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85 results about "Femoral stem prosthesis" patented technology

Bimetal acetabular component construct for hip joint prosthesis

InactiveUS20050102034A1Superior bone-engaging faceSuperior polyethylene-engaging faceJoint implantsTissue regenerationAcetabular componentMaterials science
This invention provides a prosthetic acetabular component that comprises two constructs, one being a metal base construct that engages the bone and the other being a polyethylene bearing construct that attaches to the metal base construct and articulates with a femoral stem prosthetic component. The metal base construct is composed of two different metals, one of which engages the bone surface and the other of which engages the polyethylene bearing construct. Each of these metals is selected so that its characteristics are well suited to its particular function. The first metal is selected so as to provide a superior bone-engaging face, while the second metal is selected so as to provide a superior polyethylene-engaging face. By combining the different material characteristics of two different metals in the metal bone construct, it is possible to simultaneously form a superior bone-engaging face and a superior polyethylene-engaging face.
Owner:HAYES JR DANIEL +1

Artificial hip joint bone fusion femoral stem

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.
Owner:BEIJING AKEC MEDICAL

Non-metal ball hip joint prosthesis

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.
Owner:JIASITE HUAJIAN MEDICAL EQUIP (TIANJIN) CO LTD

Preoperative planning method for hip joint revision surgery

The invention provides a preoperative planning method for hip joint revision surgery. The preoperative planning method comprises the following steps: acquiring pelvis CT data of a patient and reconstructing a pelvis three-dimensional model; performing data measurement on the pelvis three-dimensional model; carrying out registering on a mirror image uninjured side hip bone three-dimensional model and an affected side hip bone three-dimensional model, and determining the position of the central point of the affected side acetabulum; simulating acetabular cup prosthesis placement in the affectedside hip bone three-dimensional model, and determining the acetabular cup prosthesis type; simulating the installation of an acetabular cup prosthesis three-dimensional model, and if the acetabulum onthe affected side is still defective after installation, selecting the number and the positions of acetabular cup cushion blocks or performing filling by using a cup-on-cup technology; and determining the type of a femoral stem prosthesis and the type of a bulb prosthesis. The acetabulum defect area can be accurately determined before an operation, a reasonable operation scheme is formulated, a learning curve is shortened, the operation accuracy is improved, the operation complexity is reduced, the operation time is shortened, the bleeding amount of a patient during the operation is reduced,and the postoperative recovery time is shortened.
Owner:NANJING FIRST HOSPITAL

Total hip replacement preoperative planning method and device based on deep learning and X rays

ActiveCN111888059AGuaranteed accuracyGood preoperative supportJoint implantsX-rayHip socket
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.
Owner:LONGWOOD VALLEY MEDICAL TECH CO LTD

Artificial hip joint femoral stem

The invention provides an artificial hip joint femoral stem. The artificial hip joint femoral stem comprises a stem body, a femoral neck and an elastic component. A channel is formed in the stem body. The femoral neck is provided with a drive rod stretching downwards, and the drive rod is inserted into the channel. After the stem body is inserted into a femoral marrow cavity, the channel is communicated with the marrow cavity, pressure, pointing to the far end, borne by the femoral neck is transmitted to a contact interface of the stem body and the femoral near end through the elastic component, meanwhile, the far end of the drive rod protrudes into the marrow cavity to press marrow internal fluid, the pressure, pointing to the far end, borne by the femoral neck is shared jointly by the contact interface and sclerotin at the femoral far end, full femur bears the pressure, and along with disappearing of the pressure borne by the femoral neck, the femoral neck is reset through the elastic component. Mechanical or hydraulic drive is adopted, stress borne by the femoral neck is transmitted to the sclerotin at the femoral near end and the femoral far end, the stress area of a femoral stem prosthesis during stress transmitting is increased, and the requirements of people after hip replacement for jumping, running and other aggravating activities can be met.
Owner:张念非

Variable modulus personalized femoral stem prosthesis and manufacturing method thereof

The invention discloses a variable modulus personalized femoral stem prosthesis and a manufacturing method thereof. The personalized femoral stem prosthesis satisfies the requirements of a personalized femoral medullary cavity, and according to the force analysis of the prosthesis, topological optimization is conducted on an individualized shape main body structure of the prosthesis to obtain a spatial main body structure, the spatial main body structure is enveloped by a porous structure of which grades are freely communicated, and a shape is matched with the shape of the femoral medullary cavity. The porous structure of which the grades are freely communicated is designed according to various constraints such as a contact surface of a femoral stem, the force of the femoral stem, elasticmodulus matching and the like, spatially variable modulus is achieved, the personalized femoral stem prosthesis is prepared through laser selective melting, after cleaning and disinfection, inducing bone growth degradable hydroxy composite materials are filled, and the prosthesis is packaged and disinfected for preparation use.
Owner:SOUTH CHINA UNIV OF TECH

Cut-bone guide plate

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.
Owner:LONGWOOD VALLEY MEDICAL TECH CO LTD

Human body personalized hip joint femoral stem prosthesis adopting lightweight design and manufacturing method thereof

ActiveCN111728741AGuaranteed high compatibilityReduce weightJoint implantsTomographyHuman bodyGonial angle
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.
Owner:JILIN UNIV

Personalized femoral stem prosthesis easy to remove and renovate and manufacturing method thereof

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.
Owner:SOUTH CHINA UNIV OF TECH

Artificial alpha femoral stem prosthesis

The invention provides an artificial alpha femoral stem prosthesis, which comprises a femoral stem cone, a femoral neck and a stem body in integral connection. The upper end face of the femoral neck is provided with a tool operating hole, the stem body comprises a femoral stem near section, a femoral stem middle section and a femoral stem far section, and a deflection angle is formed between the femoral neck and the stem body. By adoption of the integral structure, problems of abrasion, bone erosion and the like among components are eliminated; the femoral neck is wide in a motion range, stability in prosthesis implantation and effectiveness in rotation resistance are realized, great conditions are created for growth and proliferation of bone cells and soft tissues, the fixing effect of the prosthesis in a human body is improved, the service life of the prosthesis is prolonged, the surgical success rate is increased, and post-surgical pains of patients are alleviated. In addition, thesurface of the prosthesis is coated with a titanium microporous coating, biocompatibility of the prosthesis is improved, strength, plasticity and toughness of the prosthesis are matched with those ofhuman bones, and accordingly perfect matching of the prosthesis with femora of patients is realized.
Owner:王岩 +1

Self-adaptive later-period stable type femoral stem prosthesis

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.
Owner:深圳协同创新高科技发展有限公司

Method for designing femoral stem prosthesis

The invention relates to the technical field of medical instruments, in particular to a method for designing a femoral stem prosthesis, and solves the problem that the existing femoral stem prosthesisis made of a material with high elastic modulus, so that the difference between the high elasticity and that of human femur is large, resulting in different degrees of stress shielding, the problem that the manufacturing process can hardly satisfy the manufacture requirement on customization and complex interior structure, so that high matching prostheses meeting the individual needs cannot be implemented, and other problems. The method comprises establishing an STL model, carrying out simulation operation to establish a model, establishing a finite element mesh model, establishing model material properties, establishing boundary conditions, setting topological optimization parameters and extracting an STL format file from the optimized model; and carrying out post-processing of fairing and the like to remove chessboard patterns in the software Inspire to obtain an optimized femoral stem model; manufacturing an optimized prosthesis with ti6al4v, and finishing the manufacture by meansof an electron beam melting technique through an Arcam Q10 plus metal printer. The method for designing the prosthetic stem structure adopts integral forming and has no need for cutting, splicing andother processing, and the structure is good in biocompatibility.
Owner:JILIN UNIV

Femoral near-end medullary cavity image data processing method and device, equipment and storage medium

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.
Owner:BEI JING LONGWOOD VALLEY MEDICAL TECH CO LTD +1

Femoral stem

The invention provides a femoral stem. According to the femoral stem, a column hole is formed in one end of a femoral stem body, a movable inserting piece is arranged on the peripheral face of the end corresponding to the femoral stem body of the column hole, a plugging column is arranged in the column hole and drives the inserting piece located on an initial position in the column hole to extend out towards the outside of the peripheral face to enable the inserting piece to be located in an inserting position. The column hole is formed in one end of the femoral stem body, the movable inserting piece and the plugging column inserted into the column hole are arranged on the peripheral face of the end corresponding to the femoral stem body of the column hole, the inserted plugging column drives the inserting piece located on the initial position in the column hole to extend out towards the outside of the peripheral face to enable the inserting piece to be located in the inserting position. Through the arrangement of the inserting piece with the inserting position at one end of the femoral stem body, after a femoral stem prosthesis with the inserting piece is implanted into the human body, the inserting piece on the femoral stem prosthesis is inserted into the physiological bones, and the stability of the implanted femoral stem prosthesis in the implantation later period is increased.
Owner:天衍医疗器材有限公司

Navigation equipment for femoral medullary cavity cutting operation by femoral myelocavity file

InactiveCN102085119AImprove the success rate of implantationDiagnosticsSurgical navigation systemsRight triangleProsthesis
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.
Owner:JIANGSU UNIV

Osteotomy guide plate

The invention discloses a 3D printed individual femoral neck osteotomy guide plate. The osteotomy guide plate comprises a femoral neck attachment part, a guide column and a cutting guide surface, wherein the femoral neck attachment part is suitable to ride across femoral neck, and the lower surface of the femoral neck attachment part is attached to the surface of the femoral neck; the guide columnis arranged on the upper surface of the femoral neck attachment part, is suitable to drive a kirschner wire so as to fix the osteotomy guide plate on the femoral neck; the front side surface of the femoral neck attachment part vertically extends upward to form the cutting guide surface, the cutting guide surface is attached to a saw blade so that the saw blade can cut the femoral neck downwards along the cutting guide surface. The osteotomy guide plate is applied to an artificial hip replacement surgery, can improve accuracy of osteotomy operation and accurately control osteotomy height and direction so as to improve accuracy of femoral stem prosthesis placement positions and contribute control of length of double lower limbs, and the surgery effect of the artificial joint replacement surgery is improved.
Owner:LONGWOOD VALLEY MEDICAL TECH CO LTD

Femoral stem prosthesis and manufacturing method thereof

The invention provides a femoral stem prosthesis and a manufacturing method thereof, and relates to the technical field of medical prosthesis to solve the technical problems that existing metal femoral stems loosen, yield and break easily. The femoral stem prosthesis is produced by laying multiple carbon fiber layers soaked by PEEK slurry; each carbon fiber layer comprises multiple long carbon fibers, and the direction of the long carbon fibers in the femoral stem prosthesis is identical with that of bone fiber. The manufacturing method comprises the steps as follows: knitting the long carbonfibers into the carbon fiber layers; soaking the carbon fiber layers in the PEEK slurry doped with short carbon fibers; laying the multiple carbon fiber layers in a mold layer by layer; curing the multiple carbon fiber layers by the mold. The technical scheme can prevent the femoral stem prosthesis from loosening, so that the femoral stem prosthesis has the characteristic of anisotropy, can bear loads in multiple directions and cannot yield or break easily, and the service life of the femoral stem prosthesis is prolonged.
Owner:北京安颂科技有限公司

Artificial alpha femoral stem prosthesis

The present disclosure provides an artificial alpha femoral stem prosthesis which includes a femoral stem cone, a femoral neck and a stem body connected integratedly, wherein a tool operating hole is arranged at upper end of the the femoral neck; the stem body comprises a proximal segment of the femoral stem, a middle segment of the femoral stem and a distal segment of the femoral stem, and there is a deflection angle between the femoral neck and the stem body.
Owner:BEIJING LIDAKANG TECH

Femoral stem with partially recessed porous coating

The femoral stem prosthesis includes a prosthesis body having a neck, stem, and porous coating receiving area. A portion of a transition between the porous coating receiving area and the stem is defined by a recess where the porous coating receiving area inwardly extends by a depth relative to the stem while the porous coating receiving area is approximately flush with the stem about a remainder of the transition between the porous coating receiving area and the stem. A porous coating overlying the porous coating receiving area has a thickness approximately equal to the depth of the recess to define a smooth transition between the porous coating and the stem along the portion of the transition by the at least one recess and a collar outwardly extending relative to the stem by approximately the thickness along the remainder of the transition between the porous coating receiving area and the stem.
Owner:JOINT DEV

Artificial hip joint femoral stem prosthesis

The invention discloses an artificial hip joint femoral stem prosthesis. The femoral stem prosthesis comprises a femoral stem cone, a femoral neck and a femoral stem which are sequentially connected;the femoral stem comprises a femoral stem proximal end, a femoral stem body and a femoral stem distal end which are integrally formed; the femoral stem proximal end is divided into a femoral stem proximal end inner side and a femoral stem proximal end outer side according to the angle of the central angle of a cross section, and the central angle corresponding to the femoral stem proximal end inner side is 120 degrees; the taper of the femoral stem proximal end inner side decreases along the femoral stem from near to far; the taper of the femoral stem proximal end outer side is constant; the femoral stem distal end is of a cylindrical structure or a tapered structure. The artificial hip joint femoral stem prosthesis can adjust the anteversion angle of the femur to a normal anatomical position in cases of combined femoral anteversion angle variation and narrow medullary cavity, and has a good implantation effect, is simple to operate and facilitates large-scale popularization and use.
Owner:张国强 +1

Femoral stem prosthesis and mounting method thereof

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.
Owner:上海联影智融医疗科技有限公司

Electrolyte plasma polishing method for titanium alloy femoral stem prosthesis

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.
Owner:TAIYUAN UNIV OF TECH +1

Femoral stem prosthesis implantation device

The invention discloses a femoral stem prosthesis implantation device, and relates to the technical field of orthopedic surgical instruments. The femoral stem prosthesis implantation device comprisesan implantation device main body; when in use, the implantation device main body is connected to a femoral stem prosthesis; a connector is arranged at the lower end of the implantation device main body; the connector comprises at least two valvular structures; when the valvular structures are closed together, the outside surface of the connector is of a sphere structure; an operating rod is arranged in the implantation device main body in the axial direction; the operating rod can reciprocate along the axial direction of the implantation device main body; when the operating rod moves towards the connector, each valvular structure can be driven to open outwardly; the connector cannot pass through the opening of a holding hole in the femoral stem prosthesis; when the operating rod moves in the direction away from the connector, the valvular structures are closed together, and the connector can get in and out of the holding hole. According to the femoral stem prosthesis implantation device in the invention, the valvular structures with the spherical surfaces can reduce shaking conduction between the implantation device and the femoral stem prosthesis; and the fixing effect of the bonecement femoral stem prosthesis can be easily improved.
Owner:TIANJIN ZHENGTIAN MEDICAL INSTR CO LTD

Personal guide device of implanting anteversion angle for femoral stem prosthesis

The invention relates to a personal guide device of implanting anteversion angle for a femoral stem prosthesis, characterized by comprising a bone attaching plate and a guide plate; the bone attachingplate and the guide plate are formed in a whole at a time; the shape of the bone attaching plate is designed by reference to the design of the outer surface of the femur matched with the bone attaching plate; the bone attaching plate is of curved structure; a curved face of the bone attaching plate matches with the outer surface of the proximal end of the femur; a guide face fits an osteotomy face; the guide face matches with a preoperatively-set prosthesis side; the guide plate and the osteotomy are fitted to form a receiving channel. The personal guide device has the advantages that the personal guide device is designed according to personal bones, intraoperative precise positioning is available, the implanting anteversion angle of the prosthesis can be accurately determined, the relationship between the guide face and the prosthesis is clear, and the personal guide device has a promising application prospect in the replacement of artificial hip joint.
Owner:SHANGHAI TONGJI HOSPITAL

Anti-loosening femoral stem prosthesis

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.
Owner:北京中安泰华科技有限公司

Biotype artificial hip joint femoral component

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.
Owner:刘礼初 +1

Prosthesis registering device

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.
Owner:马若凡 +1

Femoral stem prosthesis electrolytic machining cathode and femoral stem prosthesis electrolytic machining device

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.
Owner:GUANGDONG UNIV OF TECH
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