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https://www.readbyqxmd.com/read/29758964/the-effect-of-sitting-posture-on-the-loads-at-cervico-thoracic-and-lumbosacral-joints
#1
Yuri Kwon, Ji-Won Kim, Jae-Hoon Heo, Hyeong-Min Jeon, Eui-Bum Choi, Gwang-Moon Eom
BACKGROUND: The sitting in an awkward posture for a prolonged time may lead to spinal or musculoskeletal disease. It is important to investigate the joint loads at spine while sitting. OBJECTIVE: The purpose of this study was to investigate the joint moment and antero-posterior (AP) reaction force at cervico-thoracic and lumbosacral joint for various sitting postures. METHODS: Twenty healthy males participated in this study. Six sitting postures were defined from three spinal curvatures (slump, flat, and lordosis) and two arm postures (arms-on-chest and arms-forward)...
April 24, 2018: Technology and Health Care: Official Journal of the European Society for Engineering and Medicine
https://www.readbyqxmd.com/read/29735137/two-level-osteotomy-for-correcting-severe-ankylosing-spondylitis-kyphosis-radiologic-outcomes-of-different-osteotomy-position-selection-strategy-for-different-type-of-patients
#2
Chao Liu, Guoquan Zheng, Yue Guo, Kai Song, Xiangyu Tang, Xuesong Zhang, Zheng Wang, Yan Wang
OBJECTIVE: To report on the radiologic outcomes of different osteotomy position-selection strategies for a two-level osteotomy for correcting severe ankylosing spondylitis kyphosis. METHODS: From July 2009 to September 2016, a total of 46 patients in our department with severe ankylosing spondylitis kyphosis who underwent two-level pedicle subtraction osteotomy (PSO) were studied. Pre- and postoperative relevant parameters were recorded. The patients were divided into two types and further separated into four groups...
May 2018: Spine Deformity
https://www.readbyqxmd.com/read/29697601/lordosis-re-creation-in-tlif-and-plif-a-cadaveric-study-of-the-influence-of-surgical-bone-resection-and-cage-angle
#3
Peter A Robertson, William A Armstrong, Daniel L Woods, Jeremy J Rawlinson
STUDY DESIGN: Controlled cadaveric study of surgical technique in Transforaminal and Posterior Lumbar Interbody Fusion (TLIF & PLIF) OBJECTIVE.: To evaluate the contribution of surgical techniques and cage variables in lordosis re-creation in posterior interbody fusion (TLIF/PLIF). SUMMARY OF BACKGROUND DATA: The major contributors to lumbar lordosis are the lordotic lower lumbar discs. The pathologies requiring treatment with segmental fusion are frequently hypolordotic or kyphotic...
April 24, 2018: Spine
https://www.readbyqxmd.com/read/29687180/extremely-high-preoperative-c7-slope-limits-compensatory-cervical-lordosis-after-muscle-preserving-selective-laminectomy
#4
Satoshi Nori, Tateru Shiraishi, Ryoma Aoyama, Ken Ninomiya, Junichi Yamane, Kazuya Kitamura, Seiji Ueda
PURPOSE: A high C7 slope induces C2-C7 lordosis to compensate for cervical sagittal balance adjustments. A muscle-preserving selective laminectomy (SL) can maintain this compensation postoperatively. This study evaluated the effect of an extremely high C7 slope on C2-C7 lordotic compensation following SL. METHODS: This study enrolled 151 cervical compressive myelopathy patients who underwent SL. Lateral cervical spine radiographs were taken before surgery and during final follow-up...
April 23, 2018: European Spine Journal
https://www.readbyqxmd.com/read/29651312/increasing-postural-deformity-trends-and-body-mass-index-analysis-in-school-age-children
#5
Safet Kapo, Izet Rađo, Nusret Smajlović, Siniša Kovač, Munir Talović, Ivor Doder, Nedim Čović
Introduction: The aim of the study was to analyse the deviations of the body posture and to assess the occurrence of spine deformities. Additionally, Body Mass Index in school children was related to the trend in postural deformities for different age groups (5-8 years old, n=112; 9-11 years old, n=205; 12-14 years old, n=212) as part of the project "Spine Lab", granted from the European Commission IPA founds, investigating the importance of public health issues. Methods: Body posture was measured using Contemplas 3D software analyser, based on video image trajectory and BIA weight scale (Tanita BC 420)...
March 2018: Zdravstveno Varstvo
https://www.readbyqxmd.com/read/29643712/surgical-results-of-a-one-stage-combined-anterior-lumbosacral-fusion-and-posterior-percutaneous-pedicle-screw-fixation
#6
Chien-Yuan Huang, Kuang-Ting Yeh, Tzai-Chiu Yu, Ru-Ping Lee, Ing-Ho Chen, Cheng-Huan Peng, Kuan-Lin Liu, Jen-Hung Wang, Wen-Tien Wu
Objectives: Lumbosacral fusion through either an anterior or a posterior approach to achieve good lordosis and stability is always a challenging surgical operation and is often accompanied by a higher rate of pseudarthrosis than when other lumbar segments are involved. This study evaluated the clinical and radiological results of lumbosacral fusions achieved through a combined anterior and posterior approach. Materials and Methods: From June 2008 to 2012, 20 patients who had L5-S1 instability and stenosis were consecutively treated, first by anterior interbody fusion using an allogenous strut bone graft through the pararectus approach and then by posterior pedicle screw fixation...
January 2018: Ci Ji Yi Xue za Zhi, Tzu-chi Medical Journal
https://www.readbyqxmd.com/read/29594328/spinal-postural-changes-during-the-modified-matthiass-test-in-healthy-children-interday-and-interrater-reliability-of-dynamic-rasterstereographic-measurements
#7
Inke Marie Albertsen, Kristina Dettmann, Kornelia Babin, Ralf Stücker, Jan Schröder, Astrid Zech, Karsten Hollander
OBJECTIVE: The Matthiass test serves to identify postural insufficiencies by evaluating the sagittal posture but this subjective assessment may be responsible for different reports on the prevalence of postural insufficiencies in children. Previously, rasterstereography was used to objectify this clinical test. Until now, the coupling of the Matthiass test with rasterstereography has not yet been applied to children and the reliability is unknown; therefore, the objective of our study was to provide interday and interrater reliability of rasterstereographic measurements during dynamic (modified Matthiass test) and static trials (only interday) in healthy children...
March 28, 2018: Der Orthopäde
https://www.readbyqxmd.com/read/29584503/influence-of-morphological-variations-on-cervical-spine-segmental-responses-from-inertial-loading
#8
Jobin D John, Narayan Yoganandan, Mike W J Arun, G Saravana Kumar
OBJECTIVES: The objective of this study was to investigate the influence of morphological variations in osteoligamentous lower cervical spinal segment responses under postero-anterior inertial loading. METHODS: A parametric finite element model of the C5-C6 spinal segment was used to generate models. Variations in the vertebral body and facet depth (anteroposterior), posterior process length, intervertebral disc height, facet articular process height and slope, segment orientation ranging from lordotic to straight, and segment size were parameterized...
February 28, 2018: Traffic Injury Prevention
https://www.readbyqxmd.com/read/29575212/association-between-cervical-lordotic-curvature-and-cervical-muscle-cross-sectional-area-in-patients-with-loss-of-cervical-lordosis
#9
Seo Yeon Yoon, Hyun Im Moon, Sang Chul Lee, Na Lae Eun, Yong Wook Kim
Disruption of the cervical lordotic curve can cause undesirable symptoms such as neck pain, and cord compression. The purpose of this study was to investigate the biomechanics of loss of cervical lordosis by measuring the cross-sectional area (CSA) of the cervical muscles using magnetic resonance imaging (MRI), and to determine the relationship between cervical lordosis angle and cervical muscle status. The cervical lordosis angle was measured on standing lateral plain radiography using the posterior tangent technique in patients who complained of neck pain...
March 25, 2018: Clinical Anatomy
https://www.readbyqxmd.com/read/29572735/correlation-and-differences-in-cervical-sagittal-alignment-parameters-between-cervical-radiographs-and-magnetic-resonance-images
#10
Masahito Oshina, Masashi Tanaka, Yasushi Oshima, Sakae Tanaka, K Daniel Riew
PURPOSE: Although cervical alignment is better assessed using standing radiography than supine magnetic resonance imaging (MRI), few studies have investigated this. This study aimed to investigate the difference in alignment between standing radiographs and supine MRI images, and assess whether neck position affects the cervical parameters and neurological changes. METHODS: We analyzed 53 patients, measuring the O-C2 angle, C2-7 angle (the distinction between the lordotic and kyphotic groups), T1 slope, neck tilt, thoracic inlet angle, and the C2-7 sagittal vertical axis...
March 23, 2018: European Spine Journal
https://www.readbyqxmd.com/read/29559240/differences-in-3d-vs-2d-analysis-in-lumbar-spinal-fusion-simulations
#11
Hung-Wei Hsu, Maxim Bashkuev, Matthias Pumberger, Hendrik Schmidt
Lumbar interbody fusion is currently the gold standard in treating patients with disc degeneration or segmental instability. Despite it having been used for several decades, the non-union rate remains high. A failed fusion is frequently attributed to an inadequate mechanical environment after instrumentation. Finite element (FE) models can provide insights into the mechanics of the fusion process. Previous fusion simulations using FE models showed that the geometries and material of the cage can greatly influence the fusion outcome...
March 15, 2018: Journal of Biomechanics
https://www.readbyqxmd.com/read/29516039/non-structural-misalignments-of-body-posture-in-the-sagittal-plane
#12
REVIEW
Dariusz Czaprowski, Łukasz Stoliński, Marcin Tyrakowski, Mateusz Kozinoga, Tomasz Kotwicki
Background: The physiological sagittal spinal curvature represents a typical feature of good body posture in the sagittal plane. The cervical and the lumbar spine are curved anteriorly (lordosis), while the thoracic segment is curved posteriorly (kyphosis). The pelvis is inclined anteriorly, and the lower limbs' joints remain in a neutral position. However, there are many deviations from the optimal body alignment.The aim of this paper is to present the most common types of non-structural misalignments of the body posture in the sagittal plane...
2018: Scoliosis and Spinal Disorders
https://www.readbyqxmd.com/read/29513028/biomechanical-analysis-of-lumbar-interbody-fusion-cages-with-various-lordotic-angles-a-finite-element-study
#13
Zhenjun Zhang, Guy R Fogel, Zhenhua Liao, Yitao Sun, Weiqiang Liu
Inappropriate lordotic angle of lumbar fusion cage could be associated with cage damage or subsidence. The biomechanical influence of cage lordotic angle on lumbar spine has not been fully investigated. Four surgical finite element models were constructed by inserting cages with various lordotic angles at L3-L4 disc space. The four motion modes were simulated. The range of motion (ROM) decreased with increased lordotic angle of cage in flexion, extension, and rotation, whereas it was not substantially changed in bending...
February 2018: Computer Methods in Biomechanics and Biomedical Engineering
https://www.readbyqxmd.com/read/29478211/anterior-cervical-corpectomy-and-fusion-versus-discectomy-and-fusion-for-the-treatment-of-two-level-cervical-spondylotic-myelopathy-analysis-of-sagittal-balance-and-axial-symptoms
#14
Yijian Zhang, Hao Liu, Huilin Yang, Bin Pi
PURPOSE: To compare the postoperative sagittal balance and occurrence of axial symptoms between anterior cervical corpectomy and fusion (ACCF) and anterior cervical discectomy and fusion (ACDF) for the treatment of two-level cervical spondylotic myelopathy (CSM). METHODS: A total of 71 consecutive patients who underwent ACCF or ACDF for two-level CSM in our institution from January 2014 to December 2016 were retrospectively reviewed. Of these patients, 30 (17 males, 13 females) were subjected to ACCF, and 41 (20 males, 21 females) were treated with ACDF...
February 24, 2018: International Orthopaedics
https://www.readbyqxmd.com/read/29463273/outcomes-of-oblique-lateral-interbody-fusion-for-degenerative-lumbar-disease-in-patients-under-or-over-65-years-of-age
#15
Chengzhen Jin, Milin S Jaiswal, Sin-Soo Jeun, Kyeong-Sik Ryu, Jung-Woo Hur, Jin-Sung Kim
BACKGROUND: Oblique lateral interbody fusion (OLIF) offers the solution to problems of anterior lumbar interbody fusion (ALIF) and lateral lumbar interbody fusion (LLIF). However, OLIF technique for degenerative spinal diseases of elderly patients has been rarely reported. The objective of this study was to determine the clinical and radiological results of OLIF technique for degenerative spinal diseases in patients under or over 65 years of age. METHODS: Sixty-three patients who underwent OLIF procedure were enrolled, including 29 patients who were less than 65 years of age and 34 patients who were over 65 years of age...
February 20, 2018: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/29429252/-long-term-follow-up-of-c-1-c-2-pedicle-screw-fixation-for-pediatric-atlantoaxial-dislocation
#16
B Lin, Z D Chen, T Y Cai, S S Wu, Z M Guo
Objective: To investigate the clinical curative effect of C(1)-C(2) pedicle screw fixation for pediatric atlantoaxial dislocation after a long-term follow-up. Methods: From March 2005 to April 2011, a total of 12 male and 9 female patients were included, with age from 3 to 9 years old (mean, 6.1 years old). Among them, 14 cases (67%) had typeⅠinstability atlantoaxial dislocation, 7 cases (33%) had type Ⅱ reducible atlantoaxial dislocation. All 21 pediatric patients with atlantoaxial dislocation underwent posterior pedicle screw fixations...
February 6, 2018: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/29428293/impact-of-spine-alignment-on-the-rotator-cuff-in-long-term-wheelchair-users
#17
Yasser Kentar, Manuela Brunner, Thomas Bruckner, Andreas Hug, Patric Raiss, Felix Zeifang, Markus Loew, Haidara Almansour, Michael Akbar
BACKGROUND: We investigated the impact of poor seated posture on the prevalence of rotator cuff tears (RCTs) among wheelchair-dependent individuals with long-standing paraplegia. METHODS: The study included 319 patients. Lateral radiographs of the spine were collected from a database and analyzed to assess the global spinopelvic alignment (SPA). Magnetic resonance images of both shoulders were obtained to detect the presence of cuff tears. Patients were divided into 2 groups: Group RCT-I included all patients with cuff tears (right, left, or bilateral), whereas group RCT-II consisted exclusively of patients with bilateral cuff tears...
February 8, 2018: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29396690/-correction-of-kyphotic-fixed-lumbar-segments-and-hypolordosis-with-the-transforaminal-lumbar-interbody-fusion-technique
#18
REVIEW
F Lattig, E Stettin, S Weckbach
OBJECTIVE: Correction of a segmental or global lumbar hypolordosis to improve a sagittal imbalance. INDICATIONS: Lumbar segments fixed in kyphosis; degenerative or posttraumatic hypolordotic deformity of the lumbar spine with sagittal imbalance. CONTRAINDICATIONS: Bechterew disease; extended adhesions in the retroperitoneum. SURGICAL TECHNIQUE: Segmental correction of a kyphotic fixed segment using a unilateral transforaminal approach to release the annulus and anterior longitudinal ligament...
February 2, 2018: Operative Orthopädie und Traumatologie
https://www.readbyqxmd.com/read/29355790/small-c7-t1-lordotic-angle-and-muscle-degeneration-at-c7-level-were-independent-radiological-characteristics-of-patients-with-cervical-imbalance-a-propensity-score-matched-analysis
#19
Koji Tamai, Joshua Romanu, Phillip Grisdela, Permsak Paholpak, Pengfei Zheng, Hiroaki Nakamura, Zorica Buser, Jeffrey C Wang
BACKGROUND CONTEXT: Cervical sagittal vertical axis (cSVA) of ≥40 mm is recognized as the key factor of poor health-related quality of life, poor surgical outcomes, and correction loss after surgery for cervical deformity. However, little is known about the radiological characteristics of patients with cSVA≥40 mm. PURPOSE: The purpose of this study was to identify the radiological characteristics of patients with cervical imbalance. DESIGN: Retrospective analysis of weight-bearing cervical magnetic resonance (MR) images...
January 31, 2018: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/29353149/different-ways-to-balance-the-spine-in-sitting-muscle-activity-in-specific-postures-differs-between-individuals-with-and-without-a-history-of-back-pain-in-sitting
#20
Andrew P Claus, Julie A Hides, G Lorimer Moseley, Paul W Hodges
BACKGROUND: Previous research explored muscle activity in four distinct sitting postures with fine-wire electromyography, and found that lumbar multifidus muscle activity increased incrementally between sitting with flat thoracolumbar and lumbar regions, long thoracolumbar lordosis, or short lordosis confined to the lumbar region. This study used similar methods to explore whether people with a history of low back pain provoked by prolonged sitting used different patterns of trunk muscle activity in specific postures...
February 2018: Clinical Biomechanics
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