ArticleBMC musculoskeletal disorders2021
Accuracy of image-free navigation in intraoperative leg length change from total hip arthroplasty using evaluations from 2D and 3D measurements.
Article in BMC musculoskeletal disorders, 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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Who cites it
5 citing papers in PubMed.
- 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
- Technology in Total Hip Arthroplasty: Recent Advancements.Orthopedic reviews · 2026Article
- Accuracy of leg length changes in total hip arthroplasty using a computed tomography-based augmented reality navigation system.Archives of orthopaedic and trauma surgery · 2024Article
- Two- and three-dimensional measurements of leg length change using an accelerometer-based portable navigation system in total hip arthroplasty.BMC musculoskeletal disorders · 2023Article
- Does the use of intraoperative measurement reduce limb length discrepancies after total hip arthroplasty?BMC musculoskeletal disorders · 2023Article
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Authors and funding
5 authors.
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Abstract
backgroundLeg length discrepancy is one of the most common problems after total hip arthroplasty (THA). The aim of this study was to investigate the accuracy of image-free navigation in intraoperative leg length change (LLC) using evaluations from anteroposterior radiographs (2D measurement) and 3D bone models using CT data (3D measurement).
methodsOne hundred THAs with cementless cups and stems were performed using an image-free navigation system in our hospital. We evaluated the accuracy of image-free navigation based on LLC from 2D and 3D measurements. Furthermore, we also investigated error in absolute value and correlations between 2D and 3D measurements in LLC.
resultsThe accuracy of image-free navigation based on 2D measurement was 94% within 5 mm and 76% within 3 mm. The accuracy of image-free navigation based on 3D measurement was 92% within 5 mm and 81% within 3 mm. The error in absolute value in LLC between 2D and 3D measurements was 1.7 ± 1.4 mm (range, 0 to 6 mm). A strong correlation was observed between 2D and 3D measurements in the LLC.
conclusionsIn the present study, good accuracy of image-free navigation in intraoperative LLC was confirmed for both evaluation methods from 2D and 3D measurements. In addition, the error in absolute value in the LLC between 2D and 3D measurements was very small, and we observed a strong correlation between 2D and 3D measurements. Based on these results, evaluation of LLC from radiographs was considered sufficient if radiographs can be taken accurately.
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