Arthroplasy revision system and method
View Patent ↗The present method includes the following steps: removing a portion of a previously implanted spinal arthroplasty device; and attaching a revision component to a remaining portion of the previously implanted spinal arthroplasty device to alter a biomechanical characteristic of the implanted arthroplasty device. Another aspect of the invention provides a method of limiting motion between adjacent vertebrae including the steps of accessing an implanted spinal arthroplasty device comprising a cephalad component fixed to a first vertebra and a caudal component fixed to a second vertebra inferior to the first vertebra, the cephalad and caudal components having a range of motion between them, and attaching a revision component to the cephalad and caudal components to reduce the range of motion. The invention also includes revision devices for revising the biomechanics of implanted spinal arthroplasty devices.
1. A revision device for an implanted spinal device, the implanted spinal device comprising a cephalad component fixed to a first vertebra and a caudal component fixed to a second vertebra inferior to the first vertebra, wherein the cephalad component interfaces with and engages with the caudal component, the cephalad and caudal components having a biomechanical relationship between them, the revision device comprising: a first surface adapted to interact with the cephalad component and a second surface adapted to interact with the caudal component to alter the biomechanical relationship between the cephalad and caudal components.
2. The revision device of claim 1 , wherein the biomechanical relationship is a range of motion, the first surface being adapted to interact with the cephalad component and a second surface adapted to interact with the caudal component to alter the range of motion between the cephalad and caudal components.
3. The revision device of claim 1 , wherein the cephalad component comprises a cephalad bearing element and the caudal component comprises a caudal bearing element, the revision device being adapted to attach to the cephalad component on one side of the cephalad bearing element and to attach to the caudal component on a side of the caudal bearing element opposite to said one side.
4. The revision device of claim 3 , wherein the cephalad component further comprises a cephalad arm, the revision device further comprising an attachment mechanism adapted to attach to the cephalad arm.
5. The revision device of claim 1 , wherein the first surface is adapted to interact with the cephalad component and a second surface is adapted to interact with the caudal component to substantially eliminate motion between the cephalad and caudal components.
6. The revision device of claim 1 , wherein the cephalad component abuts the caudal component.