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Effect of prolonged erosive pH cycling on different restorative materials.
- Source :
- Journal of Oral Rehabilitation; Dec2008, Vol. 35 Issue 12, p947-953, 7p, 5 Diagrams, 2 Charts
- Publication Year :
- 2008
-
Abstract
- This in vitro study evaluated the effect of a prolonged erosive pH cycling on the superficial microhardness change (SMHC) and the erosive wear of different restorative materials. Eighty enamel specimens with prepared cavities of 1·5 × 1·5 mm were randomly divided into eight groups according to the restorative materials used for the fillings (RMGI – resin-modified glass–ionomer, CGI – conventional glass–ionomer, CR– composite resin, A – amalgam) and immersion media used (ERO – erosive medium or SAL – artificial saliva). During 35 days, half of the specimens were immersed in a cola drink (ERO), for 5 min, three times a day, and they remained in SAL between the erosive cycles. The other half of the specimens was immersed in SAL only, for the entire experimental period (control). Data were tested for significant differences byanova and Tukey’s tests ( P < 0·05). Scanning electron microscopy images were made to illustrate the enamel erosive wear and restorative materials alterations. The mean SMHC (%) and mean erosive wear (μm) of the materials were: RMGI-ERO (30/0·5); CGI-ERO (37/0·5); CR-ERO (−0·3/0·3); A-ERO (−4/0·3); RMGI-SAL (4/0·4); CGI-SAL (−6/0·4); CR-SAL (−3/0·2) and A-SAL (2/0·4). Scanning electron microscopy images showed pronounced enamel erosive wear on groups submitted to erosive pH cycling when compared with groups maintained in saliva. In conclusion, the prolonged pH cycling promoted significantly higher alterations (SMHC and erosive wear) on the glass–ionomer cements than the CR and amalgam. [ABSTRACT FROM AUTHOR]
- Subjects :
- TOOTH erosion
DENTAL pathology
ELECTRON microscopy
DENTAL fillings
DENTAL amalgams
Subjects
Details
- Language :
- English
- ISSN :
- 0305182X
- Volume :
- 35
- Issue :
- 12
- Database :
- Complementary Index
- Journal :
- Journal of Oral Rehabilitation
- Publication Type :
- Academic Journal
- Accession number :
- 35324050
- Full Text :
- https://doi.org/10.1111/j.1365-2842.2008.01856.x