. Journal of the New York Institute of Stomatology, American Academy of Dental Science, Harvard Odontological Society and the Metropolitan District (Mas . ular, andadamantine. All of these have in common one important andessential feature, that is, they are in structure of epithelial deriv-ation and type. Yet in spite of this one similarity they must beregarded clinically as different processes; the dentigerous cystspresent marked individual peculiarities; the unilocular are dis-tinctly unique ; and only the multilocular and adamantine can beconsidered together as closely related. Before discu
. Journal of the New York Institute of Stomatology, American Academy of Dental Science, Harvard Odontological Society and the Metropolitan District (Mas . ular, andadamantine. All of these have in common one important andessential feature, that is, they are in structure of epithelial deriv-ation and type. Yet in spite of this one similarity they must beregarded clinically as different processes; the dentigerous cystspresent marked individual peculiarities; the unilocular are dis-tinctly unique ; and only the multilocular and adamantine can beconsidered together as closely related. Before discussing each THE JOURNAL. 235 type separately we shall consider the really fascinating questionof the origin of these cysts as a whole. The subject has been the source of much discussion andvarious hypotheses have been elaborated; but the one whichbest explains all the phenomena and to which the fewest validobjections can be offered is that of Malassez. This investigator,in the study of the development of the teeth, found in connec-tion with the infolding of the squamous epithelium of the mouth,which leads to the formation of the enamel or adamantine. Fig. 4. A. Mucous membrane of gum. B. Developing tooth. C. Tooth follicle filled with adamantine or enamel cells. D Strand of squamous epithelial cells derived from the infolding of the mucous membrane of the Bone developing from each side over tooth; showing how rests of epithelial cells may ultimately liewithin the bone. organ, outbuddings of the cells at various levels from the gumto the enamel organ itself. (Fig. IV and Y). Most of these buddings, together with the epithelial strandfrom which they are derived, ultimately atrophy and 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 th
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