Migration pattern of a short uncemented stem with or without collar : a randomised RSA-study with 2 years follow-up
Weber, Erik LU ; Flivik, Carl ; Sundberg, Martin LU
and Flivik, Gunnar
LU
(2021)
In HIP International
31(4).
p.500-506
- Abstract
Background: There is an increasing interest in shorter, proximally loading, uncemented femoral stems. The aim of this study was to evaluate a new short stem type, its design based on a well-proven precursor, but with several new design features to facilitate easier insertion and possible preservation of proximal bone stock. It is available with or without a collar. Methods: The study includes 50 patients with primary osteoarthritis, mean age 59 (range 36–75) years, randomised to receive either the collar-fitted or the collarless stem. The patients underwent repeated radiostereometry (RSA) examinations (0, 0.5, 3, 12, 24 months), conventional radiography and filled out both hip-specific (HOOS) and general health (EQ-5D) questionnaires.... (More)
Background: There is an increasing interest in shorter, proximally loading, uncemented femoral stems. The aim of this study was to evaluate a new short stem type, its design based on a well-proven precursor, but with several new design features to facilitate easier insertion and possible preservation of proximal bone stock. It is available with or without a collar. Methods: The study includes 50 patients with primary osteoarthritis, mean age 59 (range 36–75) years, randomised to receive either the collar-fitted or the collarless stem. The patients underwent repeated radiostereometry (RSA) examinations (0, 0.5, 3, 12, 24 months), conventional radiography and filled out both hip-specific (HOOS) and general health (EQ-5D) questionnaires. Results: There was no statistically significant difference between the collared and collarless stems regarding migration and clinical outcome. Both stem types exhibit a similar pattern of initial subsidence (collared 0.63 mm vs. collarless 0.75 mm [p = 0.50]) and retroversion (collared 0.71° vs. collarless 0.97° [p = 0.36]) up to 3 months followed by stabilisation, in similarity with its precursors, suggesting good osseointegration. No stem has been revised or considered loose. Conclusions: The new design features, including shortening the stem, do not compromise migration pattern or osseointegration, regardless collar or not.
(Less)
- author
- Weber, Erik
LU
; Flivik, Carl
; Sundberg, Martin
LU
and Flivik, Gunnar
LU
- organization
- publishing date
- 2021-07-01
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Furlong, hip stem, postoperative migration, RSA, THA, uncemented
- in
- HIP International
- volume
- 31
- issue
- 4
- pages
- 7 pages
- publisher
- SAGE Publications
- external identifiers
-
- pmid:31793347
- scopus:85077152145
- ISSN
- 1120-7000
- DOI
- 10.1177/1120700019888471
- language
- English
- LU publication?
- yes
- id
- 7ea9dcf4-00c1-48ad-985d-1bb4757d5838
- date added to LUP
- 2020-01-14 14:35:19
- date last changed
- 2024-04-17 02:30:09
@article{7ea9dcf4-00c1-48ad-985d-1bb4757d5838,
abstract = {{<p>Background: There is an increasing interest in shorter, proximally loading, uncemented femoral stems. The aim of this study was to evaluate a new short stem type, its design based on a well-proven precursor, but with several new design features to facilitate easier insertion and possible preservation of proximal bone stock. It is available with or without a collar. Methods: The study includes 50 patients with primary osteoarthritis, mean age 59 (range 36–75) years, randomised to receive either the collar-fitted or the collarless stem. The patients underwent repeated radiostereometry (RSA) examinations (0, 0.5, 3, 12, 24 months), conventional radiography and filled out both hip-specific (HOOS) and general health (EQ-5D) questionnaires. Results: There was no statistically significant difference between the collared and collarless stems regarding migration and clinical outcome. Both stem types exhibit a similar pattern of initial subsidence (collared 0.63 mm vs. collarless 0.75 mm [p = 0.50]) and retroversion (collared 0.71° vs. collarless 0.97° [p = 0.36]) up to 3 months followed by stabilisation, in similarity with its precursors, suggesting good osseointegration. No stem has been revised or considered loose. Conclusions: The new design features, including shortening the stem, do not compromise migration pattern or osseointegration, regardless collar or not.</p>}},
author = {{Weber, Erik and Flivik, Carl and Sundberg, Martin and Flivik, Gunnar}},
issn = {{1120-7000}},
keywords = {{Furlong; hip stem; postoperative migration; RSA; THA; uncemented}},
language = {{eng}},
month = {{07}},
number = {{4}},
pages = {{500--506}},
publisher = {{SAGE Publications}},
series = {{HIP International}},
title = {{Migration pattern of a short uncemented stem with or without collar : a randomised RSA-study with 2 years follow-up}},
url = {{http://dx.doi.org/10.1177/1120700019888471}},
doi = {{10.1177/1120700019888471}},
volume = {{31}},
year = {{2021}},
}