Evaluation of Sensitivity and Color Change of Different Protocols of In-office Dental Bleaching

Condition(s) studied

Investigational drug(s) / intervention(s)

Standard in-office tooth bleaching: Patients will have their teeth bleached in-office using 40% Hydrogen Peroxide (commercial available product - Opalescence Boost, Ultradent Products International) in two sections with 7 days of interval between sections. In each section, the product will be used during 40 minutes according to manufacturer's instructions.

Alternative in-office tooth bleaching: Patients will have their teeth bleached in-office using 40% Hydrogen Peroxide (commercial available product - Opalescence Boost, Ultradent Products International) in two sections with 7 days of interval between sections. In each section, the product will be used during 20 minutes, will be removed with water, and another application of 20 minutes will be made.

Study summary

Clinical randomized single-blind trial, used to measure the level of tooth sensitivity (TS) after in-office dental bleaching sessions, on volunteers using a modified visual analog scale (VAS). The investigators selected for this study, 40 participants with color 2M2 or darker (Using OM1 - 5M3 Vita bleaching shade guide). The investigators performed two bleaching sessions with a 40% hydrogen peroxide gel with a 1-week interval. Participants were enrolled in two groups. In one group, the bleaching product was used according to manufacturer's instructions (40-minutes application in each section). In the other group, the bleaching product was used in two 20-minutes applications in each section.The investigators recorded the TS up to 48h with a VAS scale and the color at baseline and 30 days after bleaching with a value-oriented shade guide and a spectrophotometer. The risk and intensity of TS and the color change were compared between the two groups.

Eligibility

Primary outcome measure(s)

• Tooth sensitivity — 1 hour after dental bleaching session
  Visual Analogic Scale (0-100) for Tooth Sensitivity. In this case, zero means no sensitivity (a better outcome and 100 means higher sensitivity (worse outcome).
• Tooth sensitivity — 24 hours after dental bleaching session
  Visual Analogic Scale (0-100) for Tooth Sensitivity. In this case, zero means no sensitivity (a better outcome and 100 means higher sensitivity (worse outcome).
• Tooth sensitivity — 48 hours after dental bleaching session
  Visual Analogic Scale (0-100) for Tooth Sensitivity. In this case, zero means no sensitivity (a better outcome and 100 means higher sensitivity (worse outcome).

Trial sites (1)

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