A kind of modular shoulder joint prosthesis and its manufacturing method
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A shoulder joint and modular technology, applied in the field of modular shoulder joint prosthesis and its manufacturing, can solve problems such as prosthesis loosening, surrounding tissue damage, and the inability to meet the needs of simultaneous treatment and replacement of patients with shoulder joint damage as a whole.
Active Publication Date: 2022-05-17
BEIJING CHUNLIZHENGDA MEDICAL INSTR
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Problems solved by technology
In the collection of a large number of case plans, it was found that a large proportion of shoulder joint treatment patients had damage to the scapula, glenoid and humerus, requiring overall replacement, but the humeral prosthesis and scapular prosthesis in the existing shoulder joint prosthesis are separate Existence, the humeral shoulder joint is implanted independently with the intact scapula, and the scapula is also implanted independently with the intact humerus, so it cannot meet the needs of simultaneous treatment and replacement of patients with overall shoulder joint damage. In addition, the existing humeral stem of the shoulder joint All replacements are cement-type implants, but bone cement is an inert material, and long-term fretting will cause prosthesis loosening, and bone cement monomers can release a lot of heat when they polymerize, causing damage to surrounding tissues
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Embodiment 1
[0050] Embodiment 1 of the present invention provides a kind of modular shoulder joint prosthesis, such as figure 1 As shown, it includes a scapular prosthesis 1, a glenoid prosthesis 2, and a humeral prosthesis 3. The shape and size of the scapular prosthesis 1, glenoid prosthesis 2, and humeral prosthesis 3 are all based on the patient's own scapula The dimensions of the scapula, glenoid and humerus are optimized to make them nearly consistent with the structural dimensions of the scapula, glenoid and humerus in the normal period of the patient. Specifically, the scapula prosthesis 1 is preferably made of titanium alloy and polyetheretherketone material, wherein the polyetheretherketone material has high load-bearing strength and low elastic modulus, thereby allowing physiological load-bearing conditions Therefore, the scapula prosthesis 1 made of polyetheretherketone material can be well integrated with the human body, and can significantly reduce stress shielding and avoid...
Embodiment 2
[0055] Embodiment 2 of the present invention provides a method for manufacturing a modular shoulder joint prosthesis, such as image 3 As shown, the manufacturing method includes the steps of:
[0056] S1. Collect medical imaging information of the patient's humerus, glenoid, and scapula, and establish a three-dimensional model based on the structural parameters of the humerus, glenoid, and scapula obtained from the medical imaging information;
[0057] S2. With reference to the structural parameters of the standard human humerus, glenoid and scapula, the three-dimensional models of the humerus, glenoid and scapula are corrected one by one;
[0058] S3. According to the three-dimensional models of the humerus, glenoid and scapula, the humeral prosthesis 3, the glenoid prosthesis 2 and the scapular prosthesis 1 are printed out by additive manufacturing process;
[0059] S4. Recheck the printed humeral prosthesis 3, glenoid prosthesis 2 and scapular prosthesis 1 according to th...
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Abstract
The invention provides a modular shoulder joint prosthesis and its manufacturing method, which includes: a scapular prosthesis, a glenoid prosthesis and a humeral prosthesis, the glenoid strut free end of the glenoid prosthesis is connected to the glenoid prosthesis The glenoid part of the scapula prosthesis is movable and pivotally arranged, and the glenoid inner sleeve of the glenoid prosthesis is set in the articulation groove of the humeral head of the humerus prosthesis; and the outer wall of the humerus stem is covered with a bone beam structure. In this way, a complete set of scapular prosthesis, glenoid prosthesis and humeral prosthesis can be provided, which can meet the needs of patients with damaged humerus, glenoid and scapula, and also truly simulate the relationship between the human scapula and glenoid. The relative activity relationship between them, and the outer wall of the humeral stem is covered with a bone trabecular structure, so that human tissue can be quickly and firmly attached to the prosthesis, and it solves the problem of easy loosening of the prosthesis caused by bone cement and the release of the monomer during polymerization. A large amount of heat causes problems such as damage to surrounding tissues.
Description
technical field [0001] The invention relates to the technical field of shoulder joint replacement, in particular to a modular shoulder joint prosthesis and a manufacturing method thereof. Background technique [0002] The shoulder joint is the most flexible joint in the human body. Its main function is to perform flexion, extension, abduction, adduction, external rotation and internal rotation. Therefore, the shoulder joint is an important part of the human body. When the shoulder joint is damaged, in order to reduce the pain of the patient and ensure that the patient can live a normal life in the future, the treatment plan of shoulder joint prosthesis replacement is generally adopted. In the collection of a large number of case plans, it was found that a large proportion of shoulder joint treatment patients had damage to the scapula, glenoid and humerus, requiring overall replacement, but the humeral prosthesis and scapular prosthesis in the existing shoulder joint prosthes...
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