[Changes in the length of dental arches between the age of 3.5 and 8.5 years]

On the basis of a long-lasting study of 109 children (63 girls and 46 boys) carried out between the age of 3.5 and 8.5 years a trial was undertaken of evaluation of the changes taking place in the length of dental arches. In girls and boys at the time of milk teeth (between the ages of 3.5 to 8.5 years) no consistent changes in that length were found. The increase of this length was noted after the age of 5.5 years and was slightly greater in the maxilla than in the mandible.