SURGICAL GUIDES EFFECTIVENESS

The primary objective of the study is to study the accuracy of the use of guided surgical splints compared to traditional freehand zygomatic implant placement. The secondary objectives are: * To compare the magnitude of variations depending on implant length by superimposing postoperative CT scans using 3DSlicer® (http://www.slicer.org) and exocad® software. * To compare the magnitude of the variations depending on the location of the implant by superimposing postoperative and postoperative CT scans using 3DSlicer® (http://www.slicer.org) and exocad® software. * To assess the clinical relevance of cogomatic implant placement using guided surgical splinting on pain parameters and surgical time.