Abstract:
PURPOSE:Computed tomography (CT) is widely used to assess component rotation in patients with poor results after total knee arthroplasty (TKA). The purpose of this study was to simultaneously determine the accuracy and reliability of CT in measuring TKA component rotation. METHODS:TKA components were implanted in dry-bone models and assigned to two groups. The first group (n = 7) had variable femoral component rotations, and the second group (n = 6) had variable tibial tray rotations. CT images were then used to assess component rotation. Accuracy of CT rotational assessment was determined by mean difference, in degrees, between implanted component rotation and CT-measured rotation. Intraclass correlation coefficient (ICC) was applied to determine intra-observer and inter-observer reliability. RESULTS:Femoral component accuracy showed a mean difference of 2.5° and the tibial tray a mean difference of 3.2°. There was good intra- and inter-observer reliability for both components, with a femoral ICC of 0.8 and 0.76, and tibial ICC of 0.68 and 0.65, respectively. CONCLUSIONS:CT rotational assessment accuracy can differ from true component rotation by approximately 3° for each component. It does, however, have good inter- and intra-observer reliability.
journal_name
Int Orthopjournal_title
International orthopaedicsauthors
Figueroa J,Guarachi JP,Matas J,Arnander M,Orrego Mdoi
10.1007/s00264-015-2917-1subject
Has Abstractpub_date
2016-04-01 00:00:00pages
709-14issue
4eissn
0341-2695issn
1432-5195pii
10.1007/s00264-015-2917-1journal_volume
40pub_type
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journal_title:International orthopaedics
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journal_title:International orthopaedics
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pub_type: 杂志文章,随机对照试验
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journal_title:International orthopaedics
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pub_type: 杂志文章
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pub_type: 杂志文章
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pub_type: 临床试验,杂志文章
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pub_type: 临床试验,杂志文章
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journal_title:International orthopaedics
pub_type: 杂志文章
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journal_title:International orthopaedics
pub_type: 杂志文章
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journal_title:International orthopaedics
pub_type: 杂志文章
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journal_title:International orthopaedics
pub_type: 杂志文章
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更新日期:2014-05-01 00:00:00
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pub_type: 杂志文章,多中心研究
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更新日期:2016-09-01 00:00:00
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pub_type: 杂志文章
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更新日期:2007-06-01 00:00:00