From observation of frequency and measurement of the lengths and widths of enamel hypoplasia on the maxillary and mandibular deciduous canines, extracted from 50 Indians' skulls, the following results were obtained. 1) Enamel hypoplasia occurred in 15% of the maxillary deciduous canines and 44% of the mandibular deciduous canines. 2) Symmetrical cases of enamel hypoplasia occurred in 8.0% of the maxillary deciduous canins and in 34% of the mandibular deciduous canines. The enamel hypoplasia on maxillary deciduous canines showed some association with the enamel hypoplasia on mandibular deciduous canines. 3) The average length of enamel hypoplasia was 1.8 mm in the maxillary canines and 2.3 mm in the mandiblar canines. 4) The average width of enamel hypoplasia was 1.8 mm in the maxillary canines and 2.3 mm in the mandibular canines.
乳犬歯のEnamel hypoplasia
