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Sagittal balance

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https://www.readbyqxmd.com/read/28549902/does-corrective-spine-surgery-improve-the-standing-balance-in-patients-with-adult-spinal-deformity
#1
Mitsuru Yagi, Hideaki Ohne, Shinjiro Kaneko, Masafumi Machida, Yoshiyuki Yato, Takashi Asazuma
BACKGROUND CONTEXT: The effect of corrective spine surgery on standing stability in adult spinal deformity (ASD) has not been fully documented. PURPOSE: To compare pre- and postoperative standing balance and posture in patients with ASD. STUDY DESIGN/SETTING: Prospective case series. PATIENT SAMPLE: Standing balance before and after corrective spine surgery was compared in 35 consecutive female patients with ASD (65...
May 23, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28549604/effects-of-eight-different-ligament-property-datasets-on-biomechanics-of-a-lumbar-l4-l5-finite-element-model
#2
S Naserkhaki, N Arjmand, A Shirazi-Adl, F Farahmand, M El-Rich
Ligaments assist trunk muscles in balancing external moments and providing spinal stability. In absence of the personalized material properties for ligaments, finite element (FE) models use dispersed data from the literature. This study aims to investigate the relative effects of eight different ligament property datasets on FE model responses. Eight L4-L5 models distinct only in ligament properties were constructed and loaded under moment (15Nm) alone or combined with a compressive follower load (FL). Range of motions (RoM) of the disc-alone model matched well in vitro data...
May 16, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28542100/global-spinal-alignment-in-patients-with-cervical-spondylotic-myelopathy
#3
Go Yoshida, Abdulmajeed Alzakri, Vincent Pointillart, Louis Boissiere, Ibrahim Obeid, Yukihiro Matsuyama, Jean Marc Vital, Olivier Gille
STUDY DESIGN: Prospective radiographic analysis of cervical spondylotic myelopathy (CSM) OBJECTIVE.: To clarify the pathophysiology of CSM, and use the characteristic of global spinal alignment for determining the surgical strategy. SUMMARY OF BACKGROUND DATA: Radiographic evaluation of CSM, in general, comprises cervical magnetic resonance imaging (MRI) and regional cervical radiography, which cannot distinguish between cervical hyperlodorsis with spinopelvic compensation and cervical lordorsis with normal global alignment...
May 24, 2017: Spine
https://www.readbyqxmd.com/read/28536117/the-association-between-whole-body-sagittal-balance-and-risk-of-falls-among-elderly-patients-seeking-treatment-for-back-pain
#4
J Kim, J Y Hwang, J K Oh, M S Park, S W Kim, H Chang, T-H Kim
OBJECTIVES: The objective of this study was to assess the association between whole body sagittal balance and risk of falls in elderly patients who have sought treatment for back pain. Balanced spinal sagittal alignment is known to be important for the prevention of falls. However, spinal sagittal imbalance can be markedly compensated by the lower extremities, and whole body sagittal balance including the lower extremities should be assessed to evaluate actual imbalances related to falls...
May 2017: Bone & Joint Research
https://www.readbyqxmd.com/read/28524126/-impact-of-sagittal-balance-parameters-on-life-quality-in-elderly-and-senile-patients-after-surgery-for-degenerative-lumbar-spine-stenosis
#5
V S Klimov, I I Vasilenko, A V Evsyukov, E V Amelina
INTRODUCTION: As the life span and proportion of people over 65 years increase, the incidence of degenerative lumbar spine stenosis grows proportionally. Various parameters of the spinopelvic relationships are used to predict surgical treatment outcomes in patients with degenerative spine diseases. There are no unified protocols for evaluation, in terms of the sagittal balance, of surgical treatment outcomes in elderly patients. PURPOSE: To study the impact of sagittal balance parameters on the life quality of elderly and senile patients after surgery for degenerative stenosis of the lumbar spine...
2017: Zhurnal Voprosy Neĭrokhirurgii Imeni N. N. Burdenko
https://www.readbyqxmd.com/read/28523427/-total-ankle-arthroplasty-with-simultaneous-subtalar-fusion
#6
J Mainzer, P Rippstein
OBJECTIVE: Pain free weight bearing ability with orthograde hindfoot position and preserved tibiotalar motion. INDICATIONS: Symptomatic arthritis of the ankle and subtalar joint, additional subtalar hindfoot malalignment. CONTRAINDICATIONS: Absolute: acute infection, noncorrectable ligamentous instability or bony defects, restricted perfusion, diabetic foot syndrome. Relative: inability to comply with postoperative partial weight bearing, only moderate symptoms of subtalar arthritis, smoking, intricate soft tissue situation...
May 18, 2017: Operative Orthopädie und Traumatologie
https://www.readbyqxmd.com/read/28507885/effect-of-cervical-sagittal-balance-on-laminoplasty-in-patients-with-cervical-myelopathy
#7
Minori Kato, Takashi Namikawa, Akira Matsumura, Sadahiko Konishi, Hiroaki Nakamura
STUDY DESIGN: Retrospective clinical study. OBJECTIVE: We evaluated the relationship between cervical sagittal alignment parameters and clinical status in patients with cervical myelopathy and analyzed the effect of cervical sagittal balance on cervical laminoplasty. METHODS: Patients with cervical myelopathy (n = 110) who underwent laminoplasty were included in this study. The relationship between cervical sagittal alignment parameters and clinical status was evaluated...
April 2017: Global Spine Journal
https://www.readbyqxmd.com/read/28507779/spinal-osteotomies-indications-limits-and-pitfalls
#8
REVIEW
Kamil Cagri Kose, Omer Bozduman, Ali Erkan Yenigul, Servet Igrek
The aims of spinal deformity surgery are to achieve balance, relieve pain and prevent recurrence or worsening of the deformity.The main types of osteotomies are the Smith-Petersen osteotomy (SPO), pedicle subtraction osteotomy (PSO), bone-disc-bone osteotomy (BDBO) and vertebral column resection (VCR), in order of increasing complexity.SPO is a posterior column osteotomy in which the posterior ligaments and the facet joints are removed and correction is performed through the disc space. A mobile anterior disc is essential...
March 2017: EFORT Open Rev
https://www.readbyqxmd.com/read/28503144/rigid-ankle-foot-orthosis-deteriorates-mediolateral-balance-control-and-vertical-braking-during-gait-initiation
#9
Arnaud Delafontaine, Olivier Gagey, Silvia Colnaghi, Manh-Cuong Do, Jean-Louis Honeine
Rigid ankle-foot orthoses (AFO) are commonly used for impeding foot drop during the swing phase of gait. They also reduce pain and improve gait kinematics in patients with weakness or loss of integrity of ankle-foot complex structures due to various pathological conditions. However, this comes at the price of constraining ankle joint mobility, which might affect propulsive force generation and balance control. The present study examined the effects of wearing an AFO on biomechanical variables and electromyographic activity of tibialis anterior (TA) and soleus muscles during gait initiation (GI)...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28493067/visuotactile-interaction-even-in-far-sagittal-space-in-older-adults-with-decreased-gait-and-balance-functions
#10
Wataru Teramoto, Keito Honda, Kento Furuta, Kaoru Sekiyama
Spatial proximity of signals from different sensory modalities is known to be a crucial factor in facilitating efficient multisensory processing in young adults. However, recent studies have demonstrated that older adults exhibit strong visuotactile interactions even when the visual stimuli were presented in a spatially disparate position from a tactile stimulus. This suggests that visuotactile peripersonal space differs between older and younger adults. In the present study, we investigated to what extent peripersonal space expands in the sagittal direction and whether this expansion was linked to the decline in sensorimotor functions in older adults...
May 10, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28479481/a-shared-biomechanical-environment-for-bone-and-posture-development-in-children
#11
Fábio A Araújo, Ana Martins, Nuno Alegrete, Laura D Howe, Raquel Lucas
BACKGROUND CONTEXT: In each specific habitual standing posture, gravitational forces determine the mechanical setting provided to skeletal structures. Bone quality and resistance to physical stress is highly determined by habitual mechanical stimulation. However, the relationship between bone properties and sagittal posture has never been studied in children. PURPOSE: To investigate the association between bone physical properties and sagittal standing postural patterns in 7-year-old children...
May 4, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28476690/the-relationships-between-low-back-pain-and-lumbar-lordosis-a-systematic-review-and-meta-analysis
#12
REVIEW
Se-Woong Chun, Chai-Young Lim, Keewon Kim, Jinseub Hwang, Sun G Chung
BACKGROUND CONTEXT: Clinicians regard lumbar lordotic curvature (LLC) with respect to low back pain (LBP) in a contradictory fashion. The time-honored point of view is that LLC itself, or its increment causes LBP. On the other hand, recently, the biomechanical role of LLC has been emphasized and loss of lordosis is considered a possible cause of LBP. The relationship between LLC and LBP has immense clinical significance, since it serves as the basis of therapeutic exercises for treating and preventing LBP...
May 2, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28456677/kinematic-evaluation-of-cervical-sagittal-balance-and-thoracic-inlet-alignment-in-degenerative-cervical-spondylolisthesis-using-kmri
#13
Permsak Pahpolak, Alexander Nazareth, Patrick C Hsieh, Zorica Buser, Jeffrey C Wang
BACKGROUND CONTEXT: T1 slope is a novel thoracic parameter used to assess cervical spine sagittal balance. Thoracic Index (TI) parameters including T1 slope and cervical sagittal alignment parameters may play an important role in degenerative cervical spondylolisthesis (DCS). Current literature regarding the relationship between TI and cervical sagittal alignment parameters in patients with DCS is limited. PURPOSE: (1) To evaluate the T1 slope, cervical sagittal alignment, and Thoracic Inlet parameter in patients with DCS using kMRI, and (2) To find a correlation between the T1 slope, TI and other cervical sagittal parameters in DCS patients...
April 26, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28455623/classification-of-normal-sagittal-spine-alignment-refounding-the-roussouly-classification
#14
Féthi Laouissat, Amer Sebaaly, Martin Gehrchen, Pierre Roussouly
PURPOSE: Although the Roussouly classification of common variants in spinal sagittal alignment is well accepted, no studies have implemented it in an asymptomatic adult population. In addition, no study investigated the radiographic features of asymptomatic patients with an anteverted pelvis. The aim of this prospective radiographic study of 296 asymptomatic adults without spinal pathology was to investigate how the Roussouly classification could include the anteverted pelvis concept...
April 28, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28452632/the-impact-of-spinopelvic-morphology-on-the-short-term-outcome-of-pedicle-subtraction-osteotomy-in-104-patients
#15
Karin Eskilsson, Deep Sharma, Christer Johansson, Rune Hedlund
OBJECTIVE Pedicle subtraction osteotomy (PSO) is commonly performed for correction of spinal sagittal plane deformities. The PSO results in complex, multiple changes of the spinopelvic alignment. The influence of the variability of individual pelvic morphology has not been fully analyzed in previous outcome studies of sagittal imbalance. The aim of this study was to define radiological variables affecting the outcome after PSO in adult spinal deformities, with special emphasis on the variability of pelvic morphology...
April 28, 2017: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/28451509/hybrid-instrumentation-in-lumbar-spinal-fusion-a-biomechanical-evaluation-of-three-different-instrumentation-techniques
#16
Peter Obid, Reza Danyali, Rebecca Kueny, Gerd Huber, Michael Reichl, Alexander Richter, Thomas Niemeyer, Michael Morlock, Klaus Püschel, Hüseyin Übeyli
STUDY DESIGN: Ex vivo human cadaveric study. OBJECTIVE: The development or progression of adjacent segment disease (ASD) after spine stabilization and fusion is a major problem in spine surgery. Apart from optimal balancing of the sagittal profile, dynamic instrumentation is often suggested to prevent or impede ASD. Hybrid instrumentation is used to gain stabilization while allowing motion to avoid hypermobility in the adjacent segment. In this biomechanical study, the effects of two different hybrid instrumentations on human cadaver spines were evaluated and compared with a rigid instrumentation...
February 2017: Global Spine Journal
https://www.readbyqxmd.com/read/28441314/radiologic-parameters-can-affect-the-preoperative-decision-making-of-three-column-spinal-osteotomies-in-the-treatment-of-severe-and-stiff-kyhposcoliosis
#17
Hengwei Fan, Xueshi Li, Zifang Huang, Wenyuan Sui, Jingfan Yang, Yaolong Deng, Chongwen Wang, Chuandong Lang, Junlin Yang
STUDY DESIGN: Retrospective analysis. OBJECTIVE: To evaluate radiologic parameters affect spine surgeon's osteotomy choice on patients with severe and stiff thoracic kyphoscoliosis. SUMMARY OF BACKGROUD DATA: Three-column osteotomies were developed to address severe and stiff kyphoscolisis. Current choice on osteotomies based on the morphology of kyphosis, global balance and locations of the main curvature, however, quantitative basis for decision-making is still lacking...
April 24, 2017: Spine
https://www.readbyqxmd.com/read/28441308/factors-associated-with-the-development-of-and-revision-for-proximal-junctional-kyphosis-in-440-consecutive-adult-spinal-deformity-patients
#18
Fred H Nicholls, Junseok Bae, Alexander A Theologis, Murat S Eksi, Christopher P Ames, Sigurd H Berven, Shane Burch, Bobby K Tay, Vedat Deviren
STUDY DESIGN: Retrospective review of prospectively collected data OBJECTIVE.: The aim of this study was to examine which radiographic parameters and surgical strategies are most closely associated with proximal junctional kyphosis (PJK) after adult spinal deformity (ASD) surgery, the need for revision surgery for PJK, and whether these differ based on the upper instrumented vertebra (UIV). SUMMARY OF BACKGROUND DATA: Multiple parameters are considered when planning correction of ASD...
April 24, 2017: Spine
https://www.readbyqxmd.com/read/28439308/vertical-expandable-prosthetic-titanium-ribs-veptr-in-early-onset-scoliosis-impact-on-thoracic-compliance-and-sagittal-balance
#19
M R Konieczny, A-K Ehrlich, R Krauspe
BACKGROUND: Theoretically, dynamic thoracic compliance (DTC) should be reduced by vertical expandable prosthetic titanium ribs (VEPTR) since titanium rods, scar tissue and ossifications increase stiffness of the rib cage. The effect of VEPTR on thoracic compliance has not yet been elucidated. The impact of VEPTR on the development of sagittal balance has not been fully investigated. PATIENTS AND METHODS: In a retrospective study, we investigated 21 consecutive children who were treated by VEPTR from 2004 to 2011 and three control groups...
2017: Journal of Children's Orthopaedics
https://www.readbyqxmd.com/read/28438449/ankylosing-spondylitis-increases-perioperative-and-postoperative-complications-after-total-hip-arthroplasty
#20
Daniel J Blizzard, Colin T Penrose, Charles Z Sheets, Thorsten M Seyler, Michael P Bolognesi, Christopher R Brown
BACKGROUND: Ankylosing spondylitis (AS) is a chronic autoimmune spondyloarthropathy that primarily affects the axial spine and hips. Progressive disease leads to pronounced spinal kyphosis, positive sagittal balance, and altered biomechanics. The purpose of this study is to determine the complication profile of patients with AS undergoing total hip arthroplasty (THA). METHODS: The Medicare sample was searched from 2005 to 2012 yielding 1006 patients with AS who subsequently underwent THA...
March 27, 2017: Journal of Arthroplasty
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