Mechanical stability of novel highly porous metal acetabular components in revision total hip arthroplasty.
biomechanical · Level V
Where this comes from
- Record sourced from PubMed, PMID 19361948.
- Also identified by DOI 10.1016/j.arth.2009.03.003.
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Abstract
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.
Medical subject headings
- Acetabulum
- Arthroplasty, Replacement, Hip
- Hip Prosthesis
- Materials Testing
- Tantalum
Anatomy
- hip
- pelvis