Patent ID: 8277453
Filing Date: 2012-10-02
Classification: A61B

Abstract:
1. A system for correcting alignment of one or more vertebrae of a spine, comprising: first and second implants engageable to at least one vertebra, said first and second implants being configured for engagement with at least one elongated stabilization element positionable along the one or more vertebrae of the spine; a derotation instrument set including: first and second elongated implant extensions with distal end portion releasably engaged to respective ones of said first and second implants, said implant extensions each extending from said distal end portion thereof to an opposite proximal end portion; a transverse linking assembly positioned between and engaged to said first and second implant extensions at said proximal end portions, said transverse linking assembly including an elongate link member with a central plate portion extending between said proximal end portions of said implant extensions, said linking assembly further including a derotation handle engaged to said central plate portion and first and second mounting assemblies engaged to said central plate portion and to said proximal end portion of a respective one of said first and second implant extensions, said mounting assemblies each including first and second plate members along opposite sides of said central plate portion and a pivotable ball member captured between said first and second plate members that receives said proximal end portion of a respective one of said extensions; said first and second plate members each include opposite sides that extend from a first end wall to an opposite second end wall, said first end of said first plate member including a receptacle opening at said first end wall and said first end of said second plate member including a hook member positioned in said receptacle to pivotally couple said first ends of said first and second plate members to one another; and wherein each of said first and second mounting assemblies includes a cam assembly adjacent said second ends of said first and second plate members, said cam assembly having a first position wherein said first and second plate members are released from said side members to allow said mounting assembly to translate along said central plate portion and said cam assembly is movable to a second position wherein said cam assembly forces said first and second plate members and said central plate portion into clamping engagement with said ball member.