1. Department of Prosthetic Dentistry, Service of Odontology, Hôtel‐Dieu Hospital, AP‐HP
2. Paris 7 – Denis Diderot University, U.F.R. of Odontology, Paris
3. Univ Clermont 1, UFR Odontologie EA3847
4. CHU Clermont‐Ferrand, Service d’Odontologie, Clermont‐Ferrand, France
5. Faculty of Dentistry, McGill University, Montreal, QC, Canada
6. Faculdade de Odontologia de Ribeirão Preto, Universidade de São Paulo, São Paulo, Brazil