CPC A61F 2/4611 (2013.01) [A61B 34/20 (2016.02); A61F 2/4465 (2013.01); A61F 2/4684 (2013.01); A61B 2017/564 (2013.01); A61B 2034/2051 (2016.02); A61B 2034/2063 (2016.02); A61B 2034/2072 (2016.02); A61B 2090/3764 (2016.02); A61B 2090/3945 (2016.02); A61F 2002/3008 (2013.01); A61F 2002/4663 (2013.01); A61F 2310/00023 (2013.01); A61F 2310/00179 (2013.01); A61F 2310/00359 (2013.01)] | 20 Claims |
1. A method for treating a spine, the method comprising:
positioning a distal end of a cannulated shaft of a surgical instrument into an intervertebral cavity, the surgical instrument including a tracking device oriented relative to a sensor to communicate a signal representative of a position of the distal end of the cannulated shaft of the surgical instrument relative to the intervertebral cavity;
operating a display to display an image of the intervertebral cavity:
operating a navigation system to track at a first time the distal end of the cannulated shaft at a first position within the intervertebral cavity:
operating the navigation system to track at a second time the distal end of the cannulated shaft at a second position within the intervertebral cavity;
operating a processor to:
project overlapping images of spheres on the displayed image of the intervertebral cavity based on at least the first position and the second position;
determine a volume of the intervertebral cavity based on the data projected overlapping images of spheres; and
delivering bone graft through the cannulated shaft and into the intervertebral cavity.
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