Back to Search
Start Over
Three-Dimensional Biometrics to Correlate Hindfoot and Knee Coronal Alignments Using Modern Weightbearing Imaging.
- Source :
-
Foot & ankle international [Foot Ankle Int] 2020 Nov; Vol. 41 (11), pp. 1411-1418. Date of Electronic Publication: 2020 Jul 23. - Publication Year :
- 2020
-
Abstract
- Background: Previous studies focusing on the effects of knee surgery on hindfoot alignment have suggested some degree of compensation between the knee and the hindfoot. However, these studies did not investigate a preoperative relationship in patients without end-stage knee osteoarthritis using 3-dimensional (3D) biometrics. The purpose of this study was to investigate the relationship between knee and hindfoot alignment using 3D weightbearing imaging.<br />Methods: This retrospective comparative study included 95 lower limbs with weightbearing computed tomography and low-dose biplanar radiograph investigations. Cases with a history that may have caused a change in lower limb alignment were excluded. Hindfoot and knee alignments were measured using foot ankle offset (FAO) and hip-knee-ankle (HKA) angle, respectively. Patients were separated into 3 groups according to the knee deformity to investigate the distribution of FAO in each group.<br />Results: The mean (SD) FAO was 2% (7%) for the knee varus group, 1% (6%) for the neutral knee group, and 4% (5%) for the valgus knee group ( P = .12). Fifty-three percent of patients with knee valgus showed a pathological hindfoot valgus ( P = .04). We found a positive but moderate correlation between hindfoot valgus and HKA (ρ = 0.53; P = .01). Female sex was associated with higher FAO (3% ± 4% vs 0.6% ± 6%; P = .009).<br />Conclusion: This feasibility study suggests a new opportunity using 3D biometrics to understand the relationship between knee and hindfoot alignment and to highlight different patterns of combined deformities in further investigations.<br />Level of Evidence: Level III, comparative study.
- Subjects :
- Adult
Aged
Biomechanical Phenomena
Feasibility Studies
Female
Humans
Male
Middle Aged
Radiography
Retrospective Studies
Tomography, X-Ray Computed
Ankle Joint diagnostic imaging
Ankle Joint physiopathology
Bone Malalignment diagnostic imaging
Bone Malalignment physiopathology
Knee Joint diagnostic imaging
Knee Joint physiopathology
Weight-Bearing physiology
Subjects
Details
- Language :
- English
- ISSN :
- 1944-7876
- Volume :
- 41
- Issue :
- 11
- Database :
- MEDLINE
- Journal :
- Foot & ankle international
- Publication Type :
- Academic Journal
- Accession number :
- 32698631
- Full Text :
- https://doi.org/10.1177/1071100720938333