| 摘要 |
A crosslink is provided for securing orthopedic implants, such as facet joint replacement implants, together. The crosslink has a pair of implant coupling components, a pair of rod coupling components, a rod, and a pair of fasteners. Each facet joint implant may include a semicylindrical interface received in a resilient member of the corresponding implant coupling component to permit relative cephalad/caudal adjustment between the crosslink and the implants. The resilient members grip the semicylindrical interface of the implant to enable at least temporary attachment of the implant coupling components to the implants independently of the rod. Clocking features on the semicylindrical interfaces and on the interfacing areas of the implant coupling components and rod coupling components may limit assembly of the crosslink to discrete relative orientations and prevent play after assembly. The fasteners secure the rod coupling components to the rod at the desired positions along the rod. |
| 主权项 |
1. A system comprising:
a first left implant having an opening for receiving a first fastener, the first fastener having a first head portion and first shaft portion, the first shaft portion engageable with a first vertebra, the first left implant comprising a first left articular surface and a left crosslink coupling interface, wherein the first left articular surface is shaped to articulate with a second left articular surface on a second vertebra; a first right implant having an opening for receiving a second fastener, the second fastener having a second head portion and second shaft portion, the second shaft portion engageable with the first vertebra, the first right implant comprising a first right articular surface shaped to articulate with a second right articular surface on the second vertebra; and a crosslink attachable to the first left and right implants to secure the first left implant with respect to the first right implant at any of a limited number of discrete relative displacements, the crosslink comprising a rod and a left implant coupling component, wherein the rod attaches to the left implant coupling component, the left implant coupling component having a left implant coupling interface, wherein the left implant coupling interface attaches directly to the left crosslink coupling interface, wherein a left clocking feature including a plurality of ridges facing the crosslink formed between the left implant coupling interface and the left crosslink coupling interface, wherein the left clocking feature limits attachment between the left implant coupling component and the first left implant to the discrete relative displacements, wherein the left implant coupling component comprises a resilient member, wherein the resilient member comprises the left implant coupling interface, wherein the left implant coupling interface snaps onto the left crosslink coupling interface to secure the first left implant to the first right implant. |
