Korean J Orthod.  1984 Sep;14(2):263-272.

A statistical study of dental crowding and its relationship to tooth size, and arch dimension and shape

Affiliations
  • 1Department of Dental Science, Yonsei University, Korea.

Abstract

This stydy was undertaken to examine the extent to which tooth size and jaw size each contribute to dental crowding. Two groups of dental casts were selected on the basis of dental crowding. One group, consisting of 94 pairs of dental casts (46 males and 48 females) with normal occlusion. A second group, consisting of 84 pairs of dental casts (38 males and 46 females) with crowding. The result were as follows. 1. Mcans and standard deviations of the two groups were used to compare the two groups. 2. Significant differences were observed between two groups on the basis of tooth size, arch dimension and arch perimeter. 3. Between noncrowded group and crowded group, the crowded group was found to have large tooth size than noncrowded group, while smaller arch dimension and perimeter. 4. Significant differences were observed between male and females on the basis of tooth size, arch dimension and arch perimeter. 5. Author found ideal arch shape of normal occlusion.

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