The Efficacy of Three Different In-office Bleaching Systems and Their Effect on Enamel Microhardness

Polydorou, Olga; Hellwig, Elmar; Hahn, Petra

doi:10.2341/07-148

Cited by 43 publications

(36 citation statements)

References 18 publications

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“…The whitening procedure may lead to dehydration of the teeth, and consequently induce a false, lighter aspect immediately after the end of the session. 26 For this reason, an interval of one week was considered necessupply of the toothpaste type assigned to the group. There were no labels or other types of identification on the toothpaste tubes, only a code for later analysis; both the patient and the operator were blinded.…”

Section: Day 29mentioning

confidence: 99%

The influence of desensitizing dentifrices on pain induced by in-office bleaching

et al. 2013

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The purpose of this study was to evaluate whether the use of desensitizing dentifrices used 15 days prior to and after in-office tooth bleaching could eliminate or reduce tooth sensitivity. After institutional review board approval and informed consent, 45 subjects were selected and divided into 3 groups according to the dentifrice selected: Colgate Total (CT), Colgate Sensitive Pro-Relief (CS) or Sensodyne ProNamel (SP). The subjects used toothpaste and a toothbrush provided to them for 15 days prior to bleaching. They were then submitted to two in-office bleaching sessions (Whiteness HP Blue Calcium). Their tooth sensitivity was assessed using the Visual Analog Scale (VAS) for a week after each session. Their tooth shade alteration was measured with a Vitapan Classical shade guide to determine if the dentifrices could influence the effectiveness of the bleaching agent. The data were submitted to Wilcoxon, Kruskal-Wallis and Mann-Whitney tests (α = 0.05). The use of desensitizing dentifrices did not affect the bleaching efficacy. In regard to tooth sensitivity, there was a statistically significant difference between the results of the Control Group and Group T2 after the first session (p = 0.048). There was no statistically significant difference in the results for the other groups after the first session. In regard to the second session, there was no statistically significant difference in the results for all the groups. The use of a desensitizing dentifrice containing nitrate potassium reduced tooth sensitivity during the bleaching regimen. Dentifrices containing arginine and calcium carbonate did not reduce tooth sensitivity. Color change was not influenced by the dentifrices used.

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Section: Day 29mentioning

confidence: 99%

The influence of desensitizing dentifrices on pain induced by in-office bleaching

et al. 2013

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“…Bleaching effect is also affected by heat 8,23) . Although some researches showed that light irradiation accelerated bleaching efficacy 14,23) , other could not find any efficacy of the light irradiation for the bleaching materials without photocatalyst 19,24) . The bleaching effect of H2O2 generally depends on the extent to which hydroxyl radicals are generated.…”

Section: Discussionmentioning

confidence: 99%

“…The tea was used for staining the teeth in many previous studies concerning tooth bleaching 7,8,15,18,19) , as well-known procedure. The type of tea was chosen according to a number of previous experiments, where the stain solution could develop an intrinsic stain, which was consistent with tooth discoloration observed clinically 7,15,18) .…”

Section: Discussionmentioning

confidence: 99%

Effect of light units on tooth bleaching with visible-light activating titanium dioxide photocatalyst

et al. 2011

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This study evaluated the influence of different light sources on the efficiency of an office bleaching agent containing visible-light activating titanium dioxide photocatalyst (VL-TiO2) using an artificial discoloration tooth model. Extracted bovine teeth were stained by black tea. The CIE L*a*b* values were measured before and after nine consecutive treatments by the VL-TiO2-containing bleaching agent (TiON in Office, GC, Tokyo, Japan). A halogen light unit (CB; CoBee, GC) or an LED unit (G-light, GC) with two modes (blue and violet: GL-BV, blue: GL-B) were used to activate the bleaching agent in three groups (n=8). Brightness (ΔL) and color difference (ΔE) increased as bleaching repeated in all groups. Two-way ANOVA showed that both number of treatments and light sources significantly affected ΔE (p<0.05). GL-BV showed better bleaching effect than GL-B. In measurement of irradiation spectra, CB showed a wide spectrum (380-530 nm), GL-B had a sharp peak at 470 nm and GL-BV showed an additional peak at 405 nm. It was concluded that the light source influenced the efficiency of the tooth bleaching with VL-TiO2.

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“…While some authors reported that no adverse effects were observed, others claimed reduction in calciumphosphate ratio and loss of organic components from treated enamel surfaces. Nonetheless, it is highly probable that low pH and hydrogen peroxide oxidation could lead to ultrastructural changes in dentin during internal dental bleaching 16,17) . The purpose of the current study was to compare the efficacies of cold light bleaching of different bleaching durations and the effects thereof on tooth enamel, and thereby identify the optimal bleaching time for cold light bleaching.…”

Section: Introductionmentioning

confidence: 99%

Efficacy of cold light bleaching using different bleaching times and their effects on human enamel

Wang

Zhu

et al. 2013

Dent. Mater. J.

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This study investigated the efficacy of cold light bleaching using different bleaching times and the effects thereof on tooth enamel. Before and after bleaching, stained tooth specimens were subjected to visual and instrumental colorimetric assessments using Vita Shade Guide and spectrophotometric shade matching. Enamel surface alterations were examined using scanning electron microscopy (SEM) to analyze surface morphology, surface microhardness (SMH) measurement to determine changes in mechanical properties, and X-ray diffraction (XRD) to characterize post-bleaching enamel composition. Cold light bleaching successfully improved tooth color, with optimal efficacy when bleaching time was beyond 10 min. Significant differences in surface morphology were observed among the different bleaching times, but no significant differences were observed for enamel composition and surface microhardness among the different bleaching times. Results of this study revealed an association between the bleaching time of cold light bleaching and its whitening efficacy. Together with the results on enamel surface changes, this study provided positive evidence to support cold light bleaching as an in-office bleaching treatment.

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The Efficacy of Three Different In-office Bleaching Systems and Their Effect on Enamel Microhardness

Cited by 43 publications

References 18 publications

The influence of desensitizing dentifrices on pain induced by in-office bleaching

The influence of desensitizing dentifrices on pain induced by in-office bleaching

Effect of light units on tooth bleaching with visible-light activating titanium dioxide photocatalyst

Efficacy of cold light bleaching using different bleaching times and their effects on human enamel

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