Patent ID: 8337500

Claim:
An instrument system, comprising: a trial head sized to be received in an intervertebral space; a milling guide configured to be supported relative to the trial head, said milling guide including: a milling guide body that has a proximal end and a distal end that is spaced from the proximal end along a first direction, wherein the milling guide defines a first chamber and a second chamber, the first chamber is elongate along the first direction, and the first and second chambers are arranged side by side with respect to each other; and a pivot element pivotally coupled to the milling guide body, the pivot element configured to pivot relative to the second chamber about a pivot axis that extends in a second direction that is substantially transverse to the first direction; and a tool configured to be at least partially received in the pivot element so as to extend through the first chamber, such that when the pivot element pivots about the pivot axis while the tool is at least partially received in the pivot element and extends through the first chamber, the tool creates a channel in a vertebra when 1) the trial head is received in the intervertebral space, and 2) the milling guide is supported relative to the trial head; wherein each of the first and second chambers is configured to receive the tool.