타이타니움 의치상에 대한 다양한 금속표면처리제의 적용이 첨상레진과의 결합강도에 미치는 영향

The Effects of Various Metal Surface Treatments on the Shear Bond Strength between Titanium Denture Base and Relined Resins

The purpose of this study was to evaluate the effect of various metal surface treatments on the shear bond strength between titanium denture base and relined resins. The surfaces of commercially pure(cp) titanium were sandblasted with $50{\mu}m$ $Al_2O_3$ for 20 seconds and each group was treated with MR $Bond^{(R)}$, Alloy $Primer^{(R)}$, and Super-Bond $C&B^{(R)}$ accordingly. The specimens were completed by application of relining resins. The specimens were stored in room temperature. And the shear bond strength of the specimens were measured with the MTS universal testing $machine^{(R)}$. The results were as follows: 1. In comparison with the relining materials, $Kooliner^{(R)}$ groups showed statistically higher shear bond strength than Tokuyama Rebase $II^{(R)}$ groups(p<0.05). 2. Comparing shear bond strength, according to surface treatment, Super-bond $C&B^{(R)}$ groups showed the highest bond strength and were significantly higher than the other three groups(p<0.05). Alloy $Primer^{(R)}$ groups showed no significant difference with the MR $Bond^{(R)}$ groups, but was significantly higher than the sandblasting-only groups(p<0.05). 3. Comparing surface treatment in each groups, for two types of relining resin, the group which applies $Kooliner^{(R)}$ and Super-bond $C&B^{(R)}$ showed the highest bond strength and showed significant difference compared to the other groups(p<0.05). When using Tokuyama Rebase $II^{(R)}$, Super-bond C&B group showed the highest bond strength, but there were no significant difference compared to the Alloy $Primer^{(R)}$ group. In this limited study, applying $Kooliner^{(R)}$ and Super-Bond $C&B^{(R)}$ after sandblasting is considered to be advantageous for relining of titanium base dentures.