A Morphological Study on the Dental Arch of the Chaoxian

Abstract

In order to examine the characteristic of the dental arch of the Chaoxian, the dental arch of three populations (Chaoxian, Han, and Man) in Liaoning Province of China, the Koreans and the Japanese morphological characteristics were observed and measured with the same measuring points and methods. The major findings are as follows. 1) The upper posterior dental arch length of the Chaoxian is the smallest among these populations, and significantly different from the other populations, except for the Man. 2) The upper dental arch breadth of the Chaoxian is the largest, and significantly different from the Man and the Japanese. 3) The conclusion from the cluster analyses indicates that the Chaoxian is the closest to the Koreans in the characteristic of the dental arch. Moreover, we also discuss the effect of the difference on the dental arch, and put forward that the difference on the characteristic of dental arch mainly comes from genetic factor.