Prevention of dentine erosion by brushing with anti-erosive toothpastes
Abstract
Available online 2 April 2014
Objective
This
in vitro study aimed to investigate the preventive effect of brushing
with anti-erosive toothpastes compared to conventional fluoride
toothpaste on dentine erosion.
Materials and methods
Bovine
dentine specimens (n = 12 per subgroup) were eroded in an artificial
mouth (6 days, 6 × 30 s/day) using either citric acid (pH:2.5) or a
hydrochloric acid/pepsin solution (pH:1.6), simulating extrinsic or
intrinsic erosive conditions, respectively. In between, the specimens
were rinsed with artificial saliva. Twice daily, the specimens were
brushed for 15 s in an automatic brushing machine at 2.5 N with a
conventional fluoride toothpaste slurry (elmex, AmF) or toothpaste
slurries with anti-erosive formulations: Apacare (NaF/1% nHAP),
Biorepair (ZnCO3-HAP), Chitodent (Chitosan), elmex Erosionsschutz (NaF/AmF/SnCl2/Chitosan), mirasensitive hap (NaF/30% HAP), Sensodyne Proschmelz (NaF/KNO3).
Unbrushed specimens served as control. Dentine loss was measured
profilometrically and statistically analysed using two-way and one-way
ANOVA followed by Scheffe‘s post hoc tests. RDA-values of all
toothpastes were determined, and linear mixed models were applied to
analyse the influence of toothpaste abrasivity on dentine wear (p < 0.05).
Results
Dentine
erosion of unbrushed specimens amounted to 5.1 ± 1.0 μm (extrinsic
conditions) and 12.9 ± 1.4 μm (intrinsic conditions). All toothpastes
significantly reduced dentine erosion by 24–67% (extrinsic conditions)
and 21–40% (intrinsic conditions). Biorepair was least effective, while
all other toothpastes were not significantly different from each other.
Linear mixed models did not show a significant effect of the RDA-value
of the respective toothpaste on dentine loss.
Conclusion
Toothpastes
with anti-erosive formulations reduced dentine erosion, especially
under simulated extrinsic erosive conditions, but were not superior to a
conventional fluoride toothpaste.
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