TY - JOUR
T1 - Surface Damage After Multiple Dislocations of a 38-mm-Diameter, Metal-on-Metal Hip Prosthesis
AU - Bowsher, John G.
AU - Donaldson, Thomas K.
AU - Williams, Paul A.
AU - Clarke, Ian C.
N1 - J Arthroplasty. 2008 Oct;23(7):1090-6. doi: 10.1016/j.arth.2007.09.007. Epub 2008 Mar 14. Case Reports; Research Support, Non-U.S. Gov't
PY - 2008/10
Y1 - 2008/10
N2 - 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.
AB - 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.
KW - Co-Cr-Mo
KW - dislocation
KW - malpositioning
KW - metal-on-metal hip prosthesis
KW - revision hip arthroplasty
UR - https://www.scopus.com/pages/publications/52049097064
UR - https://www.scopus.com/pages/publications/52049097064#tab=citedBy
U2 - 10.1016/j.arth.2007.09.007
DO - 10.1016/j.arth.2007.09.007
M3 - Article
C2 - 18534503
SN - 0883-5403
VL - 23
SP - 1090
EP - 1096
JO - Journal of Arthroplasty
JF - Journal of Arthroplasty
IS - 7
ER -