1. From the Division of Small Animal Surgery, Orthopedics and Stomatology (Berger, Roux, Schawalder), Department of Clinical Veterinary Medicine, University of Berne, Länggassstrasse 128, 3012 Berne, Switzerland; Private Dental Histological Laboratory (Stich), Schlösslistrasse 49, 3012 Berne, Switzerland; and, the Institute of Prehistory and Archaeological Science (Hüster), University of Basel, Spalenring 145, 4055 Basel