1 Associate Professor and Program Director, Graduate Prosthodontics, Aristotle University of Thessaloniki, School of Dentistry, Thessaloniki, Greece; and Adjunct Associate Professor, Division of Graduate and Postgraduate Prosthodontics, Tufts University School of Dental Medicine, Boston, Mass. Electronic address: konstantinos.michalakis@tufts.edu.
2 Clinical Professor and Program Director, Graduate Prosthodontics, Department of Restorative Sciences and Biomaterials, Boston University Henry M. Goldman School of Dentistry, Boston, Mass.