Methods and devices for interbody spinal stabilization
First Claim
Patent Images
1. A method for performing spinal surgery, comprising:
- accessing a disc space between adjacent vertebrae;
performing a discectomy in the interspace;
inserting an enlargeable portion of a distractor into the disc space;
enlarging the enlargeable portion of the distractor to distract the disc space to a desired disc space height, wherein the enlarged enlargeable portion is sized to form a void in the disc space between the annulus and an exterior surface of the enlarged enlargeable portion; and
placing a material into the void.
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Abstract
Methods and instruments for preparing a disc space and for forming interbody devices therein are provided. The instruments include distractors having enlargeable portions positionable in the disc space for distracting the disc space. The enlargeable portions can also provide form about or against which an interbody device of a first material is placed. A second material may be placed in the disc space in the space previously occupied by the distractors.
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Citations
47 Claims
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1. A method for performing spinal surgery, comprising:
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accessing a disc space between adjacent vertebrae;
performing a discectomy in the interspace;
inserting an enlargeable portion of a distractor into the disc space;
enlarging the enlargeable portion of the distractor to distract the disc space to a desired disc space height, wherein the enlarged enlargeable portion is sized to form a void in the disc space between the annulus and an exterior surface of the enlarged enlargeable portion; and
placing a material into the void. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method for performing spinal surgery in an interspace between adjacent vertebrae, comprising:
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providing a distractor having an inflatable distal end portion defining upper and lower vertebral endplate contact surfaces having a predetermined area;
inserting the inflatable distal end portion of the distractor into the interspace;
inflating the distal end portion of the distractor to distract the interspace to a desired interspace height, wherein a void is formed in the interspace between the annulus and the inflated portion; and
placing material into the void.
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22. A method for performing spinal surgery, comprising:
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accessing a disc space between adjacent vertebrae;
performing a discectomy in the interspace;
inserting an enlargeable portion of a distractor into the disc space;
enlarging the enlargeable portion of the distractor to distract the disc space to a desired disc space height, wherein the enlarged enlargeable portion is sized to form a void in the disc space between the annulus and an exterior surface of the enlarged enlargeable portion;
placing a material into the void;
reducing the size of the enlargeable portion of the distractor after the material is placed; and
removing the reduced enlargeable portion of the distractor from the disc space.
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23. A method for performing spinal surgery in an interspace between adjacent vertebrae, comprising:
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providing a distractor having an inflatable distal end portion defining upper and lower vertebral endplate contact surfaces having a predetermined area;
inserting the inflatable distal end portion of the distractor into the interspace;
inflating the distal end portion of the distractor to distract the interspace to a desired interspace height, wherein a void is formed in the interspace between the annulus and the inflated portion;
placing material into the void. reducing the size of the enlargeable portion of the distractor after the material is placed; and
removing the reduced enlargeable portion of the distractor from the disc space
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24. A method for performing spinal surgery in the disc space between adjacent vertebrae, comprising:
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providing a first distractor having an inflatable distal end portion defining upper and lower vertebral endplate contact surfaces;
accessing the disc space from at least one access port;
inserting the inflatable distal end portion of the first distractor into the disc space through the at least one access port;
inserting the inflatable distal end portion of the second distractor into the disc space through the at least one access port; and
inflating the first and second distal end portions to distract the disc space. - View Dependent Claims (25, 26, 27, 28, 29)
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30. A method for performing spinal surgery, comprising:
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preparing a spinal disc space for insertion of a form;
positioning the form in the spinal disc space wherein a void is formed around the form;
placing a first material in the void and in contact with the vertebral endplates on either side of the spinal disc space;
removing the form; and
placing a second material in the position that was occupied by the removed form. - View Dependent Claims (31, 32, 33)
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34. A method for performing spinal surgery, comprising:
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preparing a spinal disc space for placement of a first material therein;
forming a void in the spinal disc space;
placing a first material in the void and in contact with vertebral endplates on either side of the spinal disc space and in contact with an inner annulus wall;
forming a cavity in the first material; and
placing a second material in the cavity. - View Dependent Claims (35, 36)
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37. A spinal surgical instrument for distracting a disc space, comprising:
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a shaft extending between a proximal end and a distal end; and
an inflatable portion adjacent said distal end, said inflatable portion having a reduced size configuration for insertion into the disc space and an enlarged inflated configuration, wherein when in said inflated configuration said inflatable portion defines an upper vertebral endplate contacting surface and an opposite lower vertebral endplate contacting surface, each of said upper and lower vertebral endplate contacting surfaces having a vertebral endplate contacting area in the range of 0.1 square inches to 0.5 square inches. - View Dependent Claims (38, 39, 40, 41, 42, 43)
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44. A spinal surgical device implantable in a disc space, comprising:
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a shaft extending between a proximal end and a distal end; and
an inflatable portion adjacent said distal end, said inflatable portion having a reduced size configuration for insertion into the disc space and an enlarged inflated configuration, wherein when in said inflated configuration said inflatable portion is sized to contact vertebral endplates adjacent the disc space and restore the disc space to a desired disc space height, said inflatable portion is further sized and shaped in the anterior, posterior and lateral directions to occupy the disc space with a void formed between the inflatable portion and an inner wall of an annulus surrounding the disc space annulus; and
a first material in the void. - View Dependent Claims (45, 46, 47)
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Specification