Klink-Heckmann U, Gottwald E, Dahl T, Grabowski R
Psychiatr Neurol Med Psychol Beih. 1979;25:131-7.
A longitudinal study has been made of the incidence of caries and malocclusion in 361 high-risk children and 180 control children aged between 4 and 6 years. A comparison of the findings obtained from the two groups showed no remarkable differences in the two areas of examination.
对361名4至6岁的高危儿童和180名对照儿童的龋齿和错牙合发病率进行了纵向研究。对两组研究结果的比较表明，在这两个检查领域没有显著差异。
