Transpedicular, extrapedicular and transcorporeal partial disc replacement
OwnerSaid G. Osmaninventor
Life of this patent
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Abstract
A nucleus replacement mimics a native annulus in shape and function for use in partial disc arthroplasty. The nucleus replacement includes a jacket having a compartment, a first anchoring limb on one side of the compartment, and a second anchoring limb on an opposite side of the compartment. The jacket is insertable into a disc space through an operating channel in at least one of the vertebral pedicle and the vertebral body. A shock absorbing material is injectable into the compartment after installing the jacket into the disc space. The shock absorbing material has characteristics that absorb loads on the replacement.
Claims23
A nucleus replacement that mimics a native annulus in shape and function for use in partial disc arthroplasty, the nucleus replacement comprising:
- at least one jacket including a compartment, a first anchoring limb on one side of the compartment, and a second anchoring limb on an opposite side of the compartment, the at least one jacket being insertable into a disc space with the first and second anchoring limbs on opposite lateral sides of the disc space;
- a shock absorbing material injectable into the compartment after installing the at least one jacket into the disc space, the shock absorbing material including characteristics that absorb loads on the replacement;
- and
- a pair of intraosseous anchoring members cooperable with the first and second anchoring limbs, respectively, the intraosseous anchoring members securing the nucleus replacement in the disc space,
- wherein one of the first anchoring limb and the second anchoring limb is sealed, and the other of the first and second anchoring limbs comprises a valve that provides external access to the compartment.
A method of inserting a nucleus replacement that mimics a native annulus in shape and function for use in partial disc arthroplasty, the method comprising:
- (a) forming an operating channel through at least one of a vertebral pedicle and a vertebral body into a disc space;
- (b) cleaning the disc space with a disc reamer;
- (c) providing at least one jacket including a compartment, a first anchoring limb on one side of the compartment, and a second anchoring limb on an opposite side of the compartment, wherein one of the first anchoring limb and the second anchoring limb is sealed, and the other of the first and second anchoring limbs comprises a valve that provides external access to the compartment;
- (d) inserting the at least one jacket along the operating channel and into the disc space;
- and
- (e) injecting a shock absorbing material into the compartment after inserting the at least one jacket into the disc space, wherein the shock absorbing material includes characteristics that absorb loads on the replacement.
A nucleus replacement that mimics a native annulus in shape and function for use in partial disc arthroplasty, the nucleus replacement comprising:
- a jacket including a plurality of interconnected compartments, a first anchoring limb on one side of the compartment, and a second anchoring limb on a lateral opposite side of the compartment, the jacket being insertable through an operating channel formed in at least one of a vertebral pedicle and a vertebral body into a disc space;
- a shock absorbing material injectable into the compartment through one of the first and second anchoring limbs after installing the jacket into the disc space, the shock absorbing material including characteristics that absorb loads on the replacement;
- and
- a pair of anchor members affixable in the operating channel that secure the first and second anchoring limbs and thereby secure the jacket in the disc space,
- wherein one of the first anchoring limb and the second anchoring limb is sealed, and the other of the first and second anchoring limbs comprises a valve that provides external access to the compartment.
A method of inserting a nucleus replacement that mimics a native annulus in shape and function for use in partial disc arthroplasty, the method comprising:
- (a) forming an operating channel through a vertebral pedicle into a disc space;
- (b) securing cannulas in the operating channel;
- (c) cleaning the disc space with a disc reamer through the cannulas;
- (d) providing a jacket including a plurality of interconnected compartments, a first anchoring limb on one side of the compartment, and a second anchoring limb on an opposite side of the compartment, wherein one of the first anchoring limb and the second anchoring limb is sealed, and the other of the first and second anchoring limbs comprises a valve that provides external access to the compartment;
- (e) inserting the jacket along the operating channel and into the disc space;
- (f) injecting a shock absorbing material into the compartment after inserting the jacket into the disc space, wherein the shock absorbing material includes characteristics that absorb loads on the replacement;
- and
- (g) anchoring the jacket in the disc space using the first and second anchoring limbs.
Dependencies are inferred from the claim text.