The anatomical SP-CL stem demonstrates a non-progressing migration pattern in the first year: a low dose CT-based migration study in 20 patients.
Background and purpose — RSA is the gold standard for evaluation of early implant migration. We report the results of a new CT-based method Sectra CT micromotion analysis (CTMA) applied to assess the migration pattern in 20 patients in the 1st year after surgery, both with and without the use of tan...
| Publicado en: | Acta Orthopaedica Vol. 91; no. 6; pp. 654 - 660 |
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| Autores principales: | , , , |
| Formato: | diagnostic images equations & formulas pictorial research Journal Article |
| Publicado: |
Medical Journals Sweden AB
Dec2020
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=148075944&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 148075944 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 17453674 1BVL jtl: Acta Orthopaedica issn: 17453674 maglogo: N pubinfo: dt: Dec2020 vid: 91 iid: 6 pid: 59195 pub: Medical Journals Sweden AB artinfo: ui: 148075944 146448866 148075944 148075944 10.1080/17453674.2020.1832294 148075944 ppf: 654 ppct: 6 formats: fmt: – @attributes: type: T – @attributes: type: P tig: atl: The anatomical SP-CL stem demonstrates a non-progressing migration pattern in the first year: a low dose CT-based migration study in 20 patients. aug: au: Sandberg, Olof Tholén, Simon Carlsson, Sofia Wretenberg, Per affil: Sectra AB, Linköping sug: subj: Tomography, X-Ray Computed Methods Surgical Patients Prosthesis Design Postoperative Period Foreign-Body Migration Human Male Female Middle Age Postoperative Care Intrarater Reliability Interrater Reliability Descriptive Statistics Confidence Intervals Odds Ratio Middle Aged: 45-64 years Male Female ab: Background and purpose — RSA is the gold standard for evaluation of early implant migration. We report the results of a new CT-based method Sectra CT micromotion analysis (CTMA) applied to assess the migration pattern in 20 patients in the 1st year after surgery, both with and without the use of tantalum beads in the bone. The patients had an SP-CL anatomical stem that uses an S-shape, designed to better fit the curvature of the femur. Patients and methods — 20 THA patients (mean age 61 years, 10 female) received SP-CL stems, tantalum markers in the femur, and low-dose CT scans at 1 day, 3 months and 12 months postoperatively. In addition, precision as well as inter- and intra-observer variability of the 12-month migration was measured. Results — The 3-month subsidence was median 0.5 mm (95% CI 0.3–1.0) and the internal rotation 1.8° (CI 0.9–2.6). At 12 months the corresponding values were 0.6 (CI 0.3–1.6) mm and 1.9° (CI 0.8–2.4). Precision was 0.1 to 0.3 mm and 0.1° to 0.4° at 3 and 12 months. Intra- and inter- observer variability yielded R-values averaging 0.96 and 0.98. Interpretation — The migration mainly took place during the 1st 3 months, in line with other uncemented stems. The number of patients with subsidence over 2 mm in the first year (5) might be due to the design of the prosthesis with an anatomical shape. Alternatively, our results might indicate a challenge when choosing the correct size for these new anatomical stems. CTMA provided precise and highly repeatable measurements of migration without the need for tantalum markers. pubtype: Academic Journal doctype: diagnostic images equations & formulas pictorial research Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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