Japanese Journal of Veterinary Research;Volume 20, Number 1-2

FONT SIZE:  S M L

A CASE OF CONGENITAL ABSENCE OF THE LOWER SECOND PREMOLARS IN CATTLE AND A PHYLOGENETIC CONSIDERATION OF ITS ORIGIN

OHTAISHI, Noriyuki

Permalink : http://hdl.handle.net/2115/1987
JaLCDOI : 10.14943/jjvr.20.1-2.7

Abstract

A 7 year-old cow whose lower second premolar was absent on both sides of the jaw was examined. In order to establish whether its absence was congenital or of some other cause, such as caries, examinations were carried out and discussions were held. It was established that this was a case of congenital absence. This is of interest in connexion with the orthogenetic reduction of the cheek teeth on the ruminantia.

FULL TEXT:PDF