摘要
目的:研究分析氟离子环境对经烤瓷工序处理后金属耐腐蚀性能的影响。方法:制作金(Au)合金、纯钛(Ti)、钴铬(CoCr)合金、镍铬(NiCr)合金试件各6件,模拟临床烤瓷处理后分别置于人工唾液(A组),含有0.2% NaF的人工唾液中(B组),绘制极化曲线,获得并分析材料的自腐蚀电位和腐蚀电流密度。结果:B组与A组比较,镍铬合金、钴铬合金、纯钛自腐蚀电位负值增大,差异有统计学意义(P<0.05),金合金无差异。同种金属B组与A组相比腐蚀电流密度增加,差异有统计学意义(P<0.05)。结论:氟离子环境能使得烤瓷处理过金属的耐腐蚀性能下降,腐蚀速度加快。金合金与纯钛耐腐蚀性能较强,其次是CoCr合金,NiCr合金最差。
Objective：To study the effects of the fluorine ion environment on metal corrosion resistance after porcelain-fused-to-metal crown（ PFM） process treatment.Methods：Specimens of gold （ Au） alloy,pure titanium （ Ti） ,cobalt chromium （ CoCr） alloy,nickel chromium（ NiCr） alloy,6 pieces each,were respectively produced.Processed by simulated clinical PFM in plain artificial saliva （ group A） ,and in artificial saliva which contained 0.2% NaF （ group B） .Thereby polarization curve could be drawn,and results of the corrosion potential （ Ecorr） and the corrosion current density （ Icorr） of the materials were acquired.Results：By comparison between group B and group A,the corrosion potential negative values of nickel chromium alloy and co-cr alloy,and pure titanium increased,and the difference was statistically significant （ P 0.05） .But that of the gold alloy had no statistic difference.Between the same metal of group B and group A,the corrosion current density increased,and the difference was statistically significant （ P 0.05） .Conclusions：Fluoride ions in the environment make the PFM processed metal corrosion resistance decreased,and the corrosion rate accelerated.Among all the alloys tested gold alloy and pure titanium have the strongest corrosion resistance,CoCr alloy comes the second,but NiCr alloy is the poorest.
出处
《口腔生物医学》
2013年第2期87-90,共4页
Oral Biomedicine
基金
江苏省高校优势学科建设工程资助项目
关键词
氟离子
烤瓷熔附金属
腐蚀
极化曲线
Fluoride ion
Porcelain-fused-to-metal
Corrosion
Polarization curve
