ArticleKnee surgery, sports traumatology, arthroscopy : official journal of the ESSKA2021
Linear influence of distal femur osteotomy on the Q-angle: one degree of varization alters the Q-angle by one degree.
Article in Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.
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Who cites it
13 citing papers in PubMed, 31 citations in OpenAlex.
- Medial closing wedge distal femoral varus osteotomy alters the stress distribution pattern of the patellofemoral joint: An evaluation using computed tomography osteoabsorptiometry.Journal of experimental orthopaedics · 2026Article
- Complex Surgical Management of Permanent Patellar Dislocation in an Adolescent: An Eight-Year Follow-Up Case Report.Children (Basel, Switzerland) · 2025Article
- The Neutral Hinge for Medial Closing Wedge Distal Femur Osteotomy. A 3-dimensional Surgical Simulation Study.Orthopaedic journal of sports medicine · 2025Article
- Quadriceps force direction affects patellofemoral kinematics without impacting tibiofemoral stability: a cadaveric study.Knee surgery & related research · 2025Article
- Strategies for Managing Genu Valgum and Patellar Instability in Skeletally Immature Patients: Weighing One-Stage Against Staged Guided Growth and Medial Patellofemoral Ligament Reconstruction.Journal of the Pediatric Orthopaedic Society of North America · 2025Article
- Radiological Verification for the Suitability of Using the Quadriceps Angle to Represent Orientation of the Quadriceps Femoris.Orthopaedic surgery · 2024Article
- Characterization of the CT-based risk factors for concomitant patellofemoral instability in patients with anterior cruciate ligament injury.European radiology · 2024Article
- TT-TG distance decreases after open wedge distal femoral varization osteotomy in patients with genu valgum & patellar instability. A pilot 3D computed tomography simulation study.BMC musculoskeletal disorders · 2023Article
- Influence of medial open wedge high tibial osteotomy on tibial tuberosity-trochlear groove distance.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2023Article
- Finite element analysis of medial closing and lateral opening wedge osteotomies of the distal femur in relation to hinge fractures.Journal of experimental orthopaedics · 2023Article
- Tibial tubercle-Roman arch (TT-RA) distance is superior to tibial tubercle-trochlear groove (TT-TG) distance when evaluating coronal malalignment in patients with knee osteoarthritis.European radiology · 2022Article
- Analysis of Predictors Affecting Biomechanical Function of the Knee Joint and Its Relation to Anterior Knee Pain.Cureus · 2022Article
- [The influence of axial deformities and their correction on the development and progression of osteoarthritis].Der Orthopade · 2021Review
Corrections and comments
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Authors and funding
5 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeThe effect of a distal femur varization osteotomy on patellofemoral biomechanics in genu valgum is unknown. The purpose of this study was to quantify the influence of frontal leg axis correction on the Q-angle with a novel three-dimensional (3-D) measurement method.
methods3-D surface models of ten lower extremities were generated using patient computed tomography (CT) data. The preoperative 3-D Q-angle was measured using a novel defined and validated 3-D measurement method. Biplanar supracondylar osteotomies were simulated with different degrees of varus correction (from 1° to 15°) in one-degree steps beginning from the preoperative valgus deformity, resulting in a total of 150 simulations. Additionally, mechanical leg axis and 3-D Q-angle measurements were performed on 3-D surface models of the postoperative CT scans of the same individuals. Further, pre- and postoperative TT-TG distance was measured.
resultsMean preoperative Q-angle was 15.8 ± 3.9° (range 10°-21.4°) with a mean preoperative mechanical leg axis of 6.5° ± 2.4 valgus (range 3.8°-11.6° valgus). The Q-angle changed linearly 0.9 ± 0° per 1° of varization. No difference was detected between simulated 3-D Q-angles and effectively corrected postoperative values (n.s.). TT-TG distance changed irregularly and minimally, and with no correlation to the degree of varization.
conclusionDistal femur varization osteotomy has a linear effect on the Q-angle with a change of 1° per 1° of varization. The difference in TT-TG distance was mainly due to an unintentional rotational component implemented during surgery.
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