The student's guide to dental anatomy and surgery / by Henry Sewill.

  • Sewill, Henry.
Date:
1876
Catalogue details

Licence: Public Domain Mark

Credit: The student's guide to dental anatomy and surgery / by Henry Sewill. Source: Wellcome Collection.

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    associated with malformation either of the alveolar border or of the body of the jaw. The first class of irregularities rarely occurs in deciduous teeth, for the reason that in this case the chief cause of irregularity—-obstruction by preceding teeth—is absent. Instances of the second class in the infant, although seldom manifest to casual observa¬ tion, are often perceptible to careful examination, es¬ pecially when the deformity affects the jaw generally. Irregularities of the temporary teeth, whatever their character, are, however, of little practical importance, since the teeth are shed in early life, and the defor- •j ' mi ties do not call for treatment. It was explained in the previous section that, during the process of eruption the teeth are not closely em¬ braced by bone, and that it is not until some time after the crowns have fully emerged from the wide orifices of the crypts that the alveoli become fully formed, and invest closely the necks and roots of the teeth. During Fig. 18. this stage of growth, when the advancing teeth are surrounded by soft, readily yielding tissues only, any slight obstacle to their progress suffices to divert them