COLOR STABILITY OF HYBRID IONOMERS AFTER IMMERSION IN STAINS

Purpose: To evaluate the color changes of hybrid ionomers (resin-modif ied glass ionomers) with and without glaze. Materials and Methods: Spe cimens of hybrid ionomer restorative materials were measured at baseli ne and measured again after immersion in five stains (coffee, chlorhex idine, cola, red wine, and water as control) for 72 hours. Color was m easured by CIE La*b* on a reflection spectrophotometer. Results: Wate r produced imperceptible color changes. Coffee and wine produced perce ptible changes in all samples tested. Red wine was particularly damagi ng to Advance. Fuji II LC glaze was effective in resisting discolorati on by chlorhexidine rinse, coffee and wine. Vitremer glaze resisted di scoloration by chlorhexidine rinse. :Hybrid ionomers are susceptible t o discoloration by drinks and rinses. Using glaze as directed by manuf acturer aids in stain resistance.