Principles and practice of operative dentistry . s takes place from the commencement of the process, andcontinues throughout all subsequent phases, the enamel-organ at alltimes covering the dentin bulb, and being adapted to its varying con-tours (Fig. 113). At no time, however, during the process of developmentdo the tissues of .these two organs become united. Sudduth confirms the teaching of Legros and Magitot, and says thereis no union between the enamel-organ and the papilla, nor have vessels ornerve-fibres ever been demonstrated as passing from one to the other. Bodecker takes an opposite
Principles and practice of operative dentistry . s takes place from the commencement of the process, andcontinues throughout all subsequent phases, the enamel-organ at alltimes covering the dentin bulb, and being adapted to its varying con-tours (Fig. 113). At no time, however, during the process of developmentdo the tissues of .these two organs become united. Sudduth confirms the teaching of Legros and Magitot, and says thereis no union between the enamel-organ and the papilla, nor have vessels ornerve-fibres ever been demonstrated as passing from one to the other. Bodecker takes an opposite view, and states that when the enamel-organ is detached from the dentin papilla, as frequently occurs in makingsections, there appears upon the outer surface a delicate fringe, which hebelieves to be the true connection between the enamel-organ and thepapilla. Fig. 114 is here introduced to show the stage of general development ofthe human embryo at the eleventh or twelfth week. At about the eleventh week a notable change has taken place in the. Fig. lof].— jaw of human embryo, seventh to eighth Aveek. Dental ridge -^ Ejnthelial lamina ?As-Epithelial con! Columnarepithelial feli> rolyhedral, m flattened epithelial cell>
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectdentist, bookyear1920
