Journal of Dental Research, Vol 67, 1515-1517, Copyright © 1988 by International & American Associations for Dental Research Online Journals
Cusp height relationships between the upper and lower molars in Japanese subjects
M. Sekikawa, E. Kanazawa and T. Ozaki
Department of Anatomy, Nihon University School of Dentistry, Chiba, Japan.
Relationships of cusp height between the upper and lower first molars and
between the deciduous second molars in Japanese subjects were analyzed with
the aid of moire contourography. In permanent molars, the height of the
hypoconid had a mean value similar to that of the upper trigonal cusps,
indicating that upper and lower functional cusps of the same height occlude
with each other. In deciduous second molars, however, hypoconid heights
were significantly smaller than trigonal cusp heights. Such differences in
cusp height between permanent and deciduous dentition may be related to the
function and phylogeny of tooth or jaw movements.
