Comparison of six radiographic projections to assess femoral head/neck asphericity

Meyer, Dominik C; Beck, Martin; Ellis, Tom; Ganz, Reinhold; Leunig, Michael (2006). Comparison of six radiographic projections to assess femoral head/neck asphericity. Clinical orthopaedics and related research, 445, pp. 181-185. Heidelberg: Springer 10.1097/01.blo.0000201168.72388.24

[img] Text
Comparison_of_Six_Radiographic_Projections_to.23.pdf - Published Version
Restricted to registered users only
Available under License Publisher holds Copyright.

Download (276kB) | Request a copy

Early radiographic detection of femoroacetabular impingement might prevent initiation and progression of osteoarthritis. The structural abnormality in femoral-induced femoroacetabular impingement (cam type) is frequently asphericity at the anterosuperior head/neck contour. To determine which of six radiographic projections (anteroposterior, Dunn, Dunn/45 degrees flexion, cross-table/15 degrees internal rotation, cross-table/neutral rotation, and cross-table/15 degrees external rotation) best identifies femoral head/neck asphericity, we studied 21 desiccated femurs; 11 with an aspherical femoral head/neck contour and 10 with a spherical femoral head/neck contour. To radiographically quantify femoral head asphericity, we measured the angle where the femoral head/neck leaves sphericity (angle alpha). The aspherical femoral head/neck contours had a greater maximum angle alpha (70 degrees ) compared with the spherical head/neck contours (50 degrees ). The angle alpha varied depending on the radiographic projection: it was greatest in the Dunn view with 45 degrees hip flexion (71 degrees +/- 10 degrees ) and least in the cross-table view in 15 degrees external rotation (51 degrees +/- 7 degrees ). Diagnosis of a pathologic femoral head/neck contour depends on the radiologic projection. The Dunn view in 45 degrees or 90 degrees flexion or a cross-table projection in internal rotation best show femoral head/neck asphericity, whereas anteroposterior or externally rotated cross-table views are likely to miss asphericity. Level of Evidence: Prognostic study, level II-1 (retrospective study).

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Department of Orthopaedic, Plastic and Hand Surgery (DOPH) > Clinic of Orthopaedic Surgery

UniBE Contributor:

Beck, Martin

ISSN:

0009-921X

ISBN:

16456309

Publisher:

Springer

Language:

English

Submitter:

Factscience Import

Date Deposited:

04 Oct 2013 14:51

Last Modified:

05 Dec 2022 14:15

Publisher DOI:

10.1097/01.blo.0000201168.72388.24

PubMed ID:

16456309

Web of Science ID:

000243020300024

BORIS DOI:

10.48350/21495

URI:

https://boris.unibe.ch/id/eprint/21495 (FactScience: 7249)

Actions (login required)

Edit item Edit item
Provide Feedback