[Precision control of the position of the bone segments during surgical navigation]

The Surgical Segment Navigator (SSN) which has been developed together with Carl Zeiss at the department for craniomaxillofacial surgery at the University of Regensburg, is the first system for highly precise positioning of bone segments. Before clinical application, the precision of the SSN was evaluated by navigation of cadaver bone segments which is presented in this paper. The SSN tracks intraoperatively bone segments and displays the osteotomied segments on a monitor of the SSN-workstation. All movements are documented and saved within a computer file. Thus, the SSN makes the quality assurance of intraoperative positioning of bone segments possible.