Comparison of two low sensitivity whiteners

Area of Science:

• Dental Aesthetics
• Materials Science in Dentistry

Background:

• At-home bleaching systems offer patient convenience for tooth whitening.
• Minimizing tooth sensitivity is crucial for patient compliance and satisfaction with bleaching treatments.

Purpose of the Study:

• To compare the whitening efficacy and tooth sensitivity of two commercial doctor-supplied, patient-applied bleaching systems: Rembrandt Xtra-Comfort and Nite White Excel 2Z.
• To determine if one system offers superior whitening or reduced sensitivity for maxillary anterior teeth.

Main Methods:

• A randomized controlled trial involving 46 participants assigned to either Rembrandt Xtra-Comfort or Nite White Excel 2Z.
• Participants used custom-fabricated bleaching stents according to manufacturer instructions for 2 weeks, followed by a 2-week non-bleaching period.
• Daily recording of tray usage and sensitivity; color change measured using the Vita Classic Shade Guide.

Main Results:

• Nite White Excel 2Z (NW2Z) group reported sensitivity on 16% of bleaching days, while the Rembrandt Xtra Comfort group reported sensitivity on 31% of bleaching days (P < 0.0001).
• Both systems demonstrated comparable whitening efficacy, with a median shade change of six tabs after 2 weeks and 5.5-6.0 tabs at 4 weeks.
• No statistically significant difference in shade change was observed between the two products.

Conclusions:

• Nite White Excel 2Z is associated with significantly lower tooth sensitivity compared to Rembrandt Xtra-Comfort during at-home bleaching.
• Both evaluated bleaching systems provide comparable and effective tooth whitening results.
• Patient-applied bleaching systems can achieve significant aesthetic improvements in tooth color.