[1] St Joseph Univ, Dept Orthodont, Beirut, Lebanon
[2] St Joseph Univ, Dept Prosthodont, Beirut, Lebanon
[3] Univ Clermont Auvergne, Ctr Rech Odontol Clin, EA 4847, BP 10448, F-63000 Clermont Ferrand, France
[4] St Joseph Univ, Dept Publ Hlth, Beirut, Lebanon
[5] CHU Clermont Ferrand, Dent Dept, F-63000 Clermont Ferrand, France