Self Centering Nucleus Implant
First Claim
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1. An intervertebral disc augmentation implant for implantation between a pair of vertebral bodies comprising:
- an elastically deformable outer casing having at least one thickness dimension; and
a core member having isotropic material properties and entirely encased within the outer casing and having a height dimension along an axis defined by the pair of vertebral bodies,wherein a modulus of elasticity of the core member is greater than a modulus of elasticity of the outer casing and further wherein the height dimension of the core member is greater than the at least one thickness dimension of the outer casing.
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Abstract
An intervertebral disc augmentation implant for implantation between a pair of vertebral bodies comprises an elastically deformable outer casing having at least one thickness dimension and a core member having isotropic material properties. The core member is entirely encased within the outer casing and has a height dimension along an axis defined by the pair of vertebral bodies. The modulus of elasticity of the core member is greater than a modulus of elasticity of the outer casing, and the height dimension of the core member is greater than the at least one thickness dimension of the outer casing.
142 Citations
33 Claims
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1. An intervertebral disc augmentation implant for implantation between a pair of vertebral bodies comprising:
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an elastically deformable outer casing having at least one thickness dimension; and a core member having isotropic material properties and entirely encased within the outer casing and having a height dimension along an axis defined by the pair of vertebral bodies, wherein a modulus of elasticity of the core member is greater than a modulus of elasticity of the outer casing and further wherein the height dimension of the core member is greater than the at least one thickness dimension of the outer casing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A method of replacing a nucleus of an intervertebral disc located between a pair of vertebral bodies, the method comprising:
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accessing an annulus surrounding the nucleus; forming an opening in the annulus; and inserting an intervertebral nucleus replacement implant wherein the implant comprises an elastically deformable outer casing having at least one thickness dimension; and an isotropic core member entirely encased within the outer casing and having a height dimension along an axis defined by the pair of vertebral bodies, wherein a modulus of elasticity of the core member is greater than a modulus of elasticity of the outer casing and further wherein the height dimension of the core member is greater than the at least one thickness dimension of the outer casing. - View Dependent Claims (25, 26)
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27. An implant for replacing at least a portion of a nucleus of an intervertebral disc between a pair of vertebral bodies, the implant comprising:
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an elastically deformable outer casing having at least one thickness dimension; and a non-composite core member having a height dimension along an axis defined through the pair of vertebral bodies, wherein all surfaces of the core member are encased within and in direct contact with the outer casing and further wherein a modulus of elasticity of the core member is greater than a modulus of elasticity of the outer casing. - View Dependent Claims (28, 29, 30, 31, 32, 33)
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Specification