[1] Qatif Cent Hosp, Dent Dept, Qatif, Eastern Provinc, Saudi Arabia
[2] Indiana Univ, Dept Cariol Operat Dent & Dent Publ Hlth, Div Operat Dent, Sch Dent, Indianapolis, IN USA
[3] Univ Michigan, Sch Dent, Dept Cariol Restorat Sci & Endodont, Ann Arbor, MI 48109 USA
[4] Indiana Univ, Sch Dent, Dept Biomed & Appl Sci, Div Dent Biomat, Indianapolis, IN USA