scholarly journals Association Between In-Office And At-Home Tooth Bleaching: A Single Blind Randomized Clinical Trial

2018 ◽  
Vol 29 (2) ◽  
pp. 133-139 ◽  
Author(s):  
João Lima Rodrigues ◽  
Patrícia Souza Rocha ◽  
Silvia Letícia de Souza Pardim ◽  
Ana Cláudia Vieira Machado ◽  
André Luis Faria-e-Silva ◽  
...  
Keyword(s):  
Clinical Trial ◽  
Randomized Clinical Trial ◽  
Rating Scale ◽  
Maximum Level ◽  
Tooth Bleaching ◽  
Tooth Color ◽  
Color Changes ◽  
Bleaching Procedure ◽  
To Receive ◽  
At Home

Abstract This controlled randomized clinical trial evaluated the effect of associating at-home and in-office bleaching procedures on tooth sensitivity (TS) and bleaching effectiveness. Forty patients subjected to on session of in-office bleaching with 38% peroxide hydrogen. Subsequently, the patients were randomly allocated to receive a second session of in-office bleaching or to use a tray containing 10% carbamide peroxide delivered during 7 consecutive days. The worst TS score reported during or after each bleaching procedure was recorded using a verbal rating scale and TS risk (score different from 0) was calculated. Color changes were measured 7 days after each in-office session (for patients receiving in-office procedures only) or after the end of at-home bleaching (for the combined protocol), and 6 months after the last procedure for both bleaching protocols. Color was assessed by a spectrophotometer and by color match with the Vita Classical and Bleach guide scales. Statistical analyses were carried out to assess possible differences between the protocols regarding the outcomes and to analyze the effect of time of assessment on color changes. The bleaching protocol did not affect the risk for and the maximum level of TS reported, irrespective of the time of assessment. In the color evaluation, the bleaching protocol also did not affect the ultimate tooth color. In conclusion, after one in-office bleaching session, there was no difference in bleaching effectiveness and TS between performing a second in-office session and associating it with 1-week at-home bleaching.

Randomized Clinical Trial on the Efficacy and Safety of Four Professional At-home Tooth Whitening Gels

2014 ◽  
Vol 39 (2) ◽  
pp. 136-143 ◽  
Author(s):  
V Alonso de la Peña ◽  
M López Ratón
Keyword(s):  
Clinical Trial ◽  
Randomized Clinical Trial ◽  
Efficacy And Safety ◽  
Tooth Whitening ◽  
Tooth Color ◽  
Color Changes ◽  
Whitening Agent ◽  
Number Of Patients ◽  
Made In ◽  
At Home

SUMMARY Objective This randomized clinical trial evaluated the efficacy and safety of four gels of differing concentrations used for at-home vital bleaching. Materials and Methods Ninety-six volunteers participated in the study and were divided into four groups of 24 individuals. A gel of differing concentration was used for each group: 10% and 15% carbamide peroxide and 7.5% and 9.5% hydrogen peroxide. The patients used the whitening agent in a tray without reservoirs for one hour per day for two weeks. The measurement of the change in tooth color was made by two observers in the maxillary right central incisor and with a colorimeter in both upper central incisors and canines, using the CIE L*a*b* and CIE L*C*h* values. Sensitivity was evaluated by the participants on a scale with values as follows: 0 = absent, 1 = minor, 2 = moderate, 3 = considerable, 4 = severe. Results At the baseline, the observers noted darker colors than the colorimeter (p<0.01), and there were differences between incisors and canines in all the CIE L*a*b* and CIE L*C*h* values (p<0.001). In all of the groups and for all of the CIE L*a*b* and CIE L*C*h* parameters, there were color changes in the assessments made in the four maxillary teeth after treatment (p<0.001). There were no differences in ΔL* and ΔE* between the groups. The number of patients who experienced sensitivity and the intensity of the sensitivity were not significant. Conclusions There were no differences in the degree of whitening among the different products. With all of the products there was an increase in L*, a decrease in chromatic intensity (C*), and an increase in the value (tone) or hue (h*).

scholarly journals Impact of Microabrasion on the Effectiveness of Tooth Bleaching

2017 ◽  
Vol 28 (5) ◽  
pp. 612-617 ◽  
Author(s):  
Camila Evelyn Perete-de-Freitas ◽  
Paula Damasceno Silva ◽  
André Luis Faria-e-Silva
Keyword(s):  
Hydrogen Peroxide ◽  
Color Change ◽  
T Test ◽  
Tooth Bleaching ◽  
Repeated Measure ◽  
Tooth Color ◽  
Color Changes ◽  
Bleaching Procedure ◽  
To Receive ◽  
Paired T Test

Abstract The aim of the present study was to evaluate the effect of prior microabrasion on the teeth color change and tooth bleaching effectiveness. Eight sound molars were mesio-distally sectioned and the halves were randomly allocated to receive enamel microabrasion or non-abrasion (control) in one of surfaces (buccal or lingual), while the remaining surface received the other treatment. The tooth color on baseline was evaluated by spectrophotometer (CieL*a*b system). After the microabrasion procedure, the tooth color was measured again. Following, the specimens were bleached with 35% hydrogen peroxide for two sessions with one-week interval. The color was re-evaluated 7 days after each section and 30 days after the second session. The effect of enamel microabrasion on color changes was evaluated by paired T-test. Deltas L*, a*, b*, and E were calculated and data submitted to 2-way repeated measure ANOVA followed by Tukey`s test. Paired T-test was also used to assess possible differences on the ultimate color achieved after tooth bleaching. Enamel microabrasion reduced the lightness and increased the redness of specimens. Specimens that received microabrasion presented higher values of ∆L* than control after each bleaching procedure; and higher ∆a* after the 2nd bleaching session. However, the prior enamel microabrasion did not affect the ultimate values of color parameters. Despite enamel microabrasion have modified the tooth color, this procedure did not affect the ultimate results achieved with tooth bleaching using a high-concentrated hydrogen peroxide.

scholarly journals In-Office Tooth Bleaching for Adolescents Using Hydrogen Peroxide-Based Gels: Clinical Trial

2017 ◽  
Vol 28 (6) ◽  
pp. 720-725 ◽  
Author(s):  
Marcela Leticia Leal Gonçalves ◽  
Antonio Carlos da Silva Tavares ◽  
Ana Carolina Costa da Mota ◽  
Luiz Alberto Plácido Penna ◽  
Alessandro Melo Deana ◽  
...  
Keyword(s):  
Clinical Trial ◽  
Hydrogen Peroxide ◽  
Statistical Significance ◽  
Young Patients ◽  
Tooth Bleaching ◽  
Controlled Clinical Trial ◽  
Tooth Sensitivity ◽  
Tooth Color ◽  
Bleaching Procedure ◽  
Shade Guide

Abstract The aim of the present study was to evaluate colorimetric changes and tooth sensitivity in adolescents and young patients submitted to tooth bleaching with 20% and 35% hydrogen peroxide. A randomized, controlled, clinical trial was conducted with 53 patients aged 11 to 24 years who were allocated to groups based on the use of the following commercial products: Whiteness HP - FGM® (35% hydrogen peroxide); Whiteness HP Blue Calcium - FGM® (35% hydrogen peroxide); and Whiteness HP Blue Calcium - FGM® (20% hydrogen peroxide). After the bleaching procedure, the visual analog scale was used to measure tooth sensitivity and the Vita Classical Shade guide was used to determine changes in tooth color. Statistical analysis involved the Friedman, Kruskal-Wallis and Student-Newman-Keuls tests, with p≤0.05 considered indicative of statistical significance. The addition of calcium contributed to a reduction in tooth sensitivity, especially when the lower concentration of hydrogen peroxide (20%) was used. Tooth sensitivity occurred in a transitory way and did not influence the tooth bleaching process. Significant differences in color were found after each of the two bleaching sessions. In-office tooth bleaching was considered an effective method for adolescents and young adults. Further studies in this population are necessary in order to fully evaluate the effects of bleaching in young teeth.

scholarly journals The degree of color change, rebound effect and sensitivity of bleached teeth associated with at-home and power bleaching techniques: A randomized clinical trial

2013 ◽  
Vol 07 (04) ◽  
pp. 405-411 ◽  
Author(s):  
Fatemeh Velayati Moghadam ◽  
Sara Majidinia ◽  
Joseph Chasteen ◽  
Marjaneh Ghavamnasiri
Keyword(s):  
Clinical Trial ◽  
Randomized Clinical Trial ◽  
Color Change ◽  
Rebound Effect ◽  
Color Difference ◽  
Chi Square ◽  
Tooth Color ◽  
Anterior Teeth ◽  
Significant Difference ◽  
At Home

ABSTRACT Aim: The purpose of the present randomized clinical trial was to evaluate the color change, rebound effect and sensitivity of at-home bleaching with 15% carbamide peroxide and power bleaching using 38% hydrogen peroxide. Materials and Methods: For bleaching techniques, 20 subjects were randomized in a split mouth design (at-home and power bleaching): In maxillary and mandibular anterior teeth (n = 20). Color was recorded before bleaching, immediately after bleaching, at 2 weeks, 1, 3 and 6 month intervals. Tooth sensitivity was recorded using the visual analog scale. The Mann-Whitney test was used to compare both groups regarding bleaching effectiveness (∆E 1 ), rebound effect (∆E 2 ) and color difference between the rebounded tooth color and unbleached teeth (∆E 3) while the Wilcoxon compared ∆E within each group. Distribution of sensitivity was evaluated using the Chi-square test (α =0.05). Results: There was no significant difference between groups regarding ∆E 1 and ∆E 3 (P > 0.05). Even though, ∆E 2 showed no significant difference between groups after bleaching as well as at 2 week, 1 month and 3 month follow-up periods (P > 0.05). Although, significant difference was found in ∆E 2 (P < 0.05 Mann-Whitney) between two methods after 6 months and a high degree of rebound effect was obtained with power bleaching. Within each group, there was no significant difference between ∆E 1 and ∆E 3 (P < 0.05 Wilcoxon). The distribution of sensitivity was identical with both techniques (P > 0.05).Conclusion: Bleaching techniques resulted in identical tooth whitening and post-operative sensitivity using both techniques, but faster color regression was found with power bleaching even though color regression to the baseline of the teeth in both groups was the same after 6 months.

A double blind randomized clinical trial of at-home tooth bleaching using two carbamide peroxide concentrations: 6-month follow-up

2008 ◽  
Vol 36 (11) ◽  
pp. 878-884 ◽  
Author(s):  
S.S. Meireles ◽  
S.S. Heckmann ◽  
I.S. Santos ◽  
A. Della Bona ◽  
F.F. Demarco
Keyword(s):  
Clinical Trial ◽  
Randomized Clinical Trial ◽  
Tooth Bleaching ◽  
Carbamide Peroxide ◽  
Double Blind ◽  
At Home

scholarly journals Dental Fluorosis Treatment Can Improve the Individuals’ OHRQoL? Results from a Randomized Clinical Trial

2018 ◽  
Vol 29 (2) ◽  
pp. 109-116 ◽  
Author(s):  
Sônia Saeger Meireles ◽  
Marilia Leão Goettems ◽  
Kaline Silva Castro ◽  
Fábio Correia Sampaio ◽  
Flávio Fernando Demarco
Keyword(s):  
Clinical Trial ◽  
Randomized Clinical Trial ◽  
Endemic Area ◽  
Dental Fluorosis ◽  
Tooth Bleaching ◽  
Treatment Protocols ◽  
Treatment Groups ◽  
Anterior Teeth ◽  
Related Quality ◽  
At Home

Abstract This study aimed to evaluate the effect on oral health-related quality of life (OHRQoL) of two treatment protocols for dental fluorosis in individuals enrolled in a randomized clinical trial. Seventy volunteers, who lived in a fluorosis endemic area in Brazil, and had at least four maxillary anterior teeth showing fluorosis with a Thylstrup and Fejerskov index from 1 to 7, were randomized into two treatment groups (n= 35): GI- enamel microabrasion; or GII- microabrasion associated with at-home bleaching. Microabrasion was performed using 37% phosphoric acid and pumice, and at-home tooth bleaching with 10% carbamide peroxide in a tray. Volunteers completed a questionnaire at baseline and 1-month post treatment to assess changes in OHRQoL, using the Oral Impact on Daily Performance (OIDP). Differences in overall impact scores between and within treatment groups were analyzed with Wilcoxon (within) and Mann-Whitney (between) tests. Changes in performance scores were analyzed using Wilcoxon tests (a< 0.05). One month after treatment, subjects reported improvement in OHRQoL. Both groups showed lower OIDP scores (p< 0.001), but there was no difference between them. Eating, cleaning teeth, smiling and emotional state performance scores were lower after treatment for the whole sample. In conclusion, the treatment with microabrasion improved the OHRQoL in this sample of individuals living in a fluorosis endemic area regardless of the addition of at-home bleaching.

Influence of different thickeners in at-home tooth bleaching: a randomized clinical trial study

2018 ◽  
Vol 23 (5) ◽  
pp. 2187-2198
Author(s):  
Juliana do Carmo Públio ◽  
Marília Zeczkowski ◽  
Jonny Burga-Sánchez ◽  
Gláucia Maria Bovi Ambrosano ◽  
Franscico Carlos Groppo ◽  
...  
Keyword(s):  
Clinical Trial ◽  
Randomized Clinical Trial ◽  
Tooth Bleaching ◽  
At Home

Is a Single Preliminary Session of In-office Bleaching Beneficial for the Effectiveness of At-home Tooth Bleaching? A Randomized Controlled Clinical Trial

2019 ◽  
Vol 44 (4) ◽  
pp. E180-E189 ◽  
Author(s):  
SC Vaez ◽  
ACC Correia ◽  
TR Santana ◽  
MLC Santana ◽  
AC Peixoto ◽  
...  
Keyword(s):  
Color Change ◽  
Tooth Bleaching ◽  
Controlled Clinical Trial ◽  
Fisher Exact Test ◽  
Tooth Color ◽  
Exact Test ◽  
Color Changes ◽  
Time Required ◽  
Preliminary Session ◽  
At Home

Summary Objectives: To evaluate the effect of combining in-office with at-home bleaching procedures in terms of the time required to obtain satisfactory tooth color, final color changes, and tooth sensitivity (TS) reported by patients. Methods and Materials: Twenty-six patients enrolled in this study used 10% carbamide peroxide in a bleaching tray for 1 h/d until satisfactory tooth color was obtained. One-half of the participants underwent a preliminary session of in-office tooth bleaching with 35% hydrogen peroxide for 45 minutes. The time in days for the patients to obtain satisfactory tooth color by at-home bleaching procedures was recorded. The color change of the maxillary canines was assessed using the Vita Bleachedguide 3D Master scale and a spectrophotometer at 1 week and after the end of bleaching procedures. Participants' satisfaction with their smile was recorded using a visual analog scale, and TS was determined throughout the entire treatment. Data were analyzed by t-test, Mann-Whitney test, or Fisher exact test (α=0.05). Results: The combined protocol reduced (by an average of 3.7 days) the time required to obtain satisfactory tooth color but increased the risk and level of TS. No difference in the final tooth color change (around 5.0 shade guide units; ΔE=11.6–14.9), or the level of patients' satisfaction with their smile, was observed. Conclusions: A preliminary session of in-office bleaching reduced the time necessary to obtain satisfactory tooth color with at-home bleaching but increased the risk and level of TS.

scholarly journals Effect of tooth enamel staining by coffee consumption during at-home tooth bleaching with carbamide peroxide

2020 ◽  
Vol 49 ◽  
Author(s):  
João Victor Frazão CÂMARA ◽  
Luine de Paiva Pereira Santos de SOUZA ◽  
Daniel Otero Amaral VARGAS ◽  
Isabel Ferreira BARBOSA ◽  
Gisele Damiana da Silveira PEREIRA
Keyword(s):  
Color Change ◽  
Tooth Enamel ◽  
Correct Diagnosis ◽  
Coffee Consumption ◽  
Tooth Bleaching ◽  
Carbamide Peroxide ◽  
Tooth Color ◽  
Bleaching Procedure ◽  
Group 2 ◽  
At Home

Abstract Introduction Obtaining the result expected during tooth bleaching requires a correct diagnosis of the type of staining presented. The causes of tooth staining differ depending on the etiological factor. Objective To assess the color change caused by the immersion of bovine teeth in coffee solution during at-home tooth bleaching using a 16% carbamide peroxide gel. Material and method Thirty-three sound bovine teeth were assigned to three groups of eleven teeth each: 1 – Teeth bleached (TB) four hours per day for 21 days; 2 – TB four hours per day for 21 days and immersed in coffee solution immediately after tooth bleaching; 3 – TB four hours per day for 21 days and immersed in coffee solution four hours after the end of tooth bleaching. Immersed in coffee was performed for 15 minutes and tooth color was assessed before the start of the bleaching procedure and after 21 days with an intraoral spectrophotometer. Test Shapiro-Wilk was used to assess homoscedasticity and data were submitted to one-factor Analysis of Variance (ANOVA) and Tukey’s test (p <0.05). Result The color change observed in group 1 (5.76 ± 2.74)A was not statistically different from group 2 (8.83 ±5.11)A, which was immersed in coffee solution immediately after tooth bleaching, and from group 3, which was immersed in coffee solution four hours after tooth bleaching (8.20 ±3.71)A. Conclusion Coffee did not interfere with the tooth bleaching results, regardless of the time after the procedure. Hence, diet restrictions are not necessary during tooth bleaching.

Comparison of Whitening Dentifrices on the Effectiveness of In-office Tooth Bleaching: A Double-blind Randomized Controlled Clinical Trial

2019 ◽  
Vol 44 (2) ◽  
pp. 138-145 ◽  
Author(s):  
N Jiang ◽  
C Zhang ◽  
C Agingu ◽  
T Attin ◽  
H Cheng ◽  
...  
Keyword(s):  
Clinical Trial ◽  
Tooth Bleaching ◽  
Controlled Clinical Trial ◽  
Randomized Controlled Clinical Trial ◽  
Double Blind ◽  
Tooth Color ◽  
Color Changes ◽  
Randomized Controlled ◽  
Anterior Teeth ◽  
Repeated Analysis

SUMMARY Objectives: To investigate the effect of whitening dentifrices on the effectiveness of in-office tooth bleaching. Methods and Materials: A double-blind randomized controlled clinical trial was performed. The participants were randomly allocated into three groups according to the different dentifrices used during this clinical trial: regular dentifrice (group C), conventional whitening dentifrice (group CW), and whitening dentifrice containing blue covarine (group CU). All participants received in-office tooth bleaching for the maxillary anterior teeth (two sessions conducted at a one-week interval). Tooth color was measured with a spectrophotometer at baseline (T1), after the first bleaching session (T2), after the second bleaching session (T3); one week after the completion of in-office bleaching (T4); and three weeks after the completion of in-office bleaching (T5). The data were statistically analyzed through repeated analysis of variance and the Tukey test (α=0.05). Results: Sixty participants completed the study (n=20 per group). At T3, group CU exhibited the lowest ΔE values (p=0.008). The ΔE values increased from T4 to T5 in the CW and CU groups, whereas a decrease in ΔE values was observed for group C. Conclusions: The use of a whitening dentifrice containing blue covarine during in-office bleaching reduced color changes. After tooth bleaching, brighter tooth colors were observed in the participants who brushed with whitening dentifrices compared to those who brushed with a regular dentifrice.

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