Congenital defects of the upper lateral incisors: Multivariate analysis of measurements of the other teeth, the superior arch, head and face
Article first published online: 29 APR 2005
Copyright © 1977 Wiley-Liss, Inc., A Wiley Company
American Journal of Physical Anthropology
Volume 46, Issue 2, pages 245–251, March 1977
How to Cite
Salmon, D. and Le Bot, P. (1977), Congenital defects of the upper lateral incisors: Multivariate analysis of measurements of the other teeth, the superior arch, head and face. Am. J. Phys. Anthropol., 46: 245–251. doi: 10.1002/ajpa.1330460205
- Issue published online: 29 APR 2005
- Article first published online: 29 APR 2005
- Tooth agenesis;
- Upper lateral incisors;
- Multivariate analysis;
- Principal components;
- Discriminant analysis
The survey of a French male population allowed us to ascertain 75 propositi with one or two missing ULI, 59 propositi with one or two reduced ULI and 99 controls on whom measurements (mesiodistal and buccolingual diameters) of all teeth of the superior arch are available. Principal Component Analysis gave a first estimated principal component highly correlated with each of the dental measurements or arch measurements. This size factor was eliminated by observing the plane of the second and third principal components. Strikingly different clusters of MD diameters or BL diameters were observed for the controls, the propositi missing one or two of the ULI and the propositi with reduced ULI. For the controls, the arch length is correlated with the MD molar diameters and the MD incisor diameter, the arch width being isolated from the other measurements. For the propositi with missing ULI, among the dental measurements the MD and BL diameters cluster, the arch length is isolated as are the arch widths. For the propositi with reduced ULI, the arch length is closer to the dental measurements while the widths, especially the first one, are isolated.
The best discriminant measurements are the diameters of the first premolars and the canine, the first arch width and the arch length. Among controls, the arch is narrowed and shorter for the propositi with absence and wider for the propositi with reduction. Teeth measurements are always smaller in propositi.