J Korean Soc Spine Surg. 2014 Dec;21(4):139-145. Korean.
Published online Dec 31, 2014.
© Copyright 2014 Korean Society of Spine Surgery
Original Article

The Analysis of the Outcome of Short- and Long-Segment Posterior Instrumentation for Thoracolumbar Bursting Fractures

Woo Chul Kim, M.D., Kyu Yeol Lee, M.D., Lih Wang, M.D., Young Hoon Lim, M.D., Jung Mo Kang, M.D. and Hyun Su Do, M.D.
    • 1Department of Orthopedic Surgery, College of Medicine, Dong-A University, Busan, Korea.
    • 2Department of Orthopedic Surgery, Busan Bumin Hospital, Busan, Korea.
Received December 16, 2013; Revised January 24, 2014; Accepted November 28, 2014.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Study Design

A retrospective study.

Summary of the Literature Review

The reports comparing short- and long-segment instrumentation are insufficient.

Objectives

To determine the postoperative results and to analyze relative factors affecting results between short- and long-segment instrumentation in thoracolumbar fractures.

Materials and Methods

From March 2006 to March 2012, 97 patients with thoracolumbar fracture were treated with posterior instrumentation. They were divided into 2 groups, the short- (Group I) and long-segment groups (Group II). To analyze factors affecting results, several factors including age, anterior column height (ACH), and the kyphotic angle were reviewed. For radiologic evaluation, postoperative and follow-up radiographs were evaluated by measuring the kyphotic angle and ACH. Additionally, the presence of complications was reviewed.

Results

Groups I and II consisted of 45, 52 cases and had mean ages of 50.3, 55.8 years, respectively. In Group I, the ACH increased from 44.2% to 75.3% postoperatively, and remained 72.8% at follow-up. The kyphotic angle decreased from 19.4° to 10.6° postoperatively, and remained at 12.8° at follow-up. In Group II, the ACH recovered from 41.6% to 76.4% postoperatively, and was 74.8% at follow-up. The kyphotic angle decreased from 21.6° to 12.6° postoperatively, and was 13.9° at follow-up. The canal compromise, age, and comminution were not directly related with results. However, the mean age of the 7 cases showing complications was 72 years, and the 7 cases had severe comminuted fractures.

Conclusions

The short- and long-segment instrumentations of thoracolumbar fractures are not significantly different with respect to the results attained. However, in order to decrease complications, we should pay attention to age and fracture comminution.

Keywords
Thoraolumbar; Burst fracture; Pedicle screw; Long segment; Short segment

Figures

Fig. 1
A 60-year-old female patient with L1 burst fracture treated by short segment pedicle screw fixation. (A) Preoperative X-ray (B) Postoperative X-ray (C) Preoperative CT scan.

Fig. 2
A 31-year-old female patient with T12 burst fracture treated by long segment pedicle screw fixation. (A) Preoperative X-ray (B) Postoperative X-ray (C) Preoperative CT A B scan.

Tables

Table 1
Analysis of postoperative results between short and long segment screw fixation groups

Table 2
Risk factors in patients showing complications

Table 3
Univariate Logistic regression analysis of risk factors in patients showing complications

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