Issue |
SICOT-J
Volume 9, 2023
|
|
---|---|---|
Article Number | 15 | |
Number of page(s) | 7 | |
Section | Knee | |
DOI | https://doi.org/10.1051/sicotj/2023012 | |
Published online | 29 May 2023 |
Original Article
How often do we need offset stems for revision total knee arthroplasty? About a consecutive series of 789 knees
1
Orthopaedics Surgery and Sports Medicine Department, FIFA Medical Center of Excellence, Croix-Rousse Hospital, Lyon University Hospital, 69004 Lyon, France
2
Orthopedic Department, General Hospital of Thessaloniki “Papageorgiou”, 56403 Thessaloniki, Greece
3
Melbourne Orthopaedic Group, 33 The Avenue, Windsor, VIC 3181, Australia
4
LIBM – EA 7424, Interuniversity Laboratory of Biology of Mobility, Claude Bernard Lyon 1 University, 69100 Lyon, France
5
University Lyon, Claude Bernard Lyon 1 University, IFSTTAR, LBMC UMR_T9406, 69622 Lyon, France
* Corresponding author: cecile-batailler@hotmail.fr
Received:
26
March
2023
Accepted:
22
April
2023
Introduction: This study aimed to determine the incidence of offset stem usage in revision total knee arthroplasty (rTKA), and to assess the necessity for their use with the femoral and tibial components. Methods: This retrospective radiological study included 862 patients who underwent rTKA between 2010 and 2022. Patients were divided into a non-stem group (group NS), offset stem group (group OS), and straight stem group (group SS). Two senior orthopedic surgeons evaluated all the post-operative radiographs of the group OS to assess the necessity of offset use. Results: In total, 789 patients met all eligibility inclusion criteria and were reviewed (305 males (38.7%)) with a mean age of 72.7 ± 10.2 years old [39; 96]. Eighty-eight (11.1%) patients had undergone rTKA with offset stems (34 tibia, 31 femur, 24 both) and 609 (70.2%) with straight stems. The tibial and femoral stems were diaphyseal of over 75 mm in 83 revisions (94.3%) for group OS and 444 revisions (72.9%) for group SS (p < 0.001). Offset in the tibial component was located medially in 50% of rTKA, while the offset in the femoral component was placed anteriorly in 47.3% of the rTKA. Assessment by the two independent senior surgeons found stems were only necessary in 3.4% of cases. Offset stems were only required for the tibial implant. Discussion: Offset stems were used in 11.1% of revision total knee replacements, however, they were deemed necessary in 3.4% and for the tibial component only.
Key words: Total knee arthroplasty / Revision / Straight stem / Offset stem / Metaphyseal fixation
© The Authors, published by EDP Sciences, 2023
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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