Twenty years ago, Cerec was introduced to the dentalpractice as a completely new workflow. The restorationof a tooth with a ceramic inlay in one appointment wasan innovation that was followed with scepticism in thebeginning. Only after the first long-term studies werepublished, for example Reiss/Walther, did the break-through and recognition come from science and univer-sities. Since the market introduction of Cerec 1 in 1988,over 25,000 systems have been sold worldwide. We canassume that since its inception, more than 14 million Cerecrestorations have been placed. The initial scepticism towards the Cerec method has beenresolved. Many scientific publications have dealt with allaspects of ceramic restorations and have proven thatCerec results are at least as good as ceramic or goldrestorations from the dental lab. Eight years ago, in the wake of the Berlin Dentists Con-ference, the current Cerec 3 hardware was introduced tothe audience. Compared to the former editions Cerec 1and Cerec 2, Sirona had decided to separate the acquisi-tion unit from the milling unit.