KR100773108B1 - 뼈 나사 - Google Patents

뼈 나사 Download PDF

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KR100773108B1
KR100773108B1 KR1020027008847A KR20027008847A KR100773108B1 KR 100773108 B1 KR100773108 B1 KR 100773108B1 KR 1020027008847 A KR1020027008847 A KR 1020027008847A KR 20027008847 A KR20027008847 A KR 20027008847A KR 100773108 B1 KR100773108 B1 KR 100773108B1
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tip
bone screw
thread
head
bone
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KR20020075782A (ko
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루츠 비더만
위르겐 하름스
로날드 더블유. 린지
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비이더만 모테크 게엠베하
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86Pins or screws or threaded wires; nuts therefor
    • A61B17/864Pins or screws or threaded wires; nuts therefor hollow, e.g. with socket or cannulated
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86Pins or screws or threaded wires; nuts therefor
    • A61B17/8605Heads, i.e. proximal ends projecting from bone
    • A61B17/861Heads, i.e. proximal ends projecting from bone specially shaped for gripping driver
    • A61B17/8615Heads, i.e. proximal ends projecting from bone specially shaped for gripping driver at the central region of the screw head
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86Pins or screws or threaded wires; nuts therefor
    • A61B17/8625Shanks, i.e. parts contacting bone tissue
    • A61B17/863Shanks, i.e. parts contacting bone tissue with thread interrupted or changing its form along shank, other than constant taper
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86Pins or screws or threaded wires; nuts therefor
    • A61B17/8625Shanks, i.e. parts contacting bone tissue
    • A61B17/8635Tips of screws
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86Pins or screws or threaded wires; nuts therefor
    • A61B17/8685Pins or screws or threaded wires; nuts therefor comprising multiple separate parts
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86Pins or screws or threaded wires; nuts therefor
    • A61B17/869Pins or screws or threaded wires; nuts therefor characterised by an open form, e.g. wire helix

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  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Neurology (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)
  • Materials For Medical Uses (AREA)

Abstract

본 발명은 나사부(1)와, 제1단부에 위치된 팁(6)과, 대향하는 제2단부에 위치되고 스크루드라이버와 맞물리는 헤드(8)를 가지는 뼈 나사에 관한 것이다. 상기 뼈 나사는 분쇄된 뼈 부분들을 접합하기 위한 견인 요소로 작용한다. 나사가 뼈와 융합할 수 있게 하기 위해, 상기 나사부(1)가 관형이고 그의 벽이 다수의 오목부들을 가진다.

Description

뼈 나사{Bone Screw}
본 발명은 나사부와, 제1단부의 팁과, 맞은편 제2단부에 위치되고 스크루드라이버와 맞물리는 헤드를 가지는 뼈 나사에 관한 것이다.
EP-A-0 682 917호로부터, 팁에서 약간 떨어져 시작하는 외부 뼈 나사를 가지고 있고, 또한 뼈가 붙을 수 있게 하는 오목부들을 외측 케이싱에 가지는 중공의 원통형 핀이 알려져 있다. 이 장치는 사전에 천공된 구멍에만 나사 결합이 가능하도록 구성되어 있다.
WO 97/37603호로부터, 생크(shank)에 내부 성장용 다수의 구멍을 천공한 뼈 나사가 알려져 있다.
US-6,048,343호로부터, 챔퍼가공(chamfered)된 뼈 나사를 구비한 뼈 나사 시스템이 알려져 있다.
본 발명의 목적은 서두에 기술된 종류의 뼈 나사를 개선하는 것이다.
이 목적은, 관형의 나사부가 그의 외벽에 뼈 나사산을 가지고 있고 적어도 일 단부에 헤드 또는 팁이 나사 결합하기 위한 내부 나사산을 가지는 뼈 나사에 의해 달성된다. 이 나사는 다양한 헤드 또는 팁을 나사 결합할 수 있으므로 가변성이 매우 크다.
다른 실시형태에 따르면, 내부 나사산이 나사부의 전체 길이에 걸쳐 연장한다. 따라서, 시술 현장에서 나사부를 필요한 길이로 절단할 수 있으므로 가변성이 크게 크게 증대된다.
또 다른 실시형태에 따르면, 뼈 나사는 관형의 나사부가 그의 외벽에 뼈 나사산을 가지고 있고, 팁이 자동 절삭(self-cutting) 팁으로 구성된 것을 특징으로 한다. 그 결과, 나사를 삽입하기 위한 보어를 미리 형성할 필요가 없어진다. 또 다른 실시형태는, 관형 나사부가 그의 외벽에 뼈 나사산을 가지고 있고, 헤드 및/또는 팁이 상기 나사부의 양 단부에 긴밀한 끼워맞춤으로 삽입될 수 있는 치수로 형성된 것을 특징으로 한다. 따라서, 나사부를 필요한 길이로 시술 현장에서 절단할 수 있고, 원하는 종류의 헤드 또는 팁이 삽입될 수 있는 경우, 삽입 방법의 가변성이 증대된다.
본 발명의 추가의 실시형태는 청구범위의 종속청구항에 기술되었다.
본 발명의 추가의 특징과 장점들은 도면에 의거한 실시예의 설명으로부터 나타난다.
도 1은 본 발명의 뼈 나사의 분해도를 나타낸다.
도 2는 제1 실시예의 조립된 뼈 나사를 나타낸다.
도 3은 제2 실시예의 조립된 뼈 나사를 나타낸다.
도 4는 도 1의 일 부분의 확대도를 나타낸다.
도 5는 도 1의 일 부분의 확대 단면도를 나타낸다.
도 1에 상세히 도시된 바와 같이, 본 발명의 뼈 나사는 관형의 나사부(1)를 가지고 있다. 이 뼈 나사는 그의 벽에 다수의 오목부(2)를 가지고 있고, 그 오목부는 도시된 실시예에서는 마름모꼴 모양으로 되어 있다. 그 마름모꼴 오목부들은 각각의 대칭축이 관의 대칭축에 평행하도록 정렬되어 있다. 제1 세트의 다수의 오목부(2)는 원주 방향으로 서로 어긋나 있다. 그 제1 세트의 오목부(2)의 축방향 인접부에는 제2 세트의 다수의 오목부(3)가 배치되어 있고, 이들 오목부(3)는 원주 방향에서 볼 때 동일 간격으로 이격되어 있고, 축방향에서 볼 때 상기 하나의 제2 세트의 오목부(3)가 2개의 제1 세트의 오목부(2) 사이에 위치하도록 배치되어 있다. 이러한 패턴은 전체 표면에 걸쳐 계속된다. 그 오목부는 마름모꼴 모양으로 되어 있는 것이 바람직하지만, 다른 실시예에 따르면 다른 형태의 오목부, 특히 원형 오목부도 제공될 수 있다.
외벽에는 소위 뼈 나사산(4)이 제공되어 있고, 그 나사산은 통상의 뼈 나사의 것과 형상이 일치한다. 그 뼈 나사산은 도 4에 상세히 도시되어 있다.
본 발명의 뼈 나사는 관의 한쪽 단부에 부착되는 팁(6)을 더 포함한다. 그 팁은 실제의 팁과 생크(shank; 7)를 포함한다. 도시된 실시예에 있어서, 그 생크(7)는 외부 미터 나사산(metric thread)을 가지고 있다. 관형의 나사부(1)의 내벽에는 상기 외부 미터 나사산에 대응하는 내부 미터 나사산을 가지고 있으므로 상기 팁(6)과 관형의 나사부(1)는 도 2에 도시된 방법으로 팁을 나사 결합시킴으로써 서로 견고하게 연결된다. 상기 뼈 나사산(4)은 오른 나사 경사를 가지는데 대하여 상기 2개의 외부 및 내부 미터 나사산은 왼 나사로 되어 있다.
도 1에 가장 잘 도시된 바와 같이, 본 발명의 뼈 나사는 슬릿 또는 내부 6각형 홈이 있는 실제 헤드부(9)와 나사산이 형성된 생크(11)를 가지는 헤드(8)를 포함한다. 나사부(1)를 형성하는 관의 관련된 단부에는 상기 헤드의 생크(11)의 나사산과 맞물리는 내부 미터 나사산이 구비되어 있다. 또한, 상기 생크(11)의 나사산과 상기 나사부(1)의 내부 나사산은 왼 나사산으로 구성되는 것이 바람직하다. 헤드(8)는 도 2에 도시된 방법으로 나사부(1) 내에 견고하게 나사 결합된다.
도 3에 나타낸 실시예는 제1 실시예와 달리 팁(12)이 자동 절삭(self-cutting) 팁으로서 구성되어 있다. 본 실시예의 팁과 제1 실시예의 팁은 모두 라운드 가공되어 있다.
상기 실시예들에서 팁과 헤드는 나사 결합된다. 상기 내부 미터 나사산은 헤드와 팁이 나사 결합될 수 있도록 나사부의 양 단부에 걸쳐 연장한다.
바람직한 실시예에 의하면, 내부 나사산은 나사부의 전체 길이에 걸쳐 연장한다. 이같은 구성은 관을 임의의 길이로 절단하여 필요한 길이의 나사를 얻을 수 있고, 그 결과 저장량을 상당히 감소시킬 수 있는 장점을 가진다.
다른 실시예에 의하면, 나사부(1)의 내벽과 생크(7, 11)는 나사산을 형성하지 않고, 팁과 헤드가 나사부(1)에 긴밀한 끼워맞춤에 의해 연결되도록 치수가 정해진다.
또는 나사산이 일 단부에 제공될 수 있고, 관련 요소, 다시 말해, 팁 또는 헤드가 상응하는 나사산을 가질 수 있고 나사 결합될 수 있고, 이 단부에서 소정의 길이로 관을 자르는 것이 여전히 가능하며, 다른 요소, 다시 말해 팁 또는 헤드가 긴밀한 끼워맞춤에 의해 부착될 수 있다.
뼈 나사를 형성하는 부품들은 타티늄으로 제조하는 것이 바람직하다.
또한, 팁과 헤드를 나사 결합시킬 수 있는 구조로 제조된 나사는 그 공동부 내에 뼈 물질 또는 다른 성장촉진 물질을 충전할 수 있으므로 치료 과정을 대폭 가속화하는 장점이 제공된다.

Claims (8)

  1. 관으로 구성되고 벽에 다수의 오목부(2,3)를 가진 나사부(1)와, 제1단부의 팁(6, 12)과, 대향하는 제2단부에 제공되고 스크루드라이버와 맞물리는 헤드(8)를 가지는 뼈 나사에 있어서, 상기 나사부(1)가 그의 외벽에 뼈 나사산(4)을 가지고 있고, 적어도 일 단부에는 상기 헤드(8) 또는 상기 팁(6, 12)이 나사 결합하기 위한 내부 나사산을 가지는 것을 특징으로 하는 뼈 나사.
  2. 제 1 항에 있어서, 상기 내부 나사산이 미터 나사산(5)으로 구성된 것을 특징으로 하는 뼈 나사.
  3. 제 1 항 또는 제 2 항에 있어서, 상기 팁(12)이 자동 절삭팁으로 구성된 것을 특징으로 하는 뼈 나사.
  4. 제 1 항에 있어서, 상기 내부 나사산이 상기 나사부(1)의 전체 길이에 걸쳐 연장하는 것을 특징으로 하는 뼈 나사.
  5. 관으로 구성되고 벽에 다수의 오목부(2,3)를 가진 나사부(1)와, 제1단부의 팁(12)과, 대향하는 제2단부에 제공되고 스크루드라이버와 맞물리는 헤드(8)를 가지는 뼈 나사에 있어서, 상기 나사부(1)가 그의 외벽에 뼈 나사산(4)을 가지고 있고, 상기 팁(12)이 자동 절삭 팁으로 구성된 것을 특징으로 하는 뼈 나사.
  6. 제 5 항에 있어서, 상기 나사부가 적어도 일 단부에, 상기 헤드(8) 또는 상기 팁(12)이 나사 결합하기 위한 내부 나사산을 가지는 것을 특징으로 하는 뼈 나사.
  7. 관으로 구성되고 벽에 다수의 오목부(2,3)를 가진 나사부(1)와, 제1단부의 팁(6, 12)과, 대향하는 제2단부에 제공되고 스크루드라이버와 맞물리는 헤드(8)를 가지는 뼈 나사에 있어서, 상기 나사부(1)가 그의 외벽에 뼈 나사산(4)을 가지고 있고, 상기 헤드(8) 및/또는 상기 팁(6, 12)이 상기 나사부(1)의 양 단부에 긴밀한 끼워맞춤으로 삽입될 수 있는 치수로 된 것을 특징으로 하는 뼈 나사.
  8. 제 7 항에 있어서, 상기 팁(12)이 자동 절삭 팁으로 구성된 것을 특징으로 하는 뼈 나사.
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AU2184402A (en) 2002-05-21
DE10055891A1 (de) 2002-06-06
US8137389B2 (en) 2012-03-20
WO2002038054A3 (de) 2002-07-04
US20140081338A1 (en) 2014-03-20
US20040015172A1 (en) 2004-01-22
JP3929897B2 (ja) 2007-06-13
DE50100598D1 (de) 2003-10-16
US8968372B2 (en) 2015-03-03
ATE249176T1 (de) 2003-09-15
KR20020075782A (ko) 2002-10-05
EP1246578A2 (de) 2002-10-09
WO2002038054A2 (de) 2002-05-16
US20150320469A1 (en) 2015-11-12
JP2004512895A (ja) 2004-04-30
US9468483B2 (en) 2016-10-18
EP1246578B1 (de) 2003-09-10
US20120265256A1 (en) 2012-10-18

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