1. Otto T, De Nisco S . Computer-aided direct ceramic restorations: a 10- year prospective clinical study of Cerec CAD/CAM inlays and onlays. Int J Prosthodont 2002; 15: 122–128.
2. Reiss B . Clinical results of Cerec inlays in a dental practice over a period of 18 years. Int J Comput Dent 2006; 9: 11–22.
3. Sjögren G, Molin M, van Dijken J W . A 10-year prospective evaluation of CAD/CAM-manufactured (Cerec) ceramic inlays cemented with a chemically cured or dual-cured resin composite. Int J Prosthodont 2004; 17: 241–246.
4. Luthy H, Filser F, Loeffel O, Schumacher M et al. Strength and reliability of four unit all-ceramic posterior bridges. Dent Mater 2005; 21: 930–937.
5. May K B, Russell M M, Razzoog M E, Lang B R . Precision of fit: the Procera AllCeram crown. J Prosthet Dent 1998; 80: 394–404.