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https://www.readbyqxmd.com/read/27927572/the-spinopelvic-geometry-in-different-lenke-curve-types-of-adolescent-idiopathic-scoliosis
#1
M Farshad, S Catanzaro, S L Schmid
BACKGROUND: The Lenke classification is well established in differentiation of curve types in adolescent idiopathic scoliosis (AIS) and guides selection of fusion levels. However, to date, it has neglected the spinopelvic parameters that have been associated with compensatory mechanisms in balancing the human erect posture and adjacent segment problems after spinal fusion. The aim of this study was to investigate spinopelvic parameters in different types of AIS curves. MATERIAL AND METHODS: Preoperative whole-spine radiographs from 100 patients with AIS were reviewed and the curves were classified according to Lenke...
November 2016: Spine Deformity
https://www.readbyqxmd.com/read/27927552/multicenter-comparison-of-3d-spinal-measurements-using-surface-topography-with-those-from-conventional-radiography
#2
Patrick Knott, Peter Sturm, Baron Lonner, Patrick Cahill, Marcel Betsch, Richard McCarthy, Michael Kelly, Lawrence Lenke, Randal Betz
INTRODUCTION: In pediatric spinal deformity the gold standard for curve surveillance remains standing full-column radiographs, but repeated exposure to ionizing radiation motivates us to look for nonradiographic solutions. This study tests a modern system of surface topography (ST) to determine whether it is reliable and reproducible. METHODS: Patients from 6 pediatric spinal deformity clinics were recruited for enrollment. Inclusion criteria were age 8-18; diagnosis of scoliosis measuring ≥10 and <50 degrees or increased kyphosis of ≥45 degrees...
March 2016: Spine Deformity
https://www.readbyqxmd.com/read/27927545/does-planned-staging-for-posterior-only-vertebral-column-resections-in-spinal-deformity-surgery-increase-perioperative-complications
#3
Jeffrey L Gum, Lawrence G Lenke, David Bumpass, Johnny Zhao, Patrick Sugrue, Isaac Karikari, Ra'Kerry Rahman, Leah Y Carreon
STUDY DESIGN: Propensity-matched case control. OBJECTIVES: To compare the perioperative complication rate between single- and two-stage posterior-only VCRs (2-pVCR). SUMMARY OF BACKGROUND DATA: A vertebral column resection (VCR) for severe spinal deformity is a technically challenging and lengthy procedure with a potentially high complication rate. Planned staging has an advantage of distributing operative time into 2 smaller, more manageable, intervals...
March 2016: Spine Deformity
https://www.readbyqxmd.com/read/27927544/assessment-of-lowest-instrumented-vertebra-tilt-on-radiographic-measurements-in-lenke-c-modifier-curves-undergoing-selective-thoracic-fusion-in-adolescent-idiopathic-scoliosis
#4
David L Skaggs, Derek A Seehausen, Kent T Yamaguchi, Raymond J Hah, Margaret L Wright, David B Bumpass, Han J Kim, Lindsay M Andras, Michael G Vitale, Lawrence G Lenke
STUDY DESIGN: Multicenter, retrospective cohort study. OBJECTIVES: The purpose of this study is to determine how the amount of residual lowest instrumented vertebra (LIV) tilt correlates with radiographic measurements. SUMMARY OF BACKGROUND DATA: When performing a selective thoracic posterior spinal fusion for adolescent idiopathic scoliosis (AIS), the LIV may be tilted into the lumbar curve or made horizontal. METHODS: This is a multicenter retrospective study of 33 consecutive patients with AIS, Lenke types 1 to 4, lumbar modifier C, and a minimum follow-up of 2 years, who underwent selective thoracic posterior spinal fusions...
March 2016: Spine Deformity
https://www.readbyqxmd.com/read/27927501/morphometric-analysis-of-the-thoracic-intervertebral-foramen-osseous-anatomy-in-adolescent-idiopathic-scoliosis-using-low-dose-computed-tomography
#5
Thorbjorn J Loch-Wilkinson, Maree T Izatt, Robert D Labrom, Geoffrey N Askin, Mark J Pearcy, Clayton J Adam
PURPOSE: The dimensions of the thoracic intervertebral foramen in adolescent idiopathic scoliosis (AIS) have not previously been quantified. Better understanding of the dimensions of the foramen may be useful in surgical planning. This study describes a reproducible method for measurement of the thoracic foramen in AIS using computed tomography (CT). METHODS: In 23 preoperative female patients with Lenke 1 type AIS with right-side convexity major curves confined to the thoracic spine the foraminal height (FH), foraminal width (FW), pedicle to superior articular process distance (P-SAP), and cross-sectional foraminal area (FA) were measured using multiplanar reconstructed CT...
May 2016: Spine Deformity
https://www.readbyqxmd.com/read/27906378/cool-white-light-emitting-three-stack-oled-structures-for-amoled-display-applications
#6
Ramon Springer, Byoung Yeop Kang, Raju Lampande, Dae Hyun Ahn, Simone Lenk, Sebastian Reineke, Jang Hyuk Kwon
This paper demonstrates 2-stack and 3-stack white organic light-emitting diodes (WOLEDs) with fluorescent blue and phosphorescent yellow emissive units. The 2-stack and 3-stack WOLED comprises blue-yellow and blue-blue-yellow (blue-yellow-blue) combinations. The position of the yellow emitter and possible cavity lengths in different stack architectures are theoretically and experimentally investigated to reach Commission Internationale de L'Eclairage (CIE) coordinates of near (0.333/0.333). Here, a maximum external quantum efficiency (EQE) of 23...
November 28, 2016: Optics Express
https://www.readbyqxmd.com/read/27902790/accuracy-of-genomic-prediction-in-a-commercial-perennial-ryegrass-breeding-program
#7
Dario Fè, Bilal H Ashraf, Morten G Pedersen, Luc Janss, Stephen Byrne, Niels Roulund, Ingo Lenk, Thomas Didion, Torben Asp, Christian S Jensen, Just Jensen
The implementation of genomic selection (GS) in plant breeding, so far, has been mainly evaluated in crops farmed as homogeneous varieties, and the results have been generally positive. Fewer results are available for species, such as forage grasses, that are grown as heterogenous families (developed from multiparent crosses) in which the control of the genetic variation is far more complex. Here we test the potential for implementing GS in the breeding of perennial ryegrass ( L.) using empirical data from a commercial forage breeding program...
November 2016: Plant Genome
https://www.readbyqxmd.com/read/27900714/is-there-asymmetry-between-the-concave-and-convex-pedicles-in-adolescent-idiopathic-scoliosis-a-ct-investigation
#8
Colin M Davis, Caroline A Grant, Mark J Pearcy, Geoffrey N Askin, Robert D Labrom, Maree T Izatt, Clayton J Adam, J Paige Little
BACKGROUND: Adolescent idiopathic scoliosis is a complex three-dimensional deformity of the spine characterized by deformities in the sagittal, coronal, and axial planes. Spinal fusion using pedicle screw instrumentation is a widely used method for surgical correction in severe (coronal deformity, Cobb angle > 45°) adolescent idiopathic scoliosis curves. Understanding the anatomic difference in the pedicles of patients with adolescent idiopathic scoliosis is essential to reduce the risk of neurovascular or visceral injury through pedicle screw misplacement...
November 29, 2016: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/27888080/comparison-of-consecutive-interval-and-skipped-pedicle-screw-techniques-in-moderate-lenke-type-1-adolescent-idiopathic-scoliosis
#9
Ming Luo, Mingkui Shen, Wengang Wang, Lei Xia
OBJECTIVE: To compare perioperative, radiographic and Scoliosis Research Society (SRS)-22 outcomes of consecutive, interval, and skipped pedicle screw techniques in patients with moderate Lenke type 1 adolescent idiopathic scoliosis (AIS). METHODS: We retrospectively reviewed 65 consecutive moderate Lenke type 1 AIS patients at a single institution, using all-pedicle screw constructs with a minimum of 2-years follow-up. In the consecutive group (C group, n=22), pedicle screws were instrumented at consecutive levels bilaterally...
November 22, 2016: World Neurosurgery
https://www.readbyqxmd.com/read/27867080/biomechanical-advantages-of-robot-assisted-pedicle-screw-fixation-in-posterior-lumbar-interbody-fusion-compared-to-free-hand-technique-in-a-prospective-randomized-controlled-trial-perspective-for-patient-specific-finite-element-analysis
#10
Ho-Joong Kim, Kyoung-Tak Kang, Sung-Cheol Park, Bong-Soon Chang, Choon-Ki Lee, Jin S Yeom, Lawrence G Lenke
BACKGROUND CONTEXT: There have been conflicting results regarding the surgical outcome of lumbar fusion surgery using two different techniques between robot-assisted pedicle screw fixation and conventional free-hand technique. In addition, there have been no studies about biomechanical issues between the both techniques. PURPOSE: To investigate biomechanical properties in terms of stress at adjacent segments using robot-assisted pedicle screw insertion technique (robot-assisted minimally invasive posterior lumbar interbody fusion, Rom-PLIF) and free-hand technique (conventional, free-hand, open approach, posterior lumbar interbody fusion, Cop-PLIF) for instrumented lumbar fusion surgery...
November 17, 2016: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/27856625/longitudinal-micropet-imaging-of-the-zq175-mouse-model-of-huntington-s-disease-shows-in-vivo-changes-of-molecular-targets-in-the-striatum-and-the-cerebral-cortex
#11
Jenny Häggkvist, Miklós Tóth, Lenke Tari, Katarina Varnäs, Marie Svedberg, Anton Forsberg, Sangram Nag, Celia Dominguez, Ignacio Munoz-Sanjuan, Jonathan Bard, John Wityak, Andrea Varrone, Christer Halldin, Ladislav Mrzljak
RATIONALE: Since the discovery of the HTT gene in 1993, numerous animal models have been developed to study the progression of Huntington's disease, as well as to evaluate potential new therapeutics. In the present study we used small animal positron emission tomography (PET) to characterize the expression of molecular targets in the recently reported HD animal model, the zQ175 mouse model. METHODS: Male heterozygous zQ175 (Htttm1Mfc/190JChdi, CHDI-81003003) and wild type (WT, C57BL/6J) animals were imaged with the dopamine D2-receptor radioligand [(11)C]raclopride, the PDE10A radioligand [(18)F]MNI-659, the dopamine D1-receptor radioligand [(11)C]NNC 112 and the 5-HT2A radioligand [(11)C]MDL 100907 at 6 and 9 months of age...
November 10, 2016: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/27852499/does-an-internal-thoracoplasty-correct-and-prevent-a-reassertion-of-the-rib-cage-deformity-after-spine-surgery-for-an-adolescent-idiopathic-thoracic-scoliosis-greater-than-70-degrees
#12
Michael J McMaster, Marianne E McMaster
STUDY DESIGN: Prospective observational study. OBJECTIVE: To evaluate the effect of internal thoracoplasty and anterior spine release combined with posterior spinal instrumentation in correcting and preventing a reoccurrence of the rib cage deformity in adolescent idiopathic thoracic scoliosis >70 degrees. SUMMARY OF BACKGROUND DATA: The rib cage deformity rather than the lateral curvature of the spine is usually the major cosmetic deformity in severe adolescent idiopathic thoracic scoliosis...
January 2016: Spine Deformity
https://www.readbyqxmd.com/read/27851662/improvement-in-srs22r-pain-scores-after-surgery-for-adolescent-idiopathic-scoliosis
#13
Mladen Djurasovic, Steven D Glassman, Daniel J Sucato, Lawrence G Lenke, Charles H Crawford, Leah Y Carreon
STUDY DESIGN: Longitudinal cohort. OBJECTIVE: To investigate whether patients with painful adolescent idiopathic scoliosis experience pain relief with surgical treatment. SUMMARY OF BACKGROUND DATA: Adolescent idiopathic scoliosis (AIS) was previously thought to be a painless condition, but recent studies have shown that a significant proportion of patients have pain. Little information is available regarding pain relief with surgical treatment for AIS...
November 15, 2016: Spine
https://www.readbyqxmd.com/read/27847853/assessment-of-coronal-radiographic-parameters-of-the-spine-in-the-treatment-of-adolescent-idiopathic-scoliosis
#14
Mohsen Karami, Arash Maleki, Keyvan Mazda
BACKGROUND: To determine the most important preoperative factors that affect postoperative coronal parameters of scoliotic curves. METHODS: All Adolescent Idiopathic Scoliosis (AIS) patients included in the study were classified according to Lenke and King Classification. The fusion levels were selected according to the rigidity of the existing curves (correction less than 50%), tilt of T1 and shoulders, sagittal angle of the curves and with considering stable and neutral end vertebra...
October 2016: Archives of Bone and Joint Surgery
https://www.readbyqxmd.com/read/27844230/coronal-balance-in-idiopathic-scoliosis-a-radiological-study-after-posterior-fusion-of-thoracolumbar-lumbar-curves-lenke-5-or-6
#15
Changwei Yang, Yunfei Zhao, Xiao Zhai, Jingfeng Li, Xiaodong Zhu, Ming Li
PURPOSE: To explore the compensation mechanisms of immediate postoperative coronal imbalance (CIB) and identify the correlation between preoperative lumbosacral obliquity and postoperative CIB in patients with Lenke 5/6 adolescent idiopathic scoliosis (AIS) during a 2-year follow-up period. METHODS: Medical records of patients with Lenke 5/6 AIS who were admitted in our hospital between Jan. 2008 and Jan. 2013 were reviewed retrospectively. General information of the patients including gender, age, and Risser classification was collected...
November 14, 2016: European Spine Journal
https://www.readbyqxmd.com/read/27844228/accuracy-of-a-dynamic-surgical-guidance-probe-for-screw-insertion-in-the-cervical-spine-a-cadaveric-study
#16
Daniel Dixon, Bruce Darden, Jose Casamitjana, Karen A Weissmann, San Cristobal, David Powell, Daniel Baluch
STUDY DESIGN: A fresh frozen cadaver study was conducted. OBJECTIVE: To report the cortical breach rate using the dynamic surgical guidance (DSG) probe versus traditional freehand technique for cervical lateral mass, cervical pedicle and cervical laminar screws. METHODS: Nine male fresh frozen cadaveric torsos were utilized for this study. Each investigator was assigned three specimens that were randomized by fixation point, side and order of technique for establishing a screw pilot hole...
November 14, 2016: European Spine Journal
https://www.readbyqxmd.com/read/27831989/higher-flexibility-and-better-immediate-spontaneous-correction-may-not-gain-better-results-for-nonstructural-thoracic-curve-in-lenke-5c-ais-patients-risk-factors-for-its-correction-loss
#17
Yanbin Zhang, Guanfeng Lin, Shengru Wang, Jianguo Zhang, Jianxiong Shen, Yipeng Wang, Jianwei Guo, Xinyu Yang, Lijuan Zhao
STUDY DESIGN: Retrospective study. OBJECTIVE: To study the behavior of the unfused thoracic curve in Lenke type 5C during the follow-up and to identify risk factors for its correction loss. SUMMARY OF BACKGROUND DATA: Few studies have focused on the spontaneous behaviors of the unfused thoracic curve after selective thoracolumbar or lumbar fusion during the follow-up and the risk factors for spontaneous correction loss. METHODS: We retrospectively reviewed 45 patients (41 females and 4 males) with AIS who underwent selective TL/L fusion from 2006 to 2012 in a single institution...
November 15, 2016: Spine
https://www.readbyqxmd.com/read/27831984/baseline-patient-reported-outcomes-correlate-weakly-with-radiographic-parameters-a-multicenter-prospective-nih-adult-symptomatic-lumbar-scoliosis-study-of-286-patients
#18
Todd M Chapman, Christine R Baldus, Jon D Lurie, Steven D Glassman, Frank J Schwab, Christopher I Shaffrey, Virginie Lafage, Oheneba Boachie-Adjei, Han J Kim, Justin S Smith, Charles H Crawford, Lawrence G Lenke, Jacob M Buchowski, Charles Edwards, Tyler Koski, Stefan Parent, Stephen Lewis, Daniel G Kang, Jamal McClendon, Lionel Metz, Lukas P Zebala, Michael P Kelly, Kevin F Spratt, Keith H Bridwell
STUDY DESIGN: Prospective, cross-sectional study. OBJECTIVE: The aim of the study was to determine which radiographic parameters drive patient-reported outcomes (PROs) in primary presentation adult symptomatic lumbar scoliosis (ASLS). SUMMARY OF BACKGROUND DATA: Previous literature suggests correlations between PROs and sagittal plane deformity (sagittal vertical axis [SVA], pelvic incidence-lumbar lordosis [PI-LL] mismatch, pelvic tilt [PT])...
November 15, 2016: Spine
https://www.readbyqxmd.com/read/27831967/5-year-reoperation-risk-and-causes-for-revision-after-idiopathic-scoliosis-surgery
#19
S Imraan Ahmed, Tracey P Bastrom, Burt Yaszay, Peter O Newton
STUDY DESIGN: Actuarial "survivorship" analysis OBJECTIVE.: To define the incidence and cause of surgical revision five years after scoliosis surgery. SUMMARY OF BACKGROUND DATA: Data on contemporary revision surgery rates after idiopathic scoliosis surgery beyond the two years postoperatively in the adolescent and young adult population is limited. METHODS: Patients enrolled in a prospective, multicenter, idiopathic scoliosis surgical registry from 1995-2009 were reviewed...
November 9, 2016: Spine
https://www.readbyqxmd.com/read/27817137/titanium-vs-cobalt-chromium-what-is-the-best-rod-material-to-enhance-adolescent-idiopathic-scoliosis-correction-with-sublaminar-bands
#20
Audrey Angelliaume, E Ferrero, K Mazda, M Le Hanneur, F Accabled, J Sales de Gauzy, B Ilharreborde
PURPOSE: Cobalt chromium (CoCr) rods have recently gained popularity in adolescent idiopathic scoliosis (AIS) surgical treatment, replacing titanium (Ti) rods, with promising frontal correction rates in all-screw constructs. Posteromedial translation has been shown to emphasize thoracic sagittal correction, but the influence of rod material in this correction technique has never been investigated. The aim of this study was to compare the postoperative correction between Ti and CoCr rods for the treatment of thoracic AIS using posteromedial translation technique...
November 5, 2016: European Spine Journal
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