کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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3145789 | 1197104 | 2009 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Effect of fluoridated bleaching gels on the remineralization of predemineralized bovine enamel in vitro Effect of fluoridated bleaching gels on the remineralization of predemineralized bovine enamel in vitro](/preview/png/3145789.png)
ObjectivesThis study evaluated possible differences regarding the remineralization of predemineralized enamel after exposure to fluoridated or non-fluoridated bleaching gels.Methods120 enamel specimens were prepared from sixty bovine incisors; before and after demineralization (37 °C; pH 4.95; 10 d), one-quarter of each specimen's surface was covered with nail varnish (control sound/demineralized). Subsequently, the specimens were stored for 16 h daily in a remineralizing solution (pH 7.0; 14 d), while for the remaining time (8 h) various bleaching gels were applied: (1) no treatment (control), (2) Opalescence regular (O, Ultradent), (3) Opalescence PF (O-PF), (4) Nite White ACP (NW-ACP, Discus Dental) and (5) Nite White ACPF (NW-ACPF). Following, half of the bleached parts were nail-varnished and stored for another 3-weeks period in a remineralizing solution. Differences in mineral losses (ΔΔZ) and lesion depths (ΔLD) before and after treatment/remineralization period were evaluated from microradiographs. ΔΔZsurface values (mineral loss of the outer 18 μm of the lesion) were calculated.ResultsAfter 2 and 5 weeks ΔΔZ/ΔLD values of the bleaching groups did not differ significantly from the controls. Treatment with NW-ACPF for 2 weeks resulted in significantly lower ΔΔZ values compared to NW-ACP (p = 0.032) and NW-ACPF in higher values than Opalescence regular (p = 0.006). Two weeks treatment with O and O-PF resulted in decreased ΔΔZsurface values compared to control (p < 0.0005), whereas with NW-ACPF no significant differences could be observed (p = 0.062). Application of NW-ACP induced significantly increased ΔΔZsurface values compared to control (p = 0.001).ConclusionsNo supporting influence of fluoride-containing bleaching gels on remineralization could be observed.
Journal: Journal of Dentistry - Volume 37, Issue 2, February 2009, Pages 156–162