Cells for the study of acidic dissolution in packed apatite powders as model systems for dental caries.
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 e...
| Publicado en: | Caries Research Vol. 32; no. 6; pp. 428 - 435 |
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| Autores principales: | , , , , , , |
| Formato: | research Journal Article |
| Publicado: |
Karger AG
Nov/Dec1998
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=50308574&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 50308574 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 00086568 DEU jtl: Caries Research issn: 00086568 maglogo: N pubinfo: dt: Nov/Dec1998 vid: 32 iid: 6 pid: 2485 pub: Karger AG artinfo: ui: 50308574 50308574 NLM9745116 50308574 10.1159/000016483 NLM9745116 50308574 ppf: 428 ppct: 7 formats: tig: atl: Cells for the study of acidic dissolution in packed apatite powders as model systems for dental caries. aug: au: Morgan, H. Wilson, R. M. Elliott, J. C. Dowker, S. E. P. Anderson, P. Wilson, R Dowker, S E affil: Department of Biophysics in Relation to Dentistry, St. Bartholomew's and the Royal London School of Medicine and Dentistry, Queen Mary and Westfield College, London, UK sug: subj: Dental Caries Etiology Dentition Physiology Minerals Time Factors Solubility Methylmethacrylates Hydrogen-Ion Concentration Acids Powders Buffers Radiography Human Industry X-Rays Dental Enamel Spectrophotometry, Infrared Chemistry, Physical Equipment and Supplies Validation Studies Comparative Studies Evaluation Research Multicenter Studies Clinical Assessment Tools ab: 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. pubtype: Academic Journal doctype: research Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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