Colorimetric assessment of laser and home bleaching techniques

Area of Science:

• Dental materials science
• Aesthetic dentistry
• Biomaterials

Background:

• Tooth discoloration is a common aesthetic concern.
• Various bleaching agents and techniques exist to improve tooth color.
• Evaluating the efficacy of different bleaching protocols is crucial for clinical practice.

Purpose of the Study:

• To compare the in vitro color change of three tooth bleaching techniques.
• To assess laser-activated hydrogen peroxide and two concentrations of carbamide peroxide.
• To determine the most effective bleaching method for aesthetic dental treatments.

Main Methods:

• Extracted human incisors were divided into four groups: laser-activated 35% hydrogen peroxide (H2O2), 10% carbamide peroxide, 20% carbamide peroxide, and a control.
• Color measurements (CIE L*a*b*) were recorded at baseline, 1 week, and 2 weeks.
• Color difference (delta E*ab) was calculated to quantify bleaching efficacy.

Main Results:

• The 10% and 20% carbamide peroxide groups showed statistically significant color differences compared to the control (p < .01).
• The laser-activated hydrogen peroxide group did not demonstrate a statistically significant color difference from the control group (p > .01).
• The control group exhibited no significant color change over the study period (p > .05).

Conclusions:

• 20% carbamide peroxide resulted in the greatest perceivable tooth color change.
• A single application of laser-activated hydrogen peroxide did not produce a noticeable whitening effect.
• Clinicians may need to consider extended or multiple applications for laser-activated hydrogen peroxide to achieve desired results.