질화 지르코늄 코팅이 코발트 크롬 합금과 타이타늄 합금에서 의치상 레진과의 전단결합강도에 미치는 영향
The effect of Zirconium Nitride coating on shear bond strength with denture base resin in Co-Cr alloy and titanium alloy
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목적: 본 연구는 Co-Cr, Ti-6Al-4V 합금에 Zirconium Nitride (이하 ZrN) 적용 시, 의치상 레진과의 접착력을 비교하는 것이다. 연구 재료 및 방법: Co-Cr, Ti-6Al-4V 디스크(직경 10 mm, 두께 2.5 mm)를 각각 14개씩 제작하였고, ZrN 코팅에 따라 2개의 그룹으로 나누었다. Primer로 시편 전처리 후, 의치상 레진(직경 6 mm, 두께 5 mm)을 부착하였다. 표면 측정기를 이용하여 시편의 거칠기를 측정한 후, 만능 시험기를 이용하여 전단결합강도를 측정하였으며, 이원분산분석으로 통계 분석하였다. 시편 표면과 파절 양상을 주사전자현미경을 이용하여 관찰하였다. 결과: ZrN을 코팅한 시편에서 유의하게 높은 표면 거칠기를 나타내었고(P < 0.05), 전단결합강도는 낮았다(P < 0.001). ZrN 코팅 시편에서는 혼합성 파절과 부착성 파절이 함께 나타났다. 결론: Co-Cr, Ti-6Al-4V 합금에서 ZrN 코팅 처리는 의치상 레진과의 결합력을 약화시켰다.
Abstract
Purpose: The purpose of this study was to evaluate of Zirconium Nitride (ZrN) coating on shear bond strength with denture base resin in Co-Cr and Ti-6Al-4V alloy. Materials and Methods: Co-Cr and Ti-6Al-4V alloy disks (10 mm in diameter, 2.5 mm in thickness; each other: n = 14) were prepared and divided with 2 groups each other by ZrN coating. After primer was applied to disks surface, denture base resin with diameter 6 mm, height 5 mm was bonded on metal disk surface. After surface roughness was measured by Profiler, shear bond strength was determined with Universal testing machine and analyzed with two-way ANOVA. The specimen surfaces and failure mode were examined using a scanning electron microscope. Results: ZrN coated groups showed significantly higher rough surface than non-coated groups (P < 0.05). Irrespective of alloy materials, shear bond strength of ZrN coated groups were lower than non-coated groups (P < 0.001). The scanning electron microscope (SEM) of ZrN coated groups showed mixed and adhesive fractures. Conclusion: ZrN coating weakened bonding strength between denture base resin and Co-Cr, Ti-6Al-4V alloy.
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