Biostatistical Study on the Zone of Children's Mouth

Abstract

Eight quantitative measurements, i. e. six heights and two widths, were measured by means of Martin's Gleitzirkel on the zone of the mouth—the part of the face below horizontal plane at subnasale and thus eight indices were obtained.
Materials used were 4511 normal healthy boys and girls in the city of Kawasaki.
According to Ogawara's classifiaction, these indices were classified from 1 to 6 and were arranged in the order of I, II, III, A, B, C, SMUG which were named “Formula of the zone of the mouth”. Both investigation of morphological changes of the formula of the zone of the mouth with the advance of development and observation of lateral views of cutaneous and mucous areas of the lip were made with interesting results.