CAD/CAM international magazine of digital dentistry

cementation materials can be used. The new self- adhesive composite cement SpeedCEM (Ivoclar Vivadent) is particularly suitable for this purpose. In this case report, the chairside creation of a crown is described on the basis of a clinical case using IPS e.max CAD LT and the new SpeedCEM luting cement. _Clinical case report Tooth #25 of a 32-year-old female patient was restored with a crown owing to extensive destruc- tionofthedentalhardtissue(Fig.1).First,thetooth was prepared with a shoulder of approximately 1 mm in width (epigingivally). Subsequently, the preparation was dusted with IPS Contrast Spray (Ivoclar Vivadent) and a digital impression was taken with the CEREC Bluecam camera (Sirona). The Version 3.8 of the CEREC software generates a visual image of the antagonists, which replaces the centric bite record. In order to match the maxillary and mandibular teeth, an image of the centric situ- ation was captured from the buccal aspect (Fig. 2). The maxillary and mandibular teeth were matched semi-automatically (Fig. 3). The3.8versioniscapableofdesigningbiogeneric occlusal surfaces for full crowns. The software pro- vides a design proposal for the tooth morphology, which is based on the occlusal surface of the distal neighbouring tooth and the antagonist (Fig. 4). The image of the bucco-oral cross-section of the crown allows the user to check the minimum occlusal Fig. 4_The biogeneric crown software designs an occlusal surface according to the individual situation. Fig. 5_Bucco-oral cross-section of the restoration: the minimum occlusal thickness of 1.5 mm was checked. Fig. 6_Occlusal view of the crown in the blue state during try-in, before crystallisation firing. Fig. 7_Buccal view of the crown in the blue state during try-in, before crystallisation firing. Fig. 8_Occlusal view of the crystallised and glazed crown on tooth #25. Fig. 9_Buccal view of the crystallised and glazed crown on tooth #25. I 31 industry report _ CAD crown design I CAD/CAM 4_2012 Fig. 7Fig. 6 Fig. 5Fig. 4 Fig. 9Fig. 8