Abstract
The bonding effect of the chelating agent and metallic ion as primer of dental resin cement was examined.The primer was a combined phytic acid and SnF
2 solution(<PYA-SnF
2>primer)that was useful for protection of dental pulp.The effect was evaluated by the shear bond strength of resin cement to sintered hydroxyapatite and bovine dentin.Adhesives used were Panavia EX and Super Bond C&B.The etching agent was phytic acid solution, 40%-phosphoric acid solution and 10%-chitric acid-3%-iron(III)chloride solution, and saturated solution of SnF
2 was used as a source of metallic ion.The treatment with combined phytic and SnF
2 solution improved the bond strength of the adhesion of resin cement to apatite, but it was not clearly for bovine dentin.The application of SnF
2 solution after treatment by<PYF-SnF
2>primer, improved the bond strength and the adhesion.The bond strength was improved by treatment with a higher concentration of phytic acid solution by adhesive of Super Bond to apatite.Bovined dentin was treated for 30 seconds with 3-50% phytic acid solution then with SnF
2 solution applied.The appropriate concentration of phytic acid solution on the bovine dentin was approximately 3%.The difference with the kind of adhesive was small.The duration of the treatment with phytic acid solution or SnF
2 solution had litte effect on the bond strength of resin cement to bovine dentin.The surface of bovine dentin treated with <PYA-SnF
2>primer was the same as that treated with the 10-3 solution, and the<PYA-SnF
2>primer was slightly infringed on hard tissue of tooth.
