Vertebral osteosynthesis device
First Claim
1. A vertebral osteosynthesis device for affixation to vertebrae, comprising:
- two rigid support rods adapted to be disposed substantially parallel, one on each side of spineous processes of the vertebrae;
a plurality of bone anchoring elements, each bone anchoring element having one of a hook element adapted to fit around a vertebral process and a screw element adapted to be screwed into a vertebral pedicle and each bone anchoring element having two lateral walls extending in a direction opposite said hook and screw elements, said lateral walls being substantially parallel and flexible and having inside and outside faces, and upper and lower ends, said outside faces being inclined toward each other at the upper ends, said lateral walls delimiting between them a channel matching a transverse dimension of said support rods, the distance separating said lateral walls at the upper ends thereof being slightly less than the transverse dimension of said support rods whereby said bone anchoring elements may be provisionally attached to said support rods by clipping said bone anchoring elements to said support rods;
a plurality of gripping elements, each gripping element being associated with a bone anchoring element and having two opposed side arms, the side arms having inside faces and outside faces, the inside faces being inclined at a slope matching the outside faces of said lateral walls and adapted to engage the outside faces of said lateral walls and to bring said lateral walls closer together during engagement of said lateral walls; and
a plurality of gripping means for attaching said gripping elements to said bone anchoring elements, each of said gripping means passing through a side arm of a gripping element and threadably engaging a bone anchoring element and displacing said gripping element whereby the inside faces of said gripping elements engage and slide on said outside faces of said lateral walls of said bone anchoring elements to bring said lateral walls closer together.
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Accused Products
Abstract
A vertebral osteosynthesis device employs outside faces of lateral walls of each hooking element which are inclined toward each other such that they converge from the side opposite hooking elements designed to be attached to the bone, while a gripping element in the shape of a clamp has side arms with inside faces inclined at slopes that match those of outside faces of lateral walls. At least two gripping means are disposed beyond the lateral walls and are provided to move the gripping element such that the inside faces of its lateral arms abut the lateral walls, bringing them toward each other and sliding on them upon gripping, to bring the lateral walls closer together to lock each hooking element onto a support rod.
251 Citations
14 Claims
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1. A vertebral osteosynthesis device for affixation to vertebrae, comprising:
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two rigid support rods adapted to be disposed substantially parallel, one on each side of spineous processes of the vertebrae; a plurality of bone anchoring elements, each bone anchoring element having one of a hook element adapted to fit around a vertebral process and a screw element adapted to be screwed into a vertebral pedicle and each bone anchoring element having two lateral walls extending in a direction opposite said hook and screw elements, said lateral walls being substantially parallel and flexible and having inside and outside faces, and upper and lower ends, said outside faces being inclined toward each other at the upper ends, said lateral walls delimiting between them a channel matching a transverse dimension of said support rods, the distance separating said lateral walls at the upper ends thereof being slightly less than the transverse dimension of said support rods whereby said bone anchoring elements may be provisionally attached to said support rods by clipping said bone anchoring elements to said support rods; a plurality of gripping elements, each gripping element being associated with a bone anchoring element and having two opposed side arms, the side arms having inside faces and outside faces, the inside faces being inclined at a slope matching the outside faces of said lateral walls and adapted to engage the outside faces of said lateral walls and to bring said lateral walls closer together during engagement of said lateral walls; and a plurality of gripping means for attaching said gripping elements to said bone anchoring elements, each of said gripping means passing through a side arm of a gripping element and threadably engaging a bone anchoring element and displacing said gripping element whereby the inside faces of said gripping elements engage and slide on said outside faces of said lateral walls of said bone anchoring elements to bring said lateral walls closer together. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An osteosynthesis device comprising:
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at least one support rod for supporting vertebrae of a spine; at least one bone-anchoring element for anchoring the support rod to the spine, the bone anchoring element including a base; a hooking element for affixing the bone-anchoring element on vertebrae of the spine extending from the base, a pair of opposed lateral walls projecting from the base in a direction away from the hooking element, the lateral walls having opposed inside faces, the inside faces defining a channel formed between the lateral walls for receiving the support rod, each lateral wall having an outside surface, the outside surface of one lateral wall converging toward the outside surface of the opposite lateral wall;
said base having portions extending transversely beyond each lateral wall;a gripping element having a pair of opposed side arms, each side arm including an engaging surface for engaging the outside surface of one of the lateral walls, each engaging surface being inclined in a direction to urge the lateral walls toward each other in response to movement of the gripping element toward the base; and a pair of fasteners for mounting the gripping element on the base and moving the gripping element toward the base, each fastener being located to engage an associated one of the portions of the base extending transversely beyond each lateral wall. - View Dependent Claims (12, 13, 14)
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Specification