Color Change Stability Using Different Bleaching Gels and Light Sources: An in Vitro Study

Area of Science:

• Dentistry
• Dental Materials Science
• Aesthetic Dentistry

Background:

• Tooth discoloration is a common aesthetic concern.
• Power bleaching techniques offer various approaches for tooth whitening.
• Evaluating the efficacy of different bleaching protocols is crucial for clinical practice.

Purpose of the Study:

• To compare the effectiveness of different power bleaching protocols on tooth color change.
• To assess the color stability of teeth after various bleaching treatments.
• To quantify color change (∆E) using spectrophotometry.

Main Methods:

• In vitro study on 50 incisors and premolars stained with tea solution.
• Five bleaching groups: Snow L (40% HP/20% CP) with diode laser, White Smile (32% HP) with LED, Boost (40% HP) with diode laser, Boost (40% HP) with LED, and unactivated Boost.
• Color parameters measured pre-staining, post-staining, immediately post-bleaching, and 1 week post-bleaching.

Main Results:

• All tested bleaching protocols significantly improved tooth color parameters (∆E).
• Significant color change was observed across cervical, middle, and incisal thirds of the teeth.
• Boost (conventional), Boost plus LED, and White Smile demonstrated superior efficacy compared to Snow L.

Conclusions:

• All evaluated power bleaching protocols effectively induce tooth color change.
• Boost (conventional bleaching), Boost plus LED, and White Smile are more effective than Snow L for tooth whitening.
• Further research may explore long-term color stability and patient-reported outcomes.