PubMed ID (PMID): 16955653Pagine 153-156, Lingua: IngleseHaller, Bernd / Ernst, C. P. / Hugo, B. / Kunzelmann, K. H. / Merte, K. / Ott, K. / Reiss, B. / Wiedhahn, KlausGerman Society for Restorative Dentistry (DGZ), German Society for Computerized Dentistry (DGCZ)