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ePaper created 2015-05-29, 13:18:43 | version 1.38.0
technique _ virtual planning I porates vital restorative information that will be worn by the patient during the acquisition of the scan. In this manner, the desired tooth position can beevaluated in relation to theunderlying boneand other important anatomic structures such as the maxillarysinusortheinferioralveolarnerve.Certain proprietarymethodsincorporatetheuseoffiducial markers to help with the registration process for planning based directly upon the restorative needs for the patient. The use of interactive treatment planning has expandeddramaticallyinthepasttenyearsascom- puting power has increased exponentially. As de- fined by the author, guided surgery can be divided into three distinct categories once a “virtual” plan has been established based on 3-D scan diagnosis (Ganz-Rinaldi Classification of Guided Implant SurgeryProtocols).Thefirstallowstheinformation to be assessed, providing important information to the clinician who will perform the surgical inter- vention free-hand based upon the software plan, termed “Diagnostic-Freehand”. The second cate- gory involves the fabrication of a surgical guide or template that is remotely constructed from the digital plan usually through rapid prototyping or Figs. 4a–c_Cross-sectional slice reveals tooth position in relationship to the bone (a) and the extension of the labial vestibule (red arrow) (b). The relationship to the maxillary sinus isessentialforplanningintheposterior region, where thin cortical plate can be clearly visualized (arrow) (c). Figs. 5a & b_Evaluating a potential receptor site within the cross-sec- tional view (Slice 63) (a). The posi- tioning of the implant(s) need to fall within the envelope of the teeth (b). I 07cone beam2_2015 Fig. 4a Fig. 4b Fig. 4c Fig. 5a Fig. 5b Fig. 6a Fig. 6b Fig. 6c Fig. 7a Fig. 7b Fig. 8a Fig. 8b Fig. 9a Fig. 9b