1. 정의 및 이론적 근거
치석제거술과 치근활택술의 정의
미국 치주학회 용어집 (1986)
Scaling : instrumentation of the crown and root surfaces of the teeth to remove plaque, calculus, and stains from these surfaces
Root planing : a definitive treatment procedure to remove cementum or surface dentin that is rough, impregnated with calculus, or contaminated with toxin
18. Jupiter is a gaseous planet with an atmosphere composed most of hydrogen
A B C
and helium.
D
19. Throughout her career Georgia O'Keeffe paid meticulous attention to her craft:
A B
her brushes were always clean, her colors fresh and brightness.
C