STUDIES ON DENTAL CARIES

¹ National Institute of Health, U.S. Public Health Service, Washington, D.C.

Epidemiological analysis of dental examination findings on a group of approximately 6,000 school children of Hagerstown, Maryland and environs reveals that the 28 permanent teeth (third molars are not included in the study) tend to fall into 5 caries-susceptibility classes, the different types of teeth included within the single classes showing markedly similar caries susceptibility. The classes are, in descending order of susceptibility:

Class I. Mandibular first and second molars.

Class II. Maxillary first and second molars.

Class III. Mandibular second premolars, maxillary first and second premolars, and maxillary first (central) and second (lateral) incisors.

Class IV. Maxillary canines and mandibular first premolars.

Class V. Mandibular first (central) and second (lateral) incisors, and mandibular canines.

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