Please activate JavaScript!
Please install Adobe Flash Player, click here for download

CAD/CAM - international magazine of digital dentistry

ricates multiple digital models at once. If needed, sculpting tools facilitate corrections by reimaging, eliminating the need for constructing multiple models or placing temporaries. During the milling process, the unit’s robust design minimizes vibrations, resulting in micron- precise accuracy for enhanced fit and function of the final restoration.4 As dental practices have moved toward in- officeCAD/CAM,innovativeceramicmaterialshave beendevelopedthataddressmaterialissuesregard- ing strength and aesthetics. These new and im- proved ceramics are designed to endure CAD/CAM processing without chipping or fracturing. They can be milled to full contour for improved fit and function.5 For example, there are many advantages to placing monolithic lithium-disilicate restorations (IPS e.max CAD). These restorations exhibit the same structural and esthetic properties of ceramic, yet demonstrate high-strength resistance to long- termmasticationforces.4 Theyalsoblendseamlessly with natural dentition. Additionally, these restorations are indicated for full-coverage posterior and anterior crowns, although the material itself may be milled for cases requiring thin veneers, minimally invasive inlays and onlays, partial crowns, implant superstructures and three-unit bridges.5, 6 Research shows that restorations fabricated withCAD/CAMperformbetterandaremoredurable compared to other available restorative options.4 Fig. 2_Pre-operative right buccal view of retained primary molars 55 and 65. Fig. 3_Pre-operative mesial view of retained primary molars 55 and 65. Fig. 4_The zirconium abutments (Astra OsseoSpeed, DENTSPLY) were placed and scanned using the E4D intraoral scanner. Fig. 5_The zirconium abutment margins were marked in the buccal area. Fig. 6_Viewing zirconium in subgingival locations was simplified using the E4D ICE system. Fig. 7_Image of the final restoration design proposed by the E4D design software for milling using lithium-disilicate material. I 23 case report _ CAD/CAM restoration I CAD/CAM 4_2013 Fig. 7Fig. 6 Fig. 5Fig. 4 Fig. 3Fig. 2