US Patent 7744622 Surgical instrument

A surgical instrument system for use in surgical procedures is disclosed. The surgical instrument system includes a guide assembly, a surgical tip assembly, and a drive unit. The guide assembly includes an elongated portion having a central axis of rotation, and a distal end that is positioned a radial distance away from the central axis. The surgical tip assembly may be attached to the guide assembly. The drive unit is coupled to the guide assembly for rotating the guide assembly and thereby rotating the surgical tip with respect to the central axis.