engleski

The Impact of Fissure Depth and Enamel Conditioning Protocols on Glass-ionomer and Resin-based Fissure Sealant Penetration

Purpose: To evaluate the effect that fissure depth and enamel conditioning protocols have on penetration abilities of resin- based and glass-ionomer fissure sealants. Materials and Methods: Fifty extracted human molars were randomized into 10 experimental groups. Conditioning was performed as follows: groups I and VI, no pretreatment ; groups II and VII, 10% polyacrylic acid and 37% phosphoric acid, respectively ; groups III and VIII, self-etching adhesive ; groups IV and IX, Er:YAG laser ; groups V and X, Er:YAG laser/10% polyacrylic acid and laser/37% phosphoric acid, respectively. In groups I to V, teeth were sealed with a glass- ionomer material, and in groups VI to X a resin-based sealant was used. The sealed teeth were sectioned and the penetration ability was evaluated using scanning electron microscopy (SEM). Results: Pretreatment with a suitable acid resulted in superior penetration of glass-ionomer and resin-based sealant when compared with other conditioning protocols (p < 0.0001), except for the teeth treated with both Er:YAG laser and acid. Both conditioning protocol and fissure depth significantly affected the sealant penetration (p < 0.0001), but fissure depth had a greater impact on fissure penetration than did conditioning protocol. Conclusion: Resin-based and glass- ionomer sealing materials show similar potential for pit-and- fissure penetration. Penetration of a fissure sealant is largely influenced by the fissure depth. Regarding the conditioning protocol, a pretreatment with a suitable acid is essential to obtain an adequate penetration of a sealing material.

fissure sealant; unground enamel; conventional adhesive system; self-etching adhesive system; fissure morphology; glass ionomer; resin composites

nije evidentirano