TY - JOUR
T1 - Impingement in total hip arthroplasty
T2 - A study of retrieved acetabular components
AU - Shon, Won Yong
AU - Baldini, Todd
AU - Peterson, Margaret G.
AU - Wright, Timothy M.
AU - Salvati, Eduardo A.
PY - 2005/6/1
Y1 - 2005/6/1
N2 - Impingement can damage the acetabular liner, create polyethylene wear, and cause dislocation. We determined the prevalence of impingement, its relation with dislocation, and the influence of patient, surgical, and design factors in 162 components randomly selected from a larger group retrieved between 1990 and 1999. Impingement arc, severity, and wear damage were measured; patient data were obtained from medical records, and component position was determined from radiographs. More than half (56%) showed impingement, including 94% of those removed for dislocation. The occurrence of impingement was significantly increased if the revision diagnosis was dislocation, if the component had a large outer diameter or an elevated rim, and if the femoral component had an extended flanged neck. Implant design, in particular head/neck ratio, can help reduce the prevalence of impingement.
AB - Impingement can damage the acetabular liner, create polyethylene wear, and cause dislocation. We determined the prevalence of impingement, its relation with dislocation, and the influence of patient, surgical, and design factors in 162 components randomly selected from a larger group retrieved between 1990 and 1999. Impingement arc, severity, and wear damage were measured; patient data were obtained from medical records, and component position was determined from radiographs. More than half (56%) showed impingement, including 94% of those removed for dislocation. The occurrence of impingement was significantly increased if the revision diagnosis was dislocation, if the component had a large outer diameter or an elevated rim, and if the femoral component had an extended flanged neck. Implant design, in particular head/neck ratio, can help reduce the prevalence of impingement.
KW - Acetabular component
KW - Dislocation
KW - Impingement
KW - Retrieval analysis
KW - Total hip replacement
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U2 - 10.1016/j.arth.2004.09.058
DO - 10.1016/j.arth.2004.09.058
M3 - Article
C2 - 16124957
AN - SCOPUS:20444399895
SN - 0883-5403
VL - 20
SP - 427
EP - 435
JO - Journal of Arthroplasty
JF - Journal of Arthroplasty
IS - 4
ER -