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Effect of Whitening Dentifrices on Short-Term Color Stability and Tooth Sensitivity After In-Office Bleaching: A
Adem Gok1, Begum Koprucuogullari2
1Faculty of Dentistry, Department of Restorative Dentistry, Firat University, Elazig, Turkey.
Summary
Whitening toothpastes did not significantly differ in tooth color stability after bleaching. However, a desensitizing toothpaste reduced early tooth sensitivity following the procedure.
Area of Science:
- Dental Science
- Cosmetic Dentistry
- Clinical Research
Background:
- In-office bleaching is a common cosmetic dental procedure.
- Maintaining tooth color stability and managing post-bleaching sensitivity are crucial for patient satisfaction.
Purpose of the Study:
- To evaluate the impact of various whitening dentifrices on short-term color stability and tooth sensitivity after professional tooth whitening.
- To compare the efficacy of different whitening mechanisms (abrasive, optical, chemical) and a desensitizing agent.
Main Methods:
- A randomized, single-blind clinical trial involving 120 participants undergoing in-office bleaching with 40% hydrogen peroxide.
- Participants were assigned to six groups using conventional or five different whitening dentifrices, one with potassium nitrate.
- Tooth color was measured spectrophotometrically (CIELAB system, ΔE*ab) at baseline and multiple follow-up points up to 3 months. Tooth sensitivity was assessed using a numeric rating scale.
Main Results:
- No statistically significant differences in tooth color change (ΔE*ab) were observed among the dentifrice groups at any evaluation time point.
- A significant time × group interaction indicated different color change patterns over time, with the control group showing a reduction in ΔE*ab at 3 months.
- Tooth sensitivity peaked within 48 hours post-bleaching and resolved within 7 days. The dentifrice with desensitizing agents showed significantly lower early sensitivity scores.
Conclusions:
- While no significant intergroup differences in color change were found at specific time points, distinct intragroup color change patterns emerged over time.
- Tooth sensitivity following bleaching is transient and manageable, with formulations containing desensitizing agents offering improved comfort during the early post-treatment period.
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