Effects of the addition of fluoride to a 4-META/MMA-TBB-based resin adhesive on fluoride release, acid resistance of enamel and shear bond strength in vitro.
This study investigated fluoride release, acid resistance and shear bond strength (SBS) of new 4-META/MMA-TBB-based fluoride-containing resin adhesive (Super-Bond/F3). Super-Bond, Transbond Plus and Fuji Ortho LC were selected for comparison. Fluoride release into distilled water during 6-month period was measured using disk-shaped specimens. Brackets were bonded to human premolars with each material and then the specimens for the nanoindentation test were subjected to alternating immersion (demineralizing and remineralizing solutions); the hardness and elastic modulus of the enamel around bracket were determined. Rest of the specimens was subjected to examine the SBS. Super-Bond/F3 and Fuji Ortho LC showed significantly greater fluoride release compared with the other materials. The reductions in hardness and the elastic modulus for Super-Bond/F3 and Fuji Ortho LC were lower than those for the other materilas. Super-Bond and Super-Bond/F3 showed significantly greater SBS than Fuji Ortho FC. In conclusion, Super-Bond/F3 showed high fluoride-release, cariostatic potential and equivalent SBS.
Division of Orthodontics and Dentofacial Orthopedics, Department of Oral Growth and Development, School of Dentistry, Health Sciences University of Hokkaido, Ishikari-Tobetsu, Hokkaido, Japan. iijima@hoku-iryo-u.ac.jp
Masahiro
M
Iijima
Shuichi
S
Ito
Susumu
S
Nakagaki
Takeshi
T
Muguruma
Naohisa
N
Kohda
Takashi
T
Saito
Itaru
I
Mizoguchi
D000704:Analysis of Variance; D003743:Dental Enamel / Q000737:chemistry*; D003799:Dental Stress Analysis; D055119:Elastic Modulus; D005459:Fluorides / Q000737:chemistry / Q000494:pharmacology; D006244:Hardness; D006801:Humans; D019279:Resin Cements / Q000737:chemistry*; D033081:Shear Strength; D018709:Statistics, Nonparametric; D017001:Tooth Demineralization / Q000139:chemically induced / Q000517:prevention & control*
D019279:Resin Cements; D005459:Fluorides