. The teeth in health and disease . Fro. 18.—Split plate for expanding the dental arch in positionin the month. The incisors, canines, and bicuspids arefrequently seen to have a portion of theirnumber crowded outside the arch, whileothers are pushed inside, some of the teethof the opposite jaw shutting among them insuch a way as to lock them in their irregularpositions. The same teeth are often turned partiallyaround, lapping over one another, or havingtheir sides presented where the fronts ought 56 THE TEETH to be. In some cases the teetli change places,the canine exchanging position with the
. The teeth in health and disease . Fro. 18.—Split plate for expanding the dental arch in positionin the month. The incisors, canines, and bicuspids arefrequently seen to have a portion of theirnumber crowded outside the arch, whileothers are pushed inside, some of the teethof the opposite jaw shutting among them insuch a way as to lock them in their irregularpositions. The same teeth are often turned partiallyaround, lapping over one another, or havingtheir sides presented where the fronts ought 56 THE TEETH to be. In some cases the teetli change places,the canine exchanging position with thelateral, or the lateral with the central, failure of certain teeth to erupt, after theloss of the temporary ones, allows their un-filled spaces to be encroached upon by the. Fro. 19.—Same mouth after treatment with springexpanding plate showing a great improvement in conformation ofjjthe dentalarch. neighbouring teeth, causing a straggling ap-pearance. The same condition often occurs from theloss of teeth by decay or accident where thereis no artificial substitute. Teeth sometimeserupt in the roof of the mouth and deformedand supernumerary teeth appear in differentparts of the arch. Figs. 20 to 22 illustrate the evil results of IRREGULARITY OF THE TEETH 57 the too early removal of the temporary canineteeth.
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Keywords: ., bookcentury1900, bookdecade1900, bookpublisherlondo, bookyear1902
