title: The effect of irradiation distance on microhardness of resin composites cured with different light curing units.
authors.affiliation: Research associate, Dental School of Technology, Hacettepe University, Ankara, Turkey.
authors.forename: Isil
authors.initials: I
authors.lastname: Cekic-Nagas
authors.forename: Ferhan
authors.initials: F
authors.lastname: Egilmez
authors.forename: Gulfem
authors.initials: G
authors.lastname: Ergun