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A randomized RSA study concentrating especially on continuous migration : A randomized RSA study concentrating especially on continuous migration

Molt, Mats LU ; Ryd, Leif LU and Toksvig-Larsen, Sören LU (2016) In Acta Orthopaedica 87(3). p.262-267
Abstract

Background and purpose — There is a general call for phased introduction of new implants, and one step in the introduction is an early evaluation of micromotion. We compared the micromotion in the Triathlon and its predecessor, the Duracon total knee prosthesis, concentrating especially on continuous migration over 5 years of follow-up. Patients and methods — 60 patients were randomized to receive either a cemented Triathlon total knee prosthesis or a cemented Duracon total knee prosthesis. 3-D tibial component migration was measured by radiostereometric analysis (RSA) at 3 months and at 1, 2, and 5 years. Results — There was no statistically significant difference in maximum total point motion (MTPM) between the 2 groups (p = 0.1). The... (More)

Background and purpose — There is a general call for phased introduction of new implants, and one step in the introduction is an early evaluation of micromotion. We compared the micromotion in the Triathlon and its predecessor, the Duracon total knee prosthesis, concentrating especially on continuous migration over 5 years of follow-up. Patients and methods — 60 patients were randomized to receive either a cemented Triathlon total knee prosthesis or a cemented Duracon total knee prosthesis. 3-D tibial component migration was measured by radiostereometric analysis (RSA) at 3 months and at 1, 2, and 5 years. Results — There was no statistically significant difference in maximum total point motion (MTPM) between the 2 groups (p = 0.1). The mean MTPM at 5 years for the Duracon was 1.10 (SD 1.21) mm and for the Triathlon it was 0.66 (SD 0.38) mm. The numbers of continuously migrating prostheses were similar in the groups at the fifth year of follow-up; 6 of 21 prostheses in the Duracon group and 3 of 21 in the Triathlon group had migrated more than 0.3 mm between the second year and the fifth year of follow-up (p = 0.2). Interpretation — The Triathlon has a micromotion pattern similar to that of the Duracon total knee system at both short-term and medium-term follow-up, and may therefore, over time, show the same good long-term mechanical stability.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Acta Orthopaedica
volume
87
issue
3
pages
262 - 267
publisher
Taylor & Francis
external identifiers
  • scopus:84963860742
ISSN
1745-3674
DOI
10.3109/17453674.2016.1166876
language
English
LU publication?
yes
id
bcb343f5-7dad-49e1-8eb3-58efd32e62ee
date added to LUP
2016-06-22 15:27:41
date last changed
2017-04-09 04:47:02
@article{bcb343f5-7dad-49e1-8eb3-58efd32e62ee,
  abstract     = {<p>Background and purpose — There is a general call for phased introduction of new implants, and one step in the introduction is an early evaluation of micromotion. We compared the micromotion in the Triathlon and its predecessor, the Duracon total knee prosthesis, concentrating especially on continuous migration over 5 years of follow-up. Patients and methods — 60 patients were randomized to receive either a cemented Triathlon total knee prosthesis or a cemented Duracon total knee prosthesis. 3-D tibial component migration was measured by radiostereometric analysis (RSA) at 3 months and at 1, 2, and 5 years. Results — There was no statistically significant difference in maximum total point motion (MTPM) between the 2 groups (p = 0.1). The mean MTPM at 5 years for the Duracon was 1.10 (SD 1.21) mm and for the Triathlon it was 0.66 (SD 0.38) mm. The numbers of continuously migrating prostheses were similar in the groups at the fifth year of follow-up; 6 of 21 prostheses in the Duracon group and 3 of 21 in the Triathlon group had migrated more than 0.3 mm between the second year and the fifth year of follow-up (p = 0.2). Interpretation — The Triathlon has a micromotion pattern similar to that of the Duracon total knee system at both short-term and medium-term follow-up, and may therefore, over time, show the same good long-term mechanical stability.</p>},
  author       = {Molt, Mats and Ryd, Leif and Toksvig-Larsen, Sören},
  issn         = {1745-3674},
  language     = {eng},
  month        = {05},
  number       = {3},
  pages        = {262--267},
  publisher    = {Taylor & Francis},
  series       = {Acta Orthopaedica},
  title        = {A randomized RSA study concentrating especially on continuous migration : A randomized RSA study concentrating especially on continuous migration},
  url          = {http://dx.doi.org/10.3109/17453674.2016.1166876},
  volume       = {87},
  year         = {2016},
}