ArticleOrthopaedic journal of sports medicine2023
Effects of Malpositioning of the Knee on Radiographic Measurements: The Influence of Adduction, Abduction, and Malrotation on Measured Tibial Slope.
Article in Orthopaedic journal of sports medicine, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.
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Who cites it
14 citing papers in PubMed, 24 citations in OpenAlex.
- Proximal anatomical axes show bidirectional variability: Accurate tibial slope requires mechanical axis measurement.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2026Article
- Rotational Subluxation Patterns on Stress Radiography and Clinical Relevance in PCL-Deficient Knees: A 2D-3D Registration Study.Orthopaedic journal of sports medicine · 2026Article
- Posterior tibial slope increases over time in patients undergoing revision ACL reconstruction: A long-term radiographic follow-up study.Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA · 2026Article
- Posterior Tibial Plateau Offset Is Reduced During Total Knee Arthroplasty and Is Associated with Tibial Component Malpositioning.Medical sciences (Basel, Switzerland) · 2026Article
- Morphological approaches for optimizing lateral knee radiographs in normal knees and knees with osteoarthritis.Radiological physics and technology · 2026Article
- Effects of axial malrotation on posterior tibial slope measurement: a digitally reconstructed radiograph study enabling automated quality assessment.Knee surgery & related research · 2026Article
- The length of lateral radiographs significantly impacts the measurement of the femoral intramedullary axis in patients undergoing total knee arthroplasty.Arthroplasty (London, England) · 2026Article
- Increased medial posterior tibial slope is associated with medial compartment osteoarthritis of the knee.Journal of experimental orthopaedics · 2026Article
- Malrotated lateral radiographs do not allow for proper assessment of patellar height using the Caton-Deschamps Index.Journal of experimental orthopaedics · 2026Article
- Local soft tissue thickness is a superior predictor of accuracy of implant alignment compared to body mass index in total knee arthroplasty.Arthroplasty (London, England) · 2025Article
- Measuring Posterior Tibial Slope: A Comparison Using a 10-cm Anatomic Axis Versus 15-cm Anatomic Axis.Orthopaedic journal of sports medicine · 2025Article
- Semiautomated Three-Dimensional Landmark Placement on Knee Models Is a Reliable Method to Describe Bone Shape and Alignment.Arthroscopy, sports medicine, and rehabilitation · 2025Article
- Proximal tibial anatomical axis and anterior tibial cortex-based measurements of posterior tibial slope on lateral radiographs differ least from actual posterior tibial slope-A biomechanical study.Journal of experimental orthopaedics · 2024Article
- The accuracy of preoperative implant size prediction achieved by digital templating in total knee arthroplasty is not affected by the quality of lateral knee radiographs.Journal of experimental orthopaedics · 2024Article
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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
Background: Increased posterior tibial slope (PTS) is a risk factor for knee pathology. Accurate measurement of PTS is predicated on a quality lateral knee radiograph; however, little is known about how the quality of the radiograph affects the measured PTS. Purposes: To (1) describe a method for measuring malalignment on lateral knee radiographs, (2) assess the effects of malpositioning of the knee on radiographic measures of malalignment, and (3) determine any correlations between malalignment and the measured PTS. Study Design: Descriptive laboratory study. Methods: Using a setup similar to that of a standard radiology suite, 25 sets of radiographs were taken using 5 sawbone models. Each set included a true lateral view and separate malpositioned radiographs at 5°, 10°, and 15° of adduction, abduction, internal rotation, and external rotation. Malalignment for each radiograph was quantified as the anterior-posterior distance (APD) and proximal-distal distance (PDD) between femoral condyles. The medial PTS was measured in duplicate, and the interrater reliability was calculated. Results: The interrater reliability was excellent, with intraclass correlation coefficients of 0.92, 0.91, and 0.96 for the APD, PDD, and PTS, respectively. Malrotation significantly affected the APD ( Conclusion: The measured PTS was more sensitive to malpositioning by abduction/adduction than by malrotation. Malrotation affected the APD, while abduction/adduction affected the PDD. Thus, the accuracy of the measured PTS was compromised more by poorly aligned distal femoral condyles than it was by poorly aligned posterior femoral condyles. Clinical Relevance: To minimize the effects of malpositioning, we recommend utilizing radiographs with a |PDD| of <5 mm and an |APD| of <15 mm when measuring the PTS.
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