Identifier: exteriorofhor00goub (find matches)
Title: The exterior of the horse
Year: 1892 (1890s)
Authors: Goubaux, Armand, 1820-1890 Barrier, Gustave Harger, Simon J. J
Subjects: Veterinary medicine Horses CHR 1892 PRO McCarthy, Philip J. (stamp) (PSPA copy) PRO McNeil, John H. (autograph) (Fairman Rogers copy 1) PRO McNeil, John H., Mrs. (donor) (Fairman Rogers copy 1) PRO Lee, Donald A. (autograph) (donor) (Fairman Rogers copy 2)
Publisher: Philadelphia : J.B. Lippincott Company
Contributing Library: University of Pennsylvania Libraries
Digitizing Sponsor: Lyrasis Members and Sloan Foundation

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tion of length has a definite importance in that whichconcerns : 1st, the deformity of the opposite jaw, which is curved more or lessforward than normal ; 2d, great difficulty in the prehension of food, especiallyin horses feeding on pasture ; 3d, finally, an absolute obstacle to the determina-tion of the age. Brachygnathism is superior (Fig. 317) or inferior (Fig. 318) ; the former ismore rare than the latter. The incisors, in both cases, are of great length. Asto the molar arcades, they are normal. The malformation, therefore, only altersthe dimensions of the superior or inferior interdental spaces. When the incisors still touch each other, the wear due to the friction involvestheir contiguous faces, and produces here, ordinarily, a very oblique bevelling. 1 From /Spax^îj short, and yvà6o<;, jaw. = It will be remarked that superior brachygnathism, for example, is accompanied by inferiorprognathism, more or less marked, and vice versa. IRREGULARITIES OF THE DENTAL APPARATUS. 737
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Fig. 318.—Inferior brachygnathism. 47 738 THE EXTERIOR OF THE HORSE. Let us add that the teeth of the shorter jaw, by increasing excessively inlength, are at times capable of injuring the corresponding parts of the oppositejaw, the region of the barbs or the hard palate, according to the case. Our colleagues, Messrs. Weber and Mitaut, have each observed an exampleof inferior brachygnathism in which pressure was made on the hard palatealmost to the point of perforation. B.—Excess of Width of the Superior Incisive Arcade.—An excessof width of the superior incisive arcade is quite frequently met. When the jawsare closed, the latter overlaps the inferior arcade in front and upon the sides,over its whole periphery. This is probably the beginning of what we will studya little farther on under the name parrot mouth. 7. Irregularities through Excess or from Insufficient Wear. § 1. Incisor Teeth. In general, the incisors always preserve the same length of theirfree part, although they d

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