WO2017004741A1 - 一种人工髋关节臼杯 - Google Patents

一种人工髋关节臼杯 Download PDF

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Publication number
WO2017004741A1
WO2017004741A1 PCT/CN2015/000727 CN2015000727W WO2017004741A1 WO 2017004741 A1 WO2017004741 A1 WO 2017004741A1 CN 2015000727 W CN2015000727 W CN 2015000727W WO 2017004741 A1 WO2017004741 A1 WO 2017004741A1
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hip joint
artificial hip
cup
joint cup
inner layer
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PCT/CN2015/000727
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English (en)
French (fr)
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朱健
徐龙伟
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江苏奥康尼医疗科技发展有限公司
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Publication of WO2017004741A1 publication Critical patent/WO2017004741A1/zh

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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/32Joints for the hip
    • A61F2/34Acetabular cups

Definitions

  • the present invention relates to a medical rehabilitation device, and more particularly to an artificial hip joint cup.
  • Artificial hip arthroplasty is one of the major medical inventions that have been widely used clinically since the 1960s.
  • a major part of the artificial joint prosthesis is the articular cup.
  • the fixation of the outer cup and the pelvis of the joint cup not only affects the stability of the joint, but also affects the transmission of joint loads, stress barrier and long-term clinical effects.
  • the inner surface of the joint cup directly combined with the femoral head to form the sliding surface of the hip joint affects the movement of the joint and causes adverse biological effects due to friction, wear and the like.
  • the design of modern artificial hip cups can be roughly divided into two categories. The first type is single type, generally fixed with bone cement.
  • the most typical one is Charnley hip cup system (Hartofilakidis GC, Lampropoulou-Adamidou KI, Stathopoulos IP). Vlamis JA.The Outcome of 241Charnley Total Hip Arthroplasties Performed by One Surgeon 30to 40Years Ago.J Arthroplasty.2015Apr 24.pii:S0883-5403(15)00297-1.doi:10.1016/j.arth.2015.04.018.[ Epub ahead of print]).
  • the second type is a combined hip cup system, which is mainly composed of a metal outer cup and a cup inner lining, and is generally fixed by a biotype (Ries MD. Review of the evolution of the cementless acetabular cup.
  • the design of the first type of cup has the advantages of low cost and long-term clinical effect, but it is not conducive to the doctor's choice in different patients.
  • the second can solve the first clinical use problem, but it brings other clinical problems, including the release of metal ions, stress barrier, fretting wear of the outer cup and the liner (Agne MT, Underwood RJ, Kocagoz SB, MacDonald DW, Day JS, Parlegi J, Kraay MJ, Mont MA, Klein GR, Cates HE, Kurtz SM.
  • the invention firstly provides the advantages of providing a single cup cup combination and the advantages of adjusting the inner lining in the combined articular cup operation and overcoming the corrosion and wear of the metal interface.
  • the shortcomings of the program are the advantages of providing a single cup cup combination and the advantages of adjusting the inner lining in the combined articular cup operation and overcoming the corrosion and wear of the metal interface.
  • an object of the present invention to provide an artificial hip joint cup.
  • An artificial hip joint cup is a unitary artificial hip cup, the artificial hip cup has a concave semi-circular shape, including an outer layer and an inner layer;
  • the inner layer is composed of polyetheretherketone or a derivative thereof; the outer layer and the inner layer are fixed in a unitary structure.
  • the inner layer surface is used directly in conjunction with a femoral head composed of any one of polyetheretherketone or a derivative thereof, a metal or alloy thereof, ultrahigh molecular weight polyethylene, and ceramic.
  • An artificial hip joint cup is a composite artificial hip joint cup, and the artificial hip joint cup has a concave semi-arc shape, including an outer layer, an inner layer and a cup inner liner;
  • the inner layer surface is a standard spherical structure;
  • the outer layer and the inner layer are each composed of polyetheretherketone or a derivative thereof, and the outer layer is fixed with the inner layer into a unitary structure; the inner layer passes through the bone
  • the lining of the cup is fixed by cement.
  • cup liner is composed of any one of ultra high molecular weight polyethylene, cobalt chromium molybdenum alloy and ceramic.
  • An artificial hip joint cup is a combined artificial hip cup, the artificial hip cup has a concave semi-arc shape, including an outer layer, an inner layer and a cup inner lining.
  • the inner layer surface is a non-standard spherical structure; the outer layer is composed of polyetheretherketone or a derivative thereof, and the inner layer is composed of polyetheretherketone or a derivative thereof or other biomaterial having good friction properties.
  • the outer layer is fixed to the inner layer in a unitary structure; the inner layer is assembled with the cup inner liner.
  • cup liner is composed of any one of ultra high molecular weight polyethylene, cobalt chromium molybdenum alloy and ceramic.
  • the biological material comprises one or more of ultra high molecular weight polyethylene, cobalt chromium molybdenum alloy, and bioceramic.
  • the outer surface may be fixed by screws and pelvis or directly fixed to the pelvis with bone cement or by surface treatment with hydroxyapatite or other bio-coating or combination suitable for bone ingrowing.
  • the porous metal and pelvis form a biotype fixation.
  • edge portion of the artificial hip cup includes a reinforcing portion.
  • the reinforcing portion is a high elastic modulus metal ring;
  • the metal ring is made of a CoCrMo alloy, a titanium alloy or a stainless steel.
  • the artificial hip joint cup provided by the present invention can be used alone or in combination with a composite or combined hip cup, which is highly selective.
  • the combination of the inner layer and the cup liner can reduce stress concentration, thereby reducing the risk of fretting wear and lining breakage or A friction pair is formed directly on the outer surface of the femoral head.
  • the edge portion of the acetabular cup has a reinforcing portion, and the top elastic modulus is lower to be closer to the human bone, after the operation, after the acetabular cup is fixed to the human body, the top elastic modulus is lower and conforms to the human bone.
  • the acetabular cup edge has a high modulus of elasticity, and the acetabular cup during surgery and use is stronger and less prone to deformation.
  • the PEEK inner layer of the artificial hip joint cup provided by the invention has corrosion resistance and micro-motion resistance The advantage of wear and tear, so it can avoid the release of metal ions and particles that harm the human body.
  • 1a is a schematic structural view of a one-piece artificial hip joint cup with a screw hole provided by the present invention
  • 1b is a schematic structural view of a one-piece artificial hip joint cup without a screw hole provided by the present invention
  • FIG. 2a is a schematic structural view of a composite artificial hip joint cup with a screw hole provided by the present invention
  • FIG. 2b is a schematic structural view of a composite artificial hip joint cup without a screw hole provided by the present invention
  • 3a is a schematic structural view of a combined artificial hip joint cup with a screw hole provided by the present invention.
  • Fig. 3b is a schematic view showing the structure of a combined artificial hip joint cup without a screw hole provided by the present invention.
  • the present invention provides a one-piece artificial hip joint cup having a concave semi-circular shape including an outer layer 1 and an inner layer 2; the outer layer 1 and the inner layer 2 are each composed of a polyether The ether ketone or a derivative thereof is composed; the outer layer 1 and the inner layer 2 are fixed in a unitary structure.
  • the surface of the inner layer 2 is directly used in combination with the femoral head, and the femoral head is composed of polyetheretherketone (PEEK) or a derivative thereof, a metal or an alloy thereof, an ultrahigh molecular weight polyethylene and a ceramic. Any of a variety of materials in porcelain.
  • PEEK polyetheretherketone
  • the outer layer 1 may have a screw hole 6 on its surface and fixed to the pelvis by screws.
  • the surface of the outer layer 1 may also have no screw holes 6, and the bone cement is directly fixed to the pelvis.
  • the surface of the outer layer 1 may also be formed by surface treatment with hydroxyapatite (HA) or other bio-coating which is beneficial to bone ingrowth or combined with porous metal and pelvis which have good biocompatibility. Biotype is fixed.
  • HA hydroxyapatite
  • the edge portion of the artificial hip cup contains the reinforcing portion 3.
  • the reinforcing portion 3 may be a high elastic modulus metal ring, the material of the metal ring is CoCrMo alloy, titanium alloy or stainless steel, and the metal ring may be coated as an insert by peek and its derivative, and is completed by one injection.
  • the invention provides an artificial hip joint cup, the artificial hip joint cup is a composite artificial hip joint cup, and the artificial hip joint cup has a concave semi-arc shape, including the outer layer 1.
  • the inner layer 2 secures the cup liner 4 by the bone cement 5.
  • the outer layer 1 may have a screw hole 6 on its surface and fixed to the pelvis by screws.
  • the surface of the outer layer 1 may also be provided with no screw holes 6, and the bone cement is directly fixed to the pelvis.
  • the surface of the outer layer 1 may also be formed by surface treatment with hydroxyapatite (HA) or other bio-coating which is beneficial to bone ingrowth or combined with porous metal and pelvis which have good biocompatibility. Biotype is fixed.
  • HA hydroxyapatite
  • the edge portion of the artificial hip cup contains the reinforcing portion 3.
  • the reinforcing portion 3 may be a high elastic modulus metal ring, the material of the metal ring is CoCrMo alloy, titanium alloy or stainless steel, and the metal ring may be coated as an insert by peek and its derivative, and is completed by one injection.
  • an artificial hip joint cup As shown in Figures 3a and 3b, an artificial hip joint cup, the artificial hip cup is a combined artificial hip cup, and the artificial hip cup has a concave semi-circular shape, including the outer layer 1, the inner layer 2, and The cup liner 4, the inner layer 2 has a non-standard spherical structure; the outer layer 1 is composed of polyetheretherketone or a derivative thereof, and the inner layer 2 is composed of polyetheretherketone or a derivative thereof or other organism having good friction properties.
  • the material is constructed such that the outer layer 1 and the inner layer 2 are fixed in a unitary structure; the inner layer 2 is combined with the cup inner liner 4.
  • the cup liner 4 is composed of any one of ultra high molecular weight polyethylene, cobalt chromium molybdenum alloy and ceramic.
  • the biological material includes one or more of ultra high molecular weight polyethylene, cobalt chromium molybdenum alloy, and bioceramic.
  • the outer layer 1 may have a screw hole 6 on its surface and fixed to the pelvis by screws.
  • the surface of the outer layer 1 may also have no screw holes 6 and be directly fixed to the pelvis with bone cement.
  • the surface of the outer layer 1 may also be formed by surface treatment with hydroxyapatite (HA) or other bio-coating which is beneficial to bone ingrowth or combined with porous metal and pelvis which have good biocompatibility. Biotype is fixed.
  • HA hydroxyapatite
  • the edge portion of the artificial hip cup contains the reinforcing portion 3.
  • the reinforcing portion 3 may be a high elastic modulus metal ring, the material of the metal ring is CoCrMo alloy, titanium alloy or stainless steel, and the metal ring may be coated as an insert by peek and its derivative, and is completed by one injection.
  • the artificial hip joint cup provided by the invention can be used alone or in combination with a composite or combined hip cup, which has strong selectivity.
  • the artificial hip joint cup provided by the present invention forms a composite (shown in Figures 2a and 2b) and a combined (shown in Figures 3a and 3b) hip cups, the inner layer 2 and the cup liner 4
  • the combination reduces stress concentration, thereby reducing the risk of fretting wear and lining breakage or directly forming a friction pair with the external surface of the femoral head.
  • the edge portion of the acetabular cup has the reinforcing portion 3, and the top elastic modulus is lower to be closer to the human bone, after the operation, after the acetabular cup is fixed to the human body, the top elastic modulus is lower and the human bone is better.
  • the acetabular cup edge has a high modulus of elasticity, and the acetabular cup during surgery and use is stronger and is not easily deformed.
  • the PEEK inner layer of the composite artificial hip joint cup provided by the invention has the advantages of corrosion resistance and fretting wear resistance, so that the release of metal ions and particles harmful to the human body can be avoided.

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  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Prostheses (AREA)

Abstract

一种人工髋关节臼杯,其为单体式人工髋关节臼杯,呈内凹型半圆弧状,包括外层(1)和内层(2);该外层(1)和该内层(2)均由聚醚醚酮或其衍生物构成;该外层(1)与该内层(2)固定成一体结构。该人工髋关节臼杯既可单独使用,又可与臼杯内衬(4)形成复合式和组合式人工髋关节臼杯。该人工髋关节臼杯形成复合式和组合式髋关节臼杯时,其内层(2)与臼杯内衬(4)的结合可以降低应力集中,从而减少微动磨损及内衬(4)破损的风险或者直接和股骨头假体外表面形成摩擦副。该人工髋关节臼杯的PEEK内层(2)具有耐腐蚀、耐微动磨损的优势,因此可以避免危害人体的金属离子和微粒的释放。

Description

一种人工髋关节臼杯 技术领域
本发明涉及一种医疗康复器械,更具体地,涉及一种人工髋关节臼杯。
背景技术
人工髋关节置换术是自20世纪60年代以来得到广泛临床应用的重大医学发明之一。人工关节假体的一个主要部分是关节臼杯。关节臼杯的外部和骨盆的固定不仅影响关节的稳定性,还影响关节载荷的传递,应力阻挡及长期的临床效果。而关节臼杯的内表面直接和股骨头相结合形成髋关节的滑动面影响关节的运动和因为摩擦,磨损等带来不良生物学效应。现代人工髋关节臼杯的设计大致分为两类,第一种为单体式的,一般采用骨水泥固定,最典型的是Charnley髋关节臼杯系统(Hartofilakidis GC,Lampropoulou-Adamidou KI,Stathopoulos IP,Vlamis JA.The Outcome of 241Charnley Total Hip Arthroplasties Performed by One Surgeon 30to 40Years Ago.J Arthroplasty.2015Apr 24.pii:S0883-5403(15)00297-1.doi:10.1016/j.arth.2015.04.018.[Epub ahead of print])。第二种为组合式的髋关节臼杯系统,主要由一个金属外杯和一个臼杯内衬组成,一般通过生物型固定(Ries MD.Review of the evolution of the cementless acetabular cup.Orthopedics.2008Dec;31(12Suppl 2).pii:orthosupersite.com/view.asp?rID=37178.Review)。第一种臼杯的设计具有成本低和长期临床效果不差等优点,但不利于医生在对不同病人临床中的选择。第二种可以解决第一种的临床使用问题,但随之带来其它临床问题,包括金属离子的释放,应力阻挡,外杯与内衬的微动磨损问题等(Agne MT,Underwood RJ,Kocagoz SB,MacDonald DW,Day JS,Parvizi J, Kraay MJ,Mont MA,Klein GR,Cates HE,Kurtz SM.Is there material loss at the backside taper in modular CoCr acetabular liners?Clin Orthop Relat Res.2015Jan;473(1):275-85.doi:10.1007/s11999-014-3982-2.Epub2014Oct 16).
因此,一种能克服上述缺点的新型和理想的人工髋关节臼杯是期望的。
发明内容
本发明在基于以上两种髋关节臼杯设计的基础上首次提出既能提供单体式臼杯组合式的优点和组合式关节臼杯手术中调节内衬的优点又能克服金属界面腐蚀与磨损缺点的方案。
针对上述解决的技术问题,本发明的目的是提供一种人工髋关节臼杯。
为了实现上述发明,本发明采用如下技术方案:
一种人工髋关节臼杯,所述人工髋关节臼杯为单体式人工髋关节臼杯,所述人工髋关节臼杯呈内凹型半圆弧状,包括外层和内层;所述外层和所述内层均由聚醚醚酮或其衍生物构成;所述外层与所述内层固定成一体结构。
进一步地,所述内层表面直接与股骨头配合使用,所述股骨头由聚醚醚酮或其衍生物、金属或其合金、超高分子量聚乙烯和陶瓷中的任意一种材料构成。
一种人工髋关节臼杯,所述人工髋关节臼杯为复合式人工髋关节臼杯,所述人工髋关节臼杯呈内凹型半圆弧状,包括外层、内层和臼杯内衬;所述内层表面为标准球形结构;所述外层和所述内层均由聚醚醚酮或其衍生物构成,所述外层与所述内层固定成一体结构;所述内层通过骨水泥固定所述臼杯内衬。
进一步地,所述臼杯内衬由超高分子量聚乙烯,钴铬钼合金和陶瓷中的任意一种材料构成。
一种人工髋关节臼杯,所述人工髋关节臼杯为组合式人工髋关节臼杯,所述人工髋关节臼杯呈内凹型半圆弧状,包括外层、内层和臼杯内衬,所述内层表面为非标准球形结构;所述外层由聚醚醚酮或其衍生物构成,所述内层由聚醚醚酮或其衍生物或其它具有良好摩擦性能的生物材料构成,所述外层与所述内层固定成一体结构;所述内层与所述臼杯内衬组配。
进一步地,所述臼杯内衬由超高分子量聚乙烯,钴铬钼合金和陶瓷中的任意一种材料构成。
进一步地,所述生物材料包括超高分子量聚乙烯、钴铬钼合金和生物陶瓷中的一种或几种。
进一步地,所述外层表面可以用螺钉与骨盆固定或用骨水泥直接与骨盆固定或通过表面处理用羟基磷灰石或者其它有利于骨长入的生物涂层或者结合具有良好生物相容性的多孔金属和骨盆形成生物型固定。
进一步地,所述人工髋关节臼杯的边缘部包含加强部。
进一步地,所述加强部为高弹性模量金属环;所述金属环的材质为CoCrMo合金、钛合金或不锈钢。
由于采用以上技术方案,本发明的有益效果为:
1)本发明提供的人工髋关节臼杯既可以单独使用,又可以形成复合式或组合式髋关节臼杯使用,其选择性强。
2)本发明提供的人工髋关节臼杯形成复合式和组合式髋关节臼杯时,其内层与臼杯内衬的结合可以降低应力集中,从而减少微动磨损及内衬破损的风险或者直接和股骨头假体外表面形成摩擦副。特别是由于髋臼杯边缘部具有加强部,而顶部弹性模量较低使其更接近人体骨,手术后,髋臼杯与人体固定后,顶部弹性模量较低更贴合人体骨,而髋臼杯边缘具有较高的弹性模量,在手术中及使用中的髋臼杯更坚固,不容易变形。
3)本发明提供的人工髋关节臼杯的PEEK内层具有耐腐蚀、耐微动 磨损的优势,因此可以避免危害人体的金属离子和微粒的释放。
附图说明
图1a为本发明提供的带有螺钉孔的单体式人工髋关节臼杯的结构示意图;
图1b为本发明提供的不带有螺钉孔的单体式人工髋关节臼杯的结构示意图;
图2a为本发明提供的带有螺钉孔的复合式人工髋关节臼杯的结构示意图;
图2b为本发明提供的不带有螺钉孔的复合式人工髋关节臼杯的结构示意图;
图3a是本发明提供的带有螺钉孔的组合式人工髋关节臼杯的结构示意图
图3b是本发明提供的不带有螺钉孔的组合式人工髋关节臼杯的结构示意图。
附图标记说明
1外层、2内层、3加强部、4臼杯内衬、5骨水泥、6螺钉孔。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白,下面结合附图及实施例对本发明作进一步详细说明。应当理解,此处所描述的具体实施例仅用以解释本发明,并不用于限定本发明。
如图1a和1b所示,本发明提供的一种单体式人工髋关节臼杯,其呈内凹型半圆弧状,包括外层1和内层2;外层1和内层2均由聚醚醚酮或其衍生物构成;外层1与内层2固定成一体结构。
在上述技术方案中,内层2表面直接与股骨头配合使用,股骨头由聚醚醚酮(PEEK)或其衍生物、金属或其合金、超高分子量聚乙烯和陶 瓷中的任意一种材料构成。
在上述技术方案中,如图1a所示,外层1表面可以带有螺钉孔6,用螺钉与骨盆固定。
在上述技术方案中,如图1b所示,外层1表面也可以不带有螺钉孔6,用骨水泥直接与骨盆固定。
在上述技术方案中,所述外层1表面也可以通过表面处理用羟基磷灰石(HA)或者其它有利于骨长入的生物涂层或者结合具有良好生物相容性的多孔金属和骨盆形成生物型固定。
在上述技术方案中,人工髋关节臼杯的边缘部包含加强部3,手术后,髋臼杯与人体固定后,臼杯顶部弹性模量较低更贴合人体骨,而髋臼杯边缘具有较高的弹性模量,在手术中及使用中的髋臼杯更坚固,不容易变形。
在上述技术方案中,加强部3可以是高弹性模量金属环,金属环的材质为CoCrMo合金、钛合金或不锈钢,金属环可以作为嵌入物被peek及其衍生物包覆,一次注塑完成。
如图2a和2b所示,本发明提供的一种人工髋关节臼杯,人工髋关节臼杯为复合式人工髋关节臼杯,人工髋关节臼杯呈内凹型半圆弧状,包括外层1、内层2和臼杯内衬4;内层2表面为标准球形结构;外层1和内层2均由聚醚醚酮或其衍生物构成,外层1与内层2固定成一体结构;内层2通过骨水泥5固定臼杯内衬4。
在上述技术方案中,如图2a所示,外层1表面可以带有螺钉孔6,用螺钉与骨盆固定。
在上述技术方案中,如图2b所示,外层1表面也可以不带有螺钉孔6,用骨水泥直接与骨盆固定。
在上述技术方案中,所述外层1表面也可以通过表面处理用羟基磷灰石(HA)或者其它有利于骨长入的生物涂层或者结合具有良好生物相容性的多孔金属和骨盆形成生物型固定。
在上述技术方案中,人工髋关节臼杯的边缘部包含加强部3,手术后,髋臼杯与人体固定后,臼杯顶部弹性模量较低更贴合人体骨,而髋臼杯边缘具有较高的弹性模量,在手术中及使用中的髋臼杯更坚固,不容易变形。
在上述技术方案中,加强部3可以是高弹性模量金属环,金属环的材质为CoCrMo合金、钛合金或不锈钢,金属环可以作为嵌入物被peek及其衍生物包覆,一次注塑完成。
如图3a和3b所示,一种人工髋关节臼杯,人工髋关节臼杯为组合式人工髋关节臼杯,人工髋关节臼杯呈内凹型半圆弧状,包括外层1、内层2和臼杯内衬4,内层2表面为非标准球形结构;外层1由聚醚醚酮或其衍生物构成,内层2由聚醚醚酮或其衍生物或其它具有良好摩擦性能的生物材料构成,外层1与所述内层2固定成一体结构;内层2与臼杯内衬4组配。
在上述技术方案中,臼杯内衬4由超高分子量聚乙烯,钴铬钼合金和陶瓷中的任意一种材料构成。
在上述技术方案中,生物材料包括超高分子量聚乙烯、钴铬钼合金和生物陶瓷中的一种或几种。
在上述技术方案中,如图3a所示,外层1表面可以带有螺钉孔6,用螺钉与骨盆固定。
在上述技术方案中,如图3b所示,外层1表面也可以不带有螺钉孔6,用骨水泥直接与骨盆固定。
在上述技术方案中,所述外层1表面也可以通过表面处理用羟基磷灰石(HA)或者其它有利于骨长入的生物涂层或者结合具有良好生物相容性的多孔金属和骨盆形成生物型固定。
在上述技术方案中,人工髋关节臼杯的边缘部包含加强部3,手术后,髋臼杯与人体固定后,臼杯顶部弹性模量较低更贴合人体骨,而髋臼杯边缘具有较高的弹性模量,在手术中及使用中的髋臼杯更坚固,不容易变形。
在上述技术方案中,加强部3可以是高弹性模量金属环,金属环的材质为CoCrMo合金、钛合金或不锈钢,金属环可以作为嵌入物被peek及其衍生物包覆,一次注塑完成。
本发明提供的人工髋关节臼杯既可以单独使用,又可以形成复合式或组合式髋关节臼杯使用,其选择性强。
本发明提供的人工髋关节臼杯形成复合式(图2a和图2b所示)和组合式(图3a和图3b所示)髋关节臼杯时,其内层2与臼杯内衬4的结合可以降低应力集中,从而减少微动磨损及内衬破损的风险或者直接和股骨头假体外表面形成摩擦副。特别是由于髋臼杯边缘部具有加强部3,而顶部弹性模量较低使其更接近人体骨,手术后,髋臼杯与人体固定后,顶部弹性模量较低更贴合人体骨,而髋臼杯边缘具有较高的弹性模量,在手术中及使用中的髋臼杯更坚固,不容易变形。
本发明提供的复合式人工髋关节臼杯的PEEK内层具有耐腐蚀、耐微动磨损的优势,因此可以避免危害人体的金属离子和微粒的释放。
以上所述仅为本发明的较佳实施例,并非用来限定本发明的实施范围;如果不脱离本发明的精神和范围,对本发明进行修改或者等同替换,均应涵盖在本发明权利要求的保护范围当中。

Claims (10)

  1. 一种人工髋关节臼杯,其特征在于,所述人工髋关节臼杯为单体式人工髋关节臼杯,所述人工髋关节臼杯呈内凹型半圆弧状,包括外层和内层;所述外层和所述内层均由聚醚醚酮或其衍生物构成;所述外层与所述内层固定成一体结构。
  2. 根据权利要求1所述的人工髋关节臼杯,其特征在于,所述内层表面直接与股骨头配合使用,所述股骨头由聚醚醚酮或其衍生物、金属或其合金、超高分子量聚乙烯和陶瓷中的任意一种材料构成。
  3. 一种人工髋关节臼杯,其特征在于,所述人工髋关节臼杯为复合式人工髋关节臼杯,所述人工髋关节臼杯呈内凹型半圆弧状,包括外层、内层和臼杯内衬;所述内层表面为标准球形结构;所述外层和所述内层均由聚醚醚酮或其衍生物构成,所述外层与所述内层固定成一体结构;所述内层通过骨水泥固定所述臼杯内衬。
  4. 根据权利要求3所述的人工髋关节臼杯,其特征在于,所述臼杯内衬由超高分子量聚乙烯,钴铬钼合金和陶瓷中的任意一种材料构成。
  5. 一种人工髋关节臼杯,其特征在于,所述人工髋关节臼杯为组合式人工髋关节臼杯,所述人工髋关节臼杯呈内凹型半圆弧状,包括外层、内层和臼杯内衬,所述内层表面为非标准球形结构;所述外层由聚醚醚酮或其衍生物构成,所述内层由聚醚醚酮或其衍生物或其它具有良好摩擦性能的生物材料构成,所述外层与所述内层固定成一体结构;所述内层与所述臼杯内衬组配。
  6. 根据权利要求5所述的人工髋关节臼杯,其特征在于,所述臼杯内衬由超高分子量聚乙烯,钴铬钼合金和陶瓷中的任意一种材料构成。
  7. 根据权利要求5所述的人工髋关节臼杯,其特征在于,所述生物材料包括超高分子量聚乙烯、钴铬钼合金和生物陶瓷中的一种或几种。
  8. 根据权利要求1或3或5所述的人工髋关节臼杯,其特征在于,所述外层表面用螺钉与骨盆固定或用骨水泥直接与骨盆固定或通过表面 处理用羟基磷灰石或者其它有利于骨长入的生物涂层或者结合具有良好生物相容性的多孔金属和骨盆形成生物型固定。
  9. 根据权利要求1或3或5所述的人工髋关节臼杯,其特征在于,所述人工髋关节臼杯的边缘部包含加强部。
  10. 根据权利要求9所述的人工髋关节臼杯,其特征在于,所述加强部为高弹性模量金属环;所述金属环的材质为CoCrMo合金、钛合金或不锈钢。
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