WO2016184293A1 - Acetabular socket of composite artificial hip joint - Google Patents

Acetabular socket of composite artificial hip joint Download PDF

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Publication number
WO2016184293A1
WO2016184293A1 PCT/CN2016/080040 CN2016080040W WO2016184293A1 WO 2016184293 A1 WO2016184293 A1 WO 2016184293A1 CN 2016080040 W CN2016080040 W CN 2016080040W WO 2016184293 A1 WO2016184293 A1 WO 2016184293A1
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inner layer
artificial hip
hip joint
composite artificial
alloy
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PCT/CN2016/080040
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French (fr)
Chinese (zh)
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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 WO2016184293A1 publication Critical patent/WO2016184293A1/en

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS 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
    • A61F2/00—Filters 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
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/32—Joints for the hip
    • A61F2/34—Acetabular cups
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/02—Inorganic materials
    • A61L27/04—Metals or alloys
    • A61L27/06—Titanium or titanium alloys
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/28—Materials for coating prostheses
    • A61L27/30—Inorganic materials
    • A61L27/32—Phosphorus-containing materials, e.g. apatite

Definitions

  • the present invention relates to a medical rehabilitation device, and more particularly to a composite artificial hip joint cup.
  • the acetabular cup prosthesis is widely used in total hip arthroplasty.
  • the current uniform method is to selectively use bone screws in the safe area, which will increase the stability of the initial prosthesis and promote the bone growth of the prosthesis (Tabata) T, Kaku N, Hara K, Tsumura H.
  • Initial stability of cementless acetabular cups press-fit and screw fixation interaction-an in vitro biomechanical study. Eur J Orthop Surg Traumatol. 2015Apr; 25(3): 497-502.doi :10.1007/s00590-014-1571-4.Epub 2014Nov 25).
  • the ideal acetabular cup should It is that the top of the cup has a lower modulus of elasticity that is closer to the human bone, and the edge of the cup should have a sufficiently high modulus of elasticity to minimize deformation of the cup after insertion. And this is the ideal acetabular cup that is urgently needed in the clinic.
  • the above-mentioned joint lining is generally used for fixation with bone, and the other part of the lining is formed of a wear-resistant material, and a sliding friction pad is formed between the femoral head.
  • the choice of friction pads is diverse, including ultra high molecular weight polyethylene (UHMWPE), ceramic materials and CoCrMo alloys.
  • Ultra high molecular weight polyethylene (UHMWPE) Ultra high molecular weight polyethylene
  • Ceramic materials and CoCrMo alloys.
  • Modern acetabular cups are generally designed to accommodate both polyethylene liners and ceramic or CoCrMo liners. The matching of the internal structure of the acetabular cup lining to the external structure, size and shape of the friction pad is therefore essential.
  • PEEK polyetheretherketone
  • a composite artificial hip joint cup has a concave semicircular arc a shape comprising an outer layer and an inner layer; the outer layer having a screw hole, the outer layer being composed of a biocompatible material; the inner layer being composed of a polyether ether ketone or a derivative thereof, the inner layer
  • the outer layer is fixed in a unitary structure; the screw holes are covered by the inner layer.
  • the biocompatible material is one or more of a cobalt chromium molybdenum alloy, a titanium or titanium alloy, a tantalum or niobium alloy, a magnesium or magnesium alloy, a stainless steel, and a zirconium-niobium alloy.
  • the outer layer is a porous structure or the outer surface of the outer layer is coated with a coating that facilitates bone ingrowth.
  • the coating is one or more of hydroxyapatite, ruthenium or osmium alloy, magnesium or magnesium alloy, and zirconium-lanthanum alloy.
  • the number of the screw holes is one or more; and the inner layer at a position relative to the screw hole is provided with a mark for convenient identification and drilling positioning.
  • the indicia is a concave structure or a color mark.
  • 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 CoCrMo alloy or stainless steel.
  • the inner surface of the inner layer is a standard spherical structure, and the inner layer and the acetabular cup inner liner constitute a sliding friction surface.
  • the inner surface of the inner layer is a non-standard spherical structure, and the inner layer and the acetabular cup inner liner are assembled and fixed structures.
  • the composite artificial hip joint cup provided by the invention solves the problem of osteolysis caused by the vacant screw hole due to the opening of the screw hole as needed during the operation, and the PEEK layer in the screw hole plays a sealing role after the screw is fixed.
  • the combination of the PEEK inner layer of the composite artificial hip cup and the outer surface of different cup liners provided by the present invention can reduce stress concentration, thereby reducing the risk of fretting wear and liner damage or directly with the femoral head prosthesis
  • the outer surface forms a friction pair.
  • the edge of the acetabular cup has a reinforcing portion, and the top elastic modulus is lower to make it closer to the human bone, after the operation, the acetabular cup After being fixed by the screw and the human body, the top elastic modulus is lower to fit the human bone, and the acetabular cup edge has a higher elastic modulus, 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.
  • FIG. 1 is a schematic structural view of a composite artificial hip joint cup provided by the present invention
  • FIG. 2 is a schematic structural view showing a sliding friction surface of a PEEK inner layer and an acetabular cup inner liner of a composite artificial hip joint cup provided by the present invention
  • FIG 3 is a schematic view showing the structure of a PEEK inner layer and an acetabular cup inner liner forming a combined fixing structure of the composite artificial hip joint cup provided by the present invention.
  • the composite artificial hip joint cup provided by the present invention has a concave semi-circular shape, including an outer layer 1 and an inner layer 3; wherein the outer layer 1 has a screw hole 2, and the outer layer 1 is biocompatible.
  • the inner layer 3 is composed of a polyetheretherketone or a derivative thereof, and the inner layer 3 and the outer layer 1 are fixed in a unitary structure; the screw holes 2 are covered by the inner layer.
  • the biocompatible material is one or more of a cobalt chromium molybdenum alloy, a titanium or titanium alloy, a tantalum or niobium alloy, a magnesium or magnesium alloy, a stainless steel, and a zirconium-niobium alloy.
  • the outer layer 1 is a porous structure or the outer surface of the outer layer 1 is coated with a coating for facilitating bone ingrowth; the coating is hydroxyapatite, yttrium or lanthanum alloy, magnesium or magnesium alloy and zirconium lanthanum One or more of the alloys.
  • the number of the screw holes 2 is one or more; at the inner layer 3 with respect to the position of the screw hole 2, a mark for easy identification and drilling positioning is made; again, as shown in FIG. 1, the mark is concave. Structure 7.
  • the mark may also be a color mark.
  • the reinforcing portion 4 of the artificial hip joint cup is a high elastic modulus metal ring; the metal ring is made of CoCrMo alloy or stainless steel.
  • the PEEK inner layer 3 of the composite artificial hip joint cup provided by the present invention forms a sliding friction surface with the acetabular cup liner 5.
  • the PEEK inner layer 3 is a standard spherical structure
  • the PEEK inner layer 3 and the outer surface of the acetabular cup liner 5 constitute a sliding friction structure, which is a spherical first joint surface
  • the inner surface of the acetabular cup liner 5 is
  • the outer surface of the artificial femoral head 6 constitutes a sliding friction structure and is a spherical second joint surface.
  • the first joint surface and the second joint surface form a double-motion joint surface.
  • the double-joint joint not only increases the activity of the artificial joint, but more importantly, it can select the joint surface with low friction coefficient.
  • the acetabular cup liner 5 is composed of ultra high molecular weight polyethylene (UHMWPE), and the artificial femoral head ball 6 is made of PEEK, CoCrMo alloy or ceramic material.
  • UHMWPE ultra high molecular weight polyethylene
  • the artificial femoral head ball 6 is made of PEEK, CoCrMo alloy or ceramic material.
  • the two articular surfaces form a double sliding connection structure.
  • the PEEK inner layer 3 directly forms a sliding joint surface with the artificial femoral head.
  • the PEEK inner layer 3 of the composite artificial hip joint cup provided by the present invention and the acetabular cup liner 5 form a fixed structure.
  • the PEEK inner layer 3 is of a non-standard spherical structure. Therefore, the contact faces of the PEEK inner layer 3 and the acetabular cup liner 5 cannot slide each other, and the joint surface has only fretting friction.
  • the acetabular cup lining 5 forms a sliding articular surface with the artificial femoral head ball 6.
  • the acetabular cup liner 5 is composed of ultra high molecular weight polyethylene (UHMWPE), and the artificial femoral head ball 6 is made of PEEK, CoCrMo alloy or ceramic material.
  • UHMWPE ultra high molecular weight polyethylene
  • the artificial femoral head ball 6 is made of PEEK, CoCrMo alloy or ceramic material.
  • the invention incorporates the inner layer of PEEK, which greatly reduces the fretting wear between the artificial acetabular cup liner 5 and the metal outer layer, and the PEEK material has the advantage of corrosion resistance, thereby avoiding metal ions and particles harmful to the human body. Release.
  • the combination of the PEEK inner layer 3 (or inner wall) of the composite organic polymer material artificial hip joint cup provided by the present invention and different friction surfaces can reduce stress concentration, thereby reducing the risk of fretting wear and liner damage.

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  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • General Health & Medical Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Inorganic Chemistry (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Dermatology (AREA)
  • Medicinal Chemistry (AREA)
  • Epidemiology (AREA)
  • Vascular Medicine (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Biomedical Technology (AREA)
  • Engineering & Computer Science (AREA)
  • Cardiology (AREA)
  • Prostheses (AREA)
  • Materials For Medical Uses (AREA)

Abstract

An acetabular socket of a composite artificial hip joint is disclosed. The socket has a concave semicircular shape, and comprises an outer layer (1) and an inner layer (3), wherein the outer layer (1) comprises a screw hole (2) formed from a biocompatible material; the inner layer (3) is formed from polyetheretherketone or a high molecular material of a derivative thereof, and fixed to the outer layer (1) to form as an integrated structure; and the screw hole (2) is covered by the inner layer (3). The contact between a surface of the inner layer (3) and an outer surface of each of different acetabular socket liners (5) may reduce a stress concentration, decreasing a risk of fretting wear and damage to the acetabular socket liner (5). In addition, the surface of the inner layer (3) and an outer surface of an artificial femoral head (6) directly form a friction pair, reducing wear of the outer surface of the artificial femoral head (6). The surface of the inner layer (3) has the advantages of being corrosion-resistant and fret-resistant, preventing metal ions and particles of metal prosthesis from being released and damaging a human body.

Description

一种复合式人工髋关节臼杯Composite artificial hip joint cup 技术领域Technical field
本发明涉及一种医疗康复器械，更具体地，涉及一种复合式人工髋关节臼杯。The present invention relates to a medical rehabilitation device, and more particularly to a composite artificial hip joint cup.
背景技术Background technique
髋臼杯假体广泛应用于全髋关节置换术中。在有骨缺损或骨质欠佳的情况下，目前比较统一的方法是在安全区内选择性地使用骨螺钉，这将能增加初始假体稳定性，进而促进假体的骨长入(Tabata T,Kaku N,Hara K,Tsumura H.Initial stability of cementless acetabular cups:press-fit and screw fixation interaction-an in vitro biomechanical study.Eur J Orthop Surg Traumatol.2015Apr；25(3):497-502.doi:10.1007/s00590-014-1571-4.Epub 2014Nov 25)。但是，空置的螺钉孔帮助输送带微粒的关节液至骨假体界面时会引起骨溶解，同时关节液或者体液在关节力的作用下会冲击骨界面，造成进一步骨溶解(Walter WL,Clabeaux J,Wright TM,Walsh W,Walter WK,Sculco TP.Mechanisms for pumping fluid through cementless acetabular components with holes.J Arthroplasty.2005Dec；20(8):1042-8)。目前已有通过封闭塞或可以开启的金属薄膜以达到封闭空置螺钉的专利，但其存在不宜开启和易产生金属碎屑等严重缺点。近年来，一种新型双动髋臼杯自从上世纪70年代Gilles Bousquest和Andre Rambert(De Martino I,Triantafyllopoulos GK,Sculco PK,Sculco TP,Dual mobility cups in total hip arthroplasty.World J Orthop.2014Jul 18；5(3):180-7.doi:10.5312/wjo.v5.i3.180.eCollection 2014)发明以来重新得到了重视，但是如同其他一体式髋臼杯一样，目前还未有有效的自内部关节面开启螺钉孔的设计方案。这影响了其临床广泛的应用。此外，理想的髋臼杯应 是杯顶部弹性模量较低使其更接近人体骨，而杯边缘应有足够高的弹性模量使置入后杯的变形变得最小。而这正是临床上迫切需要的理想的髋臼杯。The acetabular cup prosthesis is widely used in total hip arthroplasty. In the case of bone defects or poor bone quality, the current uniform method is to selectively use bone screws in the safe area, which will increase the stability of the initial prosthesis and promote the bone growth of the prosthesis (Tabata) T, Kaku N, Hara K, Tsumura H. Initial stability of cementless acetabular cups: press-fit and screw fixation interaction-an in vitro biomechanical study. Eur J Orthop Surg Traumatol. 2015Apr; 25(3): 497-502.doi :10.1007/s00590-014-1571-4.Epub 2014Nov 25). However, vacant screw holes help to transport bone-dispersing joint fluid to the bone prosthesis interface, causing osteolysis, and joint fluid or body fluids can impact the bone interface under joint force, causing further osteolysis (Walter WL, Clabeaux J , WrightTM, Walsh W, Walter WK, Sculco TP. Mechanisms for pumping fluid through cementless acetabular components with holes. J Arthroplasty. 2005 Dec; 20(8): 1042-8). At present, there is a patent for closing a vacant screw by closing a plug or a metal film that can be opened, but it has serious disadvantages such as unsuitable opening and easy generation of metal debris. In recent years, a new type of double-action acetabular cup since the 1970s Gilles Bousquest and Andre Rambert (De Martino I, Triantafyllopoulos GK, Sculco PK, Sculco TP, Dual mobility cups in total hip arthroplasty. World J Orthop. 2014Jul 18; 5(3): 180-7.doi:10.5312/wjo.v5.i3.180.eCollection 2014) has been re-emphasized since its invention, but like other integrated acetabular cups, there is currently no effective internal joint The design of opening the screw hole. This affects its wide range of clinical applications. In addition, the ideal acetabular cup should It is that the top of the cup has a lower modulus of elasticity that is closer to the human bone, and the edge of the cup should have a sufficiently high modulus of elasticity to minimize deformation of the cup after insertion. And this is the ideal acetabular cup that is urgently needed in the clinic.
同时，上述关节外衬一般用于与骨的固定，而另一部分的内衬是由耐磨材料形成的，和股骨头之间形成滑动的摩擦衬垫。在现代髋关节置换术中，摩擦衬垫的选择具有多样性，包括超高分子量聚乙烯(UHMWPE)，陶瓷材料及CoCrMo合金等。现代髋臼杯的设计一般要求既能容纳聚乙烯内衬又能容纳陶瓷或CoCrMo内衬。由此髋臼杯外衬的内部结构与摩擦衬垫的外部结构，尺寸，形状的匹配至关重要。如果匹配公差过大，那么会导致接触表面之间可能产生应力集中及微动，从而带来腐蚀，磨损的风险(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.Epub 2014Oct 16)。在摩擦衬垫为陶瓷的情况下，微动和应力集中又可能增加衬垫的破碎的风险。At the same time, the above-mentioned joint lining is generally used for fixation with bone, and the other part of the lining is formed of a wear-resistant material, and a sliding friction pad is formed between the femoral head. In modern hip replacement, the choice of friction pads is diverse, including ultra high molecular weight polyethylene (UHMWPE), ceramic materials and CoCrMo alloys. Modern acetabular cups are generally designed to accommodate both polyethylene liners and ceramic or CoCrMo liners. The matching of the internal structure of the acetabular cup lining to the external structure, size and shape of the friction pad is therefore essential. If the matching tolerance is too large, stress concentration and micro-motion may occur between the contact surfaces, which may cause corrosion and wear (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.Epub 2014Oct 16). In the case where the friction pad is ceramic, fretting and stress concentration may increase the risk of breakage of the pad.
近年来，聚醚醚酮(PEEK)高分子材料以其高强度及高稳定性的生物相容性已广泛用于脊柱等体内植入物假体中。由于其耐腐蚀，PEEK是理想的组配连接材料，但是，目前并没有出现PEEK高分子材料用于髋关节臼杯的报道。In recent years, polyetheretherketone (PEEK) polymer materials have been widely used in implants such as spinal cords for their biocompatibility with high strength and high stability. Because of its corrosion resistance, PEEK is an ideal combination of bonding materials, but there is no report of PEEK polymer materials for hip cups.
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中的假体。Therefore, a new and desirable artificial hip cup that overcomes the above disadvantages is a desired prosthesis.
发明内容Summary of the invention
针对上述解决的技术问题，本发明的目的是提供一种复合式人工髋关节臼杯。In view of the technical problems solved above, it is an object of the present invention to provide a composite artificial hip joint cup.
为了实现上述发明，本发明采用如下技术方案：In order to achieve the above invention, the present invention adopts the following technical solutions:
一种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，包括外层和内层；所述外层具有螺钉孔，所述外层由生物相容材料构成；所述内层由聚醚醚酮或其衍生物高分子材料构成，所述内层与所述外层固定成一体结构；所述螺钉孔被所述内层覆盖。A composite artificial hip joint cup, the artificial hip joint cup has a concave semicircular arc a shape comprising an outer layer and an inner layer; the outer layer having a screw hole, the outer layer being composed of a biocompatible material; the inner layer being composed of a polyether ether ketone or a derivative thereof, the inner layer The outer layer is fixed in a unitary structure; the screw holes are covered by the inner layer.
进一步地，所述生物相容材料为钴铬钼合金、钛或钛合金、钽或钽合金、镁或镁合金、不锈钢和锆铌合金的一种或多种。Further, the biocompatible material is one or more of a cobalt chromium molybdenum alloy, a titanium or titanium alloy, a tantalum or niobium alloy, a magnesium or magnesium alloy, a stainless steel, and a zirconium-niobium alloy.
进一步地，所述外层为多孔结构或所述外层的外表面喷涂便于骨长入的涂层。Further, the outer layer is a porous structure or the outer surface of the outer layer is coated with a coating that facilitates bone ingrowth.
进一步地，所述涂层为羟磷灰石、钽或钽合金、镁或镁合金和锆铌合金的一种或多种。Further, the coating is one or more of hydroxyapatite, ruthenium or osmium alloy, magnesium or magnesium alloy, and zirconium-lanthanum alloy.
进一步地，所述螺钉孔的数量为一个或多个；在相对于所述螺钉孔位置的所述内层处做有方便识别和钻孔定位的标记。Further, the number of the screw holes is one or more; and the inner layer at a position relative to the screw hole is provided with a mark for convenient identification and drilling positioning.
进一步地，所述标记是凹状结构或颜色标记。Further, the indicia is a concave structure or a color mark.
进一步地，所述人工髋关节臼杯的边缘部包含加强部。Further, the edge portion of the artificial hip cup includes a reinforcing portion.
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合金或不锈钢。Further, the reinforcing portion is a high elastic modulus metal ring; the metal ring is made of CoCrMo alloy or stainless steel.
进一步地，所述内层的内表面为标准球形结构，所述内层与髋臼杯内衬组成滑动摩擦面。Further, the inner surface of the inner layer is a standard spherical structure, and the inner layer and the acetabular cup inner liner constitute a sliding friction surface.
进一步地，所述内层的内表面为非标准球形结构，所述内层与髋臼杯内衬为组配式固定结构。Further, the inner surface of the inner layer is a non-standard spherical structure, and the inner layer and the acetabular cup inner liner are assembled and fixed structures.
由于采用以上技术方案，本发明的有益效果为：Due to the adoption of the above technical solutions, the beneficial effects of the present invention are:
1)本发明提供的复合式人工髋关节臼杯，由于手术中根据需要开设螺钉孔，解决了空置的螺钉孔引起骨溶解问题，同时螺钉孔内的PEEK层在螺钉固定后起到密封作用。1) The composite artificial hip joint cup provided by the invention solves the problem of osteolysis caused by the vacant screw hole due to the opening of the screw hole as needed during the operation, and the PEEK layer in the screw hole plays a sealing role after the screw is fixed.
2)本发明提供的复合式人工髋关节臼杯的PEEK内层与不同臼杯衬垫外表面的结合可以降低应力集中，从而减少微动磨损及衬垫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 经螺钉与人体固定后，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。2) The combination of the PEEK inner layer of the composite artificial hip cup and the outer surface of different cup liners provided by the present invention can reduce stress concentration, thereby reducing the risk of fretting wear and liner damage or directly with the femoral head prosthesis The outer surface forms a friction pair. Especially since the edge of the acetabular cup has a reinforcing portion, and the top elastic modulus is lower to make it closer to the human bone, after the operation, the acetabular cup After being fixed by the screw and the human body, the top elastic modulus is lower to fit the human bone, and the acetabular cup edge has a higher elastic modulus, and the acetabular cup during surgery and use is stronger and is not easily deformed.
3)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。3) 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.
4)本发明提供的复合式人工髋关节臼杯的螺钉孔凹状形状更便于手术中的钻孔加工定位。4) The concave shape of the screw hole of the composite artificial hip joint cup provided by the invention is more convenient for drilling and positioning in the operation.
附图说明DRAWINGS
图1为本发明提供的复合式人工髋关节臼杯的结构示意图；1 is a schematic structural view of a composite artificial hip joint cup provided by the present invention;
图2为本发明提供的复合式人工髋关节臼杯的PEEK内层与髋臼杯内衬形成滑动摩擦面的结构示意图；2 is a schematic structural view showing a sliding friction surface of a PEEK inner layer and an acetabular cup inner liner of a composite artificial hip joint cup provided by the present invention;
图3是本发明提供的复合式人工髋关节臼杯的PEEK内层与髋臼杯内衬形成组配式固定结构的结构示意图。3 is a schematic view showing the structure of a PEEK inner layer and an acetabular cup inner liner forming a combined fixing structure of the composite artificial hip joint cup provided by the present invention.
附图标记说明Description of the reference numerals
1 外层、2 螺钉孔、3 内层、4 加强部、5 髋臼杯内衬、6 人工股骨头球头、7 凹状结构。1 outer layer, 2 screw holes, 3 inner layers, 4 reinforced parts, 5 acetabular cup linings, 6 artificial femoral heads, 7 concave structures.
具体实施方式detailed description
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。The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
如图1所示，本发明提供的一种复合式人工髋关节臼杯呈内凹型半圆弧状，包括外层1和内层3；其中外层1具有螺钉孔2，外层1由生物相容材料构成；内层3由聚醚醚酮或其衍生物高分子材料构成，内层3与外层1固定成一体结构；螺钉孔2被所述内层覆盖。As shown in FIG. 1, the composite artificial hip joint cup provided by the present invention has a concave semi-circular shape, including an outer layer 1 and an inner layer 3; wherein the outer layer 1 has a screw hole 2, and the outer layer 1 is biocompatible. The inner layer 3 is composed of a polyetheretherketone or a derivative thereof, and the inner layer 3 and the outer layer 1 are fixed in a unitary structure; the screw holes 2 are covered by the inner layer.
在上述技术方案中，生物相容材料为钴铬钼合金、钛或钛合金、钽或钽合金、镁或镁合金、不锈钢和锆铌合金的一种或多种。 In the above technical solution, the biocompatible material is one or more of a cobalt chromium molybdenum alloy, a titanium or titanium alloy, a tantalum or niobium alloy, a magnesium or magnesium alloy, a stainless steel, and a zirconium-niobium alloy.
在上述技术方案中，外层1为多孔结构或外层1的外表面喷涂便于骨长入的涂层；所述涂层为羟磷灰石、钽或钽合金、镁或镁合金和锆铌合金的一种或多种。In the above technical solution, the outer layer 1 is a porous structure or the outer surface of the outer layer 1 is coated with a coating for facilitating bone ingrowth; the coating is hydroxyapatite, yttrium or lanthanum alloy, magnesium or magnesium alloy and zirconium lanthanum One or more of the alloys.
在上述技术方案中，螺钉孔2的数量为一个或多个；在相对于螺钉孔2位置的内层3处做有方便识别和钻孔定位的标记；再次如图1所示，标记是凹状结构7。In the above technical solution, the number of the screw holes 2 is one or more; at the inner layer 3 with respect to the position of the screw hole 2, a mark for easy identification and drilling positioning is made; again, as shown in FIG. 1, the mark is concave. Structure 7.
在上述技术方案中，标记也可以是颜色标记。In the above technical solution, the mark may also be a color mark.
在上述技术方案中，再次参照图1，人工髋关节臼杯的加强部4为高弹性模量金属环；所述金属环的材质为CoCrMo合金或不锈钢。In the above technical solution, referring again to FIG. 1, the reinforcing portion 4 of the artificial hip joint cup is a high elastic modulus metal ring; the metal ring is made of CoCrMo alloy or stainless steel.
如图2所示，本发明提供的复合式人工髋关节臼杯的PEEK内层3与髋臼杯内衬5形成滑动摩擦面。再次参照图2，PEEK内层3为标准球形结构，PEEK内层3与髋臼杯内衬5的外表面组成滑动摩擦结构，为球形第一关节面，髋臼杯内衬5的内表面与人工股骨头球头6的外表面组成滑动摩擦结构，为球形第二关节面。第一关节面和第二关节面形成了双动关节面，双动关节不但增加人工关节的活动度，而且更重要的是能自行选择摩擦系数低的关节面。As shown in FIG. 2, the PEEK inner layer 3 of the composite artificial hip joint cup provided by the present invention forms a sliding friction surface with the acetabular cup liner 5. Referring again to FIG. 2, the PEEK inner layer 3 is a standard spherical structure, and the PEEK inner layer 3 and the outer surface of the acetabular cup liner 5 constitute a sliding friction structure, which is a spherical first joint surface, and the inner surface of the acetabular cup liner 5 is The outer surface of the artificial femoral head 6 constitutes a sliding friction structure and is a spherical second joint surface. The first joint surface and the second joint surface form a double-motion joint surface. The double-joint joint not only increases the activity of the artificial joint, but more importantly, it can select the joint surface with low friction coefficient.
在上述技术方案中，髋臼杯内衬5由超高分子量聚乙烯(UHMWPE)构成，人工股骨头球头6采用PEEK、CoCrMo合金或者陶瓷材质。In the above technical solution, the acetabular cup liner 5 is composed of ultra high molecular weight polyethylene (UHMWPE), and the artificial femoral head ball 6 is made of PEEK, CoCrMo alloy or ceramic material.
在上述方案中，两个关节面形成双滑动连接结构。还有一种单滑动连接结构，PEEK内层3直接与人工股骨头球头6形成滑动关节面。In the above scheme, the two articular surfaces form a double sliding connection structure. There is also a single sliding connection structure in which the PEEK inner layer 3 directly forms a sliding joint surface with the artificial femoral head.
如图3所示，本发明提供的复合式人工髋关节臼杯的PEEK内层3与髋臼杯内衬5形成组配式固定结构。再次参照图3，PEEK内层3为非标准球形结构，因此，PEEK内层3与髋臼杯内衬5的接触面不能互相滑动，结合面只有微动摩擦。髋臼杯内衬5与人工股骨头球头6形成滑动关节面。As shown in FIG. 3, the PEEK inner layer 3 of the composite artificial hip joint cup provided by the present invention and the acetabular cup liner 5 form a fixed structure. Referring again to Fig. 3, the PEEK inner layer 3 is of a non-standard spherical structure. Therefore, the contact faces of the PEEK inner layer 3 and the acetabular cup liner 5 cannot slide each other, and the joint surface has only fretting friction. The acetabular cup lining 5 forms a sliding articular surface with the artificial femoral head ball 6.
在上述技术方案中，髋臼杯内衬5由超高分子量聚乙烯(UHMWPE)构成，人工股骨头球头6采用PEEK、CoCrMo合金或者陶瓷材质。 In the above technical solution, the acetabular cup liner 5 is composed of ultra high molecular weight polyethylene (UHMWPE), and the artificial femoral head ball 6 is made of PEEK, CoCrMo alloy or ceramic material.
本发明加入了PEEK内层，大幅降低了人工髋臼杯内衬5直接与金属外层之间的微动磨损，同时PEEK材质具有耐腐蚀的优势，因此，可以避免危害人体的金属离子和微粒的释放。The invention incorporates the inner layer of PEEK, which greatly reduces the fretting wear between the artificial acetabular cup liner 5 and the metal outer layer, and the PEEK material has the advantage of corrosion resistance, thereby avoiding metal ions and particles harmful to the human body. Release.
另外，本发明提供的复合式有机高分子材料人工髋关节臼杯的PEEK内层3(或称为内壁)与不同摩擦面的结合可以降低应力集中，从而减少微动磨损及衬垫破损的风险。In addition, the combination of the PEEK inner layer 3 (or inner wall) of the composite organic polymer material artificial hip joint cup provided by the present invention and different friction surfaces can reduce stress concentration, thereby reducing the risk of fretting wear and liner damage. .
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。 The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. The invention is intended to be modified or equivalently substituted without departing from the spirit and scope of the invention. Within the scope of protection.

Claims (10)

  1. 一种复合式人工髋关节臼杯，其特征在于，所述人工髋关节臼杯呈内凹型半圆弧状，包括外层和内层；所述外层具有螺钉孔，所述外层由生物相容材料构成；所述内层由聚醚醚酮或其衍生物高分子材料构成，所述内层与所述外层固定成一体结构；所述螺钉孔被所述内层覆盖。A composite artificial hip joint cup, characterized in that the artificial hip joint cup has a concave semi-circular shape, including an outer layer and an inner layer; the outer layer has a screw hole, and the outer layer is biocompatible The inner layer is composed of a polyetheretherketone or a derivative thereof, and the inner layer is fixed to the outer layer in an integral structure; the screw hole is covered by the inner layer.
  2. 根据权利要求1所述的复合式人工髋关节臼杯，其特征在于，所述生物相容材料为钴铬钼合金、钛或钛合金、钽或钽合金、镁或镁合金、不锈钢和锆铌合金的一种或多种。The composite artificial hip bile cup according to claim 1, wherein the biocompatible material is a cobalt chromium molybdenum alloy, titanium or titanium alloy, tantalum or niobium alloy, magnesium or magnesium alloy, stainless steel and zirconium hafnium. One or more of the alloys.
  3. 根据权利要求1所述的复合式人工髋关节臼杯，其特征在于，所述外层为多孔结构或所述外层的外表面喷涂便于骨长入的涂层。The composite artificial hip joint cup of claim 1 wherein said outer layer is of a porous structure or the outer surface of said outer layer is coated with a coating that facilitates bone ingrowth.
  4. 根据权利要求3所述的复合式人工髋关节臼杯，其特征在于，所述涂层为羟磷灰石、钽或钽合金、镁或镁合金和锆铌合金的一种或多种。The composite artificial hip bile cup according to claim 3, wherein the coating is one or more of hydroxyapatite, strontium or barium alloy, magnesium or magnesium alloy, and zirconium-rhenium alloy.
  5. 根据权利要求1所述的复合式人工髋关节臼杯，其特征在于，所述螺钉孔的数量为一个或多个；在相对于所述螺钉孔位置的所述内层处做有方便识别和钻孔定位的标记。The composite artificial hip joint cup according to claim 1, wherein the number of the screw holes is one or more; and the inner layer at a position relative to the screw hole is conveniently identified and Marking of the drilling location.
  6. 根据权利要求5所述的复合式人工髋关节臼杯，其特征在于，所述标记是凹状结构或颜色标记。The composite artificial hip cup of claim 5, wherein the indicia is a concave structure or a color marking.
  7. 根据权利要求1所述的复合式人工髋关节臼杯，其特征在于，所述人工髋关节臼杯的边缘部包含加强部。The composite artificial hip joint cup according to claim 1, wherein the edge portion of the artificial hip joint cup includes a reinforcing portion.
  8. 根据权利要求7所述的复合式人工髋关节臼杯，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合金或不锈钢。The composite artificial hip joint cup according to claim 7, wherein the reinforcing portion is a high elastic modulus metal ring; and the metal ring is made of CoCrMo alloy or stainless steel.
  9. 根据权利要求1所述的复合式人工髋关节臼杯，其特征在于，所述内层的内表面为标准球形结构，所述内层与髋臼杯内衬组成滑动摩擦面。The composite artificial hip joint cup according to claim 1, wherein the inner surface of the inner layer is a standard spherical structure, and the inner layer and the acetabular cup inner liner constitute a sliding friction surface.
  10. 根据权利要求1所述的复合式人工髋关节臼杯，其特征在于，所 述内层的内表面为非标准球形结构，所述内层与髋臼杯内衬为组配式固定结构。 The composite artificial hip joint cup according to claim 1, wherein The inner surface of the inner layer is a non-standard spherical structure, and the inner layer and the acetabular cup lining are assembled and fixed structures.
PCT/CN2016/080040 2015-05-15 2016-04-22 Acetabular socket of composite artificial hip joint WO2016184293A1 (en)

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