Study Design: A retrospective case-control study.
Objective: To clarify associations between both lamina horizontalization and facet tropism and adjacent segment degeneration (ASD).
Summary Of Background Data: We have previously reported coexistence of lamina horizontalization and facet tropism adjacent to the cranial fusion segment as risk factors for ASD.
Methods: Subjects comprised 20 patients who underwent additional surgery for ASD after L4/5 posterior lumbar interbody fusion (PLIF) for L4 degenerative spondylolisthesis. Patients who underwent additional surgery for ASD (ASD group) were divided into 2 groups according to the duration until additional surgery: early group (n = 13), additional surgery < or =3 years after primary surgery; and late group (n = 7), additional surgery >3 years after primary surgery. As a control group, 20 age- and sex-matched patients who underwent L4/5 PLIF and could be followed for > or =5 years without ASD were selected. Lamina inclination angle at L3 and facet tropism at L3/4 in each group were measured 3 times by 3 individuals blinded to clinical results. Associations between clinical results and these risk factors and influences of these factors for periods up to the occurrence of ASD were investigated.
Results: All ASD was observed in the cranial adjacent segment and the most common condition at additional surgery was spondylolisthesis (n = 15, 75%). Lamina inclination angle was significantly higher in the ASD group than in the control group. ASD was observed in 86% of patients with lamina inclination >130 degrees . In addition, facet tropism was more significant in the early group than in the late and control groups. ASD was observed < or =3 years after primary surgery in all patients with both lamina inclination >130 degrees and facet tropism >10 degrees .
Conclusion: Preexisting lamina horizontalization at the cranial fusion segment seems to affect ASD, and coexistence of lamina horizontalization and facet tropism seems to accelerate ASD after PLIF.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1097/BRS.0b013e31817bb9c2 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Is There a Relation Between High Pelvic Incidence and Sagittal Angle of Posterior Lumbar Facets?
World Neurosurg
December 2024
Spine Unit, Orthopedic Department, Hotel Dieu de France Hospital, Beirut, Lebanon; School of Medicine, Saint Joseph University, Beirut, Lebanon.
Article Synopsis
- Recent studies indicate a correlation between pelvic incidence (PI) and spondylolisthesis, but no research has explored the link between facet sagittal angle and spinopelvic parameters like PI in healthy individuals.
- Abdominopelvic CT scans were reviewed from patients under 40 with no spinal issues, focusing on spinopelvic parameters and facet angles at different lumbar levels.
- The study found a significant association between facet sagittal angle and increased PI at the L5-S1 level, suggesting that PI is related to other risk factors like facet tropism and female gender, which could lead to spinal instability and related conditions.
A comparative study of the effect of facet tropism on the index-level kinematics and biomechanics after artificial cervical disc replacement (ACDR) with Prestige LP, Prodisc-C vivo, and Mobi-C: a finite element study.
J Orthop Surg Res
October 2024
Department of Orthopedics, Orthopedic Research Institute, West China Hospital, Sichuan University, Chengdu, China.
Introduction: Artificial cervical disc replacement (ACDR) is a widely accepted surgical procedure in the treatment of cervical radiculopathy and myelopathy. However, some research suggests that ACDR may redistribute more load onto the facet joints, potentially leading to postoperative axial pain in certain patients. Earlier studies have indicated that facet tropism is prevalent in the lower cervical spine and can significantly increase facet joint pressure.
View Article and Find Full Text PDFCorrelations Between Facet Tropism, Joint Mobility and Degree of Displacement in Patients with Low Grade Spondylolisthesis.
Turk Neurosurg
November 2024
University of São Paulo, University Hospital of Ribeirão Preto Medical School, Division of Neurosurgery, Brazil.
Aim: To compare lumbar X-ray and magnetic resonance imaging (MRI) findings, and to identify the factors associated with joint instability in cases with lumbar spondylolisthesis.
Material And Methods: We performed a retrospective and observational study of patients with a confirmed diagnosis of lumbar or lumbosacral low-grade spondylolisthesis at a single level. Preoperative X-ray and MRI examinations were evaluated.
Combined effect of artificial cervical disc replacement and facet tropism on the index-level facet joints: a finite element study.
BMC Musculoskelet Disord
October 2024
Department of Orthopedics, Orthopedic Research Institute, West China Hospital, Sichuan University, Chengdu, China.
Background: Artificial Cervical Disc Replacement (ACDR) is an effective treatment for cervical degenerative disc diseases. However, clinical information regarding the facet joint alterations after ACDR was limited. Facet tropism is common in the sub-axial cervical spine.
View Article and Find Full Text PDFMechanical influence of facet tropism in patients with chronic discogenic pain disorder.
Bone Joint Res
September 2024
Department of Physical Medicine and Rehabilitation, Korea University Guro Hospital, Seoul, South Korea.
Article Synopsis
- The study evaluated how facet tropism (an abnormal curvature of spinal joints) affects chronic lumbosacral disc pain by analyzing clinical data and computer simulations (FEM).
- A retrospective analysis of 318 spinal levels in 156 patients revealed that facet tropism significantly predicts positive outcomes in discography, with notable biomechanical impacts on disc stress and displacement in affected areas.
- The results suggest that facet tropism can lead to higher risks of disc herniation and degeneration due to changes in pressure and increased mechanical stress on the discs.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!