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Structure of dental glass-ionomer cements by confocal fluorescence microscopy and stereomicroscopy.

Authors
  • Fano, L
  • Fano, V
  • Ma, W Y
  • Yang, G W
  • Zhu, F
Type
Published Article
Journal
Biomaterials
Publisher
Elsevier
Publication Date
Sep 01, 2001
Volume
22
Issue
17
Pages
2353–2358
Identifiers
PMID: 11511032
Source
Medline
License
Unknown

Abstract

The microstructure of four cements, setting by different mechanisms (acid-base, dual cure, triple cure), was studied. The porosity of unpolymerized materials was detected by stereomicroscopy. After polymerization and storage in water or lactic acid solution, the porosity, filler distribution and gel layer, which was formed at the filler/matrix interface of polymerized materials, were examined by confocal laser microscopy. For this purpose, the specimens were treated with fluorescent dye solution before the test. The results showed that hydrolytic degradation (pH 7) mainly involved the resin matrix, and the acid erosion (pH 3.5) involved the gel layer too. As regards the filler, materials with different setting mechanism released the glass particles in different times. The loss of the filler particles occurred quicker in acid-base setting cements, and slower in triple-cured material.

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