QUICK-LOCK DRIVER FOR A BONE SCREW
First Claim
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1. A driver instrument adapted to engage and drive bone screw assemblies which include a bone screw and an associated housing, said driver instrument comprising:
- an elongate shaft having a proximal end and a distal end, the distal end further comprising;
a driver engagement feature adapted to engage and rotationally drive a head of a bone screw andone or more lugs protruding radially therefrom,said one or more lugs being adapted to engage a housing of a bone screw assembly to limit axial rotation thereof relative to said elongate shaft; and
a sleeve having a proximal end, a distal end, and being adapted for coaxial rotation about a common longitudinal axis with the elongate shaft,wherein the distal end of the sleeve includes an engagement feature adapted to rotationally engage a mating engagement feature of the housing of a bone screw assembly.
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Abstract
A driver instrument for engaging and transferring rotational torque to a bone screw assembly which includes a shaft and sleeve adapted to engage and couple the bone screw assembly into a single coaxial unit while the bone screw assembly is being driven into a bone and then to release the bone screw assembly from the driver instrument. The driver instrument includes an elongate shaft, a sleeve, and bone screw assembly engaging features on the elongate shaft and/or the sleeve.
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Citations
20 Claims
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1. A driver instrument adapted to engage and drive bone screw assemblies which include a bone screw and an associated housing, said driver instrument comprising:
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an elongate shaft having a proximal end and a distal end, the distal end further comprising; a driver engagement feature adapted to engage and rotationally drive a head of a bone screw and one or more lugs protruding radially therefrom, said one or more lugs being adapted to engage a housing of a bone screw assembly to limit axial rotation thereof relative to said elongate shaft; and a sleeve having a proximal end, a distal end, and being adapted for coaxial rotation about a common longitudinal axis with the elongate shaft, wherein the distal end of the sleeve includes an engagement feature adapted to rotationally engage a mating engagement feature of the housing of a bone screw assembly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of engaging and a driver instrument with a bone screw assembly comprising:
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inserting a distal tip of a driver instrument having an elongate shaft including a driver engagement feature into a driver socket of a bone screw of a bone screw assembly; inserting one or more lugs of the elongate shaft into mating channels of a housing of the bone screw assembly, wherein inserting one or more lugs of the elongate shaft into mating channels of the housing of the bone screw assembly limits rotation of the housing relative to the elongate shaft; inserting a sleeve coaxially disposed about the elongate shaft into the housing of the bone screw assembly with the sleeve in a first position, said sleeve including an engagement feature being adapted to rotationally engage a mating engagement feature of the housing of the bone screw assembly; and rotating the sleeve relative to the elongate shaft and the housing of the bone screw assembly to a second position while positioned in the housing of the bone screw assembly, wherein upon relative rotation of the sleeve with respect to the elongate shaft, the engagement feature of the sleeve couples with the mating engagement feature of the housing of the bone screw assembly. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification