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Computers in general dental practice
Published in Raj Rattan, Kevin Lewis, Raj Rattan, Making Sense of Dental Practice Management, 2017
Computer-aided-design/computer-aided manufacture (CADCAM) systems promise much for the future of clinical dentistry. At present, the only commercially-available system –the CEREC (an acronym from the words CEramic REConstruction) –is marketed by Siemens.
Finite element analysis and nanomechanical properties of composite and ceramic dental onlays
Published in Computer Methods in Biomechanics and Biomedical Engineering, 2022
Cem Peskersoy, Heval Makbule Sahan
Uniform and standard class II (MOD) cavities with standard dimensions (10.0 × 3.0 mm occlusal width and 4.0–8.0 mm depth at the occlusal and gingival steps) were prepared with diamond burs using high-speed hand instruments (Figure 1(a,b)). Then, 40 samples were randomly assigned into four groups (n = 10) and scanned with an intraoral scanner (Omnicam, CEREC 3, Sirona-Dentsply, York, PA, USA) to obtain digital impressions of the samples (Figure 1(c)). Ten inlay restorations for each group (a total of 40) were prepared using the CAD/CAM milling station of the CEREC 3 system (Dentsply Sirona, NC, USA) (Figure 1(d,e)) and indirect composite build-up technique. The inner tooth surfaces were etched with 35% phosphoric acid (Scotch Bond Etchant; 3 M ESPE, St Paul, MN) for 30 s, rinsed and dried. Following etching procedures, a universal luting system (RelyX U200, 3 M ESPE) was applied to the cavities according to the manufacturers’ instructions (Figure 1(f)). Inlays were placed into cavities and then light cured for 20 s with an LED lamp (Elipar, 3 M ESPE).
Retrospective physical dosimetry in the Czech Republic: an overview of already established methods and recent research
Published in International Journal of Radiation Biology, 2022
Daniela Ekendahl, Zina Čemusová, Dan Reimitz, Jakub Vávra
The pure dental ceramics used were one fluorapatite glass-ceramic and two leucite glass-ceramics, hereinafter referred as DC1, DC2 and DC3. Their specification including their composition is given in Table 2. Aliquots of these ceramics were manufactured by dental clinics using the Chairside Economical Restoration of Esthetic Ceramics (CEREC) technology in the same way as for patient dental restorations. The aliquots were molded as pellets with dimensions approximately 5 mm × 5 mm × 1 mm. For each of the three dental ceramics, 20 identical aliquots were available. They were measured in the intact form. The luminescence was detected from the veneering ceramic layer.
Marginal and internal fit of crowns based on additive or subtractive manufacturing
Published in Biomaterial Investigations in Dentistry, 2021
Yasser Haddadi, Bahram Ranjkesh, Flemming Isidor, Golnosh Bahrami
The crowns in the SM group were designed in CEREC software version 4.5.2 and milled using an MCX milling station (DentsplySirona) in a hybrid resin block (Vita Enamic, Vita Zahnfabrik). The milling station was calibrated prior to use, and before milling new burs, a 12S step bur and a 12S cylinder pointed bur were installed. To improve accuracy, the fine mode of milling was used. The cement gap at the margin was set at 0.020 mm; 1.2 mm from the margin line, the cement gap gradually increased to 0.1 mm. No further post-processing steps were undertaken after milling.