Resumo

BRAGA, Sheila Regina Maia; GARONE NETTO, Narciso; SOLER, Júlia Maria Pavan  e  SOBRAL, Maria Angela Pita. Degradation of the restorative materials used in non-carious cervical lesions. RGO, Rev. gaúch. odontol. (Online) [online]. 2010, vol.58, n.4, pp. 431-436. ISSN 1981-8637.

OBJECTIVE: Evaluate the effect of acidic beverages and brushing on the restorative materials used in non-carious cervical lesions. METHODS: Three composite resins, one compomer and one resin-modified glass ionomer were tested. Five specimens of each material were immersed in each of the test solutions (orange juice, Coca-Cola, whisky and distilled water) for a 10-day period at 37ºC. Next, the specimens were brushed (20000 cycles with a load of 200g). Weight and surface roughness were measured before and after immersion and brushing. The data were analyzed by ANOVA/Tukey Test (p<0.05). RESULTS: The compomer and resin-modified glass ionomer lost significantly more weight after immersion in orange juice and Coca-Cola followed by brushing than the composite resins. The resin-modified glass-ionomer presented the highest increase in surface roughness after orange juice immersion and brushing. CONCLUSION: Immersion in acidic beverages followed by brushing degraded the restorative materials tested, causing loss of material and increased surface roughness.

Palavras-chave : Tooth abrasion; Glass ionomer cements; Compomers; Tooth erosion; Composite resins.