Dynamic stabilization device

摘要

A surgical implant device for controlling the movement between a first bone or tissue portion and a second bone or tissue portion includes a first elongated member connectable for movement with the first bone or tissue portion and a second elongated member connectable for movement with the first bone or tissue portion. The first elongated member and the second elongated member are connected by a flexible joint configured to allow the first elongated member to pivot, move axially, and/or rotate relative to the second elongated member. At least one resilient member is associated with the flexible joint to resist relative movement of the first elongated member relative to the second elongated member.

主权项

1. A surgical implant device for use in a motion preservation system, comprising:
a first elongated member having a first end and a second end; a second elongated member having a first end and a second end, wherein the second end of the first elongated member is adjacent the first end of the second elongated member; a housing having a first end and a second end, the first end of the housing being connected to the first end of the second elongated member, the second end of the housing defining an opening, wherein the second end of the first elongated member is disposed within the housing such that the first elongated member is axially movable and pivotally movable relative to the second elongated member; a flange disposed around the first elongated member in the housing; resilient members disposed concentrically around the first elongated member in respective grooves on each side of the flange in the housing, wherein the resilient members resist relative movement of the first elongated member relative to the second elongated member, and wherein one of the resilient members and respective grooves is an end resilient member and an end groove, the end resilient member being disposed in the end groove, the end resilient member protruding beyond an end face of the first elongated member and contacting an end face of the second elongated member; and a stop surface adjacent the opening that limits the relative pivotal movement of the first elongated member relative to the second elongated member.