| CPC A61B 34/20 (2016.02) [A61B 17/7074 (2013.01); A61B 90/06 (2016.02); A61B 2034/2051 (2016.02); A61B 2090/064 (2016.02); A61B 2090/397 (2016.02)] | 20 Claims | 

| 1. A method for correcting a spinal deformity comprising the steps of: providing a trackable instrument for correcting a spinal deformity comprising: a body having a distal portion configured to perform a surgical task and a proximal portion configured to be manipulated by a user, a plurality of markers configured to be tracked by a navigation system including a rigid marker and a movable marker attached to the body; a flexible portion located along the body, wherein the flexible portion is positioned between the rigid marker and the movable marker, and positioning the trackable instrument on a portion of a spine having the spinal deformity; and performing a surgical task, wherein the plurality of markers indicate an amount of force applied to the instrument. |