Result: Among 12-year-olds, Angle Class I, Class II and Class III molar relationship were recorded in 38.0%, 33.3% and 21, 7% respectively.
Kết quả: Ở trẻ 12 tuổi, khớp cắn hạng I theo Angle chiếm 38,0%, hạng II - 33,3%, hạng III - 21,7%.