1 試作タンニン酸誘導体を用いた象牙質接着システムの接着性能と抗菌効果について (第444回 大阪歯科学会例会)

抄録

I determined the effect of the use of three experimental tannic derivatives (TAD) as primers on the adhesion of composite resin (CR) to dentin by measuring the tensile bond strength (TBS) between CR and bovine dentin treated with phosphoric acid, and examined the antibacterial activity of TAD. Application of TAD dissolved in 70% ethanol before or after phosphoric acid treatment resulted in greater TBS than when TAD was not applied. TAD showed antibacterial activity against the oral streptococci, Escherichia coli and Staphylococcus aureus when tested by three bacteriological methods. SEM revealed that bacterial cells collapsed when treated with TAD. These results suggest that TAD interfered with the creation of the layer weakened by phosphoric acid treatment, and reinforced the exposed dentinal collagen. Furthermore, the antibacterial activity of TAD seemed to inhibit secondary caries and aid in pulpal protection.