Expansible intravertebral implant system with posterior pedicle fixation
First Claim
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1. An expandable intravertebral implant system comprising:
- an intravertebral implant comprising an expandable anterior part, and a posterior part coupled to the expandable anterior part, wherein the expandable anterior part and the posterior part are configured to be positioned within a vertebral body; and
a pedicle fixation configured to be anchored to a vertebral pedicle of the vertebral body to position the expandable anterior part and the posterior part within the vertebral body, the pedicle fixation comprising a posterior inner portion and an anterior inner portion defining a hollow portion for receiving the posterior part of the intravertebral implant such that the expandable anterior part is configured to move along at least two degrees of freedom relative to the pedicle fixation with the pedicle fixation anchored to the vertebral pedicle, and wherein movement of the posterior part in a first degree of freedom of the two degrees of freedom is independent from movement of the posterior part in a second degree of freedom of the two degrees of freedom.
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Abstract
The present invention relates to an expansible intravertebral implant system comprising an intravertebral implant (1) with an expandable anterior part (11), which is expansible in a vertebral body, and a posterior part; and a pedicle fixation (2) having at least one hollow portion for receiving the posterior part. The present invention also relates to said expansible intravertebral implant system additionally comprising a posterior element (3), arranged partially outside the vertebra and rigidly connected to the pedicle fixation (2), for serving as an anchoring point for at least one intravertebral rod or at least one system of artificial ligaments.
222 Citations
20 Claims
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1. An expandable intravertebral implant system comprising:
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an intravertebral implant comprising an expandable anterior part, and a posterior part coupled to the expandable anterior part, wherein the expandable anterior part and the posterior part are configured to be positioned within a vertebral body; and a pedicle fixation configured to be anchored to a vertebral pedicle of the vertebral body to position the expandable anterior part and the posterior part within the vertebral body, the pedicle fixation comprising a posterior inner portion and an anterior inner portion defining a hollow portion for receiving the posterior part of the intravertebral implant such that the expandable anterior part is configured to move along at least two degrees of freedom relative to the pedicle fixation with the pedicle fixation anchored to the vertebral pedicle, and wherein movement of the posterior part in a first degree of freedom of the two degrees of freedom is independent from movement of the posterior part in a second degree of freedom of the two degrees of freedom. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An expandable intravertebral implant system comprising:
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an intravertebral implant comprising an expandable anterior part configured to be positioned within a vertebral body, and a posterior part; a pedicle fixation configured to be anchored to a vertebral pedicle of the vertebral body, the pedicle fixation comprising a posterior inner portion and an anterior inner portion coupled to the posterior part, wherein the pedicle fixation comprises a main axis and wherein the posterior part of the intravertebral implant is configured to move in translation and in rotation along the main axis of the pedicle fixation relative to the anterior inner portion of the pedicle fixation in such a way that the direction of expansion of the expandable anterior part of the intravertebral implant is independent from a position of the pedicle fixation in the vertebral pedicle. - View Dependent Claims (13, 14, 15, 16, 17)
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18. An expandable intravertebral implant system comprising:
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an intravertebral implant comprising an expandable anterior part, and a posterior part coupled to the expandable anterior part, wherein the expandable anterior part and the posterior part are configured to be positioned within a vertebral body; and a pedicle fixation configured to be anchored to a vertebral pedicle of the vertebral body, the pedicle fixation comprising a posterior inner portion and an anterior inner portion defining a hollow portion for receiving the posterior part, wherein the posterior part of the intravertebral implant is configured to translate within the hollow portion of the pedicle fixation along a main axis of the pedicle fixation without requiring rotation of the intravertebral implant in such a way that a position of the intravertebral implant within the vertebral body is independent from a position of the pedicle fixation in the vertebral pedicle. - View Dependent Claims (19, 20)
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Specification