A New Radiologic Assessment Method in Supracondylar Fracture of the Humerus / 대한정형외과학회잡지

ABSTRACT

Cubitus varus deformity following supracondylar frscture of the humerus in children is one of the major complications. The angle between long axis of humeral shaft and the line formed by connecting lower margin of trochlea and capitellum has been described by authors as a new method of radiological assessment for the indirect measurement of carrying angle. From the author's retrospective radiological study in 115 normal children and 41 supracondylar fractured children, the results were as follows;1. In the 115 normal arms, the mean vslue of T-C angle was 1049±3.8° 2. In the 115 normal arms, a significant relationship was found between the Baumann angle and T-C angle. 3. In the 115 normal arms, a significant relationship was found between the Baumsnn angle and the Carrying angle. 4. In the 115 normal arms, a significant relationship was found between the T-C angle and the Carrying angle. 5. In the 41 injured arms, reliability test was performed for the excluding of effect of the environment. The results was that T-C angle was more reliable than Baumann angle as a indirect measurement method of the Carrying angle. From above results, it is suggested that T-C angle can be reliably used to predict the Carrying angle and prevent cubitus varus deformity in supracondylar fracture of humerus.