Stem anteversion is not affected by proximal femur geometry in robotic-assisted total hip arthroplasty.

Autor: Marcovigi A; Department of Orthopaedic Surgery, Azienda Ospedaliero-Universitaria Policlinico di Modena, University of Modena and Reggio-Emilia, Via del Pozzo 71, Modena, MO, 41125, Italy., Grandi G; Department of Orthopaedic Surgery, Azienda Ospedaliero-Universitaria Policlinico di Modena, University of Modena and Reggio-Emilia, Via del Pozzo 71, Modena, MO, 41125, Italy., Bianchi L; Department of Orthopaedic Surgery, Azienda Ospedaliero-Universitaria Policlinico di Modena, University of Modena and Reggio-Emilia, Via del Pozzo 71, Modena, MO, 41125, Italy., Zambianchi F; Department of Orthopaedic Surgery, Azienda Ospedaliero-Universitaria Policlinico di Modena, University of Modena and Reggio-Emilia, Via del Pozzo 71, Modena, MO, 41125, Italy. francesco.zambianchi@gmail.com., Pavesi M; Ab Medica S.p.A., Cerro Maggiore, MI, 20023, Italy., Catani F; Department of Orthopaedic Surgery, Azienda Ospedaliero-Universitaria Policlinico di Modena, University of Modena and Reggio-Emilia, Via del Pozzo 71, Modena, MO, 41125, Italy.
Jazyk: angličtina
Zdroj: Arthroplasty (London, England) [Arthroplasty] 2024 Jun 02; Vol. 6 (1), pp. 27. Date of Electronic Publication: 2024 Jun 02.
DOI: 10.1186/s42836-024-00248-0
Abstrakt: Background: In the present study, the surgeon aimed to align the stem at 5° to 25° in anteversion. The robotic technology was used to measure stem anteversion with respect to proximal femur anteversion at different levels down the femur.
Methods: A total of 102 consecutive patients underwent robotic-arm-assisted total hip arthroplasty (RTHA). 3D CT-based preoperative planning was performed to determine femoral neck version (FNV), posterior cortex anteversion (PCA), anterior cortex anteversion (ACA), and femoral metaphyseal axis anteversion (MAA) at 3 different levels: D (10 mm above lesser trochanter), E (the midpoint of the planned neck resection line) and F (head-neck junction). The robotic system was used to define and measure stem anteversion during surgery.
Results: Mean FNV was 6.6° (SD: 8.8°) and the mean MAA was consistently significantly higher than FNV, growing progressively from proximal to distal. Mean SV was 16.4° (SD: 4.7°). There was no statistically significant difference (P = 0.16) between SV and MAA at the most distal measured level. In 96.1% cases, the stem was positioned inside the 5°-25° anteversion range.
Conclusions: Femoral anteversion progressively increased from neck to proximal metaphysis. Aligning the stem close to femoral anteversion 10 mm above the lesser trochanter often led to the desired component anteversion.
(© 2024. The Author(s).)
Databáze: MEDLINE
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