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Comparative Study
. 2006 Oct;88(10):1327-30.
doi: 10.1302/0301-620X.88B10.17793.

Evaluation of the flexion gap by axial radiography of the distal femur

Y Tokuhara  1 , Y Kadoya, K Kanekasu, M Kondo, A Kobayashi, K Takaoka
Affiliations
Comparative Study

Evaluation of the flexion gap by axial radiography of the distal femur

Y Tokuhara et al. J Bone Joint Surg Br. 2006 Oct.

Abstract

The shape of the flexion gap in 20 normal knees was evaluated by axial radiography of the distal femur, and the results compared with those obtained in a previous study by MRI. The observed asymmetry was reduced by 29% using radiography, with a mean value of 3.6 degrees (1.5 degrees to 6.3 degrees) compared with that obtained by MRI of 5.1 degrees (2.6 degrees to 9.5 degrees), a mean discrepancy of 1.49 degrees. The results obtained by radiography and MRI showed a strong correlation (r = 0.78). Axial radiography is acceptable for the evaluation of the flexion gap and is less expensive and more comfortable to perform than MRI. Additionally, no metallic artefact occurs when the radiological method is used for assessment after arthroplasty.

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