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Uncovertebral Joint

Kingsley R Chin, Fabio J R Pencle, Shannon D Francis, Chloe A Francis, Jason A Seale, Elijah A Hothem
BACKGROUND: In anterior cervical diskectomy and fusion (ACDF), misaligned plates are concerning because of the risk of screw-and-plate failure; however, these plates also hypothetically have the potential for asymmetric micromotion on the facet and uncovertebral joint. The aim of this study was to determine whether misaligned plate placement during ACDF had clinical benefits compared with straight plate placement. METHODS: Postoperative AP radiographs of 128 consecutive patients who underwent ACDF with anterior cervical plate (ACP) fixation were reviewed, and plate alignment was assessed...
May 2017: Journal of the American Academy of Orthopaedic Surgeons
H L Wang, L Jiang, F Z Lyu, X S Ma, X L Xia, J Y Jiang
Objectives: To study the relationship between the anatomical parameters of transverse foramen and intervertebral discs in the cross-section of the cervical spine in healthy adults, and to evaluate the risk of vertebral artery injury in the anterior cervical spine surgery. Methods: There were 24 healthy adults(12 male, 12 female) underwent neck CT angiography with clear vertebral artery and the adjacent structure imaging from June to December 2014 in Huashan Hospital, Fudan University. The anatomical parameters of vertebral artery V2 segment with lower cervical vertebrae and intervertebral discs were measured by cross-sectional images of C(3-6)...
March 1, 2017: Zhonghua Wai Ke za Zhi [Chinese Journal of Surgery]
Toshitaka Yoshii, Takashi Hirai, Tsuyoshi Yamada, Hiroyuki Inose, Tsuyoshi Kato, Kenichiro Sakai, Mitsuhiro Enomoto, Shigenori Kawabata, Yoshiyasu Arai, Atsushi Okawa
BACKGROUND: An anterior decompression and fusion (ADF) with the floating method is an effective procedure for treating ossification of the posterior longitudinal ligament (OPLL), allowing a direct decompressive effect on the spinal cord. However, the procedure is skill-intensive, particularly in cases of OPLL with a high canal-occupying ratio. In such cases, there are potential risks for insufficient decompression due to the incomplete floating of the OPLL. Here, we introduce an anterior decompression procedure for massive OPLL, using an intraoperative computed tomography (CT) with a mobile scanner gantry for the intraoperative evaluation of the decompression...
January 19, 2017: Journal of Orthopaedic Surgery and Research
Tsung-Hsi Tu, Chih-Chang Chang, Jau-Ching Wu, Li-Yu Fay, Wen-Cheng Huang, Henrich Cheng
The most commonly accepted indications for cervical disc arthroplasty (CDA) are 1- and 2-level cervical disc herniation or spondylosis causing radiculopathy or myelopathy that is refractory to medical management. Unlike anterior cervical discectomy and fusion (ACDF), which eliminates motion, CDA aims to restore the physiological range of motion of the indexed joint. Thus, the effect of indirect decompression gained by the insertion of a sufficiently large interbody graft and incorporation into arthrodesis after ACDF cannot be duplicated for CDA...
January 2017: Neurosurgical Focus
Wei Tian, Ming-Xing Fan, Ya-Jun Liu, Xiao Han, Kai Yan, Han Wang, Yan-Wei Lyu
OBJECTIVE: Cervical artificial disc replacement (CADR) is a new technology in cervical spine surgery. However, CADR may result in paravertebral ossification (PO) after surgery and affect the mobility of the related spinal segments. The present widely used assessment method based on X-ray tomography cannot provide the position information of PO, and also PO detection rates by X-ray are low. The incidence of PO varies dramatically between studies. This study built a novel classification system based on cervical computer tomography (CT) scan to re-evaluate the incidence of PO and its influence on CADR, and also analyzed the predisposing factors of PO...
November 2016: Orthopaedic Surgery
Jing Chen, Jia Li, Gang Qiu, Jingchao Wei, Yanfen Qiu, Yonghui An, Yong Shen
BACKGROUND: The purpose of this study was to investigate whether uncovertebral joint ossification was a risk factor for axial symptoms (AS) after cervical disc arthroplasty (CDA). METHODS: This retrospective study included 52 consecutive patients who underwent CDA for single-level cervical disc disease. To examine possible risk factors for AS after CDA, univariate and multivariate logistic regression analyses were conducted to compare data from the patients with and without AS (the AS and no-AS groups, respectively)...
September 20, 2016: Journal of Orthopaedic Surgery and Research
Zhong Wang, Hui Zhao, Ji-Ming Liu, Li-Wen Tan, Peng Liu, Jian-Hua Zhao
The uncovertebral joint (UJ) is an important load-bearing structure in the subaxial cervical spine (SCS) and the medial wall of the intervertebral foramen (IVF). To investigate the UJ׳s role in load distribution and transmission under physiological loading, we developed and validated a detailed finite element model (C2-T1). Based on the initial model, two additional models were modified to simulate surgical resection and degeneration of UJs, to evaluate their influence on SCS kinematics and load distribution...
September 6, 2016: Journal of Biomechanics
Zhengfeng Zhang, Chao Liu, Ziping Mu, Honggang Wang, Lei Shangguan, Chao Zhang, Jie Li, Wenjie Zheng
STUDY DESIGN: Technique report and case series. OBJECTIVE: The aim of this study was to develop a new surgical technique for anterior reduction in management of unilateral/bilateral facet dislocations and to report the results of 8 patients with successful outcomes associated with this approach. SUMMARY OF BACKGROUND DATA: The anterior-only surgical procedure, including discectomy, open reduction, fusion, and fixation, is a recommended approach in the treatment of cervical facet dislocations...
April 2016: Spine
Scott C Wagner, Peter M Formby, Daniel G Kang, Gregory S Van Blarcum, John P Cody, Robert W Tracey, Ronald A Lehman
BACKGROUND CONTEXT: There is very little literature examining optimal radiographic parameters for placement of cervical disc arthroplasty (CDA), nor is there substantial evidence evaluating the relationship between persistent postoperative neck pain and radiographic outcomes. PURPOSE: We set out to perform a single-center evaluation of the radiographic outcomes, including associated complications, of CDA. DESIGN: This is a retrospective review...
July 2016: Spine Journal: Official Journal of the North American Spine Society
Christelle Nguyen, Katherine Sanchez, Alexandra Roren, Clémence Palazzo, Laëtitia Falcou, Jean-Luc Drapé, François Rannou, Serge Poiraudeau, Marie-Martine Lefèvre-Colau
BACKGROUND: Cervical radiculopathy is most often related to foraminal stenosis due to osteoarthritic changes of the uncovertebral joints anteriorly or zygapophyseal joints posteriorly, rather than disc herniation. OBJECTIVES: To describe anatomical specificities of the degenerated cervical spine. METHODS: A critical narrative review was conducted. Articles were non-systematically selected and based on authors' expertise, self-knowledge, and reflective practice...
September 2016: Annals of Physical and Rehabilitation Medicine
Norimitsu Wakao, Mikinobu Takeuchi, Manabu Nishimura, K Daniel Riew, Mitsuhiro Kamiya, Atsuhiko Hirasawa, Shiro Imagama, Katsuhisa Kawanami, Kenta Murotani, Masakazu Takayasu
STUDY DESIGN: Observational study using a retrospective single-institute database. OBJECTIVE: To investigate the prevalence of a medial loop (ML) of the vertebral artery (VA) and internal carotid artery (ICA), which might be an anatomical risk factor for arterial injury in anterior cervical surgeries. SUMMARY OF BACKGROUND DATA: Anterior cervical spine surgeries are generally considered to be safe and effective. VA injury is one of the most serious complications during anterior procedures...
February 2016: Spine
Reina Yao, Stewart D McLachlin, Parham Rasoulinejad, Kevin R Gurr, Fawaz Siddiqi, Cynthia E Dunning, Christopher S Bailey
BACKGROUND CONTEXT: Anterior cervical discectomy and fusion with plating (ACDFP) is commonly used for the treatment of distractive-flexion cervical spine injuries. Despite the prevalence of ACDFP, there is little biomechanical evidence for graft height selection in the unstable trauma scenario. PURPOSE: This study aimed to investigate whether changes in graft height affect the kinematics of instrumented ACDFP C5-C6 motion segments in the context of varying degrees of simulated facet injuries...
April 2016: Spine Journal: Official Journal of the North American Spine Society
Jeffrey Hartman
INTRODUCTION: The uncinate process and its associated uncovertebral articulation are features unique to the cervical spine. This review examines the morphology of these unique structures with particular emphasis on the regional anatomy, development and clinical significance. MATERIALS AND METHODS: Five electronic databases were utilized in the literature search and additional relevant citations were retrieved from the references. A total of 74 citations were included for review...
April 2014: Clinical Anatomy
Drew A Bednar
Study Design Prospective observational cohort. Objective To document the accuracy of uncovertebral anatomic targeting in positioning cervical disc arthroplasty. Summary of Background Data Disc arthroplasty implants depend on midline placement for optimum mechanical function. Fluoroscopy is used to delineate the midline. Anatomic targeting from the uncovertebral joints in the neck may be adequate. We have investigated the efficacy of uncovertebral anatomic targeting for cervical disc arthroplasty. Methods Anatomic uncovertebral midline targeting for disc arthroplasty insertion was performed in 18 male (mean age 51 years, range 27 to 67) and 22 female (mean age 50, range 35 to 70) patients receiving a total of 59 implants over a 5-year period...
March 2012: Global Spine Journal
Sebastiaan Schelfaut, Skrallan Verhasselt, Karel Carpentier, Lieven Moke
STUDY DESIGN: A case report on rotational vertebral artery syndrome (RVAS) and surgical treatment. OBJECTIVE: To illustrate a safe treatment option of RVAS with diminished risk of iatrogenic damage to the vertebral artery. SUMMARY OF BACKGROUND DATA: RVAS is an uncommon cause of symptomatic transient vertebrobasilar insufficiency induced by physiological head rotation with temporary significant external compression of the dominant subaxial vertebral artery...
March 2015: Journal of Spinal Disorders & Techniques
Wei Wei, Shenhui Liao, Shiyuan Shi, Jun Fei, Yifan Wang, Chunyue Chen
In this study, we propose a finite element analysis of the complete cervical spine with straightened and normal physiological curvature by using a specially designed modelling system. An accurate finite element model is established to recommend plausible approaches to treatment of cervical spondylosis through the finite element analysis results. There are few reports of biomechanics influence of the straightened cervical curve. It is difficult to measure internal responses of cervical spine directly. However, the finite element method has been reported to have the capability to quantify both external and internal responses to mechanical loading, such as the strain and stress distribution of spinal components...
March 2013: Australasian Physical & Engineering Sciences in Medicine
Jian-Dong Yuan, Xin Chen, Cai-Long Liu, Fan Zhang
OBJECTIVE: To analyze the clinical and radiologic outcomes of bilateral uncovertebral joints resection and decompression in treating cervical spondylotic radiculopathy through anterior approach. METHODS: From January 2007 to December 2009, the clinical data of 56 patients with cervical spondylotic radiculopathy undergoing sugical treatment were retrospectively analyzed. There were 33 males and 23 females with an average age of (58.83 +/- 8.01) years (ranged 41 to 72)...
September 2012: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
Jason Koreckij, Hasham Alvi, Robert Gibly, Eric Pang, Wellington K Hsu
STUDY DESIGN: Retrospective cohort. OBJECTIVE: Define incidence of anomalous carotid vasculature and associated risk factors as pertains to the anterior approach. SUMMARY OF BACKGROUND DATA: The carotid artery system, including the common, internal, and external branches, is lateral to the foramen transversarium. If unrecognized, aberrancies in carotid vessel anatomy can lead to devastating complications. METHODS: A total of 1000 cervical magnetic resonance imagings were screened to localize the carotid artery respective to medial/lateral location of the vessel at each segment from C2-C3 to C6-C7 bilaterally...
January 15, 2013: Spine
Yukitaka Nagamoto, Takahiro Ishii, Motoki Iwasaki, Hironobu Sakaura, Hisao Moritomo, Takahito Fujimori, Masafumi Kashii, Tsuyoshi Murase, Hideki Yoshikawa, Kazuomi Sugamoto
OBJECT: The uncovertebral joints are peculiar but clinically important anatomical structures of the cervical vertebrae. In the aged or degenerative cervical spine, osteophytes arising from an uncovertebral joint can cause cervical radiculopathy, often necessitating decompression surgery. Although these joints are believed to bear some relationship to head rotation, how the uncovertebral joints work during head rotation remains unclear. The purpose of this study is to elucidate 3D motion of the uncovertebral joints during head rotation...
October 2012: Journal of Neurosurgery. Spine
Sang-Bong Chung, Johongir M Muradov, Sun-Ho Lee, Whan Eoh, Eun-Sang Kim
OBJECTIVES: The purpose of this study is to investigate the incidence of heterotopic ossification (HO) in the Bryan cervical arthroplasty group and to identify associations between preoperative factors and the development of HO. METHODS: We performed a retrospective review of clinical and radiological data on patients who underwent single-level cervical arthroplasty with Bryan prosthesis between January 2005 and September 2007. Patients were postoperatively followed-up at 1, 3, 6, 12 months and every year thereafter...
June 2012: Acta Neurochirurgica
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