Double-rooted lower canines.

Abstract

Abstract:According to our investigation of lower canines which were extracted from a hundred Indian skulls, we conclude as follows:1) The frequency of double-rooted canines on the right side is 2 per cent, on the left side is 1 per cent and the total is 1.5 per cent.2) The root is bifurcated into a labial and lingual component.Two teeth, one case from the left-side and one from the right, had a bigger labial root. Another tooth, from the right-side, had a bigger lingual root.3) The tooth on the opposite side to the double-rooted one is generally single-rooted.4) The overall length of the double-rooted tooth is shorter and the labiolingual diameter of the crown is longer in comparison with the canine on the opposite side. 5) In comparison with other populations, the frequency of Indians getting double-rooted lower canines is close to those of coloured populations, but less than Whites.

Sexual dimorphism of the canine roots in theMacaca fuscata

“…Double-rooted lower canines occasionally occur in humans, however, as witnessed by a number of reports (ALEXANDERSEN, 1963;HARBOROW, 1934;IMOTO et al, 1975;KITAMURA et al, 1981; NAITO, 1961;NAMBA et al, 1969;NOZAKA et al, 1976;ONDA et al, 1988). Although morphological research has been conducted on the teeth of the Japanese macaque, Macaca fuscata (BABA, 1979;SAHEKI, 1966), no data has been reported on the number of canine roots.…”