Design and manufacturing method of polyether-ether-ketone bionic multilevel artificial joint

Abstract

The invention discloses a design and manufacturing method of a polyether-ether-ketone bionic multilevel artificial joint. The design and manufacturing method of the polyether-ether-ketone bionic multilevel artificial joint comprises the following steps of firstly, performing preoperative planning according to actual joint replacement, reconstructing a joint three-dimensional model of a patient, and performing mechanical analysis to obtain a joint stress distribution result; then according to the condition of the patient and the joint stress distribution result, designing the joint in a mode ofmodulus and strength, forming different modulus, strength and functional areas, and performing partition data processing on the final joint model according to the area requirements of different requirements, forming a process data packet containing 3D printing parameters; and leading the 3D printing process data packet into a 3D printer, controlling the 3D printing process, selecting different materials according to the result of the partition design, adopting multiple nozzles for simultaneous printing, and obtaining the required artificial joint by regulating and controlling different temperature and high-layer printing parameters. According to the method, the bionic multi-layer wear-resistant and bone-long-entry joint structure is designed, 3D printing is adopted for rapid manufacturing, and integrated design and production are formed.

Description

technical field [0001] The invention relates to the technical field of 3D printing of polyether ether ketone artificial joints, in particular to a design and manufacturing method of polyether ether ketone bionic multi-layer artificial joints. Background technique [0002] Artificial joints are implantable prostheses that replace diseased or damaged joints, and need to meet certain mechanical performance requirements, biocompatibility requirements, wear resistance requirements, etc. At present, the artificial joint components at home and abroad are mainly metal joints, such as cobalt chromium molybdenum alloy (CoCrMo) alloy joints and titanium (Ti) alloy joints, but the elastic modulus of metal joints is much greater than that of bones, so it is easy to produce stress shielding effect, causing bone resorption and bone atrophy, leading to complications such as aseptic loosening of joints; in addition, metal joints will produce artifacts in X-ray films, which interfere with med...

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Problems solved by technology

Current research is mainly focused on the modification of homogeneous single PEEK materials and PEEK composite materials, such as surface treatment and modification of PEEK, but it is difficult to further improve the mechanical properties of PEEK materials only by modification Adapt to the different elastic modulus requirements of natural bones; there have also been researches on composite materials such as carbon fiber (CF) and PEEK, hydroxyapatite (HA) and PEEK, and modified composite materials, but most of them only stay on a single material Combining with PEEK is difficult to meet the diverse and multi-level functional requirements of artificial joints, and mainly focuses on the preparation process of materials, and there are few studies on the actual design and manufacture of artificial joints; in addition, some studies have designed There is a certain level of joint structure, but it is often designed with a standardized structure, which cannot meet the individual needs of patients. At the same time, some hierarchical structures do not conform to the natural characteristics of the human body. For example, the middle bone layer is hard and the inner and outer layers are porous. The structure will not meet the wear resistance requirements and the internal hardness is too large. Some hierarchical structures use metal materials in material selection, and there will be various problems faced by metal joints. In addition, these studies have not yet proposed a suitable manufacturing method. Difficult to be used in the actual production of artificial joints

At present, the artificial joint research of PEEK material focuses on a single aspect of design, material, and process, and has not formed an integrated design and production method.

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