Artificial spinal disc
OwnerRobert Paxson, Carl Nilsson +1inventors
InventorsRobert Paxson, Carl Nilsson, Daniel Savage
Life of this patent
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Abstract
The present invention relates to prostheses for treating spinal pathologies, and more specifically to an artificial disc implant. The implant includes an inferior implant for placement on an inferior vertebra and a superior implant for placement on a superior vertebra. The implant also includes an articulating interface that is generally saddle-shaped and ramped from the anterior of the vertebrae to the posterior of the vertebrae.
Claims37
An artificial disc implant comprising:
- a superior implant configured for placement ona superior vertebra;
- an inferior implant configured for placement on an inferior vertebra;
- and
- an articulating interface between the superior vertebra and the inferior vertebra, the articulating interface being configured such that movement between the superior and inferior implants about an axial rotation axis causes movement between the superior and inferior implants about a lateral bending axis.
An artificial disc implant comprising:
- a superior implant configured for placement on a superior vertebra;
- an inferior implant configured for placement on an inferior vertebra;
- and
- an articulating interface between the superior vertebra and the inferior vertebra, the articulating interface being generally saddle-shaped and ramped, wherein the articulating interface generally progresses toward the superior vertebra and away from the inferior vertebra as the interface progresses from a first side of the artificial disc implant to an opposing side of the artificial disc implant.
An artificial disc implant for placement between a superior vertebra and an inferior vertebra, the artificial disc implant comprising:
- a superior implant configured for placement on a superior vertebra and having an articulating surface that is saddle-shaped and ramped such that the articulating surface of the superior implant generally progresses away from the superior vertebra and toward the inferior vertebra as the articulating surface of the superior implant progresses from the posterior to the anterior of the artificial disc implant;
- an inferior implant configured for placement on an inferior vertebra;
- and
- a spacer between the superior implant and the inferior implant, the spacer having an articulating surface configured to articulate with the articulating surface of the superior implant, the articulating surface of the spacer being saddle-shaped and ramped such that the articulating surface of the spacer generally progresses away from the inferior vertebra and toward the superior vertebra as the articulating surface of the spacer progresses from the anterior to the posterior of the artificial disc implant.
An artificial disc implant for placement between a superior vertebra and an inferior vertebra, the artificial disc implant comprising:
- a superior implant having a fixation surface configured for placement on a superior vertebra and an articulating surface that is saddle-shaped and ramped such that the articulating surface of the superior implant generally progresses away from the superior vertebra and toward the inferior vertebra as the articulating surface of the superior implant progresses from the posterior to the anterior of the artificial disc implant;
- and
- an inferior implant having a fixation surface configured for placement on an inferior vertebra and an articulating surface configured to articulate with the articulating surface of the superior implant, the articulating surface of the inferior implant being saddle-shaped and ramped such that the articulating surface of the inferior implant generally progresses away from the inferior vertebra and toward the superior vertebra as the articulating surface of the inferior implant progresses from the anterior to the posterior of the artificial disc implant.
Dependencies are inferred from the claim text.