Femoral ring loader
First Claim
Patent Images
1. An instrument for inserting an implant between vertebral bodies, comprising:
- a holder adapted to hold the implant during insertion of the implant between the vertebral bodies;
a retractor adapted to retract the holder away from the implant after the insertion; and
a guard adapted to prevent the implant from being removed from between the vertebral bodies during the retraction;
wherein the guard comprises a shaft having a longitudinal axis, a proximal end having an engagement surface, and a distal end;
the holder comprises a plurality of arms, each having a proximal end and a distal end and each longitudinally extending alongside the shaft, the arms being adapted to cooperate to hold the implant using the distal ends of the arms such that the implant is longitudinally adjacent the distal end of the shaft during insertion of the implant between the vertebral bodies;
the retractor comprises a bore in longitudinally fixed relation to the arms during the retraction and having a longitudinal axis coaxial with the longitudinal axis of the shaft during the retraction, and a screw that can thread within the bore and having a distal end that can engage the engagement surface of the proximal end of the shaft during the retraction;
rotation of the screw within the bore, after the insertion of the implant between the vertebral bodies and once the distal end of the screw has engaged the engagement surface of the shaft, effects the retraction by pulling the arms alongside the shaft until the distal ends of the arms no longer hold the implant; and
wherein during the retraction, the distal end of the shaft can engage the implant to prevent the implant from being removed from between the vertebral bodies.
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Abstract
An instrument for inserting an implant between vertebral bodies, including a holder adapted to hold the implant during insertion of the implant between the vertebral bodies, a retractor adapted to retract the holder away from the implant after the insertion, and a guard adapted to prevent the implant from being removed from between the vertebral bodies during the retraction.
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Citations
20 Claims
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1. An instrument for inserting an implant between vertebral bodies, comprising:
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a holder adapted to hold the implant during insertion of the implant between the vertebral bodies;
a retractor adapted to retract the holder away from the implant after the insertion; and
a guard adapted to prevent the implant from being removed from between the vertebral bodies during the retraction;
whereinthe guard comprises a shaft having a longitudinal axis, a proximal end having an engagement surface, and a distal end;
the holder comprises a plurality of arms, each having a proximal end and a distal end and each longitudinally extending alongside the shaft, the arms being adapted to cooperate to hold the implant using the distal ends of the arms such that the implant is longitudinally adjacent the distal end of the shaft during insertion of the implant between the vertebral bodies;
the retractor comprises a bore in longitudinally fixed relation to the arms during the retraction and having a longitudinal axis coaxial with the longitudinal axis of the shaft during the retraction, and a screw that can thread within the bore and having a distal end that can engage the engagement surface of the proximal end of the shaft during the retraction;
rotation of the screw within the bore, after the insertion of the implant between the vertebral bodies and once the distal end of the screw has engaged the engagement surface of the shaft, effects the retraction by pulling the arms alongside the shaft until the distal ends of the arms no longer hold the implant; and
whereinduring the retraction, the distal end of the shaft can engage the implant to prevent the implant from being removed from between the vertebral bodies. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An instrument for inserting a implant between vertebral bodies, comprising:
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a set of tongs having a proximal end and distal ends adapted to hold the implant during the insertion of the implant between the vertebral bodies;
a central rod about which the set of tongs can open and close, having a proximal end and a distal end in front of which the distal ends of the set of tongs can hold the implant during the insertion, the rod being coupled to the set of tongs to prevent lateral movement between the rod and the set and allow longitudinal movement between the rod and the set; and
a screw assembly at the proximal end of the set of tongs adapted to retract the distal ends of the set of tongs away from the implant after the insertion while allowing the distal end of the rod to be maintained against the implant during the retraction to prevent the implant from being removed from between the vertebral bodies during the retraction;
whereinthe screw assembly comprises a bore longitudinally fixed to the set of tongs during the retraction and aligned with the rod during the retraction, and a screw that can be rotated within the bore to engage the proximal end of the rod during the retraction and pull the set of tongs longitudinally relative to the shaft until the distal ends of the set of tongs no longer hold the implant. - View Dependent Claims (19, 20)
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Specification