1 Université Clermont Auvergne, CROC, F-63000 Clermont-Ferrand, France and CHU Clermont-Ferrand, Service d'Odontologie, F-63003 Clermont-Ferrand, France.
2 Division of Prosthodontics and Restorative Dentistry, Faculty of Dentistry, McGill University, Montreal, QC, Canada.