Effect of Microleakage and Fluoride on Enamel-Dentine Demineralization around Restorations

Author(s)

Cenci, M. S. ^{[1, 2]} ; Tenuta, L. M. A. ^[1] ; Pereira-Cenci, T. ^{[1, 2]} ; Cury, A. A. Del Bel ^[1] ; ten Cate, J. M. ^[2] ; Cury, J. A. ^[1]

Affiliation

^[1] Univ Estadual Campinas, Piracicaba Dent Sch, BR-13414903 Piracicaba, SP - Brazil

^[2] Acad Ctr Dent Amsterdam, NL-1066 EA Amsterdam - Netherlands

• Document type: Journal article
• Source: Caries Research; v. 42, n. 5, p. 369-379, 2008.
• Web of Science Citations: 55

Abstract

There is no consensus about an association between microleakage and secondary caries, especially considering the presence of fluoride (F) at the tooth /restoration interface. Thus, a randomized, double-blind, crossover study was carried out to evaluate in situ the effect of microleakage on caries around enamel-dentine restorations in the presence of F from dental materials or dentifrice, either alone or in combination. In 4 phases of 14 days each, 14 volunteers wore palatal devices containing dental slabs restored with composite resin (CR) or resin-modified glass ionomer cement (GI). Restorations were made without leakage (L-), following the recommended adhesive procedures, or with leakage (L+), in the absence of adhesive procedures. Plaque-like biofilm (PLB) was left to accumulate on the restored slabs, which were exposed extraorally to a 20% sucrose solution 10x/day. The volunteers used a non-F (NF) or an F (FD) dentifrice 3x/day, depending on the experimental phase. No differences were found between L+ or L-restorations (p > 0.05). Higher demineralization in both enamel and dentine around CR restorations was observed under NF (p < 0.05). F concentration was higher in the fluid of PLB exposed to FD or formed onto GI restoration (p < 0.05). These results suggest that while microleakage does not affect caries development, GI or FD may maintain increased F levels in the PLB, thereby decreasing caries progression. Copyright (C) 2008 S. Karger AG, Basel. (AU)