In vitro investigation of the adhesive strength of cyanoacrylate bonds to human hard tooth structures

Abstract Three different cyanoacrylate monomers were studied as adhesives for hard tooth structures. Flat plane non‐retentive surfaces of extracted human teeth and cold‐curing acrylic onlays were used as the adherends. Both tensile and shear adhesive strengths were investigated under wet and dry conditions at room temperature. The commonly used zinc phosphate dental cement was the control material. Under all test conditions the cyanoacrylates were shown to have greater adhesive strength than the dental cement. The MBR‐4197 (β,β,β trifluoroisopropyl 2‐cyanoacrylate) polymer showed the greatest bonding strength to hard tooth structures. The adhesive strengths of all cyanoacrylate polymers decreased considerably after water immersion but the control dental cement material showed no adhesive strength under the same condition. However, the results of the experimental monomers when compared to the control cement, should encourage further investigations of these monomers for use as dental adhesives.