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Journal of the Korean Society for Surgery of the Hand 2012;17(3):124-129.
Published online September 1, 2012.
Carpal Alignment Evaluation Using Three-dimensional Computed Tomography
Ki Won Lee, Jae Seok Song, Young Joon Choi, Wan Jong Cho, Ho Youn Park
1Department of Orthopaedic Surgery, Gangneung Asan Hospital, Ulsan University College of Medicine, Gangneung, Korea.
2Department of Preventive Medicine, Kwandong University College of Medicine, Gangneung, Korea. songjs@kd.ac.kr
3Department of Orthopaedic Surgery, Asan Medical Center, Ulsan University College of Medicine, Seoul, Korea.
Received: 27 July 2012   • Revised: 5 September 2012   • Accepted: 11 September 2012
Abstract
Purpose
The purpose of this study was to analyze carpal alignment and evaluate the interobserver reliability of the several parameters using three-dimensional computed tomography (3D-CT) in normal Koreans. MATERIALS AND METHODS: The study included 42 wrists with no history of wrist pain or abnormality by physical examination. 3D-CT scanning was performed with each patient in zero position; the arm abduction against the trunk; the elbow flexed 90degrees; the forearm in neutral position using the stabilizing device. The three observers measured the carpal alignment parameters including distal radius articular angle, radiolunate angle, radioscaphoid angle, radiocapitate angle, radio-3rd metacarpal angle, scapholunate angle, lunocapitate angle, luno-3rd metacarpal angle.

Results
The mean distal radius articular anglewas 12.8degrees+/-2.6degrees, the mean radiolunate angle was 0.9degrees+/-4.6degrees, the radioscaphoid angle was 54.4degrees+/-5.3degrees, the mean radiocapitate angle was 1.7degrees+/-2.1degrees, the mean radio-3rd metacarpal angle was -1.2degrees+/-2.5degrees, the mean scapholunate angle was 53.4degrees+/-7.8degrees, the mean lunocapitate angle was 0.8degrees+/-4.7degrees and the mean luno-3rd metacarpal angle was -2.1degrees+/-5.0degrees. All parameters have excellent interobserver reliability.

Conclusion
The normal mean values and ranges of carpal alignment angles measured by using 3D-CT may be of assistance in the evaluation of carpal alignment in patients.
 
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