Design modifications of the uncemented Furlong hip stem result in minor early subsidence but do not affect further stability.
Weber, Erik LU ; Sundberg, Martin LU
and Flivik, Gunnar
LU
(2014)
In Acta Orthopaedica
85(6).
p.556-561
- Abstract
- Background and purpose - Even small design modifications of uncemented hip stems may alter the postoperative 3-D migration pattern. The Furlong Active is an uncemented femoral stem which, in terms of design, is based on its precursor-the well-proven Furlong HAC-but has undergone several design changes. The collar has been removed on the Active stem along with the lateral fin; it is shorter and has more rounded edges in the proximal part. We compared the migration patterns of the uncemented Furlong HAC stem and the modified Furlong Active stem in a randomized, controlled trial over 5 years using radiostereometry (RSA). Patients and methods - 50 patients with primary osteoarthritis were randomized to receive either the HAC stem or the Active... (More)
- Background and purpose - Even small design modifications of uncemented hip stems may alter the postoperative 3-D migration pattern. The Furlong Active is an uncemented femoral stem which, in terms of design, is based on its precursor-the well-proven Furlong HAC-but has undergone several design changes. The collar has been removed on the Active stem along with the lateral fin; it is shorter and has more rounded edges in the proximal part. We compared the migration patterns of the uncemented Furlong HAC stem and the modified Furlong Active stem in a randomized, controlled trial over 5 years using radiostereometry (RSA). Patients and methods - 50 patients with primary osteoarthritis were randomized to receive either the HAC stem or the Active stem. The patients underwent repeated RSA examinations (postoperatively, at 3 months, and after 1, 2, and 5 years) and conventional radiography, and they also filled out hip-specific questionnaires. Results - During the first 3 months, the collarless Active stem subsided to a greater extent than the collar-fitted HAC stem (0.99 mm vs. 0.31 mm, p = 0.05). There were, however, no other differences in movement measured by RSA or in clinical outcome between the 2 stems. After 3 months, both stem types had stabilized and almost no further migration was seen. Interpretation - The Active stem showed no signs of unfavorable migration. Our results suggest that the osseointegration is not compromised by the new design features. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/4692797
- author
- Weber, Erik
LU
; Sundberg, Martin
LU
and Flivik, Gunnar
LU
- organization
- publishing date
- 2014
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Acta Orthopaedica
- volume
- 85
- issue
- 6
- pages
- 556 - 561
- publisher
- Taylor & Francis
- external identifiers
-
- pmid:25175668
- wos:000345347600003
- scopus:84911113356
- pmid:25175668
- ISSN
- 1745-3682
- DOI
- 10.3109/17453674.2014.958810
- language
- English
- LU publication?
- yes
- id
- c2c9ff6b-7a92-48a1-988f-322e2faa5473 (old id 4692797)
- alternative location
- http://www.ncbi.nlm.nih.gov/pubmed/25175668?dopt=Abstract
- date added to LUP
- 2016-04-01 09:54:25
- date last changed
- 2022-01-25 17:47:18
@article{c2c9ff6b-7a92-48a1-988f-322e2faa5473,
abstract = {{Background and purpose - Even small design modifications of uncemented hip stems may alter the postoperative 3-D migration pattern. The Furlong Active is an uncemented femoral stem which, in terms of design, is based on its precursor-the well-proven Furlong HAC-but has undergone several design changes. The collar has been removed on the Active stem along with the lateral fin; it is shorter and has more rounded edges in the proximal part. We compared the migration patterns of the uncemented Furlong HAC stem and the modified Furlong Active stem in a randomized, controlled trial over 5 years using radiostereometry (RSA). Patients and methods - 50 patients with primary osteoarthritis were randomized to receive either the HAC stem or the Active stem. The patients underwent repeated RSA examinations (postoperatively, at 3 months, and after 1, 2, and 5 years) and conventional radiography, and they also filled out hip-specific questionnaires. Results - During the first 3 months, the collarless Active stem subsided to a greater extent than the collar-fitted HAC stem (0.99 mm vs. 0.31 mm, p = 0.05). There were, however, no other differences in movement measured by RSA or in clinical outcome between the 2 stems. After 3 months, both stem types had stabilized and almost no further migration was seen. Interpretation - The Active stem showed no signs of unfavorable migration. Our results suggest that the osseointegration is not compromised by the new design features.}},
author = {{Weber, Erik and Sundberg, Martin and Flivik, Gunnar}},
issn = {{1745-3682}},
language = {{eng}},
number = {{6}},
pages = {{556--561}},
publisher = {{Taylor & Francis}},
series = {{Acta Orthopaedica}},
title = {{Design modifications of the uncemented Furlong hip stem result in minor early subsidence but do not affect further stability.}},
url = {{http://dx.doi.org/10.3109/17453674.2014.958810}},
doi = {{10.3109/17453674.2014.958810}},
volume = {{85}},
year = {{2014}},
}