A comparative study of fluoride uptake from dentin bonding agents and glass-ionomer cements in permanent and primary tooth enamel

Objective: Many fluoride-releasing dental materials are being sold on the b asis of their cariostatic properties. However, the amount of fluoride relea se of these materials is still uncertain. The aim of this study was to dete rmine the amount of fluoride uptake in primary and permanent tooth enamel f rom I conventional glass-ionomer cement (Fuji II), I resin-modified glass-i onomer cement (Fuji II LC), and 2 fluoride-releasing dentin bonding agents (Liner Bond 2 and Optibond) in vitro Method and materials: One hundred sixt y caries-free primary and permanent molar teeth were assigned to the study Materials were applied according to the manufacturer's instructions to stan dard windows created on the enamel surfaces, The amount of fluoride uptake by enamel was investigated by using a specific fluoride electrode and acid- etching biopsy technique. Results: The amount of fluoride taken up from Fuj i II and Fuji II LC by permanent and primary tooth enamel was found to be s tatistically significant. However, no significant fluoride uptake from Opti bond and Liner Bond 2 was found. Conclusion: Fuji II and Fuji II LC glass-i onomer materials seemed to provide more effective fluoride release than did Optibond and Liner Bond 2 in permanent and primary enamel.