TY - JOUR
T1 - Mechanical stability of novel highly porous metal acetabular components in revision total hip arthroplasty
AU - Meneghini, R. Michael
AU - Meyer, Christopher
AU - Buckley, Christine A.
AU - Hanssen, Arlen D.
AU - Lewallen, David G.
PY - 2010/4
Y1 - 2010/4
N2 - Highly porous metal acetabular components have emerged for revision hip arthroplasty. However, superior mechanical stability over traditional cementless components has not been demonstrated. Three different cementless acetabular components, including 2 highly porous tantalum designs, were inserted into hemipelvis specimens with a superolateral defect. Mechanical testing was performed to failure using a servohydraulic testing machine. The porous tantalum designs exhibited superior stability over the traditional cementless implant (P < .05). There was no difference in mechanical stability between the rigid modular tantalum shell and the more flexible revision tantalum shell (P > .46). In acetabular revision, highly porous tantalum acetabular components provide superior mechanical stability. However, these results suggest that improved frictional resistance is a more important design feature over implant flexibility with this particular implant.
AB - Highly porous metal acetabular components have emerged for revision hip arthroplasty. However, superior mechanical stability over traditional cementless components has not been demonstrated. Three different cementless acetabular components, including 2 highly porous tantalum designs, were inserted into hemipelvis specimens with a superolateral defect. Mechanical testing was performed to failure using a servohydraulic testing machine. The porous tantalum designs exhibited superior stability over the traditional cementless implant (P < .05). There was no difference in mechanical stability between the rigid modular tantalum shell and the more flexible revision tantalum shell (P > .46). In acetabular revision, highly porous tantalum acetabular components provide superior mechanical stability. However, these results suggest that improved frictional resistance is a more important design feature over implant flexibility with this particular implant.
KW - Acetabulum
KW - Fixation
KW - Mechanical stability
KW - Porous tantalum
KW - Revision hip arthroplasty
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U2 - 10.1016/j.arth.2009.03.003
DO - 10.1016/j.arth.2009.03.003
M3 - Article
C2 - 19361948
AN - SCOPUS:77950516613
SN - 0883-5403
VL - 25
SP - 337
EP - 341
JO - Journal of Arthroplasty
JF - Journal of Arthroplasty
IS - 3
ER -