Comparative Clinical Study of Two Tooth Bleaching Protocols with 6% Hydrogen Peroxide

Abstract

Objective. The objective was to compare the clinical efficacy of two different tooth bleaching protocols after 1 and 2 weeks of treatment with an over-the-counter paint-on gel containing 6% hydrogen peroxide. Material and methods. Sixteen volunteer patients (minimum shade A2 or darker on maxillary teeth) were selected to participate in this randomized, single-blind (examiner-blinded), single-center, 2-group clinical trial using a divided mouth model. The product was applied in our clinic to one hemi-arch (Group I) in each patient at two sessions one week apart, making five applications at each session (separated by 10 min intervals). The patients themselves applied the product once a day for 10 days in the other hemiarch (Group II). Efficacy was measured according to the Vita Classical shade guide at baseline and at one and two weeks. Differences between groups (office-treated vs. home-treated hemiarches) were tested by repeated-measures analysis of variance. Results. Significant (P < .05) differences in shade values were detected between pre- and post-bleaching in both groups. The two groups did not significantly differ in tooth shade at the end of the treatment. Conclusions. Treatment with 6% hydrogen peroxide gel using the paint-on system shows significant clinical efficacy whether applied by clinicians or by the patients themselves.

Efficacy of Nonthermal Atmospheric Pressure Plasma for Tooth Bleaching

“…Today's bleaching systems are the result of efforts to increase patient benefits in terms of better bleaching efficacy and ease of use [ 20 ]. Various light sources are being used in dental clinics, as they are known to reduce the total treatment time; however, the bleaching effects caused by such light sources remain unclear [ 21 ].…”

Tooth whitening with hydrogen peroxide in adolescents: study protocol for a randomized controlled trial

“…At-home whitening should be supervised by a dental professional and consists of the application of different concentrations of a peroxide gel (carbamide or hydrogen) to the teeth with the aid of personalized molds [ 9 ]. A number of publications have attested to the efficacy and biological safety of the at-home method [ 2 , 10 , 16 ]. Since the first proposal for home tooth whitening by Haywood and Heymann [ 9 ], both in vitro and in situ studies have demonstrated that whitening does not harm dental tissues and allows surprising esthetic results when properly employed [ 1 , 17 ].…”

“…Complex molecules of organic pigments in the tissues are broken down into simpler hydrophilic molecules through an oxidation-reduction reaction by the action of perhydroxyl ions originating from the degradation of H 2 O 2 [ 1 ]. These simpler molecules are easily removed from the dental tissue when in contact with water, thereby providing the desired whitening effect [ 5 , 6 , 16 – 20 ]. This is the action mechanism of peroxide in both the whitening process performed in the dentist’s office and the self-administered method performed in the comfort of the patient’s own home [ 1 , 5 , 6 ].…”

The degree of tooth colour change after using different concentrations of carbamide peroxide

“…Increased salivation occurs frequently in patients while wearing a splint, which is a common occurrence due to pH change in the mouth. 1,3,5,[8][9][10][11][12][13][14][15][16][17] Zekonis et al examined colour change, recurrence of discoloration and tooth sensitivity after performing two different dental bleaching techniques in the same patient. In-office bleaching technique with 35% hydrogen peroxide gel was used on one half of the upper jaw of the subjects, while at-home night-guard bleaching technique with 10% carbamide peroxide gel was applied on the other half.…”

“…These self-applied bleaching treatments are administered without the consultation and supervision of a dentist. 1,[4][5][6][7][8][9] In-office dental bleaching techniques use high concentrations of hydrogen or carbamide peroxide gel. The gel is placed on a specific surface of the tooth and then activated chemically or by various light and heat sources.…”