Surgical segment navigator

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The Surgical Segment Navigator is a computer-aided system for medical navigation in computer-assisted surgery . It is based on the same platform as the Surgical Tool Navigator (STN), the Surgical Microscope Navigator (SMN) and the Multi-Coordinate Manipulator (MKM) from Carl Zeiss .

Navigation of a bone segment ( orbital frame and zygomatic bone ) on the SSN (color coding of starting, target and current position)

SSN

The SSN is a computer-aided system for bone segment navigation in oral and maxillofacial surgery . With this navigation system, osseous misalignments are precisely corrected using a preoperative simulation and operation planning. The system has been developed at the University of Regensburg since 1997 with the support of Carl Zeiss Oberkochen. It is based on an infrared localization system in which an infrared camera measures at least three infrared transmitters that are connected to a piece of bone in space. The SSN is used in dysgnathic surgery and for the reconstruction of misalignments of the walls of the eye socket or the midface.

SSN ++

Since 2001 the SSN ++ has been developed at the University of Heidelberg , a navigation system that enables markerless patient registration on a native (= markerless) CT or MRT image data set. In this system, a computer detects the patient's position on the operating table using a surface scanner. The SSN ++ compares the surface image of the patient on the operating table with the surface image of the soft tissue jacket in the preoperative CT or MRT image data set. This principle corresponds to the terrain-contour comparison of missiles. The advantage of the method is that the patient position can be recognized in a simplified and fully automatic manner; A second CT with registration markers (as is often necessary in computer-aided surgery) can be dispensed with, so that the radiation exposure for the patient can be reduced.

Web links

  • Marmulla R, et al .: A computer-aided navigation system as a new surgical procedure for orbital reconstruction. Ophthalmology 1999 (213) 301-5 (abstract)
  • Marmulla R, et al .: Markerless registration of the patient position. ENT 2005 (53) 148-54 (abstract)