Vertebral body replacement implant
First Claim
1. A vertebral body replacement implant comprising:
- an upper and a lower support plate for positioning against end faces of vertebral bodies;
two load-bearing elements, the mutual spacing of the two load-bearing elements being adjustable;
an articulated connection between at least one of the two load-bearing elements and a corresponding one of the upper and lower support plates, the load-bearing element in a region of the articulated connection to the corresponding support plate having a bearing projection with a spherical lateral support surface,one of the corresponding support plate or a bearing part connected to the support plate resting with a contact surface, which is of a complimentary design to the spherical lateral support surface, against the spherical lateral support surface of the bearing projection over an angular range that extends in a peripheral direction at least over 180°
, the corresponding support plate or the bearing part being mounted on the bearing projection pivotably about a pivotal axis extending parallel to the support plate; and
a clamping device that clamps the bearing projection, on the one hand, and the corresponding support plate or the bearing part in a contact region of at least one of the spherical lateral support surface and the contact surface, on the other hand, towards one another,wherein;
the support plate is of a U-shaped design having two substantially parallel limbs connected by a transverse web;
the limbs are disposed on either side of the spherical bearing projection,the pivotal axis extends parallel to the transverse web;
the clamping device in a clamping position clamps the two limbs towards one another at their free ends remote from the transverse web; and
in the clamping position the bearing projection and the support plate or the bearing part are clamped non-pivotably relative to one another and in a release position are released so that they are freely pivotable relative to one another about the pivotal axis.
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Accused Products
Abstract
A vertebral body replacement implant having an upper and a lower support plate and two load-bearing elements, the mutual spacing of which is adjustable and of which at least one is connected in an articulated manner to a support plate, the load-bearing element in the region of the articulated connection to the support plate having a bearing projection with a spherical lateral support surface having a complimentary design to the contact surface of the support plate or a bearing part connected thereto, the contact surface extending in peripheral direction at least over 180°, the support plate or the bearing part is mounted on the bearing projection pivotably about a pivotal axis that extends parallel to the support plate, and a releasable clamping device that clamps the bearing projection and the support plate or the bearing part in the contact region of the lateral surface and/or of the contact surface against one another.
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Citations
31 Claims
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1. A vertebral body replacement implant comprising:
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an upper and a lower support plate for positioning against end faces of vertebral bodies; two load-bearing elements, the mutual spacing of the two load-bearing elements being adjustable; an articulated connection between at least one of the two load-bearing elements and a corresponding one of the upper and lower support plates, the load-bearing element in a region of the articulated connection to the corresponding support plate having a bearing projection with a spherical lateral support surface, one of the corresponding support plate or a bearing part connected to the support plate resting with a contact surface, which is of a complimentary design to the spherical lateral support surface, against the spherical lateral support surface of the bearing projection over an angular range that extends in a peripheral direction at least over 180°
, the corresponding support plate or the bearing part being mounted on the bearing projection pivotably about a pivotal axis extending parallel to the support plate; anda clamping device that clamps the bearing projection, on the one hand, and the corresponding support plate or the bearing part in a contact region of at least one of the spherical lateral support surface and the contact surface, on the other hand, towards one another, wherein; the support plate is of a U-shaped design having two substantially parallel limbs connected by a transverse web; the limbs are disposed on either side of the spherical bearing projection, the pivotal axis extends parallel to the transverse web; the clamping device in a clamping position clamps the two limbs towards one another at their free ends remote from the transverse web; and in the clamping position the bearing projection and the support plate or the bearing part are clamped non-pivotably relative to one another and in a release position are released so that they are freely pivotable relative to one another about the pivotal axis. - 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, 24, 25, 26, 27, 28, 29, 30, 31)
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Specification