Developmental and Metabolic Aspects of a Monobacterial Plaque of Streptococcus mutans C 67-1 Grown on Human Enamel Slabs in an Artificial Mouth Model
II. Enamel DataNoorda W.D. · Purdell-Lewis D.J. · van Montfort A.M.A.P. · Weerkamp A.H.
State University of Groningen, Dental School, Groningen, The Netherlands
The demineralizing effect of organic acids produced by a monobacterial plaque of Streptococcus mutans C 67–1 grown on flattened human enamel slabs was studied in an artificial mouth. The samples were subjected to microhardness measurements, microradiography and scanning electron microscopy. The results showed that there was a significant degree of softening after the 1st week, which continued to a lesser extent in weeks 2 and 3. The same trend was also seen in the microradiograms. These data demonstrate that the ‘classical picture’ of lesion development showing a clear reduction of mineral in the sample surface after 1 week was followed by deposition of mineral in the surface after 3 weeks. The scanning electron microscopic observations illustrated that the enlarged interprismatic spaces formed the main demineralization pathways. They also showed a change in crystalline structure in the surface zone after 3 weeks of demineralization. The findings agree with previous in vivo studies, indicating that the artificial mouth model yields relevant results.
W.D. Noorda, Dental School, State University of Groningen, Ant. Deusinglaan 1, NL-9713 AV Groningen (The Netherlands)
Published online: November 18, 2009
Number of Print Pages : 7
Vol. 20, No. 4, Year 1986 (Cover Date: 1986)
Journal Editor: Shellis R.P. (Bristol)
ISSN: 0008-6568 (Print), eISSN: 1421-976X (Online)
For additional information: http://www.karger.com/CRE