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Acta Neurochirurgica
Published in: Acta Neurochirurgica 5/2016

01-05-2016 | Clinical Article - Spine

Modified iliac screw fixation: technique and clinical application

Authors: Seil Sohn, Chun Kee Chung, Yongjung Jay Kim, Chi Heon Kim, Sung Bae Park, Hyejin Kim

Published in: Acta Neurochirurgica | Issue 5/2016

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Abstract

Background

A conventional iliac bolt and the S2 alar iliac screw fixation technique (S2AI) are commonly used sacropelvic fixation techniques. However, conventional iliac bolt technique requires a lateral connector and commonly has prominent screw head problems. S2AI reportedly has a high instrument failure rate. We aim to introduce a modified iliac screw fixation technique and to investigate its clinical application in adult patients.

Methods

The entrance site of the modified iliac screw fixation technique was 1 cm medial and 1 cm caudal from the posterosuperior iliac spine. From 2009 to 2015, ten adult patients underwent sacropelvic fixation with the modified iliac screw fixation technique in our spine clinic. A minimum 12-month clinical and radiographic follow-up was adopted. The mean follow-up period was 30.7 months (12–74 months). Mean number of fixation levels was 7.7 segments (5–10 segments).

Results

Postoperatively, the C7 plumb line (SVA) was significantly decreased (P = 0.04). Upon the last X-ray, SVA did not differ between postoperative and the last X-ray (P = 0.1). There was no breakage during our follow-up period. There was no prominent screw head. There were no cases requiring implant removal.

Conclusions

The modified iliac screw fixation technique does not cause prominence in the sacral region, and does not require a lateral connector, both of which are necessary when using the classical iliac bolt technique. This technique also avoids the acute angle between the screw head and the shaft of the screw commonly seen in S2AI. The modified iliac screw fixation technique can be an effective alternative for sacropelvic fixation.
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Metadata
Title
Modified iliac screw fixation: technique and clinical application
Authors
Seil Sohn
Chun Kee Chung
Yongjung Jay Kim
Chi Heon Kim
Sung Bae Park
Hyejin Kim
Publication date
01-05-2016
Publisher
Springer Vienna
Published in
Acta Neurochirurgica / Issue 5/2016
Print ISSN: 0001-6268
Electronic ISSN: 0942-0940
DOI
https://doi.org/10.1007/s00701-016-2772-x

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