The study of stress radiograph in the evaluation of trapeziometacarpal joint laxity
ZHANG Bei, HAN Shi-Lian
Chinese Journal of Clinical Anatomy ›› 2013, Vol. 31 ›› Issue (2) : 158-160.
The study of stress radiograph in the evaluation of trapeziometacarpal joint laxity
Objective Modified stress-positioned radiograph technique was used to measure carpometacarpal joint laxity with its consistence evaluated. Method Stress -positioned radiographs were obtained from 66 patients whose carpometacarpal joint had no trauma, arthritis and surgeric history. Two measurements were performed by two hand surgeons: the width of radial subluxation of the first metacarpal base and the width of the first metacarpal articular surface; the ratio between them was calculated. T-test were performed to assess the reliability and difference between male and female. Result The average of the RS measurement is (4.27±1.83) mm (range 1~8mm)and the AW measurement is (13.52±1.89)mm (range 10~17.3 mm). The average RS/AW subluxation ratio is (0.32±0.11). Women showed greater value of the ratio than men（P=0.026）. The measurements of two hand surgeon showed high consistence (P=0.23). Conclusion The stress-positioned radiograph could evaluate joint laxity of the trapeziometacarpal articulation with high consistence.
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