umu.sePublications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Mid-term migration of a cementless, porous acetabular cup: A 5 year Radiostereometric analysis
Umeå University, Faculty of Medicine, Department of Surgical and Perioperative Sciences, Orthopaedics. Umeå University Hospital, S-901 85 Umeå, Sweden.
Show others and affiliations
2017 (English)In: Journal of Orthopaedics, ISSN 0972-978X, E-ISSN 0972-978X, Vol. 14, no 4, p. 454-460Article in journal (Refereed) Published
Abstract [en]

Purpose: The aim of the study was to determine the 5 year migratory and wear patterns, adverse events and clinical outcomes of a cementless, porous acetabular cup. Methods: RSA imaging of a cohort of 11 patients was retrospective analysed at 5 years post Total Hip Arthroplasty (THA). Changes in pain, function and symptoms of the hip at 5 years post-THA were compared to preoperative and 2 year postoperative assessments on the Harris Hip Score (HHS) and Hip dysfunction and Osteoarthritis Outcome Score (HOOS). Results: The majority of cup migration occurred up to 6 months and stabilised thereafter (6 months to 5 years, p = 0.091-0.866, Wilcoxon Signed Rank test). The direction of rotation around the 3 axes was evenly distributed among the cups between anterior-posterior rotation, internal-external rotation and increased-decreased inclination. The majority of the cups translated proximally, at an average migration of 0.36 mm (+/- 95% CI 0.17) at 5-years post-THA. Following initial bedding in, up to 6 months, there was no detectable polyethylene wear between 6 months and 5 years. At 5 years postoperatively, a statistically significant difference was observed across all HOOS subscales in comparison to preoperative values, with higher means reported at 5 years (p < 0.001). The total mean HHS displayed a statistically significant improvement, increasing from 'poor' preoperatively to 'good' at 5 years post-THA. Conclusion: Following initial migration between discharge and 6 months, the cementless porous acetabular cup demonstrated a tendency for stabilisation from 6 months up to 5 years post-THA, suggesting good mid-term fixation. Additionally, improvements in clinical outcome measures of pain, function and quality-of-life remained high following THA at 5 years post-surgery. 

Place, publisher, year, edition, pages
Elsevier, 2017. Vol. 14, no 4, p. 454-460
Keywords [en]
Acetabular cup, Migration, Radiostereometric analysis, RSA, Total Hip Arthroplasty, THA
National Category
Orthopaedics
Identifiers
URN: urn:nbn:se:umu:diva-143649DOI: 10.1016/j.jor.2017.07.004ISI: 000418482800008PubMedID: 28819343OAI: oai:DiVA.org:umu-143649DiVA, id: diva2:1171919
Available from: 2018-01-08 Created: 2018-01-08 Last updated: 2018-06-09Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full textPubMed

Authority records BETA

Nilsson, Kjell G.Quinn, Stephen J.

Search in DiVA

By author/editor
Nilsson, Kjell G.Quinn, Stephen J.
By organisation
Orthopaedics
In the same journal
Journal of Orthopaedics
Orthopaedics

Search outside of DiVA

GoogleGoogle Scholar

doi
pubmed
urn-nbn

Altmetric score

doi
pubmed
urn-nbn
Total: 7 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf