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Mitsuhiro Nishida, Takeo Nagura, Nobuyuki Fujita, Naobumi Hosogane, Takashi Tsuji, Masaya Nakamura, Morio Matsumoto, Kota Watanabe
BACKGROUND AND PURPOSE: Adolescent idiopathic scoliosis (AIS) is a structural, lateral curvature with rotation of the spine that develops around puberty. The influence of this spinal deformity on three-dimensional trunk movements during gait has not yet been elucidated. The aim of this study was to determine the influence of spinal curve pattern (single thoracic curve vs. single lumbar curve) on trunk kinematics during gait. METHODS: Twenty-two patients with a single thoracic curve (Lenke type 1) and 17 patients with a single lumbar curve (Lenke type 5) were included in this study...
October 11, 2016: Gait & Posture
Pooria Hosseini, Colin Nnadi, Ľuboš Rehák, Martin Repko, Michael Grevitt, Ufuk Aydinli, Allen Carl, Jeff Pawelek, Dennis Crandall, Behrooz A Akbarnia
STUDY DESIGN: A prospective, nonrandomized, multicenter study. OBJECTIVES: The purpose of this study was to evaluate the amount of motion present at instrumented but unfused segments and at motion segments adjacent to the instrumentation following application of a new posterior apical short-segment correction technique for correcting adolescent idiopathic scoliosis (AIS). SUMMARY OF BACKGROUND DATA: High-density pedicle screw instrumentation and posterior arthrodesis of all instrumented levels is the most common surgical treatment for AIS stabilization...
October 15, 2016: Spine
Leo Fradet, Xiaoyu Wang, Lawrence G Lenke, Carl-Eric Aubin
BACKGROUND: Proximal junctional failure is a severe proximal junctional complication following adult spinal instrumentation and involving acute proximal junctional kyphotic deformity, mechanical failure at the upper instrumented vertebra or just above, and/or proximal junctional osseoligamentous disruption. Clinical studies have identified potential risk factors, but knowledge on their biomechanics is still lacking for addressing the proximal junctional failure issues. The objective of this study was to develop comprehensive computational modeling and simulation techniques to investigate proximal junctional failure...
October 11, 2016: Clinical Biomechanics
Yong-Chan Kim, Lawrence G Lenke, Seon-Jong Lee, Jeffrey L Gum, Sirichai Wilartratsami, Kathy M Blanke
PURPOSE: Our study aimed to confirm the correlation between the Cranial Sagittal Vertical Axis (CrSVA) and patient-reported outcomes and to compare clinical correlation between CrSVA and C7 SVA in adult spinal deformity (ASD) patients. METHODS: 108 consecutive ASD patients were evaluated using the EOS(®) 2D/3D radio-imaging device. A vertical plumb line from the cranial center was utilized to measure the distance to the posterior corner of S1 (CrSVA-S), and to the centers of the hip (CrSVA-H), the knee (CrSVA-K), and ankle (CrSVA-A), as well as measuring the standard C7 SVA...
October 14, 2016: European Spine Journal
Mun Keong Kwan, Chee Kidd Chiu, Chris Yin Wei Chan
PURPOSE: To assess the pattern of intra-operative blood loss at various surgical stages comparing between single and two surgeons. METHODS: Lenke 1 and 2 adolescent idiopathic scoliosis (AIS) patients who underwent instrumented posterior spinal fusion (PSF) surgery from two centres between June 2014 and December 2015 were prospectively recruited into this study. The patients were grouped into Group 1 (single surgeon) and Group 2 (two surgeons). One to one matching using 'prospective propensity score-matched cohort patient sampling method' was done...
October 12, 2016: European Spine Journal
Takahiro Makino, Takashi Kaito, Yusuke Sakai, Shota Takenaka, Kazuomi Sugamoto, Hideki Yoshikawa
BACKGROUND: Vertebral bodies in patients with adolescent idiopathic scoliosis (AIS) usually have frontal wedge deformities. However, the plasticity of the deformed vertebrae in skeletally immature patients is unknown. The purpose of our study was to clarify the plasticity of vertebral deformities in skeletally immature patients with AIS by using in vivo three-dimensional (3D) analysis. METHODS: Ten female patients with AIS (mean age, 12.2 years; three patients, Lenke type 1; five patients, type 2; two patients, type 5) who underwent posterior fusion and whose Risser grade was ≤3 at surgery were included...
October 12, 2016: BMC Musculoskeletal Disorders
Arnaud Dubory, Lotfi Miladi, Brice Ilharreborde, Jean-Marie Gennari, Jihane Rouissi, Christophe Glorion, Charles Henri Flouzat Lachaniette, Thierry Odent
PURPOSE: Anterior fusion is a well-established procedure for the treatment of Lenke 5C adolescent idiopathic scoliosis (AIS). This retrospective study aimed to assess preoperative and postoperative radiographic differences between the conventional anterior fusion and anterior short fusions (ASF) in Lenke 5C AIS. METHODS: Radiographic data of 42 consecutive cases of Lenke 5C AIS, which were surgically treated through anterior segmental fusion, were analyzed retrospectively...
October 4, 2016: European Spine Journal
Seong Rok Han
There are very few reports of spinal epidural lipomatosis (SEL) in association with scoliosis. A 49-year-old man presented with persistent back pain and right hip lump. The lumbar spine X-rays showed scoliosis (Lenke classification 5BN). Lumbar MRI demonstrated circumferential epidural fat deposit from L1 to lower S2 level. There was no obvious etiology of SEL except mild increased body mass index (BMI). The patient was managed with conservative treatment. After 6 months medication (limaprost and ginkgo), his symptoms were relieved...
March 2016: J Spine Surg
Jean Claude De Mauroy, Sophie Pourret, Frédéric Barral
OBJECTIVE: ART is the acronym for Asymmetry, Rigid, Torsion. The realization of this brace is based on new concepts (circled helicoid, global detorsion, Soft Contact, Mayonnaise tube effect, axilla baby lift, wrench & bolt…). The excellent in-brace correction has been proved on a consecutive series of 141 AIS selected according to the SRS criteria in a prospective database. Results at six months and a year were compared with those of the former Lyon brace and confirm that these good results remain constant...
September 2016: Annals of Physical and Rehabilitation Medicine
Jean-Claude Bernard, Eric Berthonnaud, Nuria Rodriguez-Martinez, Julie Deceuninck, Emmanuelle Chaleat-Valayer
OBJECTIVE: Three-dimensional imaging was performed to identify if Lenke 1A curves could be reclassified in subgroups to improved orthopedic or surgical treatment of adolescent idiopathic scoliosis. It seems that multitude of 3D reconstructions can exist in Lenke 1A curves. With his classification Lenke introduces new parameters in radiographic analysis of idiopathic scoliosis like frontal lumbar and thoracic sagittal modifiers. Scoliosis is defined as a three dimensional deformity in frontal, sagittal and horizontal plane...
September 2016: Annals of Physical and Rehabilitation Medicine
Jean Claude De Mauroy, Sophie Pourret, Frédéric Barral
OBJECTIVE: All recent studies confirm that the outcome of a conservative orthopaedic treatment depends on the compliance and the effectiveness of bracing measured by immediate in-brace curve correction. There is a correlation between immediate in-brace correction and biomechanical effectiveness of brace treatment in adolescent idiopathic scoliosis. In a retrospective analysis of the immediate in-brace correction obtained from a consecutive series of patients treated by the major SOSORT teams, the conclusion was that an effective brace should be able to achieve 50% correction of the curve magnitude, immediately after application...
September 2016: Annals of Physical and Rehabilitation Medicine
Mark F Abel, Anuj Singla, Mark A Feger, Lindsay D Sauer, Wendy Novicoff
AIM: To compare the posterior vs anterior approaches for fusion of Lenke 5 adolescent idiopathic scoliosis curves, matched for curve magnitude and for the distal level of fixation (dLOF) standardized to the third lumbar vertebrae (L3). METHODS: A prospectively collected multicenter database was used for this retrospective comparative study. Our dependent variables included sagittal and coronal radiographic measurements, number of fused vertebrae, estimated blood loss, length of hospitalization and SRS total and individual domain scores at the two-year follow-up...
September 18, 2016: World Journal of Orthopedics
Fei Wang, Xiao-Yi Zhou, Xi-Ming Xu, Yi-Lin Yang, Xiao-Dong Zhu, Yu-Shu Bai, Xian-Zhao Wei, Ming Li
STUDY DESIGN: A retrospective clinical and radiographic study. OBJECTIVE: To analyze the radiographic change in CSA and identify the possible factors influencing the postoperative CSA in selective posterior TL/L curve correction. SUMMARY OF BACKGROUND DATA: The correlation between the CSA and thoracic sagittal alignment (TSA) is a well-recognized phenomenon in patients with thoracic idiopathic scoliosis. However, little has been published about the influence of thoracolumbar/lumbar (TL/L) curve instrumentation on CSA...
September 23, 2016: Spine
Choon Sung Lee, Chang Ju Hwang, Eic Ju Lim, Dong-Ho Lee, Jae Hwan Cho
OBJECTIVE Postoperative shoulder imbalance (PSI) is a critical consideration after corrective surgery for a double thoracic curve (Lenke Type 2); however, the radiographic factors related to PSI remain unclear. The purpose of this study was to identify the radiographic factors related to PSI after corrective surgery for adolescent idiopathic scoliosis (AIS) in patients with a double thoracic curve. METHODS This study included 80 patients with Lenke Type 2 AIS who underwent corrective surgery. Patients were grouped according to the presence [PSI(+)] or absence [PSI(-)] of shoulder imbalance at the final follow-up examination (differences of 20, 15, and 10 mm were used)...
September 23, 2016: Journal of Neurosurgery. Pediatrics
Caitlin E Caspi, Kathleen Lenk, Jennifer E Pelletier, Timothy L Barnes, Lisa Harnack, Darin J Erickson, Melissa N Laska
OBJECTIVE: Little is known about customer purchases of foods and beverages from small and non-traditional food retailers (i.e. corner stores, gas-marts, dollar stores and pharmacies). The present study aimed to: (i) describe customer characteristics, shopping frequency and reasons for shopping at small and non-traditional food retailers; and (ii) describe food/beverage purchases and their nutritional quality, including differences across store type. DESIGN: Data were collected through customer intercept interviews...
September 19, 2016: Public Health Nutrition
Franck Le Navéaux, A Noelle Larson, Hubert Labelle, Xiaoyu Wang, Carl-Éric Aubin
BACKGROUND: Optimal implant densities and configurations for thoracic spine instrumentation to treat adolescent idiopathic scoliosis remain unknown. The objective was to computationally assess the biomechanical effects of implant distribution on 3D curve correction and bone-implant forces. METHODS: 3D patient-specific biomechanical spine models based on a multibody dynamic approach were created for 9 Lenke 1 patients who underwent posterior instrumentation (main thoracic Cobb: 43°-70°)...
September 9, 2016: Clinical Biomechanics
Xin Zheng, Bang-Ping Qian, Zhen Liu, Xu Sun, Ze-Zhang Zhu, Bin Wang, Yang Yu, Yong Qiu
STUDY DESIGN: Retrospective study. OBJECTIVE OF THE STUDY: The objective was to investigate the effect of apical pedicle screw placement on surgical outcomes of Lenke 1 adolescent idiopathic scoliosis (AIS). SUMMARY OF THE BACKGROUND DATA: Pedicle screw instrumentation achieves satisfactory correction of scoliosis in thoracic AIS patients, but the effect of apical screw placement is unclear. MATERIALS AND METHODS: Lenke 1 AIS patients with all pedicle screw instrumentation between January 2009 and January 2011 were reviewed...
September 10, 2016: Clinical Spine Surgery
M K Kwan, Cyw Chan
BACKGROUND CONTEXT: With an increased cost of AIS surgery over the past 10 years, improvement of patient safety and optimize the surgical management of AIS is a need. A dual attending surgeon strategy resulted in reduction of blood loss and complication rate. PURPOSE: To investigate the peri-operative outcome of posterior selective thoracic fusion in Lenke 1 and 2 Adolescent Idiopathic Scoliosis (AIS) patients comparing a single versus a dual attending surgeon strategy...
September 5, 2016: Spine Journal: Official Journal of the North American Spine Society
Jeffrey L Gum, Leah Y Carreon, Jacob M Buchowski, Lawrence G Lenke, Steven D Glassman
BACKGROUND: Increased awareness regarding the importance of the sagittal spinal profile has led to more aggressive correction of sagittal malalignment. The utilization trends of pedicle subtraction osteotomy (PSO) for sagittal plane correction in spinal deformity surgery have not been well characterized. METHODS: A commercially available database (PearlDiver, Inc) was queried for both Private Payor and 5 % Medicare claims from 2008 to 2011. Revision and clarification of the coding guidelines for PSO were introduced in 2008...
2016: Scoliosis and Spinal Disorders
Maximilian C Kriegmair, Philipp Mandel, Anett Moses, Julia Lenk, Martin Rothamel, Johannes Budjan, Maurice S Michel, Nina Wagener, Daniel Pfalzgraf
BACKGROUND: Nephrometry scores are designed for standardized reporting of renal tumors and predicting complications. Multiple scores are available, but there is a lack of systematic comparison. PATIENTS AND METHODS: A total of 305 consecutive patients admitted for open partial nephrectomy to 2 urological hospitals were prospectively assessed. Five cases with conversion to radical nephrectomy were excluded from further analysis. RENAL, PADUA, C-index, and NePhRO scores were obtained from preoperative sectional imaging...
August 8, 2016: Clinical Genitourinary Cancer
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