Does cup position differ between trabecular metal and titanium cups? A radiographic propensity score matched study of 300 hips.
Background and purpose — The use of trabecular metal cups in primary total hip arthroplasty (THA) is increasing, despite the survival of Continuum cups being slightly inferior compared with other uncemented cups in registries. This difference is mainly explained by a higher rate of dislocation revis...
| Publicado en: | Acta Orthopaedica Vol. 91; no. 6; pp. 682 - 687 |
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| Autores principales: | , , , , , , , , |
| Formato: | diagnostic images research tables/charts 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=148075920&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 148075920 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: 148075920 145552405 148075920 148075920 10.1080/17453674.2020.1788290 148075920 ppf: 682 ppct: 5 formats: fmt: – @attributes: type: T – @attributes: type: P tig: atl: Does cup position differ between trabecular metal and titanium cups? A radiographic propensity score matched study of 300 hips. aug: au: Laaksonen, Inari Hjelmberg, Natalie Gromov, Kirill Eskelinen, Antti E Rolfson, Ola Malchau, Henrik Troelsen, Anders Mäkelä, Keijo T Mohaddes, Maziar affil: Department of Orthopedics and Traumatology, Turku University Hospital, Turku, Finland, Finnish Arthroplasty Register, Helsinki, Finland sug: subj: Hip Dislocation Pathology Hip Dislocation Surgery Hip Anatomy and Histology Arthroplasty, Replacement, Hip Methods Outcomes (Health Care) Postoperative Complications Risk Factors Risk Assessment Human Probability Comparative Studies Hip Pathology Osteoarthritis Hip Radiography Software Confidence Intervals Descriptive Statistics Matched-Pair Analysis ab: Background and purpose — The use of trabecular metal cups in primary total hip arthroplasty (THA) is increasing, despite the survival of Continuum cups being slightly inferior compared with other uncemented cups in registries. This difference is mainly explained by a higher rate of dislocation revisions. Cup malpositioning is a risk factor for dislocation and, being made of a highly porous material, Continuum cups might be more difficult to position. We evaluated whether Continuum cups had worse cup positioning compared with other uncemented cups. Patients and methods — Based on power calculation, 150 Continuum cups from 1 center were propensity score matched with 150 other uncemented cups from 4 centers. All patients had an uncemented stem, femoral head size of 32 mm or 36 mm, and BMI between 19 and 35. All operations were done for primary osteoarthrosis through a posterior approach. Patients were matched using age, sex, and BMI. Cup positioning was measured from anteroposterior pelvic radiograph using the Martell Hip Analysis Suite software. Results — There was no clinically relevant difference in mean inclination angle between the study group and the control group (43° [95% CI 41–44] and 43° [CI 42–45], respectively). The study group had a larger mean anteversion angle compared with the control group, 19° (CI 18–20) and 17° (CI 15–18) respectively. Interpretation — Continuum cups had a greater anteversion compared with the other uncemented cups. However, the median anteversion was acceptable in both groups and this difference does not explain the larger dislocation rate in the Continuum cups observed in earlier studies. pubtype: Academic Journal doctype: diagnostic images research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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