Purpose
To compare radiographic parameters of acetabular morphology between standard and modified
false-profile (FP) radiographs.
Methods
Standard and modified FP radiographs were obtained in 225 hips in 200 consecutive
patients evaluated for hip pain and suspected femoroacetabular impingement. Radiographs
were retrospectively reviewed by 2 readers to determine the anterior center-edge angle
(ACEA), as assessed to the sourcil and to the bone edge. Inter-rater reliability of
radiographic measurements was assessed using the intraclass correlation coefficient.
Measurements were evaluated for normality with the Shapiro-Wilk test, averaged between
the 2 readers, and compared between views using the paired Wilcoxon test.
Results
The intraclass correlation coefficient values for standard and modified FP views were
0.923 and 0.932, respectively, measuring to the sourcil and 0.867 and 0.896, respectively,
measuring to the lateral bone edge. The median difference in ACEA measurements to
the sourcil was 1° between the standard and modified FP view (45° vs 44°, P < .001). The median difference in ACEA measurements to the bone edge was 2° (34°
vs 32°, P < .001).
Conclusions
Thirty-five degrees of femoral internal rotation for a modified FP hip radiographic
view provides similar clinical information regarding acetabular morphology to that
of the standard FP view. Given that the modified FP view also provides better visualization
of the anterosuperior head-neck junction cam lesion, the modified FP view may be preferred
over the standard FP view in evaluation of hip pain in the young patient.
Level of Evidence
Level III, retrospective comparative study.
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Article info
Publication history
Accepted:
May 23,
2019
Received:
November 12,
2018
Footnotes
The authors report the following potential conflicts of interest or sources of funding: T.G.M. is a paid speaker for Arthrex. S.K.A. is a paid education speaker for Stryker Medical. Full ICMJE author disclosure forms are available for this article online, as supplementary material.
See commentary on page 3067
Identification
Copyright
© 2019 by the Arthroscopy Association of North America
ScienceDirect
Access this article on ScienceDirectLinked Article
- Editorial Commentary: Modified False-Profile View—Two Birds With One Stone?ArthroscopyVol. 35Issue 11
- PreviewPathology in the hip is most commonly described using radiographic parameters. Accurately delineating this pathology is paramount in proper diagnosis and care. The anterior center-edge angle measures the anterior coverage of the acetabulum, which has implications in treating the hip. The modified false-profile view will allow visualization of not only the anterior coverage of the femoral head but also the patient's alpha angle. As such, the modified false-profile view could replace both the standard false-profile view and the 45° Dunn view, essentially reducing by 1 the number of images required to evaluate patients presenting with hip symptoms.
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