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. 2020 Feb;11(Suppl 1):S82-S85.
doi: 10.1016/j.jcot.2019.06.010. Epub 2019 Jun 11.

Is acetabular morphology related to trochlear dysplasia?

R Rajakulasingam  1 , J Murphy  1 , C E Bache  2 , S L James  1 , R Botchu  1
Affiliations

Is acetabular morphology related to trochlear dysplasia?

R Rajakulasingam et al. J Clin Orthop Trauma. 2020 Feb.

Abstract

Purpose: To evaluate the correlation between trochlear dysplasia and acetabular coverage.

Materials and methods: 109 retrospective CT studies referred from the young adult knee clinic were independently reviewed by two observers. Anterior acetabular (AASA) and posterior acetabular (PASA) sector angles were calculated bilaterally on axial CT. Trochlear dysplasia was graded using the Dejour classification (A-D). ANOVA test was used.

Results: Dejour types A, B and D trochlear dysplasia were associated with a significantly increased AASA (P value = 0.0011).

Conclusion: Our results demonstrate a significant relationship between trochlear dysplasia and anterior acetabular coverage, as measured by AASA.

Keywords: Acetabular; Morphology; Trochlear dysplasia.

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Figures

Fig. 1
Fig. 1
(diagrammatic representation) and (corresponding CT image). AASA is the angle between the anterior acetabular margin (B), the centre of the femoral head, and the intercapital centre line (A). PASA is the angle between the posterior acetabular margin (C), the centre of the femoral head and the intercapital centre line (A). 50–60° is usually taken as normal for the AASA, 90–100° for PASA.
Fig. 2
Fig. 2
The four types of trochlear groove dysplastic morphology as described by Dejour et al.: diagrammatic representation and CT image. N- Normal. Type A- Normal trochlear groove shape, but with a shallow sulcus angle more than 145°. Type B- Flattened trochlear groove. Type C- High lateral trochlear facet with a hypoplastic medial facet. Type D- Features of type C along with a prominent convex bone protrusion-so called 'cliff' pattern.
See this image and copyright information in PMC

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