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J Bone Joint Surg Br. 2008 Nov;90(11):1428-34. doi: 10.1302/0301-620X.90B11.20073.

Analysis of cover of the femoral head in normal and dysplastic hips: new CT-based technique.

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Charing Cross Hospital, Fulham Palace Road, London W6 8RF, UK.


We present a new CT-based method which measures cover of the femoral head in both normal and dysplastic hips and allows assessment of acetabular inclination and anteversion. A clear topographical image of the head with its covered area is generated. We studied 36 normal and 39 dysplastic hips. In the normal hips the mean cover was 73% (66% to 81%), whereas in the dysplastic group it was 51% (38% to 64%). The significant advantage of this technique is that it allows the measurements to be standardised with reference to a specific anatomical plane. When this is applied to assessing cover in surgery for dysplasia of the hip it gives a clearer understanding of where the corrected hip stands in relation to normal and allows accurate assessment of inclination and anteversion.

[Indexed for MEDLINE]

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