کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4063567 | 1604060 | 2008 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Surface Damage After Multiple Dislocations of a 38-mm-Diameter, Metal-on-Metal Hip Prosthesis Surface Damage After Multiple Dislocations of a 38-mm-Diameter, Metal-on-Metal Hip Prosthesis](/preview/png/4063567.png)
We present, for the first time, a detailed damage assessment of a large-diameter metal-on-metal (L-MOM) hip prosthesis to show the extent of surface damage that can occur in a patient after multiple dislocations. The patient was a man (51 years old) who dislocated 8 times and was finally revised at 27 months. Radiographically, the cup was malpositioned with 65° lateral opening and 15° retroversion. The retrieved cup was a 1-piece, 38-mm Co-Cr-Mo (M2a; Biomet, Warsaw, Ind) with a titanium-alloy backing. The retrieved components demonstrated all known modes of wear, including a polished wear scar, multidirectional scratching, “stripe” wear, surface contamination of titanium-alloy, front face wear, and backside wear. The clinical significance is that cup positioning remains critical regardless of whether a large diameter head is used or not.
Journal: The Journal of Arthroplasty - Volume 23, Issue 7, October 2008, Pages 1090–1096