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Göteborgs universitets publikationer

Stable Fixation of a Cementless, Proximally Coated, Double Wedged, Double Tapered Femoral Stem in Total Hip Arthroplasty: A 5-Year Radiostereometric Analysis

Författare och institution:
A. K. Nebergall (-); Ola Rolfson (Institutionen för kliniska vetenskaper, sektionen för anestesi, biomaterial och ortopedi, Avdelningen för ortopedi); H. E. Rubash (-); Henrik Malchau (-); A. Troelsen (-); Meridith E Greene (-)
Publicerad i:
Journal of Arthroplasty, 31 ( 6 ) s. 1267-1274
Artikel, refereegranskad vetenskaplig
Sammanfattning (abstract):
Background: The objective of this 5-year prospective study of 51 hips was to assess migration of a cementless tapered femoral stem using radiostereometric analysis (RSA), plain radiographs (radiolucencies), and patient-reported outcome measures (PROMs). Methods: Forty-seven patients (51 hips) agreed to participate in this prospective RSA study. All patients received a Taperloc stem. Tantalum beads were inserted into the femoral bone surrounding the stem to measure migration using RSA. RSA films, plain radiograph, and PROM follow-up were obtained immediately after surgery, 6 months, 1, 2, 3, and 5 years after surgery. Results: The median (interquartile range) subsidence was 0.03 mm (-0.23 to 0.06) at 5 years, with no significant differences over time. Four outlier stems had >1.5 mm of subsidence by 1 year. No stem showed radiolucencies in more than 3 zones during the 5 years. All PROMs remained favorable at 5 years, suggesting an excellent outcome. There were no stems revised for mechanical loosening; 1 stem was revised for an infection. Conclusion: After initial settling, the cementless tapered femoral stems in our series were stable. The 4 outlier stems with >1.5 mm of subsidence by 1 year remain stable at 5 years. RSA was the most sensitive method of detection for stems at greater risk for potential future failure. This report adds contributions to the positive results associated with this type of fixation. The results at 5 years showed excellent midterm survivorship in this cohort with a cementless tapered femoral component. (C) 2015 Elsevier Inc. All rights reserved.
Ämne (baseras på Högskoleverkets indelning av forskningsämnen):
Klinisk medicin ->
total hip arthroplasty, radiostereometric analysis, patient-reported outcome measures, 10-YEAR FOLLOW-UP, LONG-TERM, PROSTHESES, COMPONENT, FAILURE, SURVIVORSHIP, REPLACEMENTS, REGISTER, MINIMUM, DESIGN
Postens nummer:
Posten skapad:
2016-06-27 10:39

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