CAD/CAM - international magazine of digital dentistry

06 I I case report _ implant placement _This clinical case required optimal implant placement based upon a restoratively driven treat- mentplanandguidedsurgery.Toachievethisgoal,we made use of CT scans, SimPlant (Materialise Dental) planning software, the new Zimmer Guided Surgery InstrumentationandthenewImmediateSmilemodel (Materialise Dental). The patient was a 49-year-old female in good health, completely edentulous in the maxilla and wore a complete upper denture. On the lower, she wore an implant-retained over-denture. The planning phase for the case began with a CT scan utilising the i-Cat and the Dual Scan protocol (Materialise Dental). The patient’s existing denture was transformed into a scan prosthesis by gluing eight Dual Scan Markers onto the surface. A radio- lucent bite index was made to secure the prosthesis in the correct position. The patient was first scanned in the i-Cat 17-19 whilewearingthescanprosthesisandthebiteindex. In a second scan, the scan prosthesis was scanned alone. The resulting CT data was loaded into Sim- Plant, and the scan prosthesis was superimposed uponthestudyusingtheSimPlantDualScanwizard (Figs. 1a & b). CAD/CAM 3_2011 Fig. 1_Pre-op SimPlant planning showing the scan prosthesis. Fig. 2_Pre-op SimPlant planning showing Virtual Teeth. Fig. 3_Immediate Smile model with analogues inserted. Fig. 4_Immediate Smile denture used to mount case. Fig. 5_SurgiGuide orientation and registration on articulator. Immediate restoration in the fully edentulous maxilla region Author_ Dr Max J. Cohen, USA Fig. 1 Fig. 2 Fig. 5Fig. 3 Fig. 4