Analysis of the Risk Factors for Posterior Migration of Single Cage after Transforminal Lumbar Interbody Fusion
10.4055/jkoa.2019.54.3.237
- Author:
Young Chul KO
1
;
Dong Jun HA
;
Man Jun PARK
;
Jung Wook HUH
;
Joon Hyung PARK
;
Woo Myung LEE
Author Information
1. Department of Orthopedic Surgery, Busan Medical Center, Busan, Korea. mmomjjang@naver.com
- Publication Type:Original Article
- Keywords:
transforminal lumbar interbody fusion;
single cage;
posterior migration;
risk factor
- MeSH:
Demography;
Humans;
Medical Records;
Retrospective Studies;
Risk Factors
- From:The Journal of the Korean Orthopaedic Association
2019;54(3):237-243
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
PURPOSE: To analyze the risk factors for posterior migration of a single cage after transforminal lumbar interbody fusion (TLIF). MATERIALS AND METHODS: This study was conducted retrospectively on 48 patients (60 discs) who were followed-up for 1 year after TLIF from January 2015 to January 2017. The patients were divided into two groups: group 1 containing 16 patients (17 discs) with cage migration and group 2 containing 32 patients (43 discs) without it. Information related to cage migration, such as the demographic factors, shape of disc, level and location of the cage inserted, and disc height change, was acquired from the medical records and radiologic images, and the possibility for generating posterior migration of cage was evaluated statistically. RESULTS: The demographic factors and cage-inserted level were similar in the two groups (16 patients in group 1, 32 patients in group 2). In the migration group, number of patients with a pear-type disc, 9 patients, was significantly larger; the disc height change, 1.8 mm, was significantly smaller; and the cage was located frequently on non-center in the anteriorposterior view and center in the lateral view in 9 and 15 out of 16 patients, respectively. CONCLUSION: A pear-type disc shape, small disc height change, cage with non-center on the anteriorposterior view and non-anterior on the lateral view are the risk factors for posterior migration. These factors are important for preventing posterior migration of the cage.
