Influence of using different toothpaste during bleaching with violet LED light (405 nm) on the colour and roughness of dental enamel: an in vitro study.

This in vitro study aimed to investigate potential changes in the color and roughness of dental enamel resulting from the use of different toothpaste formulations during bleaching with violet LED light (405 nm). Sixty specimens of bovine incisors, each measuring 6 × 6 × 3 mm, were segregated into six distinct experimental groups based on their respective treatments (n = 10): C + VL: Brushing with Colgate Total 12 + bleaching with violet LED; LB + VL: Brushing with Colgate Luminous White Brilliant + bleaching with violet LED; LI + VL: Brushing with Colgate Luminous White Instant + violet LED bleaching; C: Brushing with Colgate Total 12; LB: Brushing with Colgate Luminous White Brilliant; LI: Brushing with Colgate Luminous White Instant. The examined variables included alterations in color (∆L*, ∆a*, ∆b*, ∆Eab, and ∆E00), surface roughness (Ra), and scanning electron microscopy observations.