On extraction, with notes on the anatomy and physiology, of the teeth, for medical students . s much larger than in advanced age. Theveins have very thin walls, in some places only endo-thelial cells, and in the arterioles there are found a fewmuscular fibres, circular and longitudinal. The nerve of the pulp enters the apical foramen asa single branch, and at once divides into numerousbranches, which are intimately connected by fine nakednerve filaments with the odontoblastic laver of cells onthe surface of the pulp. These nerve fibrils are con-nected with the tubules of the dentine (Tomes) th
On extraction, with notes on the anatomy and physiology, of the teeth, for medical students . s much larger than in advanced age. Theveins have very thin walls, in some places only endo-thelial cells, and in the arterioles there are found a fewmuscular fibres, circular and longitudinal. The nerve of the pulp enters the apical foramen asa single branch, and at once divides into numerousbranches, which are intimately connected by fine nakednerve filaments with the odontoblastic laver of cells onthe surface of the pulp. These nerve fibrils are con-nected with the tubules of the dentine (Tomes) throughthe medium of this odontoblastic layer, and by thismeans sensations of pain are conveyed to the pulp from 34 DENTAL PULP AND PERIOSTEUM without. The nerve-tissue of the pulp conveys sensa-tions of pain. Under ordinary circumstances thesepainful sensations are aroused by thermal changes. The periosteum or pericementum of the root isa delicate fibro-connective tissue lying between theroot or roots of the tooth and its alveolar socket, and Dentinalfibres. Odonto-blasts. Bloodvessel. Fig. 12.—-Section of Pulp. (Diagrammatic.) (After Dr. Black.) completely filling up the space between them. Thatthere is a space, and a large one, can be demonstratedby looking at a dry specimen, when the teeth will befound quite movable, and in many cases drop out. The periosteum is highly vascular, and containsquantities of nerves. The vascular and nerve suppliescome from the gingival branch, from branches from DENTAL PULP AND PERIOSTEUM 35 the dental tlivision passing into the root, aiul Ironi thealveolar canals. This membrane is not of an eventhickness, but is thicker and denser at the upper andlower ends, and thin at the middle. It can be dividedinto two disLlnct lavers : an outer, which can be teased
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Keywords: ., bookcentury1800, bookdecade1890, bookidonextraction, bookyear1896
