Spinal disc prosthesis and methods of use
First Claim
1. A prosthetic device for approximating spinal disc movement wherein said device can be implanted in the spine and engaged between a first and second vertebrae, such that when said device is implanted in the spine and engaged with a first and second vertebra, said device forms an interlocking kinematic chain between said first and second vertebra, wherein said kinematic chain comprises:
- an axial spring;
a lateral sleeve attached to one end of said axial spring;
a lateral rod disposed within said lateral sleeve;
a lateral cylindrical joint platform in which said lateral sleeve is movably engaged and said lateral rod is positioned, such that said lateral sleeve can slide along the lateral rod and rotate about the lateral rod within the lateral cylindrical joint platform;
a sagittal sleeve attached to the opposite end of the axial spring;
a sagittal rod disposed within said sagittal sleeve; and
a sagittal cylindrical joint platform in which said sagittal sleeve is movably engaged and said sagittal rod is fixedly positioned, such that said sagittal sleeve can slide along the sagittal rod and rotate about the sagittal rod within the sagittal cylindrical joint platform;
such that there is provided up to three independent rotational degrees of freedom and up to three independent linear degrees of freedom.
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Accused Products
Abstract
Spinal disc prosthetic devices are provided having up to six-degrees-of-freedom with three rotational and three translational degrees-of-freedom within the entire workspace of a Functional Spinal Unit (FSU). Certain embodiments of the prosthetic disc mechanisms attach to upper and lower plates anchored between vertebrae of an FSU allowing modularity of the devices. Scaling, conjoined mechanical programmability allow the devices to realize almost any nominal required spinal articulation, from the cervical to lumbar regions.
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Citations
64 Claims
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1. A prosthetic device for approximating spinal disc movement wherein said device can be implanted in the spine and engaged between a first and second vertebrae, such that when said device is implanted in the spine and engaged with a first and second vertebra, said device forms an interlocking kinematic chain between said first and second vertebra, wherein said kinematic chain comprises:
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an axial spring; a lateral sleeve attached to one end of said axial spring; a lateral rod disposed within said lateral sleeve; a lateral cylindrical joint platform in which said lateral sleeve is movably engaged and said lateral rod is positioned, such that said lateral sleeve can slide along the lateral rod and rotate about the lateral rod within the lateral cylindrical joint platform; a sagittal sleeve attached to the opposite end of the axial spring; a sagittal rod disposed within said sagittal sleeve; and a sagittal cylindrical joint platform in which said sagittal sleeve is movably engaged and said sagittal rod is fixedly positioned, such that said sagittal sleeve can slide along the sagittal rod and rotate about the sagittal rod within the sagittal cylindrical joint platform; such that there is provided up to three independent rotational degrees of freedom and up to three independent linear degrees of freedom. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 17, 18, 19, 20, 21, 22, 23)
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16. A prosthetic device for approximating spinal disc movement wherein said device can be implanted in the spine and engaged between a first and second vertebrae, such that when said device is implanted in the spine and engaged between a first and second vertebra, said device forms an interlocking kinematic chain between said first and second vertebra, wherein said interlocking kinematic chain comprises:
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an axial spring; a lateral sleeve, having at least one aperture therein, fixedly attached to one end of said axial spring; a lateral spring, disposed within said lateral sleeve, having at least one tang fixedly attached thereon and positioned within the at least one aperture of said lateral sleeve; a lateral cylindrical joint platform in which said lateral sleeve is movably engaged and the ends of said lateral spring are fixedly positioned, such that said lateral sleeve can slide along the lateral spring and can rotate about said lateral spring whereby said at least one tang can contact one or more sides of the at least one aperture causing torquing of the lateral spring; a sagittal sleeve, having at least one aperture therein, fixedly attached to the opposite end of the axial spring; a sagittal spring, disposed within said sagittal sleeve, having at least one tang fixedly attached thereon and positioned within the at least one aperture of said lateral sleeve; and a sagittal cylindrical joint platform in which said sagittal sleeve is movably engaged and the ends of said sagittal spring are fixedly positioned, such that said sagittal sleeve can slide along the sagittal spring and can rotate about said sagittal spring whereby said at least one tang can contact one or more sides of the at least one aperture causing torquing of the sagittal spring; such that there is provided up to three independent rotational degrees of freedom and up to three independent linear degrees of freedom. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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39. A prosthetic device for approximating spinal disc movement wherein said device can be implanted in the spine between a first and second vertebrae, such that when said device is implanted in the spine and engaged with a first and second vertebra, said device forms an interlocking kinematic chain between said first and second vertebra, wherein said interlocking kinematic chain comprises:
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an axial spring; a lateral rocker-slider fixedly attached to one end of said axial spring, wherein the lateral rocker-slider comprises a first joint shaft slidably disposed within a first sleeve; a lateral cylindrical joint platform in which said lateral rocker-slider is movably attached within a lateral joint axis such that the lateral rocker-slider sleeve can slide along the lateral joint axis and rotate or rock about the lateral joint axis; a sagittal rocker-slider fixedly attached to the opposite end of the axial spring, wherein the sagittal rocker slider comprises a second joint shaft slidably disposed within a second sleeve; a sagittal cylindrical joint platform in which said sagittal rocker-slider is movably attached within a sagittal joint axis such that the sagittal rocker-slider sleeve can slide along the sagittal joint axis and rotate or rock about the sagittal joint axis; such that there is provided up to three independent rotational degrees of freedom and up to three independent linear degrees of freedom. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63)
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64. A method for approximating spinal disc movement utilizing a device comprising:
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an axial spring; a lateral rocker-slider fixedly attached to one end of said axial spring, wherein the lateral rocker-slider comprises a first joint shaft slidably disposed within a first sleeve; a lateral cylindrical joint platform in which said lateral rocker-slider is movably attached within a lateral joint axis such that the lateral rocker-slider sleeve can slide along the lateral joint axis and rotate or rock about the lateral joint axis; a sagittal rocker-slider fixedly attached to the opposite end of the axial spring, wherein he sagittal rocker-slider comprises a second joint shaft slidably disposed within a first sleeve; a sagittal cylindrical joint platform in which said sagittal rocker-slider is movably attached within a sagittal joint axis such that the sagittal rocker-slider sleeve can slide along the sagittal joint axis and rotate or rock about the sagittal joint axis; said method comprising implanting the device between a first and second vertebrae, such that with said device engaged between the first and second vertebrae, there is formed a kinematic chain between the first and second vertebrae, such that there is provided at least one and up to three independent rotational degrees of freedom and at least one and up to three independent linear degrees of freedom.
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Specification