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The Journal of Bone and Joint Surgery, Vol 59, Issue 1 54-56, Copyright © 1977 by Journal of Bone and Joint Surgery, Inc

JOURNAL CONTENTS

Fixation of Dwyer screws for the treatment of scoliosis. A postmortem study

HK Dunn and KE Bolstad

The strength of fixation of Dwyer screws in seven or eight vertebral bodies in each of six fresh osteoporotic cadavera was measured under the following conditions: with fixation with only the screw; with the staple-screw combination; with each of these modes of fixation combined with polymethylmethacrylate placed in the hole prior to insertion of the screw; and with the screw reinserted after failure and filling the hole with methacrylate. The strength of fixation of the screw-staple combination was increased almost twofold by the methacrylate, and after failure followed by reinsertion of the screw embedding it in methacrylate, strong fixation was restored.
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