Golgi apparatus in an odontoblast. This electron micrograph shows a region of the Golgi apparatus containing numerous large vesicles. Note the abacus bodies (arrows) that contain parallel arrays of filaments studded with granules. x52,000.
dentin. As the cells move centrally, the odontoblastic processes elongate; the longest are surrounded by the mineralized dentin. In newly formed dentin, the wall of the dentinal tubule is simply the edge of the mineralized dentin. With time, the dentin immediately surrounding the dentinal tubule becomes more highly mineralized; this more mineralized sheath of dentin is referred to as the peritubular dentin. The remainder of the dentin is called the intertubular dentin.
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