Revista clínica de periodoncia, implantología y rehabilitación oral
versión On-line ISSN 0719-0107
AREVALO PINEDA, M y LARRUCEA VERDUGO, C. Dental bleaching regression caused by chromogenic beverages: In vitro. Rev. Clin. Periodoncia Implantol. Rehabil. Oral [online]. 2012, vol.5, n.2, pp. 57-65. ISSN 0719-0107. http://dx.doi.org/10.4067/S0719-01072012000200001.
This in vitro study established if teeth treated with dental bleaching have a higher change of color over time than those that aren’t treated, when subjected to three chromogenic beverages (coffee, tea and red wine). 45 healthy bovine incisors were used, maintained in 0.9% sodium chloride, at 37ºC. Every specimen was divided into 2 half; one half was subjected to dental bleaching with 35% hydrogen peroxide and the other was taken as control. The color was measured with the Vita EasyShade Spectrophotometer. The specimens were randomly divided in groups of 15, and were immersed in coffee, tea and red wine for 10 minutes, 20 times, the value being recorded after each immersion. The data was analyzed with ANOVA and Tukey test, using 95% of confidence interval. Results show that bleaching significantly modifies (p=0.05) the color in the three groups (GC=85.8 to 95.1; GT=87.4 to 97.3 y GV=90.8 to 99.3). Color relapse in the three groups was observed along the 20 immersions. Initial ΔE values (GC=18.89; GT=22.97; GV=56.46) were significantly different than final ΔE values (GC=5.56; GT=5.38; GV=12.49). The chromogenic beverages stained more the treated group because a higher ΔE units decrease was observed in this group (GCcontrol=20.98-5.01; GTcontrol=17.11-3.66; GV control=54.62-11.49). The three chromogenic beverages produced color relapse in the bleaching teeth, being red wine the one causing more staining. It was concluded that the specimens treated subjected to three kinds of chromogenic, had higher change of color than control group, but at the end the treated group doesn’t get more stained than the control group.
Palabras llave : Dental bleaching; chromogenic beverages; color relapse.