Abstract:
PURPOSE:To explore ipsilateral and contralateral acetabular roof bone stock density in unilateral large head MoM THA whether there is a significant lower acetabular bone stock in the hip with a metal-on-metal (MoM) total hip replacement compared to the contralateral side. Second part of this study is to examine if there are any associates with regard to potential bone stock density difference. MATERIALS & METHODS:A database of 317 patients with unilateral metal-on-metal (MoM) total hip replacements was set up retrospectively for this study. On computed tomography scans, conducted after a relative short in situ time period averaging 2.8 years, regions-of-interests were drawn in the trabecular bone of the acetabulum to measure average Hounsfield Units (HU). HU differences were calculated and tested by Wilcoxon signed-rank test. Univariate analysis was conducted to examine associates of potential bone loss. RESULTS:In a population of 317 patients (156 male, 161 female) with an average age of 61.9 ± 7.8, the median HU on the side of the MoM replacement was 123.3 (7.6-375.4). On the contralateral side, median HU was 144.7 (-0.4 to 332.8). The median HU difference was 21.4 after a mean post-operative in situ time of 2.8 years. The Wilcoxon signed-rank test proved a significant difference (p<0.001). Univariate analyses show that the in situ time of the MoM THA has a significant correlation with the bone density difference. CONCLUSION:Results show a significant lower bone density at the acetabular roof at the side of the prosthesis compared with the contralateral side after short in situ time of the MoM THA in patients with unilateral MoM total hip replacements. In our patient population, the in situ time showed a significant association with the acetabular bone density difference. As acetabular roof bone stock measurements are feasible and show temporal decline this could become an important parameter to be used in orthopedic decision making for revision surgery.
journal_name
Eur J Radioljournal_title
European journal of radiologyauthors
Boomsma MF,Slouwerhof I,van Lingen C,Pakvis DF,van Dalen JA,Edens MA,Ettema HB,Verheyen CC,Maas Mdoi
10.1016/j.ejrad.2016.01.019subject
Has Abstractpub_date
2016-04-01 00:00:00pages
760-3issue
4eissn
0720-048Xissn
1872-7727pii
S0720-048X(16)30018-3journal_volume
85pub_type
杂志文章abstract:PURPOSE:This study assesses the rate of enhancement of breast fibroglandular tissue after administration of a magnetic resonance imaging (MRI) gadolinium-based contrast agent and determines its relationship with response to neoadjuvant therapy (NAT) in women with breast cancer. METHOD:Women with locally advanced breas...
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journal_title:European journal of radiology
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journal_title:European journal of radiology
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abstract::A technique for the biopsy of abdominal masses consisting of the simultaneous insertion of multiple needles is described. This technique was employed in 45 patients. The results were compared with the author's preceding experience with 32 cases performed with a conventional technique of sequential biopsies. Adequate s...
journal_title:European journal of radiology
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更新日期:2012-04-01 00:00:00
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更新日期:2012-03-01 00:00:00
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journal_title:European journal of radiology
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