Department of Hand Surgery, Shafa Yahyaian Rehabilitation Center, Tehran University of Medical Sciences, Tehran, Iran.
Arch Iran Med. 2013 May;16(5):301-2.
Negative ulnar variance can be a risk factor in Kienböck's disease, wrist instability, and scaphoid bone fracture. This study focused on the ulnar variance in wrists with scaphoid bone nonunion.
We retrospectively reviewed posteroanterior wrist radiographs of 65 patients who were diagnosed as established scaphoid nonunion and underwent open reduction and bone grafting between 2005 and 2010. We used reference radiographs from contralateral wrists of 65 consecutive skeletally- mature patients with distal radius fracture as the control group and then measured ulnar variance and compared it in both groups.
Ulnar variance was measured in standard posteroanterior wrist X-rays of 65 scaphoid nonunion and 65 normal controls. Twenty five patients (38.5%) in the scaphoid nonunion group had negative ulnar variance, and the mean value was -0.26 (± 1.24) mm (range: -3, +2). In the control group, 15 subjects (23.1 %) had an ulnar minus wrist, and the mean ulnar variance was + 0.54 (± 1.47) mm (range: -3, +4) .The difference in ulnar variance was significant between the two groups (P-value = 0.001).
Ulnar variance may influence developing of nonunion process in scaphoid bone fracture.
尺骨负变异可能是月骨骨软骨病、腕不稳定和舟状骨骨折的危险因素。本研究关注的是舟状骨骨不连腕关节的尺骨变异。
我们回顾性分析了 2005 年至 2010 年间诊断为舟状骨骨不连并接受切开复位植骨的 65 例患者的前后位腕关节 X 线片。我们使用 65 例连续尺骨远端骨折的对侧腕关节的参考 X 线片作为对照组，并测量了尺骨变异，并在两组之间进行了比较。
在 65 例舟状骨骨不连和 65 例正常对照组的标准前后位腕关节 X 线片中测量了尺骨变异。在舟状骨骨不连组中，25 例（38.5%）患者有尺骨负变异，平均为-0.26（±1.24）mm（范围：-3，+2）。在对照组中，15 例（23.1%）患者有尺骨腕负变异，平均尺骨变异为+0.54（±1.47）mm（范围：-3，+4）。两组间尺骨变异差异有统计学意义（P 值=0.001）。
尺骨变异可能影响舟状骨骨折不愈合过程的发展。
