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本文的目的是研究TCu220C的腐蚀和溶解。人口委员会设计了TCu220C,这种节育器以铜套代替铜丝,试图延长有效期。作者收集使用了TCu220C,分两组,一组用于对腐蚀的研究,另一组用于对铜溶解率的估价。随机选择了136例标本,其中85例应用6至158个月,以研究铜套的局部解剖和腐蚀的变化,51例应用6～127个月,计算了铜溶解率。为了测定腐蚀的深度,放大10倍,检查了每一个节育器,并进行记录,例如表面的钙沉淀、铜氧化物及边缘腐蚀情况。每一IUD包埋在塑料外行纵切片,依
The purpose of this paper is to investigate the corrosion and dissolution of TCu220C. The Population Council designed the TCu220C, an IUD that uses copper sleeves instead of copper wires in an effort to extend the life span. The authors collected TCu220C using two groups, one for corrosion studies and the other for copper dissolution rates. A total of 136 specimens were randomly selected, of which 85 were applied for 6 to 158 months to study the local anatomy and erosion of the copper sheath. Fifty-one patients were treated for 6 to 127 months and the copper dissolution rate was calculated. To determine the depth of corrosion, a 10-fold magnification, each of the IUDs was examined and recorded, for example, surface calcium deposits, copper oxides and edge corrosion. Each IUD embedded in the plastic longitudinal line, according to