Cesar Penazzo Lepri1, Regina Guenka Palma-Dibb. 1. Faculdade de Odontologia da Universidade de Uberaba - UNIUBE, Departamento de Biomateriais, Av. Nenê Sabino, 1801, Sala 2D09 - Bairro Universitário, CEP: 38055-500 - Campus Aeroporto - Uberaba/MG; Tel:+55 34 3319-8958; e-mail:cesarlepri@yahoo.com.br.
Abstract
AIM: This study evaluated the influence of surface sealant (Fortify-Bisco) on the color-stability of a composite resin (Charisma-3M) immersed in different beverages. METHODS: It was prepared resin specimens with 10 mm-diameter X 2 mm-thickness for each beverage (soft drink, coffee, tea and artificial saliva=control). Specimens were divided in 2 groups (with or without surface sealant) and afterwards divided in 4 subgroups (n=7) according to the immersion solution. After 24 hours, it was started the cycling in the solutions 3 times/day during 5 minutes for 90 days. Opacity (ΔL) and color change (ΔE) of specimens were analyzed with a spectrophotometer (BYK-Gardner) in the different groups in relation to the control group. This handheld portable equipment is unique. RESULTS: Composite resin showed statistically significant difference (p<0.05) in the solutions, and coffee promoted the higher color change, followed by tea and soft drink. There was no difference between specimens sealed or not. CONCLUSIONS: Therefore, surface sealant was inefficient on the protection against color change and coffee promoted the higher darkening of the specimens.
AIM: This study evaluated the influence of surface sealant (Fortify-Bisco) on the color-stability of a composite resin (Charisma-3M) immersed in different beverages. METHODS: It was prepared resin specimens with 10 mm-diameter X 2 mm-thickness for each beverage (soft drink, coffee, tea and artificial saliva=control). Specimens were divided in 2 groups (with or without surface sealant) and afterwards divided in 4 subgroups (n=7) according to the immersion solution. After 24 hours, it was started the cycling in the solutions 3 times/day during 5 minutes for 90 days. Opacity (ΔL) and color change (ΔE) of specimens were analyzed with a spectrophotometer (BYK-Gardner) in the different groups in relation to the control group. This handheld portable equipment is unique. RESULTS: Composite resin showed statistically significant difference (p<0.05) in the solutions, and coffee promoted the higher color change, followed by tea and soft drink. There was no difference between specimens sealed or not. CONCLUSIONS: Therefore, surface sealant was inefficient on the protection against color change and coffee promoted the higher darkening of the specimens.
Authors: Gabriela Migliorin da Rosa; Luciana Mendonça da Silva; Márcio de Menezes; Hugo Felipe do Vale; Diego Ferreira Regalado; Danielson Guedes Pontes Journal: Eur J Dent Date: 2016 Apr-Jun