The Journal of Bone and Joint Surgery, Vol 57, Issue 3 332-336, Copyright © 1975 by Journal of Bone and Joint Surgery, Inc
Avascular necrosis of the proximal end of the dens. A complication of halo-pelvic distraction
SJ Tredwell and JP O'Brien
Roentgenographic evidence of avascular necrosis of the upper part of the
dens was observed in thirteen of ninety-four patients treated for
tuberculous kyphosis or non-tuberculous scoliosis using halo-pelvic
distraction. Four patients had some residual loss of motion. A significant
relationship was demonstrated between avascular necrosis and the amount of
distraction visible on roentgenograms.