Method and apparatus for spinal fixation
First Claim
1. An apparatus for fixation of a spine, the apparatus comprising:
- a linkage having a longitudinal axis;
a hook member including an upper portion and a lower portion, said lower portion having a curved shape for engaging a portion of the spine, the upper portion defining an aperture; and
a coupling arrangement interconnecting said linkage and said hook member, said coupling arrangement including a shaft threadably interconnecting said linkage and said hook member and oriented substantially perpendicular to said longitudinal axis of said linkage, said coupling arrangement operative to selectively permit universal movement of said hook member relative to said linkage, said coupling arrangement including a locking member disposed in said aperture and carried by said shaft.
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0 Petitions
Accused Products
Abstract
An apparatus for a spinal fixation generally includes a hook member and a linkage. The hook member includes an upper portion and a lower portion. The lower portion has a generally arcuate shape and defines an aperture passing therethrough. The lower portion has a curved shape for engaging the lamina. The linkage includes a generally flat plate and defines an arcuate service for matingly receiving the upper portion of the hook member so as to permit relative rotation therebetween. The apparatus further includes a coupling arrangement including a shaft passing through the recess of the linkage and an aperture of the hook member. The shaft includes an upper end and a lower end. A locking member is carried by a lower end and disposed within an aperture of the hook member. A nut is provided in threaded engagement with the upper end of the shaft.
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Citations
20 Claims
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1. An apparatus for fixation of a spine, the apparatus comprising:
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a linkage having a longitudinal axis;
a hook member including an upper portion and a lower portion, said lower portion having a curved shape for engaging a portion of the spine, the upper portion defining an aperture; and
a coupling arrangement interconnecting said linkage and said hook member, said coupling arrangement including a shaft threadably interconnecting said linkage and said hook member and oriented substantially perpendicular to said longitudinal axis of said linkage, said coupling arrangement operative to selectively permit universal movement of said hook member relative to said linkage, said coupling arrangement including a locking member disposed in said aperture and carried by said shaft. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An apparatus for fixation of a spine, the apparatus comprising:
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a hook member including an upper portion and a lower portion, said lower portion having a curved shape for engaging a portion of the spine;
a linkage including a generally cylindrical rod and a rod clamping member, said linkage defining a longitudinal axis; and
a coupling arrangement interconnecting said linkage and said hook member so as to selectively permit universal movement of said hook member relative to said linkage, said coupling arrangement including a shaft threadably interconnecting said linkage and said hook member and oriented substantially perpendicular to said longitudinal axis of said linkage;
wherein said rod clamping member includes an upper flange and a lower flange, said lower flange comprising said adjacent surface of said linkage, said upper flange defining a partially cylindrical recess receiving a locking nut threadably receiving an upper portion of said shaft. - View Dependent Claims (8, 9, 10, 11, 12)
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13. An apparatus for fixation of a spine, the apparatus comprising:
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a linkage having a longitudinal axis;
a hook member including an upper portion and a lower portion, said lower portion having a curved shape for engaging a portion of the spine; and
a coupling arrangement interconnecting said linkage and said hook member, said coupling arrangement including a shaft threadably interconnecting said linkage and said hook member and oriented substantially perpendicular to the longitudinal axis at the linkage, said coupling arrangement operative to selectively permit universal movement of said hook member relative to said linkage;
wherein said linkage further includes a generally flat plate and a cap removably attached to said generally flat plate, said cap defining a partially spherical recess matingly engaging said upper portion and including an aperture for receiving said shaft.
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14. An apparatus for fixation of a portion of a spine, the apparatus comprising:
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a hook member including a partially spherical upper portion and a lower portion having a curved shape for engaging a portion of the spine;
a linkage defining a longitudinal axis; and
a coupling arrangement interconnecting said linkage and said hook member, said coupling arrangement including a shaft defining a shaft axis threadably interconnecting said linkage and said hook member and oriented generally substantially perpendicular to said linkage, said coupling arrangement operative to selectively permit universal movement of said hook member relative to said linkage about said shaft axis;
wherein said coupling arrangement further includes a locking nut having engaged an upper portion of said shaft, said locking nut having a spherical portion matingly received within a recess in an upper surface of said linkage. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification