44 results about "Artificial joints" patented technology

The invention discloses an artificial joint frictional wear simulation testing machine and a testing method thereof. The testing machine comprises a motion loading module, a sample clamping module and a motion coupling module, the motion loading module mainly drives an upper sample of the sample clamping module to generate fundamental frequency swing through a double four-bar-planetary gear train composite mechanism, and the sample clamping module integrates a quick disassembly and assembly clamp and a temperature control lubrication system to fix various joint prostheses and simulate the physiological environment of the human body. And the motion coupling module cooperates with the motion loading module based on the six-degree-of-freedom parallel platform to realize composite action and suppress vibration interference. Through cooperative control of the three modules, the problems that an existing artificial joint friction and wear simulation testing machine is limited to a single joint type and cannot adapt to various artificial joint prostheses, and the degree of freedom of motion is limited, so that various motion forms of the artificial joint cannot be completely restored are solved.

The invention provides a temporomandibular artificial joint replacement device, a preparation method and a surgical robot system.The temporomandibular artificial joint replacement device is characterized in that a mandibular fixing support is fixedly connected with the outer side face of the mandible of the human body, a temporal bone fixing support is fixedly connected with the outer side face of the temporal bone of the human body, a containing cavity is formed in a glenoid fossa liner, and a spherical joint head is movably arranged in the containing cavity; a base layer, a variable-rigidity elastic buffer layer and a surface layer are sequentially arranged on the inner wall of the containing cavity in the thickness direction of the side wall of the glenoid fossa liner. By means of the temporal-mandibular artificial joint replacement device, efficient simulation of the temporal-mandibular joint replacement device on a real human body temporal-mandibular joint structure can be achieved, the structural strength and the use comfort of the temporal-mandibular artificial joint replacement device are improved, and based on artificial intelligence and a surgical robot auxiliary technology, the device is simple in structure and convenient to use. The preparation function of the temporomandibular artificial joint replacement device matched with the human tissue structure and the automatic assembly surgical operation are achieved.

An ultrasonically vibrating surgical tool for removing cement (7) in artificial joint revision surgery has an ultrasonic vibration source operationally coupled to a working tip (5) that acts on the cement (7) in the lumen (8) of a bone such as a femur (1). When acting on the cement (7), the tool vibrates at substantially a single resonant frequency. If the working tip (5) comes into contact with a hard material such as the bone wall (6) of the femur (1), additional supplemental vibrations are generated at other frequencies. The tool is equipped with a microphone or other vibration detector to pick up these supplemental vibrations, which may be in the audible or ultrasonic range. If supplemental vibrations are detected at a frequency characteristic of contact between the working tip (5) and bone, the user of the tool is warned and the operation of the tool is interrupted.

The utility model discloses a bone handle positioning structure of artificial joint, including joint axle seat, bone handle and set between the both positioning structure body, the top of joint axle seat is provided with thread groove, is provided with gasket groove on the bottom inner wall of thread groove, is provided with axle groove on the bottom inner wall of gasket groove, and the bottom end of bone handle is movably inserted into the axle groove. The utility model discloses a series of structure is set up, is convenient for to bone handle pressure fixed position restriction and integrated automatic to threaded part elasticity tight anti -looseness, utilizes the tight elasticity that always exists, improves the thread engagement locking strength of threaded part, reduces the risk of positioning failure caused by thread loosening when long -term application, improves the stability of use, and through the mode of the movable sleeve of conical sleeve screwing cooperation, when the bone handle or conical sleeve is split and is replaced individually after long -term use and the like factors such as serious wear, reduce the cost phenomenon caused by overall replacement, improve the use flexibility.

This invention relates to a titanium alloy artificial joint with a high-toughness, ultra-wear-resistant ceramic coating and its preparation method. The titanium alloy artificial joint includes a titanium alloy artificial joint substrate fabricated by 3D printing. The joint surface of the titanium alloy artificial joint substrate is coated with an alumina-based ceramic coating. The alumina-based ceramic coating is obtained by plasma spraying of a mixed powder of alumina, zirconium oxide, and rare earth oxides, and then polished to a surface roughness Ra of no more than 0.05 μm. The bone-bonding surface of the titanium alloy artificial joint is formed into a porous structure layer by 3D printing. Compared with the prior art, the titanium alloy artificial joint of this invention has excellent wear resistance and toughness, and can be personalized based on precise imaging data of the patient's bones.

The application discloses an artificial joint mold, a preparation method of an artificial joint and the artificial joint, and relates to the technical field of artificial joints. The mold comprises a female mold, which is provided with a recess position, and the bottom of the recess position is provided with a mounting hole; a male mold assembly, which comprises a pressing head; and a plug column, which is used for detachably assembling the mounting hole. In the processing process, the plug column can be firstly mounted in the recess position and assembled in the mounting hole, a first raw material layer is placed in the recess position, and after a first blank is formed by corresponding pressing heads, a hole is formed at the position of the plug column on the first blank; then, the plug column is replaced by an insert, the insert body of the insert can pass through the hole and extend into the mounting hole, the flange of the insert is lapped on the first blank, a second raw material layer is placed in the recess position, the flange is directly clamped between the first and second raw material layers by corresponding pressing heads, and the inner lining element formed by processing the raw material is directly and integrally embedded with the insert, so that the preparation is convenient.

The application discloses a convenient dismounting artificial joint blister packaging box and a dismounting method, relates to the related field of artificial joint blister packaging, and aims at solving the problem that the shock-absorbing structure arranged on the existing blister packaging box firmly clamps the artificial joint, avoids displacement of the artificial joint in the blister packaging box or self-collision of the artificial joint with the packaging box after the artificial joint is subjected to external force impact, and causes self-damage of the artificial joint, but the artificial joint is firmly clamped, and the artificial joint is inconvenient to be taken out from the blister packaging box when the artificial joint is used, and the use is not convenient enough. An inner artificial joint placing box body is arranged in the box body inner cavity, the inner artificial joint placing box body comprises a placing outer edge and a placing box body main body, and the placing box body main body is internally provided with an artificial joint placing cavity; first half fixing pipes are equidistantly connected to the two sides of the lower end surface in the placing box body main body from front to back, and the first half fixing pipes are internally provided with first inner buffer cavities.

The application discloses a method for inhibiting the generation of an oxide film of a zirconium alloy in a high-temperature gas nitriding process, and belongs to the field of artificial joint ball head surface modification. High-purity iron beads are used as a deoxidizer in the high-temperature gas nitriding process to inhibit the generation of an oxide film on the surface of the zirconium alloy, and X-ray diffraction is used to analyze the phase of the surface coating. The high-purity iron beads used as the deoxidizer can effectively inhibit the generation of the oxide film on the surface of the zirconium alloy, the prepared ZrN coating is more pure, the impurity phase is reduced, the thickness of the coating reaches 5-8 microns, the hardness of the prepared ZrN coating reaches 600-850 HV through Vickers microhardness testing, and the hardness of the ZrN coating prepared without using the high-purity iron beads as the deoxidizer is improved by 20-40%. The friction and wear test in a SBF simulated body fluid is used to simulate the internal service environment of the artificial joint in the human body, and the average friction coefficient is reduced by 10-25% after the deoxidization of the high-purity iron beads, and the biological tribological performance is significantly improved.

This application relates to a method, system, device, storage medium, and program product for monitoring the wear state of artificial joints. It acquires a first voltage signal output by a recognizer when the spherical structure and plate structure in a first joint simulation structure move relative to each other. This first voltage signal is then input into a wear state monitoring model to identify the working state of the first joint simulation structure, thus obtaining its current working state. This method ensures the accuracy and reliability of the artificial joint wear state identification results. Furthermore, by directly capturing the voltage signal generated by the relative movement of the spherical and plate structures, it achieves real-time monitoring of the joint's working state, effectively solving the problem of inefficient and accurate perception of the wear state of artificial joint structures. This provides scientific and reliable technical support for timely maintenance, fault warning, and service life assessment of joint structures.

The application relates to a swing angle measuring and calibrating device of an artificial joint friction and wear test system, which is characterized by comprising a first connecting shaft, a second connecting shaft, a locking sleeve, a special-shaped flange, an incremental encoder and a laser instrument, the head of the first connecting shaft is used for fixedly connecting a first swing arm of the artificial joint friction and wear test system, the tail of the first connecting shaft is vertically provided with the second connecting shaft, the second connecting shaft is installed at the upper end of the special-shaped flange, the installation position of the second connecting shaft can be adjusted along a radial direction of the upper end of the special-shaped flange, and the lower end of the special-shaped flange is coaxially provided with the incremental encoder; and the laser instrument is coaxially installed at the center of the upper end of the special-shaped flange. The device can convert the swing of the swing arm of the artificial joint friction and wear test system into the self-rotation of the incremental encoder, so that the swing angle of the swing arm of the artificial joint friction and wear test system can be accurately calibrated.

The invention discloses a zirconium-niobium alloy ceramic composite material and a preparation method thereof, and relates to the technical field of metal ceramic composite material preparation. The composite material is prepared by taking a zirconium-niobium alloy Zr-Nb as a matrix through the steps of pretreatment, annealing treatment, subzero treatment, post-treatment, thermal oxidation, thermal oxidation post-treatment and the like, and the performance can be further optimized through bioactive slurry coating; in the preparation process, the requirement of thermal oxidation on atmosphere is reduced through annealing treatment, and the hardness of the material is enhanced and residual stress is eliminated through subzero treatment. The prepared zirconium-niobium alloy ceramic composite material has the characteristics of high film binding force, high hardness, wear resistance, corrosion resistance, good biocompatibility and the like, and is suitable for the field of medical implants (such as artificial joints).

The application discloses a grain refinement preparation process for improving the fatigue strength of titanium alloy rod for medical devices, which comprises continuously rolling titanium alloy coarse rod into finished fine rod; a water quenching tank is arranged on one side of a multi-roller rolling mill for continuous water quenching; after the whole finished fine rod is water quenched to a temperature at which the grains no longer grow, the grain refinement is completed by taking out the finished fine rod from the water quenching tank. The preparation process realizes integrated rolling and online instant water quenching process, directly enters the tank for water quenching in a high-temperature state at the end of rolling, and has no transfer, no secondary heating, no time interval, and extremely fast water cooling at a critical phase change temperature to refine the grains, so that the grain size is ≤7 microns, the metallographic grade is A, and the fatigue strength theoretical analysis (calculation) is ≥500 MPa, and the process is suitable for medical device implantation requirements such as artificial joints, spinal fixation nails and intramedullary nails. The process discards high-cost secondary heat treatment and liquid nitrogen cooling, and significantly improves implant safety and mass production efficiency.

The invention discloses a broad-spectrum efficient antibacterial polymer composite material as well as a preparation method and application thereof, and particularly relates to the technical field of production of polymer composite materials. According to the broad-spectrum efficient antibacterial polymer composite material, PA6 is used as a main body, an organic antibacterial pyridine ring and an inorganic antibacterial material metal silver are synthesized into an antibacterial agent, then long-chain quaternary ammonium salt is grafted, N-butylbenzenesulfonamide, thymol and the like are further compounded to serve as the antibacterial agent, and the broad-spectrum property and the high efficiency of the antibacterial property of the material are remarkably improved. The defects that a traditional antibacterial material is few in antibacterial variety, slow in effect taking time and short in acting time are effectively overcome; the antibacterial rate of gram-positive bacteria in 24 hours is larger than or equal to 99%, the virus titer of the film is reduced by 4.2 log10, the antibacterial rate in 1 hour reaches 92.1%, the dynamic friction coefficient is 0.2-0.4, the tensile strength is larger than or equal to 35 MPa, the hand feeling is not lost while the tensile strength and the antibacterial property are guaranteed, and the film is suitable for the fields of medical dressings, artificial joints, environment, industry and the like.

The invention discloses a preparation method and application of a surface active coating, and belongs to the technical field of artificial joint coatings. A magnesium-doped porous titanium dioxide nanotube array layer and a zinc-strontium co-doped mesoporous bioactive glass release layer are formed on the surface of a substrate; the single performance such as the bonding strength, the osteogenic activity and the antibacterial ability of the coating is exceeded, and more importantly, the unification and the continuous high efficiency of the performance are realized through the gradient and synergistic system design of the coating; a new solution is provided for solving the two major problems of artificial joint replacement, namely sterile looseness and antibacterial ability, and the method has extremely high clinical transformation value and market prospect.

The invention discloses an artificial joint mold, a preparation method of an artificial joint and the artificial joint, and relates to the technical field of artificial joints. The die comprises a female die provided with a concave position, and a mounting hole is formed in the bottom of the concave position; the male die assembly comprises a pressing head; and the plug column is used for being detachably assembled in the mounting hole. In the machining process, the plug column can be installed in the concave position and assembled in the installation hole, the first raw material layer is placed in the concave position, after a first blank is formed through mold pressing of a corresponding pressing head, an inner hole is formed in the position of the plug column on the first blank, then the plug column is replaced with the insert, and the insert body of the insert can penetrate through the inner hole and stretch into the installation hole. The lapping edge of the insert is lapped on the first blank, then the second raw material layer is placed in the concave position, the lapping edge is directly clamped between the first raw material layer and the second raw material layer through mold pressing of the corresponding pressing head, the lining element formed by raw material machining is directly and integrally connected with the insert in an embedded mode, and preparation is convenient.

The invention relates to the technical field of hip joint replacement auxiliary activities, and discloses a hip joint replacement auxiliary activity device which comprises a fixing mechanism and further comprises a frame body, a connecting column is fixedly connected to the outer wall of the frame body, frame feet are fixedly connected to the outer wall of the frame body, and rolling wheels are rotationally connected to the outer wall of the frame body; the pressing mechanism is fixedly connected to the outer wall of the frame body, and the extrusion mechanism is used for assisting a user to sit down, is fixedly connected to the outer wall of the frame body and is used for decelerating the device; the locking mechanism is fixedly connected to the outer wall of the frame body and used for locking the device, when a user sits down, due to the fact that the initial turning plate is in an inclined state, when the user sits down, the turning plate can rotate on the seat cushion to assist the user in sitting down, in this way, the stress parts of hip joints are reduced, and the hip joints are prevented from being damaged. And the situation that the service life is affected due to dislocation of the artificial joint or prosthesis abrasion is prevented.

Provided are a bone cutting tool assembly for artificial joint surgery. The assembly comprises a guide unit including a body having at least one guide slit and an anchor configured to extend from a side of the body, having a plurality of pin insertion holes; and a length measuring unit including a reference module having a slit insertion part inserted into the guide slit and a moving guide part extending in a direction perpendicular to a surface of the slit insertion part, and a position variable module slidingly coupled to the reference module through the moving guide part.

The invention provides a vacuum suction casting forming device and method for an artificial joint implant in order to overcome the defects of a traditional gravity casting forming process. The device comprises a smelting crucible, a flow guide pipe and other components, the vacuum suction casting principle is utilized, molten metal is rapidly and evenly filled, the yield is increased to 60% or above, waste of expensive materials is reduced, and the production efficiency is improved through the batched mold shell arrangement design. And through the design of flow guide pipe throttling control, ceramic-based sealing gasket sealing, the height difference between the part mold shell and the sleeve mold shell and the like, the filling uniformity and the forming quality integrity are ensured. The method comprises the steps of wax mold manufacturing, wax mold assembling, mold shell machining, negative pressure suction casting, part forming and the like, and high-quality forming is ensured by controlling parameters of all links. The production efficiency and the metal recovery rate are further improved through high-temperature roasting and preheating of the mold shell, the cylindrical tree assembling technology and the like.

The invention relates to an isothermal precision forging die for a special metal artificial joint containing a rib plate with a specific angle and a process method, and relates to the field of special metal processing and molding, the die is improved by regional control, the die comprises a ceramic heating rod, a heat-conducting copper foil and a sensor, and an upper die is divided into a rib plate molding region, a main body molding region and a lower die; specifically, for a rib plate with a specific angle existing in an artificial joint, in order to guarantee good performance and strength of the rib plate, multi-condition parameters are introduced, and the forging speed and heating related parameters are determined according to an optimized mold model within a controllable range in a regional and multi-stage mode. According to the method, the problem that blank forming at the position of the rib plate of the artificial joint is difficult in the die forging forming process is solved, the defects of the finished rib plate in the structure and performance are reduced, guidance can be provided for isothermal precision forging of the special metal artificial joint containing the rib plate with the specific angle, and the method is suitable for large-scale popularization and application. And the forming efficiency and the yield can be greatly improved, and meanwhile, the utilization rate of materials is also improved.

This invention discloses a method for preparing UHMWPE profiles, as well as the UHMWPE profiles and their applications, belonging to the field of biomedical polymer materials technology. The preparation method of the UHMWPE profiles enables the UHMWPE profiles to achieve a balance between "high wear resistance" and "high impact resistance." Furthermore, using the UHMWPE profiles to prepare implantable artificial joint materials can ensure the wear resistance required for clinical use while significantly improving the safety margin and long-term reliability of artificial joints under complex stresses.

The invention relates to the technical field of artificial joint prostheses, in particular to a polyethylene composite molded artificial joint friction liner and a preparation method thereof, and the method comprises the following steps: firstly, respectively manufacturing a high-crosslinking blank and a non-crosslinking blank, and enabling the high-crosslinking blank and the non-crosslinking blank to have matched contact interfaces; then putting the two parts into a mold consisting of an inner mold and an outer mold according to a position relationship, and ensuring that all contact surfaces are matched and butted; then carrying out mold pressing treatment, firstly applying initial pressure at low temperature, then heating to 150-250 DEG C and boosting to 10-20 MPa for hot-pressing compounding, so that a non-crosslinking part is molten and is integrated with a high-crosslinking part at an interface; and finally, cooling, demolding and machining to obtain a finished product. The friction surface of the prepared friction liner is made of a high-crosslinking material, the friction liner is endowed with excellent wear resistance, the base body of the friction liner is made of a non-crosslinking material, excellent mechanical strength and toughness are provided, and the technical problem that wear resistance and impact resistance of an artificial joint are difficult to consider at the same time is perfectly solved.

The present application belongs to the technical field of artificial joint preparation, and particularly relates to a method for preparing a titanium-carbon nanometer multilayer composite coating with interface fusion characteristics. The method comprises the following steps: S01, preparing a 3D printed titanium alloy as a base material; S02, alternately preparing a Ti-TiN layer with interface fusion characteristics by using cathode arc ion plating and anode layer ion beam, and the number of layers of the Ti-TiN layer is not less than 5 layers; and S03, preparing an amorphous carbon lubricating layer. The preparation method mainly realizes the change of gas flow under the premise of setting a constant current. There is no obvious interface structure between the prepared TiN layer and Ti layer, and the whole TiN-Ti layer is a continuous structure. The structure has good energy absorption characteristics, and can slow down the stress cracking and falling off phenomenon of the coating under impact working conditions.

This invention discloses an automatic CNC milling fixture in the field of artificial joint processing and manufacturing technology. An adjustment component is provided on the upper part of the cylinder pressure plate to adapt to the rotation of the cylinder pressure plate. A cleaning component is provided above the adjustment component to clean impurities on the CNC fixture. A flexible pressing component is provided above the cylinder pressure plate to press and fix the hip joint forging. Driven by the cleaning component, the flexible pressing component presses the grooves on the surface of the hip joint forging after the surface has been cleaned, preventing scratches on the grooves. Furthermore, because the contact area between the flexible clamping block and the grooves on the surface of the hip joint forging is made of flexible material, the flexible clamping block can deform accordingly to press the grooves on the surface of the hip joint forging, preventing the hip joint forging from shifting.

The application discloses a bidirectional actuation composite film based on graphene and application thereof. The composite film mainly comprises two layers of films; the lower layer is polyvinylidene fluoride, and the upper film is composed of graphene and polydimethylsiloxane. The composite film has the advantages of fast response speed, large deformation range, excellent mechanical performance, low cost, simple preparation and the like. The composite film can respond to various stimulations such as organic solvents, temperature and light. The composite film can be made into a bidirectional switch circuit with an organic solvent indicating function to indicate the specific organic solvent existing in the environment due to the reverse bending direction of the composite film to the specific organic solvent. In addition, the excellent mechanical performance of the composite film can support the application of the composite film as an artificial joint and bionic animal motion.

The utility model discloses an acetabulum part prying-out testing device, and particularly relates to the technical field of artificial joint prosthesis testing, which comprises a working table, a base fixedly arranged at the top of the working table, a mounting cylinder fixedly arranged at the top of the base, a fixing frame fixedly arranged at the top of the mounting cylinder, and a fixing mechanism arranged on one side of the fixing frame. The fixing mechanism comprises a through pipe fixedly arranged in the fixing frame, a suction cup is arranged at the top of the through pipe in a penetrating mode, an air pump is fixedly arranged at one end of the through pipe, a plurality of first electric telescopic rods are fixedly arranged on the inner wall of the fixing frame, and fixing plates are fixedly arranged at the output ends of the first electric telescopic rods. Guide blocks are fixedly arranged on the two sides of the fixing plate, and a guide groove is formed in the inner wall of the fixing frame. According to the utility model, the sucker is matched with the arc-shaped rubber plate, so that the acetabulum parts with different sizes are firmly fixed, the acetabulum parts are convenient to disassemble and replace, and the device is convenient to maintain and the test precision is ensured.

The invention provides a preparation method of an artificial joint with a long-acting lubricating coating capable of being regenerated in situ. The preparation method comprises the following steps: cleaning and drying an artificial joint base body to obtain a clean base body; immersing the clean substrate into the three-dimensional cross-linked network precursor solution, and performing three-dimensional cross-linked network structure under ultraviolet irradiation to obtain a network substrate; and immersing the network matrix into a molecular brush precursor solution for reaction to form a molecular brush with a long-chain structure, and jointly forming a lubricating coating loaded on the artificial joint matrix by the molecular brush and the three-dimensional cross-linked network structure. The invention further provides an artificial joint. The lubricating coating is formed by compounding the three-dimensional cross-linked network structure and the long-chain molecular brush, the network structure bears normal load, resists shear stress and protects the molecular brush bonded in the network structure, and the molecular brush is prevented from being sheared; and the molecular brush provides a hydrated lubrication effect and supports the network structure, so that damage caused by external force is avoided, and the lubrication coating has the effects of renewable structure and long-lasting lubrication performance.

The invention relates to the technical field of orthopaedic implantation medical instrument manufacturing, and discloses an artificial intelligence-based artificial joint prosthesis manufacturing system, which comprises a fluid dynamics reverse analysis unit and a topological structure logic generation unit, and is used for constructing a variable stiffness filtering lattice mapped with a multiphase flow transient pressure field; according to the method, an elastic micro-beam unit reversely configured according to the moment of inertia of the section is generated in a high-pressure impact core area, a pressure response deformation mechanism is established, and finally an integrally-formed additive manufacturing instruction is output. The self-adaptive switching between micro-pore particle interception under low pressure and elastic reaming transient pressure relief under high pressure is realized, the in-situ fluid regulation function of the static implant is improved, and the fat embolism risk in the implantation process is avoided.

The invention discloses a preparation method of a near-infrared micro-strain stress luminescent material Sr3Sn2-ySbyO7-y / 2 and a rare earth doped variant Sr3Sn2-ySbyO7-y / 2: Ln < 3 + > thereof and a stress sensor application, and belongs to the field of stress luminescent materials and biological joint nondestructive stress monitoring. The expression of the stress luminescent material is Sr3Sn (2-y) SbyO7-y / 2 or Sr3Sn (2-y) SbyO7-y / 2: Ln < 3 + >, y is 0.005, 0.01, 0.015, 0.02 or 0.05, and Ln < 3 + > is one of Tm < 3 + >, Eu < 3 + >, Pr < 3 + >, Sm < 3 + >, Nd < 3 + >, Yb < 3 + > and Er < 3 + >. The method is applied to in-situ stress monitoring of the artificial joint after replacement.

To provide a sliding member having improved wear resistance, and a method of manufacturing the sliding member. A femoral head ball according to an aspect of the present disclosure includes a composite ceramic containing alumina and at least one oxide other than alumina. A surface roughness Ra of the sliding surface when the femoral head ball slides against a constituent member constituting an artificial joint is not more than 0.01 μm. The sliding surface includes a plurality of recessed portions each having an opening diameter of not more than 2 μm.