The Diagnosis of Depression

CHILDRENBRrrH 1949 was, however, of only slight degree.By and large, therefore, it would appear that there was not a great difference between the dental condition of these two groups of children examined at an interval of two years, though there was perhaps a little more caries in the 1951 group and rather less hypoplasia.Moreover, for each type of tooth there was a somewhat greater amount of caries associated with each grade of M-hypoplasia in this group, although within each of the groups the usual structure-caries relationship held-that is, the worse the structure the greater the liability to caries.We wish to thank the London County Council and the former and present School Medical Officers for permission respectively to carry out the survey and publish the results.We are also indebted to the head teachers and staffs of the schools for their willing help at the time of the inspections.Further, our thanks are due to the Medical Research Council for financing the work, to Dr. W. J. Martin for helpful