A combined all-organic polymer material artificial temporomandibular joint

Abstract

A combined all-organic macromolecule material artificial temporomandibular joint, including polyetheretherketone (PEEK) or its derivatives temporal bone plate, condylar head and its fixed bone plate, and ultra-high molecular weight polyethylene (UHMWPE) Temporal bone lining, in which the fixed bone plate of the temporal bone tray matches the upper part of the temporal bone lining, and the lower part of the temporal bone lining has a concave U-shaped spherical surface and is connected with the condylar head and its fixed bone plate; the sliding surface of the condylar head on the temporal bone lining has a Cushioning, the fixed surface of the temporal bone support plate and the temporal bone lining can be slightly moved, and the two match. The main parts of all implant parts in the present invention are composed of polymer materials, which reduces the allergies and toxicity problems that may be caused by metals and their corrosion; the elastic modulus of PEEK matches the natural bone, which reduces the problem of stress shielding; the sliding of PEEK to UHMWPE The micro-movement combination of the surface and the fixed surface greatly reduces the wear problem, and at the same time, the reinforcement and development parts are added to further improve the practicability.

Description

technical field [0001] The invention relates to a medical implant, in particular to a combined all-organic polymer material artificial temporomandibular joint. Background technique [0002] The temporomandibular joint is a complex joint consisting of hinged and sliding movements (Sader R, Leiggener C, Saldamli B, Jürgens P, Landes C, Zeilhofer HF: O.635A new innovative solution for total TMJ replacement. J Craniomaxillofac Surg 36 (Suppl.1(0)):S159,2008), and it can open and close up to 2000 times per day (Guarda-Nardini L, Manfredini D, Ferronato G: Temporomandibular joint total replacement prosthesis: current knowledge and considerations for the future. Int J Oral Maxillofac Surg 37(2):103e110, 2008). According to epidemiological studies, disorders caused by temporomandibular joints affect as many as 20 to 25% of the population, but only a small number of patients receive treatment (Solberg WK, Woo MW, Houston JB: Prevalence of massiveysfunction in young adults. J Am Dent...

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Problems solved by technology

However, the current temporomandibular joint replacement system, even in the short term, does not have a good clinical effect, accompanied by a high failure rate, such as allergies to materials, etc. (Ramos A, Mesnard M.J Load transfer in TMJin alloplastic total joint replacement for two different mouthapertures.Craniomaxillofac Surg.2014Oct;42(7):1442-9.doi:10.1016 / j.jcms.2014.04.008.Epub 2014May 2)

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