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Plaster casts of 50 boys and 50 girls aged 3–6 years, from Gujarat, India, were studied to observe the pattern of spacing in the normal deciduous dental arches. Spaced type of dental arches were more common than closed type or ‘no spaces’ type. Spacing/no spacing appeared to behave independently between upper and lower arches and between the sexes. The amount of spacing was greater in males than in females. Bilateral anthropoid spaces did not exist as a single phenomenon. They occurred when some other spaces were also present. Anthropoid spaces were more in the upper arch than in the lower and more in males than in females. If anthropoid spaces occurred in the upper arch, they were frequently missing from the lower arch; this was observed more in females than males. Spacing on the left side was more than the right side. Spacing between the mandibular incisors was the greatest of all.

No abstract

Deciduous tooth crown dimensions are poorly known for the people of South Asia. This contribution describes dental crown dimensions of two prehistoric and one living population from the northwestern region of the subcontinent.

Occurrence of different forms of Carabelli's trait on the maxillary first permanent molar was studied in 489 Hindu children from Gujarat. The trait was absent in 35.4% of the teeth studied. Groove form was observed most commonly. Slight tubercles were found more often than pronounced tubercles, and more tubercles were found in boys than in girls; conversely, absence of this trait was observed more often in girls than boys.