ArticleInternational orthopaedics2021
A higher reliability with a computed tomography scan-based three dimensional technique than with a two dimensional measurement for lower limb discrepancy in total hip arthroplasty planning.
Article in International orthopaedics, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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5 citing papers in PubMed, 11 citations in OpenAlex.
- Accuracy of two different imageless navigation systems for leg length and global offset change in total hip arthroplasty: A comparison using two-dimensional radiographic and three-dimensional CT-based evaluation.International orthopaedics · 2026Article
- Evaluation of migration analysis with AI-based CT-RSA and preoperative 3D-planning in total hip arthroplasty.Acta orthopaedica · 2025Article
- The Value of Computed Tomography Scan in Three-dimensional Planning and Intraoperative Navigation in Primary Total Hip Arthroplasty.Hip & pelvis · 2024Review
- CT validation of intraoperative imageless navigation (Naviswiss) for component positioning accuracy in primary total hip arthroplasty in supine patient position: a prospective observational cohort study in a single-surgeon practice.Arthroplasty (London, England) · 2023Article
- Feasibility and anteversion accuracy of a patient-specific instrument for femoral prosthesis implantation in total hip arthroplasty.Biomedical engineering online · 2023Article
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Authors and funding
3 authors at 3 institutions in 2 countries.
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No grant is acknowledged in the PubMed record.
Abstract
purposeThe goal was to compare the reliability of a novel 3D method with the standard 2D technique for lower limb discrepancy (LLD) measurement during pre-operative THA planning.
methodsThis prospective study included 100 consecutive patients who underwent THA using 3D planning based on a low-dose CT scan. The LLD was subdivided into three parameters: the intra-articular LLD (IA-LLD), the segmental extra-articular LLD (EA-LLD), and the total LLD (T-LLD). The LLD was assessed with a standard 2D technique on CT scanograms and also with a 3D method. A pelvic reference line (PBL) was determined as the 3D line joining the deepest part of the two great sciatic notches. The IA length was measured from the lesser trochanters (MLT) to the PBL. The EA length was measured from the MLT to the ankle center, and the total length was measured from the ankle center to the PBL. The intra- and inter-observer reliability of the measurements was assessed with the intra-class correlation coefficient (ICC).
resultsThe intra-observer ICC was higher with the 3D technique for IA-LLD (0.96-0.97 vs. 0.79-0.84), EA-LLD (0.96 vs. 0.78-0.92), and T-LLD (0.99 vs. 0.90-0.97). Inter-observer ICC was also higher with the 3D technique for IA-LLD (0.90-0.94 vs. 0.70-0.84) and EA-LLD (0.93-0.96 vs. 0.80-0.82), but not for T-LLD (0.91-0.94 vs. 0.91-0.94).
conclusionThe presented 3D method has a higher reliability than 2D assessment of LLD during pre-operative THA planning. This article presents the first discussion of measuring LLD from 3D models. As 3D reconstruction becomes both more feasible and less-invasive, this study has interest to the orthopaedic surgeon.
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