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| 국가/구분 | United States(US) Patent 등록 |
|---|---|
| 국제특허분류(IPC7판) |
|
| 출원번호 | US-0223119 (1994-04-05) |
| 발명자 / 주소 |
|
| 출원인 / 주소 |
|
| 인용정보 | 피인용 횟수 : 588 인용 특허 : 0 |
A disk arthroplasty device (310) is provided for replacement of a spinal disk. The device is implantable into a resected disk space and is formed with ball (346) and socket (326) members and shaped to provide lateral bending and backward extension of up to about 5°and forward flexion of up to about
A disk arthroplasty device (310) is provided for replacement of a spinal disk. The device is implantable into a resected disk space and is formed with ball (346) and socket (326) members and shaped to provide lateral bending and backward extension of up to about 5°and forward flexion of up to about 15°. Four embodiments (10), (110), (210) and (310) permit up to about 5°axial rotation and a fifth embodiment (410) permits unrestricted axial rotation. Metal insert cups (70) and (170) are provided for attaching to the device surfaces and are convexly shaped along one axis to conform to the natural contours of the top and bottom vertebra surfaces. The metal insert cups (70) and (170) provide tensile support to the structure and provide for the attachment of additional structures for retaining the device in position after implantation into a disk space.
An intervertebral disk arthroplasty device adapted to replace a disk between a first vertebra and a second vertebra in a spine, said arthroplasty device comprising: a first member for engaging the first vertebra having a first joint surface, a first posterior end and a first anterior end, said ends
An intervertebral disk arthroplasty device adapted to replace a disk between a first vertebra and a second vertebra in a spine, said arthroplasty device comprising: a first member for engaging the first vertebra having a first joint surface, a first posterior end and a first anterior end, said ends defining a transverse midline therebetween, said midline being equidistant from said first posterior end and said first anterior end; a second member for engaging the second vertebra having a second joint surface facing said first joint surface, and second posterior and anterior ends juxtaposed with corresponding ones of said first posterior and anterior ends; and a ball and socket joint between said first and second members defined in said first and second joint surfaces and disposed between said midline and said first posterior end, said ball and socket joint configured to permit relative rotation between said first member and said second member about a first axis parallel to said transverse midline and a second axis perpendicular to said first axis and lying in a sagittal plane of the spine, wherein one of said first and second joint surfaces is inclined away from said ball and socket joint toward its respective first or second joint member, entirely around said joint, and the other of said first and second joint surfaces is substantially parallel to a plane defined by said first and second axes around said joint.
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