Journal article
Component Rotation inWell-Functioning, Gap Balanced Total Knee Arthroplasty Without Navigation
The Journal of arthroplasty, Vol.38(6 Suppl.), pp.S204-S208
06/01/2023
DOI: 10.1016/j.arth.2023.03.033
PMID: 36963529
Abstract
Background: Malalignment of total knee arthroplasty (TKA) components is a potential cause of clinical failure following TKA. Since the goal of a gap balancing (GB) technique is equal flexion and extension gaps secondary to soft-tissue balancing, and not necessarily component alignment, variation in component placement may exist. Our purpose was (1) to evaluate precision of component alignment in well-functioning GB TKAs performed without the aid of navigation using computed tomographic evaluation and (2) to determine any relationship between femoral version and/or tibial torsion and TKA component positioning.
Methods: There were 93 well-functioning TKAs performed with an extension gap first GB technique with a minimum 2-year follow-up evaluated using computed tomography to assess component rotational alignment, as well as osseous femoral version and tibial torsion. Femoral and tibial rotational alignment was assessed by previously described methods.
Results: The mean Knee Society Score was 185.7 +/- 21.7. The mean range of motion was 128.5 +/- 7.8 degrees. Femoral posterocondylar axis (relative to the transepicondylar axis) values ranged from -8.3 to 4.1 degrees with a mean of -0.78 +/- 2.7 degrees (internal rotation). Mean tibial rotation was 17.2 +/- 7.9 degrees internal rotation relative to the tibial tubercle. No correlation was found between native femoral version and femoral component rotational alignment (Pearson's correlation coefficient, r, 0.007). Weak correlation was found between native tibial torsion and tibial component alignment (r = 0.24).
Conclusion: Despite being only a secondary objective with the GB technique, most components evaluated were within the desired range of rotation. Alignment was not influenced by native osseous rotational geometry. Level of Evidence: Level III, Retrospective Cohort Study. (c) 2023 Elsevier Inc. All rights reserved.
Details
- Title: Subtitle
- Component Rotation inWell-Functioning, Gap Balanced Total Knee Arthroplasty Without Navigation
- Creators
- Jacob M. Elkins - University of IowaJason M. Jennings - Colorado Joint ReplacementRoseann M. Johnson - Colorado Joint ReplacementAnna C. Brady - Colorado Joint ReplacementThomas J. Parisi - Orthopedic InstituteDouglas A. Dennis - Colorado Joint Replacement
- Resource Type
- Journal article
- Publication Details
- The Journal of arthroplasty, Vol.38(6 Suppl.), pp.S204-S208
- Publisher
- Elsevier
- DOI
- 10.1016/j.arth.2023.03.033
- PMID
- 36963529
- ISSN
- 0883-5403
- eISSN
- 1532-8406
- Number of pages
- 5
- Language
- English
- Date published
- 06/01/2023
- Academic Unit
- Orthopedics and Rehabilitation
- Record Identifier
- 9984461958402771
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