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Cells for the Study of Acidic Dissolution in Packed Apatite Powders as Model Systems for Dental Caries
- Source :
- Caries Research. 32:428-434
- Publication Year :
- 1998
- Publisher :
- S. Karger AG, 1998.
-
Abstract
- A number of different designs of cells have been developed for the study of dissolution processes in packed apatite powders. Basic design requirements were that no deleterious processes, such as high temperature sintering or binding agents, were involved, and that there was maximum opportunity for experimental study. One design used alternating filter paper discs and apatite layers (typically 42 mg). At the end of an experiment, the cell could be disassembled and infrared spectra and X–ray powder diffraction patterns made of individual layers. Cells without filter paper discs were also made, but terminal sampling at well–defined depths was more difficult or impossible. The cells were constructed from poly(methylmethacrylate) so the course of dissolution could be monitored by radiography. Subsurface loss of apatite was almost always seen after from 2 weeks to 8 months exposure to buffer solutions at pH 3.0–5.5. The greatest loss of apatite was typically 0.4–2 mm below the surface, which is at a larger distance than usually seen for dental enamel. This may be attributable to the low packing density (typically 35–60 vol%) found in the present systems compared with enamel.
- Subjects :
- Paper
Time Factors
Materials science
Spectrophotometry, Infrared
Infrared spectroscopy
Mineralogy
Sintering
Buffers
Dental Caries
Apatite
Dental Enamel Solubility
X-Ray Diffraction
Apatites
Humans
Polymethyl Methacrylate
Dental Enamel
General Dentistry
Dissolution
Enamel paint
Filter paper
Chemistry, Physical
Hydrogen-Ion Concentration
Radiography
Demineralization
Solubility
Chemical engineering
visual_art
visual_art.visual_art_medium
Powders
Acids
Powder diffraction
Subjects
Details
- ISSN :
- 1421976X and 00086568
- Volume :
- 32
- Database :
- OpenAIRE
- Journal :
- Caries Research
- Accession number :
- edsair.doi.dedup.....7b899c4051e15001c4400f229d8ba8e2