Distractor for use in spinal surgery
First Claim
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1. A distractor, comprising:
- a distraction head having a longitudinal axis and a first pair of opposed surfaces extending substantially along said longitudinal axis and defining a first working distraction height approximating a normal disc space height and a second pair of opposed surfaces extending substantially along said longitudinal axis and defining a second working distraction height approximating a second normal disc space height, said distraction head rotatable between said first distraction height and said second distraction height by rotating the distraction head about said longitudinal axis.
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Abstract
Apparatus and a method of inserting spinal implants is disclosed in which an intervertebral space is first distracted, a hollow sleeve having teeth at one end is then driven into the vertebrae adjacent that disc space. A drill is then passed through the hollow sleeve removing disc and bone in preparation for receiving the spinal implant which is then inserted through the sleeve.
129 Citations
31 Claims
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1. A distractor, comprising:
- a distraction head having a longitudinal axis and a first pair of opposed surfaces extending substantially along said longitudinal axis and defining a first working distraction height approximating a normal disc space height and a second pair of opposed surfaces extending substantially along said longitudinal axis and defining a second working distraction height approximating a second normal disc space height, said distraction head rotatable between said first distraction height and said second distraction height by rotating the distraction head about said longitudinal axis.
- View Dependent Claims (2, 3, 4, 5, 6)
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7. A spinal distractor for use in spinal surgery for temporarily positioning two adjacent vertebral bodies in selected relationship to restore the height of the disc space therebetween prior to inserting an implant into the distracted disc space, said spinal distractor comprising:
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a body having a proximal end, a distal end opposite said proximal end, and a mid-longitudinal axis therebetween; and
an extension extending from said distal end of said body and configured to contact the adjacent vertebral bodies upon insertion into the disc space between the two adjacent vertebral bodies, said extension being removably attached to said body, said extension being adapted to bear against adjacent endplates of the two adjacent vertebral bodies, said extension having a first portion for bearing against one of the adjacent endplates and a second portion for bearing against the other of the adjacent endplates to maintain the adjacent vertebral bodies in selected relationship, said extension having a height no greater than the surgically corrected height of the disc space, said distal end of said body being configured to prevent said body from entering the disc space between the endplates of the adjacent vertebral bodies when said extension is inserted into the disc space. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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Specification