Lower-Limb Alignment and Posterior Tibial Slope in Pakistanis: A Radiographic Study
Purpose. To assess the lower-limb alignment and posterior tibial slope in Pakistanis. Methods. 40 male and 19 female healthy Pakistanis aged 20 to 45 years were recruited. A full weight-bearing anteroposterior radiograph of the entire lower limb of each subject was obtained. The axial alignment was...
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doaj-8260768200f74f689ca1767148ef9a4d2020-11-25T03:24:25ZengSAGE PublishingJournal of Orthopaedic Surgery2309-49902010-04-011810.1177/230949901001800105Lower-Limb Alignment and Posterior Tibial Slope in Pakistanis: A Radiographic StudyMujahid Jamil Khattak0Masood Umer1Edward T Davis2Munira Habib3Mehmood Ahmed4 Russell's Hall Hospital NHS Foundation Trust, West Midlands, UK Department of Orthopaedics, Aga Khan University Hospital, Pakistan The Royal Orthopaedics Hospital, NHS Foundation Trust, Birmingham, UK Department of Orthopaedics, Aga Khan University Hospital, Pakistan Institute of Molecular Medicine and Surgery, Karolinska University Hospital, SwedenPurpose. To assess the lower-limb alignment and posterior tibial slope in Pakistanis. Methods. 40 male and 19 female healthy Pakistanis aged 20 to 45 years were recruited. A full weight-bearing anteroposterior radiograph of the entire lower limb of each subject was obtained. The axial alignment was measured based on the centres of the femoral head, knee, and ankle. The tibiofemoral (TF) angle, knee joint line obliquity angle (angle J), and posterior tibial slope were determined. Results. The mean TF angle was more varus in men than women (178.4° vs. 180.0°, p<0.001). The mean angle J was more medially inclined in men than women (93.4° vs. 91.4°, p=0.007). The mean medial tibial slope was greater in women than men (16.0° vs. 12.5°, p<0.001). The posterior tibial slope was greater in women than men (14.1° vs. 12.5°, p=0.02), and was greater than the 5° to 10° commonly reported. Conclusions. Knee alignment and geometry vary in different population subsets. With regard to total knee arthroplasty, the more medially inclined angle J in Pakistani men suggests that an anteroposterior cut of the distal femur should be in increased external rotation, compared with Pakistani women. Whereas the greater posterior tibial slope in Pakistanis suggests that a proximal tibial cut with a greater posterior tibial slope may reduce the chance of tibial loosening and increase postoperative knee range of motion, especially when using posterior cruciate ligament–retaining designs.https://doi.org/10.1177/230949901001800105 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Mujahid Jamil Khattak Masood Umer Edward T Davis Munira Habib Mehmood Ahmed |
spellingShingle |
Mujahid Jamil Khattak Masood Umer Edward T Davis Munira Habib Mehmood Ahmed Lower-Limb Alignment and Posterior Tibial Slope in Pakistanis: A Radiographic Study Journal of Orthopaedic Surgery |
author_facet |
Mujahid Jamil Khattak Masood Umer Edward T Davis Munira Habib Mehmood Ahmed |
author_sort |
Mujahid Jamil Khattak |
title |
Lower-Limb Alignment and Posterior Tibial Slope in Pakistanis: A Radiographic Study |
title_short |
Lower-Limb Alignment and Posterior Tibial Slope in Pakistanis: A Radiographic Study |
title_full |
Lower-Limb Alignment and Posterior Tibial Slope in Pakistanis: A Radiographic Study |
title_fullStr |
Lower-Limb Alignment and Posterior Tibial Slope in Pakistanis: A Radiographic Study |
title_full_unstemmed |
Lower-Limb Alignment and Posterior Tibial Slope in Pakistanis: A Radiographic Study |
title_sort |
lower-limb alignment and posterior tibial slope in pakistanis: a radiographic study |
publisher |
SAGE Publishing |
series |
Journal of Orthopaedic Surgery |
issn |
2309-4990 |
publishDate |
2010-04-01 |
description |
Purpose. To assess the lower-limb alignment and posterior tibial slope in Pakistanis. Methods. 40 male and 19 female healthy Pakistanis aged 20 to 45 years were recruited. A full weight-bearing anteroposterior radiograph of the entire lower limb of each subject was obtained. The axial alignment was measured based on the centres of the femoral head, knee, and ankle. The tibiofemoral (TF) angle, knee joint line obliquity angle (angle J), and posterior tibial slope were determined. Results. The mean TF angle was more varus in men than women (178.4° vs. 180.0°, p<0.001). The mean angle J was more medially inclined in men than women (93.4° vs. 91.4°, p=0.007). The mean medial tibial slope was greater in women than men (16.0° vs. 12.5°, p<0.001). The posterior tibial slope was greater in women than men (14.1° vs. 12.5°, p=0.02), and was greater than the 5° to 10° commonly reported. Conclusions. Knee alignment and geometry vary in different population subsets. With regard to total knee arthroplasty, the more medially inclined angle J in Pakistani men suggests that an anteroposterior cut of the distal femur should be in increased external rotation, compared with Pakistani women. Whereas the greater posterior tibial slope in Pakistanis suggests that a proximal tibial cut with a greater posterior tibial slope may reduce the chance of tibial loosening and increase postoperative knee range of motion, especially when using posterior cruciate ligament–retaining designs. |
url |
https://doi.org/10.1177/230949901001800105 |
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