Enhanced Interfacial Conformance for a Composite Rod for Spinal Implant Systems with Higher Modulus Core and Lower Modulus Polymeric Sleeve
First Claim
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1. A spinal rod composite comprising:
- a core component having a diameter and an axial length; and
a tube having a diameter equal to or less than the diameter of the core component, wherein a vibrational energy is applied between the core and the tube such that the core is received within the tube and the tube is advanced along the axial length of the tube, the spinal rod composite then having facial conformance forces maintaining the tube position along the axial length of the core.
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Abstract
A spinal rod includes a core component and a tube. The core component has a diameter and an axial length. The tube has a diameter equal to or less than the diameter of the core component. A vibrational energy is applied between the core and the tube such that the core is received within the tube and the tube is advanced along the axial length of the tube. The spinal rod composite then has facial conformance forces maintaining the tube position along the axial length of the core.
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Citations
20 Claims
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1. A spinal rod composite comprising:
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a core component having a diameter and an axial length; and a tube having a diameter equal to or less than the diameter of the core component, wherein a vibrational energy is applied between the core and the tube such that the core is received within the tube and the tube is advanced along the axial length of the tube, the spinal rod composite then having facial conformance forces maintaining the tube position along the axial length of the core. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 17)
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13. A method of forming a composite spinal rod, comprising the steps of:
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advancing a core into a tube, wherein the tube has an inner diameter less than the diameter of the core; and vibrating the core relative to the tube as the advancing step occurs.
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- 14. The method of claim 14, further comprising the step of advancing the core and tube composite into a second tube.
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18. A spinal rod comprising:
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a core component having a first diameter extending along a first length of the core component and a second diameter extending from the first length along a second length of the core component, the first diameter being greater than the second diameter; a first tube having an inner diameter equal to or less than the first diameter of the core component and greater than the second diameter of the core component, the first tube further having a generally constant outer diameter; and a second tube having an inner diameter equal to or less than the second diameter of the core component and an outer diameter generally equal to the inner diameter of the first tube, wherein the second tube extends along the second length of the core component and the first tube extends along the first and second lengths of the tube such that the spinal rod has a generally uniform thickness, the spinal rod having a first modulus of elasticity in the first length and a second modulus of elasticity in the second length, the first modulus of elasticity being higher than the second modulus of elasticity. - View Dependent Claims (19, 20)
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Specification