Difference in the acetabular cup orientation in standing and supine radiographs

Khan, M. Munir; Beckingsale, Tom; Marsh, M.M.; Holland, J

doi:10.1016/j.jor.2016.03.012

Cited by 4 publications

(3 citation statements)

References 31 publications

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“…A further study was conducted by Khan et al (2016) [43] investigating the effect of repositioning on the acetabular cup orientation. Fourteen patients with bilateral joint replacements were included in this study with AP pelvis images acquired in both positions.…”

Section: The Impact Of Repositioning On the Acetabulummentioning

confidence: 99%

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Optimum Positioning for Anteroposterior Pelvis Radiography: A Literature Review

Alzyoud

Hogg

Snaith

et al. 2018

Journal of Medical Imaging and Radiation Sciences

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Aim: Pelvic radiography is used for the identification of hip joint changes, including pathologies such as osteoarthritis. Several studies have recommended that the position for this radiological procedure should be standing, not supine, to reflect the functional appearances of the hip joint. The aim of this review was to evaluate pelvis radiography positioning with respect to the image appearances and information provided for clinical decision-making. Aside from this, potential recommendations to the radiographic technique for an erect pelvis projection will be considered. Method: A literature search was performed using databases/abstract systems (ScienceDirect, Web of Science, PubMed, and MEDLINE). Only articles written in English were included. Results: Twenty-five articles were identified. Findings from the review describe the effect of repositioning from supine to erect on a series of specific hip measurements. These include pelvic tilt, joint space width, and the acetabular component.

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Section: The Impact Of Repositioning On the Acetabulummentioning

confidence: 99%

“…As anteversion increases the cup pressure, contact and lubricating loss will also increase. This will lead to greater wear of the THA and potential for hip dislocation [43].…”

Section: The Impact Of Repositioning On the Acetabulummentioning

confidence: 99%

Optimum Positioning for Anteroposterior Pelvis Radiography: A Literature Review

Alzyoud

Hogg

Snaith

et al. 2018

Journal of Medical Imaging and Radiation Sciences

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show abstract

“…We also calculated the means and SDs of component orientation and PT measured by the bi-planar radiographs, 3D CT reconstruction, and supine CT scans, respectively. We calculated the sample size from the effect size obtained from Khan M et al [ 26 ] using the Gpower 3.1 software. We calculated that a minimum of 42 hips would be required when α = 0.05 for a power of 0.95.…”

Section: Methodsmentioning

confidence: 99%

Assessing component orientation of total hip arthroplasty using the low-dose bi-planar radiographs

Tang

Zhou

et al. 2022

BMC Musculoskelet Disord

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Background Three-dimensional computed tomography (3D CT) reconstruction is the reference standard for measuring component orientation. However, functional cup orientation in standing position is preferable compared with supine position. The low-dose bi-planar radiographs can be used to analyze standing cup component orientation. We aimed to assess the validity and reliability of the component orientation using the low-dose bi-planar radiographs compared with the 3D CT reconstruction, and explore the differences between the functional cup orientation in standing radiographs and supine CT scans. Methods A retrospective study, including 44 patients (50 hips) with total hip arthroplasty (THA), was conducted. CT scans were taken 1 week after surgery and the low-dose bi-planar radiographs were taken in the follow-up 6 weeks later. Component orientation measurement was performed using the anterior pelvic plane and the radiographic coronal plane as reference, respectively. Results The study showed no significant difference in cup anteversion (p = 0.160), cup inclination (p = 0.486), and stem anteversion (p = 0.219) measured by the low-dose bi-planar radiographs and 3D reconstruction. The differences calculated by the Bland–Altman analysis ranged from − 0.4° to 0.6° for the three measured angles. However, the mean absolute error was 4.76 ± 1.07° for functional anteversion (p = 0.035) and 4.02 ± 1.08° for functional inclination (p = 0.030) measured by the bi-planar radiographs and supine CT scans. Conclusions The low-dose bi-planar radiographs are the same reliable and accurate as 3D CT reconstruction to assess post-THA patients’ component orientation, while providing more valuable functional component orientation than supine CT scans.

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