KR20060063950A - 뼈플레이트 - Google Patents
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- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
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- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
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Abstract
뼈플레이트(1)는 뼈에 닿는 하면(2)과 상면(8), 그리고 상기 하면(2)을 상기 상면(8)과 연결하며 중심의 구멍축(5)을 갖는 다수 개의 구멍(3)을 구비한다. 상기 플레이트(1)의 적어도 하나의 구멍(3)은 상기 하면(2)을 향해 테이퍼진 내부표면재킷(4)을 갖고, 상기 내부표면재킷(4)은 상기 구멍축(5)으로부터 방사상으로 연장되는 3개 이상의 리세스(6)를 갖는다.
뼈플레이트, 리세스, 뼈나사.
Description
본 발명은 특허청구범위 제 1항의 전제부에 따른 뼈플레이트에 관한 것이다.
이러한 뼈플레이트는 전체 골격을 위한 적절한 조치로써 제안된다. 그러나 특히 중요한 점은 수술에 의해 골절을 치료할 보통 다소의 뼈조각들이다.
일반적인 타입의 뼈플레이트는 DE-A 198 32 513으로부터 알려져 있다. 이러한 공지된 발명의 경우에, 뼈플레이트에 대해 뼈나사(bone screw)의 각정렬과 각도상 안정된 고정은 상기 나사와 상기 플레이트의 구멍 사이에 배치된 고리(ring)에 의해 달성될 수 있다. 본 구조의 단점은 한편으로는 추가적인 요소(고리)가 첨부되어 제작공정이 더 비싸지고 상기 작은 고리가 상기 플레이트의 상기 구멍으로부터 이탈하거나 밀려나가서 상기 장치를 쓸모없게 만들 위험이 있으며, 다른 한편으로는 상기 나사를 삽입하기 전에 상기 고리의 축이 일치하게 정렬되어야 하므로 더 높은 수준의 수술 기술이 요구된다는 점이다.
본 발명은 이와 같은 문제점들을 해결하기 위한 것이다. 본 발명의 목적은 각도와 축(axis)에 관한 한 안정된 방식으로, 종래의 잠김 누름나사(locking capscrew)를 수용하기 위한 추가적인 요소 없이 배치되는 뼈플레이트를 제공하기 위한 것이다.
본 발명은 제 1청구항의 특징을 보여주는 뼈플레이트를 제공함으로써 이와 같은 문제점을 해결한다.
본 발명에 의해 얻어 지는 장점은, 본 발명에 따른 뼈플레이트의 결과로서 뼈나사는, 종래기술과는 달리 안정성을 포기하지 않고도, 상기 구멍의 특정 축과는 다른 각도로(보통 상기 뼈플레이트의 수평면에 대해서 직각으로) 삽입될 수 있고, 이러한 위치에 고정될 수 있다는 점이다.
상기 플레이트의 구멍의 내부재킷표면(internal jacket surface)안의 최소한 세 개의 리세스(recess)로 인해, 중앙에 밀집된 베어링표면(bearing surface)은 상기 누름나사를 위해 제공되고, 상기 뼈나사가 기울어졌을 때에도 하중을 분산시키는 결과를 가져온다. 나사산 헤드(threaded head)를 갖는 뼈나사와 상기 플레이트 안에 내부 나사산을 갖는 구멍들의 경우, 상기 나사가 경사지면 상기 나사산 헤드는 상기 리세스들로 인해 단속적인 상기 플레이트의 구멍 속의 상기 나사산 피치를 가로지르지 않고 건너뛸 수 있다.
본 발명에 따른 상기 뼈플레이트의 다른 장점은 드릴링 부시(drilling bush)또는 가이드 부시(guide bush)를 가이드하기 위해, 상기 플레이트의 구멍들 안에 최소한 세 개의 리세스를 사용할 수 있는 가능성이 존재한다는 점이다. 이에 의해 상기 뼈나사는 삽입되는 동안 가이드 될 수 있다. 이 경우 상기 드릴링 부시 또는 가이드 부시는 더 이상 상기 플레이트의 구멍 안으로 죄여질 필요가 없고(최신 기술의 경우 그러하듯), 다만 리세스들로 인해 상기 플레이트의 구멍 안으로, 결과적으로 중심과 구멍의 축 방향에 간단한 방식으로, 삽입되어야 한다.
이러한 목적을 위해 요구되는 모든 것은 캐뉼러에 꽂은 드릴링 부시 또는 가이드 부시의 첨단이, 나사산 등이 없이, 상기 플레이트 구멍의 빈 입체구조, 비슷한 동작, 구조를 가져야 한다는 점이다. 스냅인(snap-in) 메커니즘은 체결에서도 사용될 수 있을 것이다.
본 발명의 보다 개선된 점들은 종속항에 특징화되어 있다.
특히, 상기 플레이트의 구멍의 내부재킷표면은 3차원 구조를 구비한다. 이는 대응되도록 구성된 누름나사를 가이드하는 목적을 수행한다. 상기 3차원 구조는 육안으로 관찰가능하고 바람직하게는 상기 나사산의 부분 혹은 전체 피치, 리브(rib), 또는 돌기(protuberation)를 포함한다. 또한 상기 내부재킷표면은 여러줄나사(multi-start thread)일 수 있다.
N개의 상기 리세스로 형성되는, N개의 '잠금다리(locking leg)'의 표면의 구조는 유리하게 구성되어 삽입될 뼈나사와의 결합을 용이하게 한다. 이는 종래의 헬리컬 나사산(helical thread), 피치를 갖거나 또는 갖지 않는 나사산과 같은 모양, 일정 개수의 그루브(groove)나 리브(rib), 또는 피치를 갖거나 혹은 갖지 않는 준나사산(quasi-thread) 형태일 수 있다. 상기 그루브나 리브의 개수는 바람직하게는 항상 홀수개이다.(예를 들어 3, 5, 7, 또는 9)
상기 내부재킷표면은 요면(concave), 바람직하게는 구형, 테이퍼진 모양 또는 타원체 모양을 가질 수 있다. 이런 모양은, 최신기술에 따른 장치들의 경우처럼, 상기 뼈나사와 상기 내부재킷표면의 처음 접촉 시에 상기 뼈플레이트를 통해 압축력을 쓰지 않아도 자동적으로 상기 뼈나사가 상기 플레이트의 상기 구멍 안으로 당겨지므로 뼈나사의 삽입이 용이하다.
더 발전된 경우, 상기 플레이트의 최소한 하나의 구멍이 타원형으로 구성된다.
N개의 리세스는 중심축에 대해서 360°/N의 간격으로 배열된다. 바람직하게는 상기 리세스는 적어도 1°에서 최대 119°의 외주 간격(peripheral expansion)을 갖는다. 동시에 상기 N개의 리세스는 상기 내부재킷표면을 재킷표면의 임의개수의 구획으로 나눈다.
특별실시예의 경우, 상기 리세스는 상기 내부재킷표면 내에서 독립적으로 연장된다. 다른 실시예의 경우, 상기 리세스는 내부재킷표면을 통과하여 상기 구멍의 축으로부터 방사상으로 연장된다.
상기 리세스는 상측에서 하측으로 원통형이나 테이퍼지게 연장될 수 있다. 이는 상기 리세스가 드릴링 부시의 고정, 예비 드릴링(pre-drilling), 또는 커슈너와이어(Kirschner wire)의 삽입을 위해 사용될 수 있다는 장점이 있다. 따라서 상기 드릴링 부시는 구멍 안으로 죄일 필요가 없고, 상기 나사를 위한 베어링구역(bearing area)을 손상시키지 않고 삽입될 수 있다.
상기 리세스는 상기 뼈플레이트의 전체 길이에 걸쳐서 상측에서 하측으로 연장될 수 있다.
상기 뼈플레이트는 강철, 티타늄 또는 플라스틱재질로 만들 수 있다. 플라스틱 플레이트의 경우, 40~70%의 파단신율과 3000~6000N/㎟의 탄성율을 갖는 폴리아크릴 에테르케톤(PEAK) 또는 폴리에테르 에테르케톤(PEEK)이 바람직하다. 그러나 80~120%의 파단신율과 2000~3500N/㎟의 탄성율을 갖는 폴리술폰(polysulphon) 또한 사용될 수 있다. 또한 1.5~2.5%의 파단신율과 5000~20000N/㎟의 탄성율을 갖는 액정고분자(lipuid crystal polymer LCP)도 적당하다. 마지막으로, 10~50%의 파단신율과 2000~3500N/㎟의 탄성율을 갖는 폴리옥시메틸렌(polyoxymethylene POM)과 0.2~1.0%의 파단신율과 12000~20000N/㎟의 탄성율을 갖는 폴리페닐렌술피드(polyphenylenesulphide PPS)도 사용될 수 있다.
플라스틱재질의 뼈플레이트는 금속, 플라스틱 또는 탄소섬유로 강화될 수 있다.
다양한 뼈나사들이 뼈플레이트와 함께 사용될 수 있다. 예를 들어, 철면(convex), 바람직하게는 구형 또는 테이퍼진 머리부분을 가질 수 있다. 또한 상기 뼈나사의 상기 머리부분은 3차원 구조를 가질 수 있다. 특별실시예에서는, 상기 뼈나사의 상기 머리부분이 상기 뼈플레이트의 내부재킷표면보다 단단한 재질로 만들어진다. 상기 뼈플레이트의 내부재킷표면과 상기 뼈나사의 머리부분은 바람직하게 결합하는 나사산을 갖는다.
플라스틱 플레이트의 경우, 상기 플레이트의 구멍은 금속 나사산 삽입물로 실행될 수 있다. 반대로 금속 뼈 플레이트의 경우, 상기 플레이트의 구멍은 중합체(polymer) 나사산 삽입물로 실행될 수 있다.
다음은 본 발명과 본 발명의 개선을 몇 가지 실시예를 부분적으로 표현하는 개략도를 참조하여 설명한다.
도 1은 테이퍼진 구멍을 갖는 뼈플레이트의 종단면도이다.
도 2는 구형의 구멍을 갖는 뼈플레이트의 종단면도이다.
도 3은 플레이트 구멍의 내부재킷표면 안에 세 개의 리세스를 갖는 뼈플레이트의 평면도이다.
도 4는 도 3에 따른 플레이트 구멍의 내부재킷표면 안에 더 큰 리세스를 갖는 뼈플레이트의 변형을 보여주는 평면도이다.
도 5는 플레이트의 타원형 구멍의 내부재킷표면 안에 네 개의 리세스를 구비한 나사산 삽입물을 갖는 뼈플레이트의 평면도이다.
도 6은 뼈나사가 삽입된 도 1에 따른 뼈플레이트를 위에서 바라본 사시도이다.
도 7은 뼈나사가 삽입된 도 1에 따른 뼈플레이트를 아래에서 바라본 사시도이다.
도 8은 각정렬오차 없이 뼈나사가 삽입된 뼈플레이트의 종단면도이다.
도 9는 각정렬오차가 발생한 뼈나사가 삽입된 뼈플레이트의 종단면도이다.
도 1과 도 3에 도시된 뼈플레이트(1)는 뼈에 닿는 하면(2), 상면(8), 그리고 상기 하면(2)과 상기 상면(8)을 연결하고 중심의 구멍축(5)을 갖는 다수개의 구멍(3)을 갖는다. 상기 플레이트의 구멍(3)은 하면(2)을 향해 테이퍼진 내부재킷표면(4)을 구비한다. 또한, 상기 내부재킷표면(4)은 서로 120°의 동일한 간격으로 구 멍축(5)으로부터 방사상으로 연장되는 세 개의 리세스(6)를 갖는다. 그 외주간격은 대략 40°이고 상기 리세스(6)는 상기 내부재킷표면(4) 내에서 독립적으로 연장된다. 상기 리세스(6)는 상기 상면(8)으로부터 하면으로(2) 상기 뼈플레이트(1)의 전체높이에 걸쳐서 테이퍼지게 연장된다. 또한, 상기 내부재킷표면(4)은 나사산 형태로 3차원구조(7)를 구비한다.
도 4는 도 3에 따른 뼈플레이트(1)의 변형을 보여주는데, 상기 리세스(6)는 내부재킷표면(4)을 지나서 상기 구멍(3)의 축으로부터 방사상으로 연장된다.
도 2와 도 5는 다른 실시예를 나타내는데, 플레이트의 상기 구멍(3)들은 타원형의 구멍으로 구성된다. 상기 뼈플레이트(1)는 기본적으로 플라스틱 재질(PEEK)로 만들어지며 상기 구멍(3)에 형성되고 티타늄으로 만들어지는 금속 나사산삽입물(9)이 삽입된다. 본 실시예에서는 상기 플레이트(1)의 상기 구멍(3)들은 상기 내부재킷표면(4)을 지나며 구멍축(5)으로부터 방사상으로 연장되는 네 개의 리세스(6)를 구비한다. 상기 내부재킷표면(4)은 네 개의 구획으로 나뉜다. 상기 리세스(6)는 상기 상면(8)으로부터 상기 하면(2)으로 상기 뼈플레이트(1)의 전체높이에 걸쳐서 테이퍼지게 연장된다. 또한, 상기 내부재킷표면(4)은 여러줄나사의 형태로 3차원구조(7)를 구비한다. 본 실시예에서는 재질과 관련하여서, 상기 뼈플레이트(1)가 기본적으로 금속(티타늄)으로 만들어지며 상기 플레이트(1)의 구멍(3)에 형성되고 플라스틱재질로 만들어지는 나사산삽입물(9)이 삽입되는 방식으로 바뀔 수 있다.
도 6은 도 1에 따른 뼈플레이트(1)를 도시하는데, 위에서부터 삽입된 뼈나사(10)와 구형의 머리부분(11)을 나타낸다. 도 7은 아래에서 바라본 같은 뼈플레이트 (1)를 도시한다.
도 8은 각정렬오차없이 뼈나사(10)가 삽입된 뼈플레이트(1)를 도시한다. 상기 뼈플레이트(1)의 구멍(3)의 상기 내부재킷표면(4)과 상기 뼈나사(10)의 상기 머리부분(11)은 결합되는 나사산(13)을 갖는다.
도 9는 도 8과 같은 변형을 도시하는데, 각정렬오차를 갖고 삽입된 상기 뼈나사(10)를 나타낸다.
Claims (31)
- 뼈에 닿는 하면(2)과 상면(8), 그리고 상기 하면(2)을 상기 상면(8)과 연결하고 중심의 구멍축(5)을 가지며 적어도 하나는 상기 하면(2)을 향해 테이퍼진 내부재킷표면(4)을 갖는 다수 개의 구멍(3)으로 구성되는 뼈플레이트(1)에 있어서,A) 상기 내부재킷표면(4)은 상기 구멍축(5)으로부터 방사상으로 연장되는 3개 이상의 리세스(6)를 구비하고,B) 또한 상기 내부재킷표면(4)은 3차원구조(7)를 구비함을 특징으로 하는 뼈플레이트(1).
- 제 1 항에 있어서, 상기 내부재킷표면(4)은 요면(concave) 모양을 갖는 것을 특징으로 하는 뼈플레이트(1).
- 제 2 항에 있어서, 상기 내부재킷표면(4)은 구형, 테이퍼진 모양 또는 타원체 모양을 갖는 것을 특징으로 하는 뼈플레이트(1).
- 제 1 항 내지 제 3 항 중 어느 한 항에 있어서, 상기 플레이트의 적어도 하나의 상기 구멍(3)은 타원형 구멍으로 구성됨을 특징으로 하는 뼈플레이트(1).
- 제 1 항 내지 제 4 항 중 어느 한 항에 있어서, 상기 3차원구조(7)는 육안 으로 관찰가능하고 바람직하게는 상기 나사산의 부분 혹은 전체 피치, 리브(rib), 또는 돌기(protuberation)를 포함하는 것을 특징으로 하는 뼈플레이트(1).
- 제 1 항 내지 제 5 항 중 어느 한 항에 있어서, 임의개수(N)의 리세스는 구멍축에 대해서 360°/N의 간격으로 배열됨을 특징으로 하는 뼈플레이트(1).
- 제 1 항 내지 제 6 항 중 어느 한 항에 있어서, 상기 리세스(6)가 적어도 1°의 외주간격을 갖는 것을 특징으로 하는 뼈플레이트(1).
- 제 1 항 내지 제 7 항 중 어느 한 항에 있어서, 상기 리세스(6)가 최대 119°의 외주간격을 갖는 것을 특징으로 하는 뼈플레이트(1).
- 제 1 항 내지 제 8 항 중 어느 한 항에 있어서, 상기 리세스(6)는 상기 내부재킷표면(4) 내에서 독립적으로 연장됨을 특징으로 하는 뼈플레이트(1).
- 제 1 항 내지 제 9 항 중 어느 한 항에 있어서, 상기 리세스(6)는 상기 내부재킷표면(4)을 지나서 상기 구멍축(5)으로부터 방사상으로 연장됨을 특징으로 하는 뼈플레이트(1).
- 제 1 항 내지 제 10 항 중 어느 한 항에 있어서, N개의 상기 리세스(6)가 상 기 내부재킷표면(4)을 N개의 재킷표면의 구획으로 나누는 것을 특징으로 하는 뼈플레이트(1).
- 제 1 항 내지 제 11 항 중 어느 한 항에 있어서, 상기 리세스(6)는 상기 상면(8)으로부터 상기 하면(2)으로 원통형이나 테이퍼지게 연장됨을 특징으로 하는 뼈플레이트(1).
- 제 1 항 내지 제 12 항 중 어느 한 항에 있어서, 상기 리세스(6)는 상기 상면(8)으로부터 상기 하면(2)으로 상기 뼈플레이트(1)의 전체 높이에 걸쳐 연장됨을 특징으로 하는 뼈플레이트(1).
- 제 1 항 내지 제 13 항 중 어느 한 항에 있어서, 강철 또는 티타늄으로 만들어짐을 특징으로 하는 뼈플레이트(1).
- 제 5 항 내지 제 14 항 중 어느 한 항에 있어서, 상기 내부재킷표면(4)은 여러줄나사를 구비함을 특징으로 하는 뼈플레이트(1).
- 제 5 항 내지 제 15 항 중 어느 한 항에 있어서, 상기 내부재킷표면(4)은 상기 구멍축(5)에 직각으로 외주에 연속적인 리브를 구비함을 특징으로 하는 뼈플레이트(1).
- 제 1 항 내지 제 16 항 중 어느 한 항에 있어서, 플라스틱 재질로 만들어짐을 특징으로 하는 뼈플레이트(1).
- 제 1 항 내지 제 17 항 중 어느 한 항에 있어서, 40~70%의 파단신율과 3000~6000N/㎟의 탄성율을 갖는 폴리아크릴 에테르케톤(PEAK) 또는 폴리에테르 에테르케톤(PEEK)으로 만들어짐을 특징으로 하는 뼈플레이트(1).
- 제 1 항 내지 제 17 항 중 어느 한 항에 있어서, 80~120%의 파단신율과 2000~3500N/㎟의 탄성율을 갖는 폴리술폰(polysulphon)으로 만들어짐을 특징으로 하는 뼈플레이트(1).
- 제 1 항 내지 제 17 항 중 어느 한 항에 있어서, 1.5~2.5%의 파단신율과 5000~20000N/㎟의 탄성율을 갖는 액정고분자(lipuid crystal polymer LCP)로 만들어짐을 특징으로 하는 뼈플레이트(1)
- 제 1 항 내지 제 17 항 중 어느 한 항에 있어서, 10~50%의 파단신율과 2000~3500N/㎟의 탄성율을 갖는 폴리옥시메틸렌(polyoxymethylene POM)으로 만들어짐을 특징으로 하는 뼈플레이트(1).
- 제 1 항 내지 제 17 항 중 어느 한 항에 있어서, 0.2~1.0%의 파단신율과 12000~20000N/㎟의 탄성율을 갖는 폴리페닐렌술피드(polyphenylenesulphide PPS)로 만들어짐을 특징으로 하는 뼈플레이트(1).
- 제 1 항 내지 제 17 항 중 어느 한 항에 있어서, 금속, 플라스틱, 또는 탄소섬유로 강화된 플라스틱 재질로 만들어짐을 특징으로 하는 뼈플레이트(1).
- 제 1 항 내지 제 23 항 중 어느 한 항에 있어서, 상기 플레이트(1)의 적어도 하나의 구멍(3)에 각도상 안정되게 체결되기에 적당한 테이퍼진 머리부분(11)을 갖는 적어도 하나의 뼈나사(10)와 뼈에 부착하기 위한 나사산부분(12)을 포함하여 구성됨을 특징으로 하는 뼈플레이트(1)
- 제 24 항에 있어서, 상기 머리부분(11)은 철면(convex), 바람직하게는 구형 또는 테이퍼진 구조를 형성함을 특징으로 하는 뼈플레이트(1).
- 제 24 항 또는 제 25 항에 있어서, 상기 머리부분(11)은 3차원구조(13)를 구비함을 특징으로 하는 뼈플레이트(1).
- 제 24 항 내지 제 26 항 중 어느 한 항에 있어서, 상기 뼈나사(10)의 상기 머리부분(11)은 상기 내부재킷표면(4)보다 더 단단한 재질로 만들어짐을 특징으로 하는 뼈플레이트(1).
- 제 24 항 내지 제 27 항 중 어느 한 항에 있어서, 상기 내부재킷표면(4)과 상기 뼈나사(10)의 상기 머리부분(11)은 결합하는 나사산을 형성함을 특징으로 하는 뼈플레이트(1).
- 제 16 항 내지 제 28 항 중 어느 한 항에 있어서, 상기 플레이트(1)의 적어도 하나의 구멍(3)은 금속 나사산삽입물(9)로 구성됨을 특징으로 하는 뼈플레이트(1).
- 제 1 항 내지 제 28 항 중 어느 한 항에 있어서, 금속재질로 만들어지며 상기 플레이트(1)의 적어도 하나의 구멍(3)은 중합체 나사산삽입물(9)로 구성됨을 특징으로 하는 뼈플레이트(1).
- 제 1 항 내지 제 30 항 중 어느 한 항에 있어서, 뼈플레이트(1)의 상기 구멍(3)과 접촉하도록 유도되는 첨단부가 상기 플레이트 안에 상기 구멍(3)의 상기 내부재킷표면(4)의 빈 구조를 형성함을 특징으로 하는 상기 뼈플레이트(1)와 함께 사용되는 드릴링 부시.
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DE (6) | DE20321244U1 (ko) |
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2004
- 2004-08-18 TW TW93124767A patent/TWI329506B/zh not_active IP Right Cessation
- 2004-08-25 CL CL2004002168A patent/CL2004002168A1/es unknown
- 2004-08-25 AR ARP040103052 patent/AR045493A1/es not_active Application Discontinuation
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2006
- 2006-02-24 US US11/361,942 patent/US8343196B2/en active Active
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2012
- 2012-12-13 US US13/713,626 patent/US8845698B2/en not_active Expired - Lifetime
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2013
- 2013-03-12 US US13/795,806 patent/US8852245B2/en not_active Expired - Lifetime
- 2013-03-12 US US13/795,596 patent/US8876873B2/en not_active Expired - Lifetime
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2014
- 2014-10-03 US US14/505,625 patent/US9295505B2/en not_active Expired - Fee Related
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2016
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20130103666A (ko) * | 2010-06-02 | 2013-09-24 | 신세스 게엠바하 | 뼈 플레이트 |
KR101347703B1 (ko) * | 2012-03-08 | 2014-01-08 | 중앙대학교 산학협력단 | 골절 치료용 뼈 플레이트 및 이의 제조 방법 |
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