Brown, W.A.B., Christofferson, P.V.,Massler, M., and Weiss, M.B. (1960). Postnatal Tooth Development in cattle, American Journal of Veterinary Research, International Journal of Osteoarchaeology. 21: 7-34   Abstract     Download

Brown, W. A. B. (1960). Eruption of the first permanent incisor in cattle. Transactions of the European Orthodontic Society. 1-4. Abstract     Download

An analysis of x-rays taken of the mandibular incisor region of 869 cattle shows the first permanent incisor develops, at six months of age, at right angles to its final erupted position eighteen months later. Its eruption path rotates through 900 .

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