Abstract
To evaluate the loss of mass and the surface roughness of glass
ionomer cements (GIC) after acid challenge (erosion) and simulated tooth
brushing (abrasion). Methods: Ten specimens of each GIC were made:
Vidrion R® (VR) (SS White), Maxxion R® (MX) (FGM) Riva Self Cure®
(RV) (SDI) and Gold Label Light Cured® (GL) (GC). The mass of the
materials was verified before and after the erosion/abrasion challenge.
At the same moments, the mean surface roughness was measured in each
specimen using a surface profile meter. The erosion was produced
immersing the specimens in an acid soft drink and in artificial saliva
in 5s cycles alternately for 10 times. After that, they were submitted
to
simulated tooth brushing (20.000 cycles of brushing). Data were
evaluated using ANOVA and Tukey post test. Results: The erosive/abrasive
challenge didn’t result in significant loss of mass (p=0.009), but
increased the final surface roughness in all GICs (p<0.001). The
higher
surface roughness was observed for conventional GICs (MX and VR),
followed by RMGIC (VR) and the encapsulated GIC (RV). Conclusion: It is
concluded that the erosive and abrasive processes increased the surface
roughness in GICs and the encapsulated GIC was the less affected by
the surface wear factors studied.
In Vitro Evaluation of the Impact of Erosive/Abrasive Challenge in Glass Ionomer Cements by Ana Claudia Rodrigues Chibinski in BJSTR
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