Fundamental Study on the Coating Ability of Cyanoacrylate Adhesives to Hydroxyapatite Pellet and Surface of Extracted Teeth

Abstract

Cyanoacrylate adhesive is used worldwide as instant glue because of their one-drop-curing properties. Medical cyanoacrylate adhesive exhibits high adhering strength; its safety for use has been established from its clinical application, use in the living body, and oral use. A hydroxyapatite pellet (HAP) coated with cyanoacrylate adhesive was left in pH 4.0 phthalate standard solution and the concentration of eluted calcium ion was measured. The concentration of eluted calcium ion were 0.4 mM (HAP coated with a cyanoacrylate adhesive) and 6.2 mM (control study of HAP), respectively. This result indicates that the coating with a cyanoacrylate adhesive can inhibit the elution of HAP even in acidic conditions. Cyanoacrylate adhesive was applied to the extracted teeth in the presence of artificial saliva, and the thickness of the adhered area was observed. The thickness of the cyanoacrylate adhesive adhered to the extracted tooth has slightly decreased until the 5th day. The thickness has hardly changed until the 31st. This result shows that the cyanoacrylate adhesive was not removed from the tooth surface in the presence of artificial saliva.