Stomatology in general practice : a textbook of diseases of the teeth and mouth for students and practitioners / by H.P. Pickerill.

  • Pickerill, H. P. (Henry Percy), 1879-1956.
Date:
1912
Catalogue details

Licence: In copyright

Credit: Stomatology in general practice : a textbook of diseases of the teeth and mouth for students and practitioners / by H.P. Pickerill. Source: Wellcome Collection.

    97/292 (page 77)
    The next sign is the presence of roughness and loss of tissue in the enamel, and the patient may begin to notice that food tends to collect in that situation ; there is as a rule no pain. When the dentine is reached the tooth begins to become discoloured and the enamel opaque around the area of the cavity—due to the ‘ lateral spread 5 at the amelo- dentinal junction. This should be recognized since it is Fig. 21. Diagrams illustrating caries of various degrees. 1, Early second stage ; myelitis present; no ‘ exposure * ; 2, Third stage : peri- odontitis and commencing gangrene of the pulp. The tooth is elevated in its socket; 3, Early fourth stage ; large central cavity in tooth filled with debris and organisms; absorption of bone, formation of abscess cavity with pus discharging through sinus into mouth. (2 and 3 also illustrate the use of the enamel chisel.) frequently the only visible sign of a cavity, the orifice of the latter being small and tucked away between two teeth and thus, although serious in extent and causing pain, either local or referred, may escape observation. The actual discoloration is due largely to the action of the mesenteric group of bacilli which are chromogenic, i. e. they are not themselves coloured but colour the medium upon which they are developing, in this case the dentine. 1 2 3