Notes on dental anatomy : a pocket Tomes / arranged by T.W. Widdowson.

  • Widdowson, T. W. (Thomas William), 1877-
Date:
[1906]
Catalogue details

Licence: In copyright

Credit: Notes on dental anatomy : a pocket Tomes / arranged by T.W. Widdowson. Source: Wellcome Collection.

Provider: This material has been provided by The University of Leeds Library. The original may be consulted at The University of Leeds Library.

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    Properties.—Yellowish white, hard, elastic. Fractured dry dentine is lustrous, due to the presence of air in the tubes. When the lime salts have been removed by acids, the matrix yields a cartilagenous substance. If this be boiled for some time gelatine results with a small residue of elastin. Composition.—Organic matter, 2G per cent. Water ... 8 „ Salts—Calc. Carb. Mag. Carb. Calc. Phos. V 66 per cent. Mag. Phos. j Calc. Flouride, &c. / In the dentine or ivory of the Elephant, there is about 45 per cent of organic matter. The dentinal tubes are finer, there is a greater number of secondary curvatures, and also interglobular spaces, thus rendering the dentine of the elephant more elastic than man's. Structure.—Human dentine is fibrous, but has usually no visible structure this being masked by the dentinal tubes. According to Mr. Mummery, carious or decalcified dentine shows an appearance like that of connective tissue fibres. This may also be seen in vaso-