The influence of storage solution on dentin bond durability of resin cement.
OBJECTIVE
This study was conducted to determine the influence of storage solution on the bond durability of three resin cements to bovine dentin over the period of 1 year.


METHODS
Ten bovine dentin specimens were tested for shear bond strength with each material (Panavia 21, Kuraray Co.; BISTITE, Tokuyama Co; MASA Bond, Sun Medical Co.) and storage mode, listed below. Four storage environments were studied as follows: water changed every day for 1 year; water unchanged for 1 year; Phosphate Buffered Saline (PBS) changed every week over 1 year; PBS unchanged for 1 year. Ten teeth were also tested for each material at 1 day as a control. The mode of failure was classified after fracture of the bonds by SEM observation. The means of the bond strengths were compared statistically by two-way ANOVA and Fisher's PLSD test (p < 0.05). Results for the mode of fracture were analyzed using the Mann-Whitney U test.


RESULTS
Although there was no statistical difference in the mean bond strengths between the water and PBS storage solutions (p > 0.05) in all cements, the results for the shear bond strengths in the changed storage solution groups were significantly lower than those where the storage solution remained unchanged (p < 0.05). There were statistical differences between the 1 day results and the changed water groups among all cements (p < 0.05).


CONCLUSIONS
The storage condition influenced the long-term durability of dentin bonding with resin cements.
Kitasako
Y
Y
Department of Operative Dentistry, Faculty of Dentistry, Tokyo Medical and Dental University, Tokyo, Japan. y.kitasako.odnt@dent.tmd.ac.jp
Burrow
M F
MF
Nikaido
T
T
Tagami
J
J
D000268:Adhesiveness; D000704:Analysis of Variance; D000818:Animals; D002417:Cattle; D001840:Dental Bonding; D017220:Dentin-Bonding Agents / Q000737:chemistry*; D004356:Drug Storage; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D019279:Resin Cements / Q000737:chemistry*; D012965:Sodium Chloride; D012996:Solutions / Q000737:chemistry; D018709:Statistics, Nonparametric; D013718:Tensile Strength; D014867:Water
D017220:Dentin-Bonding Agents; D019279:Resin Cements; D012996:Solutions; D014867:Water; D012965:Sodium Chloride