Principles and practice of operative dentistry . rs and cuspids (Fig. 168),and about a week later in the cusps of the molars. The process beginsupon the surface of the dentinal bulb or papilla, by the formation of layersor laminae, one within the other, the size of the papilla gradually de-creasing as each new lamina is formed until it reaches the size prescribedfor it by nature. Some time before the beginning of the process of calcification of thedentin there is a layer of cells developed upon the surface of the papilla,ovoid in form, and having a long process upon the end, which pointstoward
Principles and practice of operative dentistry . rs and cuspids (Fig. 168),and about a week later in the cusps of the molars. The process beginsupon the surface of the dentinal bulb or papilla, by the formation of layersor laminae, one within the other, the size of the papilla gradually de-creasing as each new lamina is formed until it reaches the size prescribedfor it by nature. Some time before the beginning of the process of calcification of thedentin there is a layer of cells developed upon the surface of the papilla,ovoid in form, and having a long process upon the end, which pointstowards the enamel-organ (Fig. 169). These cells have already been men-tioned, and were termed by Waldeyer the odontoblasts or dentin-buildingcells. This layer of cells constitutes the memhrana ehoris of the older writers. The form of the odontoblasts varies considerably at different periods ofthe evolution of the dentin. In the early stage, just prior to the commence-ment of the process of calcification, the cells are generally ovoid and have Enamel. Inter-globularii spaces Dentin Fig. —Vertical section of enamel and dentin, showing laterglobular spaces. < 110.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectdentist, bookyear1920
