavity form. Accuracy of the femoral metaphysis width and the femoral isthmus diameter is improved, so that the calculation accuracy of the femoral marrow cavity flicker index is improved, and an operator can be well helped to carry out pre-operation planning, such as selection of a femoral stem prosthesis in a joint replacement operation.

The invention relates to navigation equipment for a femoral medullary cavity cutting operation by a femoral myelocavity file, comprising an acquisition unit (1), a central control unit (2), a display unit (3), a button keyboard (4), a positioning board (5) and a probe (6), wherein the central control unit (2) is respectively connected with the acquisition unit (3), the display unit (3) and the button keyboard (4); the central control unit (2) controls the acquisition unit (1) to sample point position information and work out a cutting guide passage; three sampling points (501, 502, 503) are arranged on the positioning board (5) and form three vertices of a right triangle; two sampling points (1201, 1202) are arranged on the center line of the back end (12) of the probe (6); and two sampling points (1501, 1502) are arranged on the center line of a guide rod (15) of a driver-extractor of the femoral myelocavity file. The equipment can determine the relative position relation between thecenter line of a femoral medullary cavity and the center line of a femoral myelocavity file cutting guide passage, thereby improving the success rate in implantation of femoral stem prosthesis once.

The invention relates to a femoral stem prosthesis and a mounting method thereof. The femoral stem prosthesis can be mounted at the near end of a femoral medullary cavity, and comprises a femoral stem body, a pushing assembly and an arc-shaped shell; the femoral stem body is provided with a mounting hole; the pushing assembly is movably arranged in the mounting hole; the arc-shaped shell is located on the inner side face of the femoral stem body and arranged at the output end of the pushing assembly; and the pushing assembly can drive the arc-shaped shell to move so as to adjust the relative position and/or distance between the arc-shaped shell and the inner side face of the femoral stem body. The pushing assembly drives the arc-shaped shell to move, so that the arc-shaped shell can be in fit press fit with the inner wall of the femoral marrow cavity, the femoral stem prosthesis can be better matched with the femoral marrow cavity, and the service life of the prosthesis is prolonged.

The invention relates to the field of metal material surface treatment, in particular to an electrolyte plasma polishing method for a titanium alloy femoral stem prosthesis. The method comprises the following steps that a polishing solution containing ammonium fluoride and potassium fluoride is prepared; the polishing solution is heated in a constant-temperature water bath, and the temperature is kept at 70-90 DEG C; a fixture clamping a titanium alloy femoral stem prosthesis workpiece is connected with an anode and arranged above a polishing pool, and a conductive material is connected with a cathode; 300-500-V direct-current high voltage is applied between the cathode and the anode, the workpiece is lowered at the speed of 0.1-20 cm/s till the workpiece is completely immersed in the position 1-20 cm below the liquid level of the polishing solution, and the surface current density of the workpiece is kept at 0.12-0.6 A/cm<2>; and a stable gas layer completely wrapping the workpiece is formed on the surface of the workpiece, the gas layer is subjected to disruptive discharge to generate plasma, and the workpiece is polished for 1-30 min.

The invention relates to the field of femoral stem prosthesis installation, in particular to an anti-loosening femoral stem prosthesis. The anti-loosening femoral stem prosthesis comprises a femoral stem body, a femoral neck integrally connected to the femoral stem body, a movable part movably arranged in the femoral stem body and capable of extending outwards from the side face of the femoral stem body under external force, and an inserting piece which is inserted into the femoral stem body from the end close to the femoral neck; and when the inserting piece is inserted into the femoral stembody, one end of the movable part abuts against the inserting piece, and the other end of the movable part extends out of the femoral stem body. The anti-loosening femoral stem prosthesis has the advantages that the stability of the femoral stem prosthesis and a femoral medullary cavity after installation is improved, the possibility of loosening between the femoral stem prosthesis and the femoralmedullary cavity is reduced, and the service life and and the use life are prolonged.

The invention discloses a biotype artificial hip joint femoral component comprising a prosthesis femur neck, a neck and a component body comprising a fixed end and an isolated end; the isolated end comprises a periosteum carrier steel plate and a periosteum isolation steel plate; the periosteum carrier steel plate is arranged in one body with the fixed end; the biotype artificial hip joint femoral component also comprises an inner support device strutting the periosteum isolation steel plate towards the inner side of the femoral shaft and fixing the periosteum isolation steel plate on a medullary cavity cortical bone. The biotype artificial hip joint femoral component improves the structure of the femoral component, so the far end of the component body can be tightly pressed with the femoral shaft medullary cavity cortical bone, and the prosthesis can be stabilized and a gravity transmission mode can be improved so as to be close to natural stress and strain modes, thereby preventing femoral component prosthesis from loosening and surrounding bones from being broken; the biotype artificial hip joint femoral component can be made into a normal type and a prolonged type respectively used for normal replacement and revision.

The invention discloses a prosthesis registering device which is used for registering and entering all types of hip joint prostheses in a surgical navigation system. The prosthesis registering device comprises a base and a femoral stem prosthesis holder or a mortar cup prosthesis holder matched with the base, wherein the base comprises a rear seat for containing a femoral stem prosthesis, a curved arm part for containing a femoral head prosthesis and a femoral neck prosthesis, and a clamping part which is connected between the rear seat and the curved arm part and is used for fixedly clamping the femoral stem prosthesis; and at least three optical reflection spheres which are not positioned on the same straight line are respectively arranged on the femoral stem prosthesis holder, the mortar cup prosthesis holder and the base. The invention can enable all types of hip joint prostheses to be entered and registered into a computer-aided navigation system in real time, and has wide application range, simple structure and simple and convenient operation.

The invention provides a femoral stem prosthesis electrolytic machining cathode comprising cathode bottom plates and cathode forming main bodies, the end face of the end, away from the corresponding cathode bottom plate, of each cathode forming main body is a machining end face, and contour through holes penetrating through the corresponding cathode forming main body and the corresponding cathode bottom plate are formed in the edge position of each machining end face. An inner mold cavity adjacent to the corresponding contour through holes is further formed in each machining end face, and a handle part through hole is formed in the position, used for forming a femoral stem prosthesis handle part, of each inner mold cavity. The invention further provides a femoral stem prosthesis electrolytic machining device comprising the femoral stem prosthesis electrolytic machining cathode. The technical problems that an existing manufacturing method for machining the femoral stem prosthesis is low in machining precision and efficiency and high in machining cost are solved. The femoral stem prosthesis electrolytic machining cathode can be applied to an electrolytic machining method to serve as the electrolytic cathode, the structure is simple, and cutting of the contour of the femoral stem prosthesis and electrolytic forming of a complex profile in electrolytic machining can be completed at a time.