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Publisher: Peytchinski Publishing Ltd.
ISSN: 1312-773X (Online)
Issue: 2021, vol. 27, issue1
Subject Area: Medicine
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DOI: 10.5272/jimab.2021271.3518
Published online: 12 January 2021
Original article
J of IMAB. 2021 Jan-Mar;27(1):3518-3522
ELEVATION OF THE CENTER OF ROTATION WITH THE USE OF JUMBO CUPS IN REVISION TOTAL HIP ARTHROPLASTY – A RADIOGRAPHIC STUDY
Maksim Zagorov1
, Kalin Mihov1, Svetoslav Dobrilov1, Gergana Nenova2,
1) Department of Orthopaedics and Traumatology, University Hospital St. Marina - Varna, Bulgaria.
2) Training sector of Kinesitherapy, Faculty of Public Health, Medical University, Varna, Bulgaria.
ABSTRACT:
Background: Acetabular revision with extra-large (jumbo) cementless cups is an effective treatment for many cavitary and segmental peripheral bone defects. However, hip center elevation may occur with the use of a jumbo cup owing to the superior direction of reaming and the increased diameter of the component compared with the native acetabulum.
Purposes: The primary goal of this study was to evaluate the radiographically observed hip center elevation with the use of jumbo cups in acetabular and total hip revision at our institution.
Materials and methods: We retrospectively reviewed control radiographic images of 43 consecutive patients treated with acetabular and total hip revision arthroplasty with a press-fit cementless cup. The difference between the height of the rotation center of the acetabular cup and the height of the rotation center of the contralateral native hip relative to the inter teardrop line was radiographically measured.
Results: The radiographically measured mean elevation of the rotation center of the jumbo cup was 8,75 mm, which yielded an average increase in the height of the rotation centre of 83,6. A mean vertical shift of the rotation center of 0,72 mm was estimated for every 1 mm increase in the size of the jumbo cup.
Conclusions: Our results indicate that the use of jumbo cups in revision hip arthroplasty leads to elevation of the rotation center of the hip with an average of 9 mm. This could be considered by the surgeon in an attempt to restore leg length, stability and biomechanics of the prosthetic hip.
Keywords: hip revision, jumbo cup, center of rotation, elevation,
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Please cite this article as: Zagorov M, Mihov K, Dobrilov S, Nenova G. Elevation of the center of rotation with the use of jumbo cups in revision total hip arthroplasty – a radiographic study. J of IMAB. 2021 Jan-Mar;27(1):3518-3522. DOI: 10.5272/jimab.2021271.3518
Correspondence to: Maksim Zagorov, Department of Orthopaedics and Traumatology, University Hospital „St. Marina", Varna; 1, Hristo Smirnenski blvd., 9000 Varna, Bulgaria; E-mail: dr_zagorov@mail.bg
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Received: 18 November 2019
Published online: 12 January 2021