Adjustable cutting of cutout in vertebral bone
First Claim
1. An instrument system for preparing a first vertebral bone adjacent an intervertebral space, the intervertebral space positioned between the first vertebral bone and a second vertebral bone, the instrument system comprising:
- a trial implant;
a holding device including a holding shaft, the trial implant securable to the holding shaft;
a cutting tool including a cutting shank and a chisel mounted to a front end of the cutting shank, the holding shaft slidably positionable within the cutting shank; and
a stop including a stop shank, a stop member and a stop surface, the holding shaft slidably received in the stop shank, and the stop shank slidably received in the cutting shank, wherein the stop member limits forward motion of the chisel relative to the trial implant.
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Accused Products
Abstract
An instrument, instrument system and method for cutting a cutout in a vertebral bone adjacent an intervertebral space are provided which make use of a cutting blade. The cutting blade is mounted on a support structure for movement toward and cutting into the vertebral bone. A stop arrangement is also mounted on the support structure and is movable relative to the cutting blade to a position to limit movement of the cutting blade into the vertebral bone. Typically, the limited movement cutting is made after two cutouts are provided in adjacent vertebral bones using a trial implant.
85 Citations
21 Claims
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1. An instrument system for preparing a first vertebral bone adjacent an intervertebral space, the intervertebral space positioned between the first vertebral bone and a second vertebral bone, the instrument system comprising:
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a trial implant; a holding device including a holding shaft, the trial implant securable to the holding shaft; a cutting tool including a cutting shank and a chisel mounted to a front end of the cutting shank, the holding shaft slidably positionable within the cutting shank; and a stop including a stop shank, a stop member and a stop surface, the holding shaft slidably received in the stop shank, and the stop shank slidably received in the cutting shank, wherein the stop member limits forward motion of the chisel relative to the trial implant. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An instrument system for creating a cutout in a vertebral bone, wherein the vertebral bone partially defines an intervertebral space, the instrument comprising:
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a cutting tool including a cutting shank that defines a forward end and rearward end, and a chisel disposed at the forward end of the cutting shank, the chisel having a guiding section, the chisel configured to create the cutout in the vertebral bone as the cutting tool moves forward toward the vertebral bone; a trial implant including a guiding groove, the guiding section slidably received in the guiding groove when the trial implant is disposed in the intervertebral space to guide the chisel into the vertebral bone along a desired direction; and a stop supported by the cutting shank, wherein the stop has an adjustable position relative to the chisel, and the stop includes a stop member that is configured limit forward movement of the cutting tool to a depth in the vertebral bone that is dependent upon the position of the stop relative to the chisel. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification