Effect of temporary materials on bond strength of resin-modified glass-ionomer luting cements to teeth.
OBJECTIVE
To evaluate the effect of temporary materials on the bond strength of resin-modified glass-ionomer luting cements to teeth.


METHODS
240 freshly extracted bovine central incisors were ground to expose enamel and dentin surface. Fuji Lute and Vitremer Luting Cement were bonded to enamel and dentin surfaces after pretreatment for 1 week with (1) a eugenol-containing cement (Propac), (2) a eugenol-free cement (Freegenol Temporary Pack), (3) a polycarboxylate cement (HY-Bond Temporary Cement Hard), (4) a chemically cured temporary restorative resin (Plast Seal), and (5) a light-cured temporary restorative resin (Fermit). The flattened enamel and dentin surfaces were used as controls. After bonded specimens were stored in water at 37 degrees C for 24 hrs, the tensile bond strength was measured at a crosshead speed of 0.5 mm/min. The data were statistically analyzed by one-way ANOVA and Dunnett's Post-hoc Procedure (P < 0.05).


RESULTS
Plast Seal had no adverse effect on the tensile bond strength of Fuji Lute on both enamel and dentin surfaces, while the other temporary materials revealed significant decrease in bond strength. In Vitremer Luting Cement, Propac, and Fermit, as well as Plast Seal demonstrated tensile bond strengths similar to the controls.
Terata
R
R
Department of Operative Dentistry and Endodontics, School of Dentistry, Iwate Medical University, Morioka, Japan. rterata@iwate-med.ac.jp
Nakashima
K
K
Kubota
M
M
D000704:Analysis of Variance; D000818:Animals; D002417:Cattle; D003188:Composite Resins / Q000737:chemistry; D001840:Dental Bonding; D003738:Dental Cements / Q000737:chemistry*; D003743:Dental Enamel / Q000648:ultrastructure; D003804:Dentin / Q000648:ultrastructure; D005054:Eugenol / Q000737:chemistry; D005899:Glass Ionomer Cements / Q000737:chemistry*; D007180:Incisor; D008689:Methacrylates / Q000737:chemistry; D011076:Polycarboxylate Cement / Q000737:chemistry; D011109:Polymethacrylic Acids / Q000737:chemistry; D019279:Resin Cements / Q000737:chemistry*; D013223:Statistics as Topic; D013314:Stress, Mechanical; D013696:Temperature; D013718:Tensile Strength; D013997:Time Factors; D014867:Water
D003188:Composite Resins; D003738:Dental Cements; C072654:Fermit; C078077:Freegenol; D005899:Glass Ionomer Cements; D008689:Methacrylates; C102650:Plast Seal; D011076:Polycarboxylate Cement; D011109:Polymethacrylic Acids; D019279:Resin Cements; C084550:Vitremer; D014867:Water; C084541:Fuji glass-ionomer lining cement; D005054:Eugenol