. Zeitschrift des New York Institute of Stomatology, American Academy of Dental Science, Harvard odontological Society und des Metropolitan District (Mas . e Emailorgan selbst. (Abb. IV und Y). Die meisten dieser Sprossbildung, zusammen mit der epithelialen Stranghieraus, verkümmern und verschwinden schließlich.Doch einige von ihnen, und ebenso Teile des Hauptstranges, Und des Epithels, das mit der Bildung des Zahnwurzels verbunden ist, bestehen als kleine Einschlüsse oder Nester von Epithelzellen, die Malassey als Schutt Epitheliaux paradiesaires bezeichnete. (Abb. 236 DAS JOURNAL. VI.) Gemäß Th

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. Journal of the New York Institute of Stomatology, American Academy of Dental Science, Harvard Odontological Society and the Metropolitan District (Mas . e enamel organ itself. (Fig. IV and Y). Most of these buddings, together with the epithelial strandfrom which they are derived, ultimately atrophy and disappear.Yet some of them, and likewise parts of the main strand, and ofthe epithelium connected with the formation of the tooth rootpersist as small inclusions or nests of epithelial cells, whichMalassey designated debris epitheliaux paradentaires. (Fig. 236 THE JOURNAL. VI.) According to this observer, these inclusions have the inherentpotentiality of proliferating and of developing under suitableconditions or stimuli into cysts or solid masses of squamous oradamantine cells, or neoplasms composed of both forms of cells.This hypothesis attributes to these inclusions the source of allcysts of the jaw, so according to it the pathological importanceof the debris is extreme. The hypothesis explains several per-plexing features of the cysts, namely, the epithelial lining of theunilocular or root cysts which occur in or near the peridental. Fig. 5. Enlarged photographed of Fig. 4. D, showing small buddings of cells from the main strand. membrane, a situation where no epithelium normally lies: thefrequent occurrence of two or more supernumerary teeth in con-nection with the dentigerous cysts; and the occasional develop-ment of a multilocular cyst as the form of recurrence after theremoval of other varieties of cysts. As lias been said, the structural and clinical characteristicsof the cysts present marked differences. The dentigerous cyst, I Fig. VII >, which is sometimes calleda follicular dental cyst by reason of the theory that it arisesthrough dilatation of a follicle of a rudimentary or supernumer- THE JOURNAL. 237 ary tooth, is usually single and of moderate size, rarely becom-ing larger than a small orange. It is as a rule situated near themolars between the t

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