# The laser used in pit and fissure sealants is: A. Nd-Yag B. CO2 C. Tungsten D. Ultraviolet # Moderate crowding is considered when space loss is: A. 3-5 mm B. 5-7 mm C. 2-3 mm D. 10 mm # The easiest method of brushing in children is: A. Bass B. Fone's C. Modified Bass D. Scrub