fascia and muscle as shown in fig7 in steps i and ii a first set of fiducial markers 110 a is placed onto a patient 39 s jawbone 102 a for scanning and treatment planning before the treatment a first set of markers 110 a is placed onto patients existing anatomy at location a as long as the position is fixed with references to the surgical site in the flap surgery a first set of fiducial markers is placed onto the gum when the patient is scanned and the treatment is planned according to the markers fig7 shows a fully edentulous case in which markers 110 a are placed on the arch for data acquisition and planning before the surgery in step ii the patient is scanned wearing the markers 110 a then the markers are taken out the scan data is processed in the treatment planning module so that all the operations are defined with respect to the markers 110 a when it is the time for treatment the first set of fiducial markers 110 a is placed back where it was when the navigation base data was originally obtained for the purpose of tracking the positions of jawbone 102 a during the surgery the tracking system 150 is following the markers and communicates with the planning module 130 so that the system knows where to operate the surgery can.