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Low-dose CT-based i...
Low-dose CT-based implant motion analysis is a precise tool for early migration measurements of hip cups : a clinical study of 24 patients
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- Brodén, Cyrus (author)
- Imperial Coll London, Dept Surg & Canc, London, England; Karolinska Inst, Danderyd Hosp, Dept Clin Sci, Stockholm, Sweden
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- Sandberg, Olof (author)
- Sectra, Linköping, Sweden
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- Sköldenberg, Olof (author)
- Karolinska Institutet
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- Stigbrand, Hampus (author)
- Uppsala universitet,Centrum för klinisk forskning, Gävleborg,Länssjukhuset, Dept Orthoped Surg, Gävle, Sweden
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- Hänni, Mari (author)
- Uppsala universitet,Radiologi
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- Giles, Joshua W (author)
- Univ Victoria, Dept Mech Engn, Victoria, BC, Canada
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- Emery, Roger (author)
- St Marys Hosp, Dept Orthopaed Surg, London, England
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- Lazarinis, Stergios, 1971- (author)
- Uppsala universitet,Ortopedi
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- Nyström, Andreas (author)
- Uppsala universitet,Ortopedi
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- Olivecrona, Henrik (author)
- Karolinska Inst, Dept Mol Med & Surg, Stockholm, Sweden
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(creator_code:org_t)
- 2020-02-14
- 2020
- English.
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In: Acta Orthopaedica. - : Informa UK Limited. - 1745-3674 .- 1745-3682. ; 91:3, s. 260-265
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https://uu.diva-port... (primary) (Raw object)
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Abstract
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- Background and purpose - Early implant migration is known to be a predictive factor of clinical loosening in total hip arthroplasty (THA). Radiostereometric analysis (RSA) is the gold standard used to measure early migration in patients. However, RSA requires costly, specialized imaging equipment and the image process is complex. We determined the precision of an alternative, commercially available, CT method in 3 ongoing clinical THA studies, comprising 3 different cups.Materials and methods - 24 CT double examinations of 24 hip cups were selected consecutively from 3 ongoing prospective studies: 2 primary THA (1 cemented and 1 uncemented) and 1 THA (cemented) revision study. Precision of the CT-based implant motion analysis (CTMA) system was calculated separately for each study, using both the surface anatomy of the pelvis and metal beads placed in the pelvis.Results - For the CTMA analysis using the surface anatomy of the pelvis, the precision ranged between 0.07 and 0.31 mm in translation and 0.20° and 0.39° for rotation, respectively. For the CTMA analysis using beads the precision ranged between 0.08 and 0.20 mm in translation and between 0.20° and 0.43° for rotations. The radiation dose ranged between 0.2 and 2.3 mSv.Interpretation - CTMA achieved a clinically relevant and consistent precision between the 3 different hip cups studied. The use of different hip cup types, different CT scanners, or registration method (beads or surface anatomy) had no discernible effect on precision. Therefore, CTMA without the use of bone markers could potentially be an alternative to RSA to measure early migration.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Ortopedi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Orthopaedics (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Brodén, Cyrus
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Sandberg, Olof
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Sköldenberg, Olo ...
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Stigbrand, Hampu ...
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Hänni, Mari
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Giles, Joshua W
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show more...
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Emery, Roger
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Lazarinis, Sterg ...
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Nyström, Andreas
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Olivecrona, Henr ...
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show less...
- About the subject
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- MEDICAL AND HEALTH SCIENCES
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MEDICAL AND HEAL ...
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and Clinical Medicin ...
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and Orthopaedics
- Articles in the publication
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Acta Orthopaedic ...
- By the university
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Uppsala University
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Karolinska Institutet