کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1474863 | 991103 | 2012 | 11 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Severe damage of alumina-on-alumina hip implants: Wear assessments at a microscopic level Severe damage of alumina-on-alumina hip implants: Wear assessments at a microscopic level](/preview/png/1474863.png)
Six retrieved alumina hip implants were investigated for severe damage after a mean follow-up of 13 years (range: 8–21 years) using a multivariable approach: a coordinate measuring machine was used to quantify volumetric wear, the surface was characterized by scanning electron microscopy, and fluorescence and Raman spectroscopy were used to investigate the phenomenon on a micrometer crystal scale.All the femoral heads exhibited significant loss of roundness with heavy deviation from the original sphericity, showing an average volumetric wear of 602 ± 3 mm3. A smooth surface with occasional pits and agglomerates was observed; formation of craters and loss of surface integrity was revealed.The femoral heads characterized by the highest volumetric wear underwent the most significant stress on a micrometer crystal scale (i.e. the most pronounced changes in the width of the fluorescence and Raman bands).
Journal: Journal of the European Ceramic Society - Volume 32, Issue 14, November 2012, Pages 3647–3657