Influence of marker-selection method in radiostereometric analysis of total knee arthroplasty on tibial baseplate migration patterns : a secondary analysis of a randomized controlled trial with 5-year follow-up
(2024) In Acta Orthopaedica 95. p.157-165- Abstract
Background and purpose — Different marker-selection methods are applied to represent implant and tibial seg-ments in radiostereometric analysis (RSA) studies of total knee arthroplasty (TKA). Either a consistent set of markers throughout subsequent RSA examinations (“consistent-marker method”) is used or all available markers at each follow-up (“all-marker method”). The aim of this secondary analysis was to compare marker-selection methods on individual and group level TKA migration results. Methods — Data from a randomized RSA study with 72 patients was included. Tibial baseplate migration was evalu-ated at 3 months, 1, 2, and 5 years postoperatively with both marker-selection methods. Additionally, migration was calculated using 5... (More)
Background and purpose — Different marker-selection methods are applied to represent implant and tibial seg-ments in radiostereometric analysis (RSA) studies of total knee arthroplasty (TKA). Either a consistent set of markers throughout subsequent RSA examinations (“consistent-marker method”) is used or all available markers at each follow-up (“all-marker method”). The aim of this secondary analysis was to compare marker-selection methods on individual and group level TKA migration results. Methods — Data from a randomized RSA study with 72 patients was included. Tibial baseplate migration was evalu-ated at 3 months, 1, 2, and 5 years postoperatively with both marker-selection methods. Additionally, migration was calculated using 5 fictive points, either plotted based on the consistent set of markers or all available markers. Results — Migration could be calculated with both marker-selection methods for 248 examinations. The same prosthesis and bone markers (n = 136), different prosthesis markers (n = 71), different bone markers (n = 21), or different prosthesis and bone markers (n = 20) were used. The mean difference in maximum total point motion (MTPM) between all examinations was 0.02 mm, 95% confidence interval –0.26 to 0.31 mm. 5 implants were classified as continuously migrating with the consistent-marker method versus 6 implants (same 5 plus one additional implant) with the all-marker method. Using fictive points, fewer implants were classified as continuously migrating in both marker-selection methods. Differences between TKA groups in mean MTPM were comparable with both marker-selection methods, also when fictive points were used. Conclusion — Estimated group differences in mean MTPM were similar between marker-selection methods, but individual migration results differed. The latter has implications when classifying implants for estimated risk of future loosening.
(Less)
- author
- VAN DER LELIJ, Thies J.N. ; Koster, Lennard A. ; MARANG-VAN DE MHEEN, Perla J. ; Toksvig-Larsen, Sören LU ; Nelissen, Rob G.H.H. and Kaptein, Bart L.
- organization
- publishing date
- 2024
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Acta Orthopaedica
- volume
- 95
- pages
- 9 pages
- publisher
- Taylor & Francis
- external identifiers
-
- scopus:85188892613
- pmid:38597226
- ISSN
- 1745-3674
- DOI
- 10.2340/17453674.2024.40184
- language
- English
- LU publication?
- yes
- id
- b5884745-41ec-4eb1-820e-53195d430e27
- date added to LUP
- 2024-04-19 09:38:27
- date last changed
- 2024-06-14 14:52:41
@article{b5884745-41ec-4eb1-820e-53195d430e27,
abstract = {{<p>Background and purpose — Different marker-selection methods are applied to represent implant and tibial seg-ments in radiostereometric analysis (RSA) studies of total knee arthroplasty (TKA). Either a consistent set of markers throughout subsequent RSA examinations (“consistent-marker method”) is used or all available markers at each follow-up (“all-marker method”). The aim of this secondary analysis was to compare marker-selection methods on individual and group level TKA migration results. Methods — Data from a randomized RSA study with 72 patients was included. Tibial baseplate migration was evalu-ated at 3 months, 1, 2, and 5 years postoperatively with both marker-selection methods. Additionally, migration was calculated using 5 fictive points, either plotted based on the consistent set of markers or all available markers. Results — Migration could be calculated with both marker-selection methods for 248 examinations. The same prosthesis and bone markers (n = 136), different prosthesis markers (n = 71), different bone markers (n = 21), or different prosthesis and bone markers (n = 20) were used. The mean difference in maximum total point motion (MTPM) between all examinations was 0.02 mm, 95% confidence interval –0.26 to 0.31 mm. 5 implants were classified as continuously migrating with the consistent-marker method versus 6 implants (same 5 plus one additional implant) with the all-marker method. Using fictive points, fewer implants were classified as continuously migrating in both marker-selection methods. Differences between TKA groups in mean MTPM were comparable with both marker-selection methods, also when fictive points were used. Conclusion — Estimated group differences in mean MTPM were similar between marker-selection methods, but individual migration results differed. The latter has implications when classifying implants for estimated risk of future loosening.</p>}},
author = {{VAN DER LELIJ, Thies J.N. and Koster, Lennard A. and MARANG-VAN DE MHEEN, Perla J. and Toksvig-Larsen, Sören and Nelissen, Rob G.H.H. and Kaptein, Bart L.}},
issn = {{1745-3674}},
language = {{eng}},
pages = {{157--165}},
publisher = {{Taylor & Francis}},
series = {{Acta Orthopaedica}},
title = {{Influence of marker-selection method in radiostereometric analysis of total knee arthroplasty on tibial baseplate migration patterns : a secondary analysis of a randomized controlled trial with 5-year follow-up}},
url = {{http://dx.doi.org/10.2340/17453674.2024.40184}},
doi = {{10.2340/17453674.2024.40184}},
volume = {{95}},
year = {{2024}},
}