Is Facet Tropism Associated with Increased Risk of Disc Herniation in the Lumbar Spine?
Study Design Retrospective case control study. Purpose In current study, we compared the incidence of facet tropism (FT) in patients with lumbar disc herniation and normal controls. Overview of Literature It has been suggested that FT can be associated with increased risk of lumbar disc herniation....
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Korean Spine Society
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doaj-a612e398413742e387e2ba0948f0ba592020-11-25T01:39:10ZengKorean Spine SocietyAsian Spine Journal1976-19021976-78462018-06-0112342843310.4184/asj.2018.12.3.428888Is Facet Tropism Associated with Increased Risk of Disc Herniation in the Lumbar Spine?Hassan Ghandhari0Ebrahim Ameri1Habib Hasani2Mir Bahram Safari3Ali Tabrizi4 Bone and Joint Reconstruction Research Center, Shafa Orthopedic Teaching Hospital, Iran University of Medical Sciences, Tehran, Iran Bone and Joint Reconstruction Research Center, Shafa Orthopedic Teaching Hospital, Iran University of Medical Sciences, Tehran, Iran Bone and Joint Reconstruction Research Center, Shafa Orthopedic Teaching Hospital, Iran University of Medical Sciences, Tehran, Iran Department of Orthopedics, Imam Khomeini Hospital, Urmia University of Medical Sciences, Urmia, Iran Department of Orthopedics, Imam Khomeini Hospital, Urmia University of Medical Sciences, Urmia, IranStudy Design Retrospective case control study. Purpose In current study, we compared the incidence of facet tropism (FT) in patients with lumbar disc herniation and normal controls. Overview of Literature It has been suggested that FT can be associated with increased risk of lumbar disc herniation. Methods A total of 66 and 63 patients with L4/L5 and L5/S1 disc herniation, respectively, were evaluated in the present study. The control group comprised 61 normal subjects. Facet joint angle was measured using axial magnetic resonance images. The FT was defined as a difference of >10° between the right and left facet joints. The incidence of FT was compared between patients and controls. We also investigated the relationship between facet orientation (sagittal or coronal) and side of disc herniation. Results The incidence of FT at the L4/L5 level was significantly higher in patients with disc herniation (48.5% vs. 26.2%, p =0.01), while it was found to be the same at the L5/S1 level in patients and controls (50.8% vs. 36%, p =0.098). Among the 64 patients with FT, intervertebral disc herniation occurred significantly toward the more sagittally oriented facet joint in 41 patients (p <0.05). Conclusions FT is associated with increased risk of L4/L5 intervertebral disc herniation, but not at the L5/S1 level. In addition, disc herniation occurred toward the more sagittally oriented facet joint.http://www.asianspinejournal.org/upload/pdf/asj-2018-12-3-428.pdfFacet joint orientationIntervertebral discBiomechanical phenomenaTropism |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Hassan Ghandhari Ebrahim Ameri Habib Hasani Mir Bahram Safari Ali Tabrizi |
spellingShingle |
Hassan Ghandhari Ebrahim Ameri Habib Hasani Mir Bahram Safari Ali Tabrizi Is Facet Tropism Associated with Increased Risk of Disc Herniation in the Lumbar Spine? Asian Spine Journal Facet joint orientation Intervertebral disc Biomechanical phenomena Tropism |
author_facet |
Hassan Ghandhari Ebrahim Ameri Habib Hasani Mir Bahram Safari Ali Tabrizi |
author_sort |
Hassan Ghandhari |
title |
Is Facet Tropism Associated with Increased Risk of Disc Herniation in the Lumbar Spine? |
title_short |
Is Facet Tropism Associated with Increased Risk of Disc Herniation in the Lumbar Spine? |
title_full |
Is Facet Tropism Associated with Increased Risk of Disc Herniation in the Lumbar Spine? |
title_fullStr |
Is Facet Tropism Associated with Increased Risk of Disc Herniation in the Lumbar Spine? |
title_full_unstemmed |
Is Facet Tropism Associated with Increased Risk of Disc Herniation in the Lumbar Spine? |
title_sort |
is facet tropism associated with increased risk of disc herniation in the lumbar spine? |
publisher |
Korean Spine Society |
series |
Asian Spine Journal |
issn |
1976-1902 1976-7846 |
publishDate |
2018-06-01 |
description |
Study Design Retrospective case control study. Purpose In current study, we compared the incidence of facet tropism (FT) in patients with lumbar disc herniation and normal controls. Overview of Literature It has been suggested that FT can be associated with increased risk of lumbar disc herniation. Methods A total of 66 and 63 patients with L4/L5 and L5/S1 disc herniation, respectively, were evaluated in the present study. The control group comprised 61 normal subjects. Facet joint angle was measured using axial magnetic resonance images. The FT was defined as a difference of >10° between the right and left facet joints. The incidence of FT was compared between patients and controls. We also investigated the relationship between facet orientation (sagittal or coronal) and side of disc herniation. Results The incidence of FT at the L4/L5 level was significantly higher in patients with disc herniation (48.5% vs. 26.2%, p =0.01), while it was found to be the same at the L5/S1 level in patients and controls (50.8% vs. 36%, p =0.098). Among the 64 patients with FT, intervertebral disc herniation occurred significantly toward the more sagittally oriented facet joint in 41 patients (p <0.05). Conclusions FT is associated with increased risk of L4/L5 intervertebral disc herniation, but not at the L5/S1 level. In addition, disc herniation occurred toward the more sagittally oriented facet joint. |
topic |
Facet joint orientation Intervertebral disc Biomechanical phenomena Tropism |
url |
http://www.asianspinejournal.org/upload/pdf/asj-2018-12-3-428.pdf |
work_keys_str_mv |
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