5 results about "Artificial joints" patented technology

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.

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 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.

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.