The impact of limb loading and the measurement modality (2D versus 3D) on the measurement of the limb loading dependent lower extremity parameters

Deformity assessment and preoperative planning of realignment surgery are conventionally based on weight-bearing (WB) radiographs. However, newer technologies such as three-dimensional (3D) preoperative planning and surgical navigation with patient-specific instruments (PSI) rely on non-weight beari...

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Bibliographic Details
Published in:BMC musculoskeletal disorders 2020-06, Vol.21 (1), p.418-418, Article 418
Main Authors: Jud, Lukas, Roth, Tabitha, Fürnstahl, Philipp, Vlachopoulos, Lazaros, Sutter, Reto, Fucentese, Sandro F
Format: Article
Language:English
Subjects:
Adolescent
Adult
Ankle
Comparative analysis
Computed tomography
Computer-assisted surgery
Corrective osteotomy
Diagnosis
Diagnostic imaging
Female
Humans
Imaging, Three-Dimensional
Knee
Leg
Leg deformity
Limb Deformities, Congenital - diagnostic imaging
Limb Deformities, Congenital - surgery
Lower Extremity - diagnostic imaging
Lower Extremity - surgery
Male
Medical examination
Medical imaging
Middle Aged
Models, Anatomic
Musculoskeletal abnormalities
Musculoskeletal diseases
Navigation
Osteotomy
Osteotomy - methods
Patients
Planning
Principal components analysis
Radiography
Reproducibility of Results
Software
Surgeons
Surgery
Surgery, Computer-Assisted
Switzerland
Three-dimensional planning
Tomography, X-Ray Computed - methods
Values
Young Adult
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Summary:Deformity assessment and preoperative planning of realignment surgery are conventionally based on weight-bearing (WB) radiographs. However, newer technologies such as three-dimensional (3D) preoperative planning and surgical navigation with patient-specific instruments (PSI) rely on non-weight bearing (NWB) computed tomography (CT) data. Additionally, differences between conventional two-dimensional (2D) and 3D measurements are known. The goal of the present study was to systematically analyse the influence of WB and the measurement modality (2D versus 3D) on common WB-dependent measurements used for deformity assessment. 85 lower limbs could be included. Two readers measured the hip-knee-ankle angle (HKA) and the joint line convergence angle (JLCA) in 2D WB and 2D NWB radiographs, as well as in CT-reconstructed 3D models using an already established 3D measurement method for HKA, and a newly developed 3D measurement method for JLCA, respectively. Interrater and intermodality reliability was assessed. Significant differences between WB and NWB measurements were found for HKA (p 
ISSN:1471-2474
1471-2474
DOI:10.1186/s12891-020-03449-1