. Oral pathology and practice. A text-book for the use of students in dental colleges and a hand-book for dental practitioners. gressive in their nature. And yet, because of its con-nection with vital tissue, the proportion of living matter in itscomposition, which though small, is constant, as well as the fact ofits genetic origin from bone, of which it is a modification, its con-sideration as inorganic is forbidden. 228 ORAL PATHOLOGY AND PRACTICE. These facts indicate that enamel degenerations are not, strictly-speaking, pathological, and that their treatment must be from achemical and mech
. Oral pathology and practice. A text-book for the use of students in dental colleges and a hand-book for dental practitioners. gressive in their nature. And yet, because of its con-nection with vital tissue, the proportion of living matter in itscomposition, which though small, is constant, as well as the fact ofits genetic origin from bone, of which it is a modification, its con-sideration as inorganic is forbidden. 228 ORAL PATHOLOGY AND PRACTICE. These facts indicate that enamel degenerations are not, strictly-speaking, pathological, and that their treatment must be from achemical and mechanical standpoint, rather than from one which ismedicinal or vital. By this it is not meant that therapeutic agentsare never to be employed, or that special remedies may not some-times be useful. But such agents should either be directed towardthe stimulation of constitutional functional activity, or the neutral-ization of deleterious products, the result of some vital derange-ment. Thus general alterative treatment may change the char-acter of environing secretions, or local applications may make them innocuous. Fig. Cast of the Lower Jaw of the Qase Represented in Fig. 66. A Very Thin Edgeof Enamel Appeared at the Cervical Margins of a Few of the Teeth. Therewas None upon the Occlusal Surfaces, the Dentine being Exposed and of aLight Amber Color. The imperfections of enamel may be divided into two classes:those which are formative or natural, and those which are deriva-tive or acquired. The first of these will consist of the structuralimperfections produced by aberrant conditions during the processof development, while the latter will be the result of subsequentabnormal and unnatural environments, or the subjection of theteeth to exceptional conditions. The first named will be apparentwhen the teeth are erupted, while the last will only be observed as anatural effect of the anomalous surrounding circumstances. It has already been asserted that enamel is a modification of
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