Copyright © 2020 The Authors. Published by The Journal of Bone and Joint Surgery, Incorporated.
GAUTIER ET AL.
EPIPHYSEAL ANGULATION AND RELATED SPATIAL ORIENTATION IN SLIPPED CAPITAL FEMORAL EPIPHYSIS.THEORETICAL
MODEL AND BIOMECHANICAL EXPLANATION OF VARUS AND VALGUS SLIP
http://dx.doi.org/10.2106/JBJS.OA.20.00099 Page1
The following content was supplied by the authors as supporting material and has not been copy-edited or verified by JBJS.
Measure the epiphyseal obliquity on the anteroposterior (angle α) and the axial (angle β) radiographs and insert the values in the cells B2 and B3, respectively.
A value of 0° for the angle α is not allowed, because in line 9 b/a results in division by zero; instead, enter 0.00001). A value of 90° for the angle α is possible, but keep in mind that tan90° = ± ∞.
The obliquity angle η, spatial angle θ, and the absolute (in degrees) and relative errors (in percent) are calculated and indicated in cells B12 to B15.
