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ePaper created 2014-10-07, 09:31:41 | version 1.30.01
I special _ 3-D planning for implants tomies to allow the implants to be placed in the same vertical position in the newly reduced ridge were illustrated (Fig. 14b). Implant-to-im- plant relationships can be evaluated in all dimen- sions (Figs. 15a & b). In addition, it is important to provide ample clearance between the most posterior implants and the inferior alveolar nerve and mental foramen. Once the positions of the implants have been finalised, a surgical guide can be simulated (Figs. 16a & b). Note that the im- plantswereallparallel,whichcanaidinlaboratory fabrication for overdentures and in achieving passive fit for fixed frameworks (Fig. 16c). The relationship between the original tooth position and the simulated implants can be appreciated in Figure 16d. If a fixed detachable hybrid, full-arch CAD/CAM zirconia restoration, or an immediate restorative protocol is desired, the ability to simu- late implant position with an accurate consider- ation of the desired tooth position will enhance the surgical, restorative and laboratory phases of treatment. _Conclusion Theadventofcompletedenturefabricationhas evolvedintotheadoptionofoverdentureconcepts for both natural and implant-retained restora- tions. Conventional prosthodontic protocols have been developed to aid in the diagnosis, treatment planningandlaboratoryphasesofthereconstruc- tion. These include conventional periapical radi- ographs, panoramic radiographs, oral examina- tion, and mounted, articulated study casts. Using these, the clinician can assess several important aspects of the patient’s anatomical presentation, including vertical dimension of occlusion, lip sup- port, phonetics, smile line, overjet, overbite, and ridgecontours,andcanobtainabasicunderstand- ing of the underlying bone structures. The accu- mulation of preliminary data afforded by conven- tional diagnostics provides the foundation for preparing a course of treatment for the patient. However, the review of findings is based upon a 2-D assessment of the patient’s bone anatomy. 38 I cone beam3_2014 Fig. 15bFig. 15a Fig. 14bFig. 14a Fig. 13cFig. 13bFig. 13a CBE0314_34-39_Ganz 30.09.14 14:17 Seite 5