Artificial shoulder joint prosthesis made from organic polymer materials

Abstract

The invention relates to an artificial shoulder joint prosthesis made from organic polymer materials. The artificial shoulder joint prosthesis made from the organic polymer materials comprises a ball head and a humerus handle. The inner surface of the ball head is concave. The inner surface of the ball head is connected with the humerus handle. The ball head is placed in the acetabular fossa of a human body in use. The outer surface of the ball head is directly matched with human body joint cartilage. The ball head is composed of polyether ether ketone or derivatives of the polyether ether ether ketone, so that a half shoulder joint prosthesis is formed. On the basis, the artificial shoulder joint prosthesis structurally further comprises a shoulder joint cavity prosthesis body and an acetabular cup, and the full shoulder joint prosthesis and a reverse shoulder joint prosthesis are formed according to a matching mode. Inner plant parts of the prosthesis are composed of the high polymer materials, and the allergic and toxic problem possibly caused by metal corrosion and metal is reduced. The elastic modulus of PEEK materials is matched with natural bones, and the stress shielding problem is relieved. The prosthesis relieves abrasion to the joint cartilage due to the sliding friction face of the prosthesis. All the inner plant parts in the artificial shoulder joint prosthesis do not interfere with nuclear magnetic resonance imaging.

Description

technical field [0001] The invention relates to a medical rehabilitation device, more specifically, to an organic polymer material artificial shoulder joint prosthesis. Background technique [0002] Artificial shoulder arthroplasty has been widely used since it was applied clinically in the 1950s (KruegerFJ.Avitalliumreplicaarthroplastyontheshoulder; casereportofasepticnecrosisoftheproximalendofthehumerus.Surgery1951; 30:1005-11). At present, the reverse shoulder joint is also widely used (IntJShoulderSurg. 2015Jan-Mar; 9(1): 24-31. doi: 10.4103 / 0973-6042.150226. Reverseshoulderarthroplasty. Part 1: Systematic review of clinical and functional outcomes. SamitierG, Alentorn-GeliE, TorrensC, WrightTW). The material of the implant is basically composed of cobalt-chromium-molybdenum (CoCrMo) alloy and ultra-high molecular weight polyethylene (UHMWPE) to form a sliding surface. [0003] There are unsatisfactory clinical problems in the application of metal materials in shoulder ...

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Problems solved by technology

First, metal materials inevitably corrode in the human body, releasing Co, Cr, Mo, Ni plasma, excessive metal ion release will produce toxicity (MorwoodMP, GarriguesGE.JShoulderElbowSurg.2015Jul; 24(7):1156-1164 .doi:10.1016 / j.jse.2015.01.015.Epub2015Mar20.Shoulderarthroplastyinthepatientwithmetalhypersensitivity)

Second, the high elastic modulus of metal materials leads to the stress shielding problem of natural bone (PanegrossiG, CerettiM, PapaliaM, CasellaF, FavettiF, FalezF. (2014) Bone loss management into total talk neerevision surgery. Int Orthop. 2014Feb; 38 (2): 419-27.); Third, CoCrMo alloys contain a small amount of nickel, which causes allergic reactions in some patients; fourth, metal materials, especially CoCrMo, seriously affect nuclear magnetic resonance (MRI) imaging (BachschmidtTJ, SutterR, JakobPM, PfirrmannCW, NittkaM. (2014) Kneeimplantimagingat3Teslausinghigh- bandwidthradiofrequencypulses.JMagnResonImaging.2014Aug23.doi:10.1002 / jmri.24729.)

[0004] Therefore, so far, clinically applied shoulder joint prostheses are basically all metal materials, especially CoCrMo alloys, but the above-mentioned metal materials have hindered a wide range of clinical applications due to a series of shortcomings.

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