1. The popliteal surface axis may define hip anteversion
- Author
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Nuran Sabir Akkoyunlu, Alp Akman, Ahmet Fahir Demirkan, and Ali Çağdaş Yörükoğlu
- Subjects
Male ,hip ,Knee Joint ,knee ,Computed tomography ,computer assisted tomography ,Popliteal surface axis ,Trans-epicondylar axis ,Reference Values ,middle aged ,Orthopedics and Sports Medicine ,Femur ,Alternative methods ,medicine.diagnostic_test ,adult ,Rehabilitation ,article ,gold standard ,aged ,female ,Dimensional Measurement Accuracy ,Posterior condylar axis ,Original Article ,axis ,trans-epicondylar axis ,three-dimensional modelling ,three-dimensional imaging ,diagnostic imaging ,Condyle ,Three-dimensional modelling ,Imaging, Three-Dimensional ,Anteversion ,x-ray computed tomography ,medicine ,Humans ,controlled study ,human ,procedures ,reproducibility ,reliability ,business.industry ,Mean value ,reference value ,Reproducibility of Results ,Mean age ,major clinical study ,femur ,popliteal surface axis ,posterior condylar ,Surgery ,Tomography, X-Ray Computed ,business ,Nuclear medicine - Abstract
Objectives: This study aims to investigate the usability and reliability of our new axis in a three-dimensional modelling work and demonstrate if it is a reproducible method for anteversion measurement that sufficiently correlates with other computed tomography (CT)-derived gold standards including transepicondylar axis (TEA) and posterior condylar axis (PCA). Patients and methods: Three-dimensional solid models were derived from left femoral CT data of 100 participants (50 males, 50 females; mean age 57 years: range, 21 to 86). The newly proposed popliteal surface axis (PSA) was compared with TEA and PCA in terms of anteversion measurement on these solid models. Results: Popliteal surface axis was found as a reproducible reference axis in our study as it could be measured in 99% of our sample. The mean value of PSA based anteversion was (-) 1.8 degrees which was 10.7 degrees and 4.4 degrees for PCA and TEA, respectively. Popliteal surface axis was perfectly correlated with PCA and TEA for anteversion measurements (p
- Published
- 2020
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