Robb J E, Rymaszewski L A, Bentley H B, Donnan P T
Princess Margaret Rose Orthopaedic Hospital, Edinburgh, United Kingdom.
Surg Radiol Anat. 1991;13(3):181-5. doi: 10.1007/BF01627982.
This study investigated the effect of tilt and observer reliability on radiographic measurements of the position of a prosthetic acetabular cup in seven dry bone pelves using the teardrop as a landmark. Coronal or sagittal tilt of more than five degrees was easily recognisable and there was effectively no observer variation in the measurements up to this limit. In addition, 90 out of 100 randomly selected antero-posterior pelvic radiographs from an outpatient department were not significantly rotated and 93 demonstrated a clearly defined teardrop. Measurements about the teardrop on routine radiographs are therefore sufficiently accurate to allow assessment of prosthetic position.
本研究使用泪滴作为标志，调查了倾斜度和观察者可靠性对七个干燥骨盆中人工髋臼杯位置的X线测量结果的影响。超过五度的冠状面或矢状面倾斜很容易识别，在达到此限度之前测量中实际上不存在观察者差异。此外，从门诊部随机抽取的100张前后位骨盆X线片中，有90张没有明显旋转，93张显示泪滴清晰可辨。因此，常规X线片上关于泪滴的测量足够准确，能够对假体位置进行评估。
