In Vivo Degradation of Bleaching Gel Used in Whitening Teeth

Matis, Bruce A.; Gaião, Ubiracy; Blackman, Darrin; Schultz, Franklin A.; Eckert, George J.

doi:10.14219/jada.archive.1999.0172

Cited by 78 publications

(63 citation statements)

References 8 publications

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“…HP products are active for 30 to 60 minutes, 31 and CP products are active for two to 10 hours. 32 It was previously believed that an HP whitening agent would bring about faster results compared with a CP whitening agent of similar concentration. These claims were based on the fact that CP has to chemically break down into HP and urea in order to be effective.…”

Section: Discussionmentioning

confidence: 99%

Comparison of Two At-home Whitening Products of Similar Peroxide Concentration and Different Delivery Methods

Costa¹,

McPharlin²,

Hilton³

et al. 2012

Operative Dentistry

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SUMMARY Purpose This study compared the whitening efficacy, side effects, and patients' preferences/perceptions of two whitening systems of similar peroxide concentration but different formulation and delivery methods. Methods The tooth color change of 24 participants was measured using a shade guide (BSG) and a spectrophotometer (ES). Color difference was calculated: ΔE* = [(ΔL*)2 + (Δa*)2 + (Δb*)2]1/2. One whitening treatment was randomly applied to the right or left maxillary anterior teeth and the other was applied to the contralateral teeth, at-home with 35% carbamide peroxide in a tray (TW) or with 14% hydrogen peroxide in strips (WS). The tooth color was evaluated at baseline, 15 and 30 days (15 days postwhitening). Participants rated their tooth and soft tissue sensitivity (1–10 scale) and completed a questionnaire on their preferences. Results were analyzed by repeated measurement regression analysis/Tukey and Mann-Whitney (p<0.05). Results At 15 days, the teeth treated with TW and WS presented ΔE* = 7 and 6, respectively (ΔBSG=3 for both), and at 30 days, they presented ΔE* = 7.5 and 6.5, respectively (ΔBSG=3 for both). There was no significant difference in tooth and soft tissue sensitivity between treatments. No participant reported tooth and gingival sensitivity at the postwhitening appointment. Of the participants, 83% preferred the TW over WS. Conclusion Both ΔE* and ΔBSG showed no significant difference in tooth color change between TW and SW at either time point. By the end of the study no participants reported tooth and gingival sensitivity. Participants preferred TW over SW.

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Section: Discussionmentioning

confidence: 99%

Comparison of Two At-home Whitening Products of Similar Peroxide Concentration and Different Delivery Methods

Costa¹,

McPharlin²,

Hilton³

et al. 2012

Operative Dentistry

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“…An experienced researcher undertook all sampling. A chemistry technique was employed as described in the U.S. Pharmacopeia USPXXII NFXVVII, 1995 Hydrogen peroxide assay 17) , and previously used in other similar studies [18][19][20] . A hydrogen peroxide assay with potassium permanganate was used.…”

Section: Methodsmentioning

confidence: 99%

A study of in vivo degradation of two vital home bleaching gels

Peña

Carreira²,

Aneiros³

et al. 2013

Dent. Mater. J.

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This study investigated hydrogen peroxide (H 2 O 2 ) concentration of two home bleaching gels, in their dispensing syringes and their degradation in vivo in intraoral bleaching trays. Two bleaching gels were studied, 7.5% hydrogen peroxide (HP) and 20% carbamide peroxide (CP). The concentration of H 2 O 2 was determined in dispensing syringes. Twenty individuals were involved in this study. The gels were placed in trays of both arches and their degradation determined at 5, 10, 15, 20, 30, 40, 60 and 75 min. The concentrations of H 2 O 2 in syringes were (HP) 8.12% and (CP) 7.95%. For the HP gel in custom-trays the concentration of H 2 O 2 was 73% at 5 min and 42% after 75 min. In the 20% CP gel it was 75% at 5 min and 39% after 75 min. Activity decreased linearly up to 75 min, where the mean concentration of H 2 O 2 exceeded 35% for the CP and HP gels.

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“…The active agent in carbamide peroxide is available in trays for more than 10 hours (10% remained by this time). 90 The method of delivery can also have an effect on the peroxide released into the mouth. Comparing a 5% H 2 O 2 strip with 10% carbamide peroxide in a tray both applied for 30 minutes on alternate days revealed that the peroxides in saliva are higher with the strips than the tray.…”

Section: Bleaching Productsmentioning

confidence: 99%