2. Epidemiology ●城市高于农村:城市患龋率50-60%, 农村患龋率36.5% ●沿海地区偏高>60%,龋均4.2, 内陆地区偏低31.1%,龋均2,2 Department Of Oral Pathology, Shandong University 8htp://1.51.214.13Department Of Oral Pathology, Shandong University 8 http://1.51.214.13 城市高于农村:城市患龋率50-60%, 农村患龋率 36.5% 沿海地区偏高 >60%,龋均4.2, 内陆地区偏低 31.1%,龋均2.2