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Journal of Bone and Joint Surgery - British Volume, Vol 88-B, Issue 10, 1327-1330.
doi: 10.1302/0301-620X.88B1017793  
Copyright © 2006 by British Editorial Society of Bone and Joint Surgery
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Evaluation of the flexion gap by axial radiography of the distal femur

Y. Tokuhara, MD, Orthopaedic Surgeon1; Y. Kadoya, MD, Chief of Adult Knee Reconstruction2; K. Kanekasu, MD, Chief of Adult Knee Reconstruction3; M. Kondo, MD, Chief of Adult Knee Reconstruction4; A. Kobayashi, MD, Lecturer1; and K. Takaoka, MD, Professor1

1 Department of Orthopaedic Surgery, Osaka City University Medical School, 1-4-3 Asahimachi, Abeno-ku, Osaka City, Osaka 545-8585 Japan.
2 Department of Orthopaedic Surgery, Osaka Rosai Hospital, 1179-3, Nagasone-cho, Sakai City, Osaka 591-8025 Japan.
3 Rheumatoid Arthritis Center, Saiseikai Takaoka Hospital, 387-1 Futatsuka, Takaoka City, Toyama 933-0816 Japan.
4 Department of Orthopaedic Surgery, Kashiba Asahigaoka Hospital, 834-3 Kaminaka, Kashiba City, Nara 639-0265 Japan.

Correspondence should be sent to Dr Y. Kadoya; e-mail: kadoya{at}orh.go.jp

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° (1.5° to 6.3°) compared with that obtained by MRI of 5.1° (2.6° to 9.5°), a mean discrepancy of 1.49°. 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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The variation in medial and lateral collateral ligament strain and tibiofemoral forces following changes in the flexion and extension gaps in total knee replacement: A LABORATORY EXPERIMENT USING CADAVER KNEES
J Bone Joint Surg Br, November 1, 2007; 89-B(11): 1528 - 1533.
[Abstract] [Full Text] [PDF]


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Hip, Knee, Trauma, Upper limb, Foot & Ankle, Paediatrics, Oncology, Spine, Arthroplasty, General