The structure of dentine after the injection of strontium chloride by backscattered electron imaging in the scanning electron microscope.
The subcutaneous injection of 0.5 ml of 20% aqueous strontium chloride produced a distinct calciotraumatic response in rat incisor dentine. In both the labial and lingual dentine this consisted of an unmineralized layer comprising continuous interglobular spaces. Lingually this unmineralized layer was sharply defined and about 1-2 microns in width but labially it was more irregular, diffuse and difficult to measure. Labially and lingually the dentine formed after the unmineralized layer hypomineralized in comparison to the rest of the dentine. Within the hypomineralized labial dentine a diffuse, more intensely hypomineralized layer was often present. The appearance of the unmineralized layer probably reflects the differences in structure between labial and lingual dentine, that is, small linear calcospherites lingually and large irregular calcospherites labially.
Appleton
J
J
Department of Clinical Dental Sciences, University of Liverpool, U.K.
D000818:Animals; D002118:Calcium; D003804:Dentin / Q000187:drug effects / Q000648:ultrastructure*; D007279:Injections, Subcutaneous; D008855:Microscopy, Electron, Scanning / Q000379:methods; D051381:Rats; D012542:Scattering, Radiation; D013324:Strontium / Q000008:administration & dosage / Q000494:pharmacology*; D016610:Tissue Embedding; D014074:Tooth Calcification / Q000187:drug effects
C025700:strontium chloride; D002118:Calcium; D013324:Strontium