DiBenedetto M R, Lubbers L M, Coleman C R
Hand and Microsurgery Center, Riverside Methodist Hospitals, Columbus, Ohio.
J Hand Surg Am. 1991 Jan;16(1):36-9. doi: 10.1016/s0363-5023(10)80009-7.
Fifty wrists (thirty-two patients) with rheumatoid arthritis and ulnar drift of the fingers were examined radiologically and compared to fifty normal wrists radiographs. Statistically significant differences were found for measurements of radial inclination angle, carpal-radial distance, third metacarpal-phalangeal angle, and carpal height ratio. Third metacarpal-phalangeal angle of ten degrees or greater on standard posteroanterior radiograph appears to accurately represent digital ulnar drift. Elevated radial inclination angle was highly correlated with digital ulnar drift (p much less than 0.001). Radial inclination angle greater than twenty-two degrees is associated with the development of digital ulnar drift through two mechanisms, radial carpal rotation, and ulnar carpal translocation.
对50例患有类风湿性关节炎且手指尺侧偏移的手腕（32名患者）进行了放射学检查，并与50张正常手腕的X线片进行比较。在桡骨倾斜角、腕-桡侧距离、第三掌指关节角和腕高比的测量中发现了具有统计学意义的差异。标准正位X线片上第三掌指关节角为10度或更大似乎能准确代表手指尺侧偏移。桡骨倾斜角升高与手指尺侧偏移高度相关（p远小于0.001）。大于22度的桡骨倾斜角通过两种机制与手指尺侧偏移的发生相关，即桡侧腕骨旋转和尺侧腕骨移位。
