A text-book of dental histology and embryology, including laboratory directions . Dentine from the root, showing tubules cut longitudinally. (About 700 X) numerous throughout the length of the tubule, and theyend in the characteristic spaces of the granular layer ofTomes. The Dentinal Fibrils.—In life the dentinal tubules areoccupied by protoplasmic projections of the odontoblasts THE DENTINAL FIBRILS 177 known as the dentinal fibrils, or fibers of Tomes. As thedentine matrix is formed and calcified under the influenceof the odontoblasts, a portion of their protoplasm is left inthe tubules of
A text-book of dental histology and embryology, including laboratory directions . Dentine from the root, showing tubules cut longitudinally. (About 700 X) numerous throughout the length of the tubule, and theyend in the characteristic spaces of the granular layer ofTomes. The Dentinal Fibrils.—In life the dentinal tubules areoccupied by protoplasmic projections of the odontoblasts THE DENTINAL FIBRILS 177 known as the dentinal fibrils, or fibers of Tomes. As thedentine matrix is formed and calcified under the influenceof the odontoblasts, a portion of their protoplasm is left inthe tubules of the matrix as the dentinal fibril. These Fig. 138. Granular layer of Tomes: L, lacunae of cementum; Gt, granular layer of Tomes;Jg, interglobular spaces. (About 200 X) structures were first described by John Tomes, who recog-nized their true character. They may be demonstratedin decalcified sections, and they will be seen projecting fromthe odontoblasts, when the pulp is removed from a freshly12 178 THE DENTINE extracted tooth, by cracking it and picking the pulp this way a portion of the fibril is pulled out of the fibrils will be considered more especially in connectionwith the pulp, to which they properly belong. The Granular Layer of Tomes.—The granular layer ofTomes is the outer layer of the dentine next to the granular appearance is caused by irregular spaces inthe dentine matrix which connect with the ends of thedentinal tubules, and which are filled with protoplasmcontinuous with that of the fibrils. Tomes first calledattention to this layer, and for this reason it bears his name. With magnifi
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectteeth, bookyear1912
