CN201150576Y - 新型股骨头置换关节类假体 - Google Patents

新型股骨头置换关节类假体 Download PDF

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Publication number
CN201150576Y
CN201150576Y CN 200720159345 CN200720159345U CN201150576Y CN 201150576 Y CN201150576 Y CN 201150576Y CN 200720159345 CN200720159345 CN 200720159345 CN 200720159345 U CN200720159345 U CN 200720159345U CN 201150576 Y CN201150576 Y CN 201150576Y
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prosthesis
femoral head
femoral
prosthese
marrow cavity
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国华
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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
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • 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
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof

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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

公开了一种新型股骨头置换关节类假体，由假体股骨头(1)、假体股骨颈(2)、假体股骨头柄(3)组成，假体股骨头柄(3)插入骨髓腔的钴铬钼合金外层，由加工成锯齿形的记忆合金包裹。采用本实用新型，假体股骨头在低温状态下打入骨髓腔后，在患者的体温下逐渐恢复记忆，其周边的锯齿有力伸开插入骨髓腔内侧壁，从而使其与骨髓腔紧密结合，避免了松动，保证了手术成功率，是一种效果好、成功率高的新型股骨头置换假体。

Description

新型股骨头置换关节类假体
技术领域
本实用新型涉及矫形外科的骨科置换关节类假体，具体地说是一种新型股骨头置换假体。
背景技术
在矫形外科的骨科置换关节类假体中，虽经工艺及材料的多方改进，股骨头假体置换后松动依然是关节置换失败的最常见原因。一是手术问题：如生物型股骨头柄，一般打入骨髓腔不能太紧，但术后随着负重增加往往会引起下沉。骨水泥型扩骨髓腔由于清理很难做到非常彻底，结合不紧密，二种方法都存在术后股骨头松动问题。二是患者自身的原因：患者由于骨质疏松，引起股骨头柄周围骨质吸收、造成间隙而引起术后股骨头松动。
发明内容
本实用新型的目的是提供一种能与股骨髓腔紧密结合、具有记忆功能的镍钛记忆合金新型股骨头置换关节类假体。
本实用新型是这样实现的：新型股骨头置换关节类假体，由假体股骨头、假体股骨颈、假体股骨头柄组成，其要点在于：假体股骨头柄插入骨髓腔的钴铬钼合金外层，由加工成锯齿形的记忆合金包裹。
记忆合金是一种原子排列规则，体积变化为小于0.5％的马氏体相变合金。这种合金在低温下硬度降低且具有可塑性，在外力作用下会产生变形。外力去掉后，在一定的温度条件下，又可以恢复原有的形状及硬度。
基于此原理，将外层包裹加工成锯齿形记忆合金的股骨头柄3，经低温处理，使其周边的锯齿在贴服状态，在充分扩髓后，将其打入骨髓腔，并适当固定，进入骨髓腔的股骨头柄3上包裹的记忆合金，在体温的作用下逐渐恢复记忆，锯齿缓慢伸开，并牢牢嵌入骨髓腔，实现人工股骨头柄与股骨髓腔的牢固结合。
采用本实用新型，置入的假体股骨头的股骨头柄3插入骨髓腔的钴铬钼合金外层，由加工成锯齿形的记忆合金包裹。由于所选记忆合金为镍钛合金，材料的性质稳定。假体股骨头在低温状态下打入骨髓腔后，在患者的体温下逐渐恢复记忆，其周边的锯齿有力伸开插入骨髓腔内侧壁，从而使其与骨髓腔紧密结合，避免了松动，保证了手术成功率。
附图说明
图1为本实用新型示意图。
图2为本实用新型置入关节体内的假体股骨头柄(3)局部剖视图。
具体实施方式
如图1、图2所示，实施手术时将假体股骨头柄3的记忆合金包裹段，使用冰块充分降温，用扩髓工具将患者股骨髓腔充分扩髓，然后将经降温处理的假体股骨头柄3打入骨髓腔，由于记忆合金的特性，打入骨髓腔的假体股骨头柄3上包裹的记忆合金，随着患者的体温逐渐恢复记忆，其周边的锯齿有力伸开插入骨髓腔内侧壁，从而使其与骨髓腔紧密结合，避免了松动。因此，本实用新型是一种结构简单、手术效果好、成功率高的新型股骨头置换关节类假体。

Claims (1)

1、一种新型股骨头置换关节类假体，由假体股骨头(1)、假体股骨颈(2)、假体股骨头柄(3)组成，其特征是：假体股骨头柄(3)插入骨髓腔的钴铬钼合金外层，由加工成锯齿形的记忆合金包裹。
CN 200720159345 2007-12-11 2007-12-11 新型股骨头置换关节类假体 Expired - Fee Related CN201150576Y (zh)

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Application Number Priority Date Filing Date Title
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8579985B2 (en) 2006-12-07 2013-11-12 Ihip Surgical, Llc Method and apparatus for hip replacement
US8795381B2 (en) 2006-12-07 2014-08-05 Ihip Surgical, Llc Methods and systems for hip replacement
US8974540B2 (en) 2006-12-07 2015-03-10 Ihip Surgical, Llc Method and apparatus for attachment in a modular hip replacement or fracture fixation device
CN105326584A (zh) * 2015-12-09 2016-02-17 上海市第一人民医院 一种人工关节
CN106492280A (zh) * 2016-11-24 2017-03-15 北京华钽生物科技开发有限公司 一种抗感染、耐摩擦、生物相容性高人工关节制品及其制造方法

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8579985B2 (en) 2006-12-07 2013-11-12 Ihip Surgical, Llc Method and apparatus for hip replacement
US8795381B2 (en) 2006-12-07 2014-08-05 Ihip Surgical, Llc Methods and systems for hip replacement
US8974540B2 (en) 2006-12-07 2015-03-10 Ihip Surgical, Llc Method and apparatus for attachment in a modular hip replacement or fracture fixation device
US9237949B2 (en) 2006-12-07 2016-01-19 Ihip Surgical, Llc Method and apparatus for hip replacement
CN105326584A (zh) * 2015-12-09 2016-02-17 上海市第一人民医院 一种人工关节
CN106492280A (zh) * 2016-11-24 2017-03-15 北京华钽生物科技开发有限公司 一种抗感染、耐摩擦、生物相容性高人工关节制品及其制造方法

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Granted publication date: 20081119

Termination date: 20101211