. The science and practice of dental surgery. ial to this, and betweenthe tooth and the gum, is the gingival space . In this space the epitheUumcovering the inner surface of the gum marginin contact with the neck of the tooth is comjDosedof soft, round, polygonal cells. Though not of aglandular structure, this epithelium secretesmany small rounded cells, lymphoid in character,and termed mucous corpuscles. To this epi-thelium the term gingival organ has beenapplied. As time advances the membranedecreases in thickness ; by the formation of boneon the wall of the alveolus, and of cementum onthe s
. The science and practice of dental surgery. ial to this, and betweenthe tooth and the gum, is the gingival space . In this space the epitheUumcovering the inner surface of the gum marginin contact with the neck of the tooth is comjDosedof soft, round, polygonal cells. Though not of aglandular structure, this epithelium secretesmany small rounded cells, lymphoid in character,and termed mucous corpuscles. To this epi-thelium the term gingival organ has beenapplied. As time advances the membranedecreases in thickness ; by the formation of boneon the wall of the alveolus, and of cementum onthe surface of the root, the thick mass of themembrane is reduced, until finally, in old age most of the vessels are to be found close to thesurface of the bone. The Periodontal Membrane is frequently theseat of diseased conditions, and commonamongst these are several distmct forms ofmflammation. Various groupings of these in-flammatory affections have been suggested bydifferent authorities. For example, Arkovy makes the followingsub-divisions—. Fig. 539.—-Longitudinal section of the periodontal membrane in , Dentine; C, Cementum; P, Periodontal Membrane; B, Bone. Acute Periodontitis (1) Acute marginal periodontitis. (2) Acute apical periodontitLs.(.3) Acute circumscribed periodontitis.(4) Acute diffuse periodontitis.(.5) Acute purulent periodontitis. (6) Apical abscess. (7) Toxic periodontitis. Chronic Periodontitis (1) Chronic apical periodontitis. (2) Chronic diffuse periodontitis. 487 488 (3) Chronic purulent periodontitis. (4) Chronic granulomatous periodontitis. (5) Apical necrosis. (6) Total necrosis. G. V. Black suggests a clinical classifica-tion for diseases of the periodontal membrane : (1) Those beginning at the apex of the root; (2) those begmning at the gum margin; and (3) those beginning at some intermediate por-tion of the periodontal membrane. Others haveclassified them as septic and non-septic, or aspurulent and non-purulent. But the groupingcommonly acce
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectdentistry, bookyear19
