Miyake J, Murase T, Yamanaka Y, Moritomo H, Sugamoto K, Yoshikawa H
Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, Osaka, Japan.
J Hand Surg Eur Vol. 2013 Feb;38(2):133-43. doi: 10.1177/1753193412451383. Epub 2012 Jun 26.
To estimate the accuracy of radiographic deformity evaluation for distal radius malunion, we compared the results obtained from radiographic measurements (palmar tilt, radial angle, and ulnar variance) with those from the three-dimensional (3D) method using computer bone models in 20 dorsally tilted malunions. Dorsal tilt deformity, radial tilt deformity, and shortening deformity were calculated using the unaffected side as a reference. The 3D method showed a slightly lower value for dorsal tilt deformity than the radiographic evaluation, but the difference was < 10° in all cases. In patients with dorsal tilt ≥ 40°, notable differences in radial tilt evaluation were observed between the two methods compared with patients with less dorsal tilt. The 3D shortening showed positive correlations with radiographic evaluation, but a discrepancy of ≥ 2 mm was observed in eight cases. Palmar tilt is reliable for surgical planning, but radial angle and ulnar variance may be less accurate than previously thought.
为评估桡骨远端畸形愈合的X线畸形评估准确性，我们在20例背倾畸形愈合病例中，将X线测量（掌倾角、桡骨角和尺骨变异）结果与使用计算机骨模型的三维（3D）方法结果进行了比较。以未受影响侧为参照计算背倾畸形、桡倾畸形和短缩畸形。3D方法显示背倾畸形的值略低于X线评估，但所有病例差异均<10°。在背倾≥40°的患者中，与背倾较小的患者相比，两种方法在桡倾评估上观察到显著差异。3D短缩与X线评估呈正相关，但8例中观察到≥2 mm的差异。掌倾角对手术规划可靠，但桡骨角和尺骨变异可能不如先前认为的准确。
