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https://www.readbyqxmd.com/read/29334957/vertebral-column-decancellation-in-pott-s-deformity-use-of-surgimap-spine-for-preoperative-surgical-planning-retrospective-review-of-18-patients
#1
Wenhao Hu, Xuesong Zhang, Jiayi Yu, Fanqi Hu, Hao Zhang, Yan Wang
BACKGROUND: In the late stage of Spinal tuberculosis, the bony destruction and vertebral collapse often leads to significant kyphosis, presenting clinically as a painful gibbus deformity, with increased instability, vertebral body translations and increased risk of neurologic involvement. Vertebral column decancellation is thought to be suitable for most patients with severe rigid kyphosis. Surgimap Spine, could offer a pragmatic graphical method for the surgical planning of osteotomies...
January 15, 2018: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29332238/normal-variation-in-sagittal-spinal-alignment-parameters-in-adult-patients-an-eos-study-using-serial-imaging
#2
Hwee Weng Dennis Hey, Kian Loong Melvin Tan, Vikaesh Moorthy, Eugene Tze-Chun Lau, Leok-Lim Lau, Gabriel Liu, Hee-Kit Wong
PURPOSE: To describe normal variations in sagittal spinal radiographic parameters over an interval period and establish physiological norms and guidelines for which these images should be interpreted. METHODS: Data were prospectively collected from a continuous series of adult patients with first-episode mild low back pain presenting to a single institution. The sagittal parameters of two serial radiographic images taken 6-months apart were obtained with the EOS® slot scanner...
January 13, 2018: European Spine Journal
https://www.readbyqxmd.com/read/29330576/xipho-pubic-angle-xpa-correlates-with-patient-s-reported-outcomes-in-a-population-of-adult-spinal-deformity-results-from-a-multi-center-cohort-study
#3
Francesco Langella, Jorge Hugo Villafañe, Virginie Lafage, Justin S Smith, Christopher Shaffrey, Han Jo Kim, Douglas Burton, Richard Hostin, Shay Bess, Christopher Ames, Gregory Mundis, Eric Klineberg, Frank Schwab, Renault Lafage, Pedro Berjano
STUDY DESIGN: Retrospective multi-center cohort study. PURPOSE: Sagittal misalignment causes changes in the abdominal shape. Xipho-pubic angle (XPA) has been previously described to radiographically evaluate the shape of the abdominal cavity in patients with spine deformity. The aims of this study are to evaluate the correlation of XPA-to-spinopelvic sagittal parameters and to patients' health-related quality-of-life (HRQoL) scores. METHODS: 278 patients from a multi-center database with diagnosis adult spinal deformity (ASD) (one or more of: coronal Cobb angle > 20°, sagittal vertical axis (SVA) > 50 mm, pelvic tilt (PT) > 25°, and thoracic kyphosis > 60°) were included...
January 12, 2018: European Spine Journal
https://www.readbyqxmd.com/read/29322899/is-the-pelvis-stable-during-supine-total-hip-arthroplasty
#4
S M Shah, W L Walter, J Ngo
Intra- operative changes in pelvic position during total hip arthroplasty (THA) can affect acetabular orientation. We evaluated these changes during supine THA using a proprietary mobile application called PelvicTracker. Twenty- two patients undergoing THA using direct anterior approach were included in the study. In the sagittal plane, the pelvis was extended (anterior tilt) as compared to the start of surgery in 19/ 22 hips at the time of cup implantation (mean extension: 3.1°; range: 1°-6°). In the transverse plane, the pelvis was rolled to the opposite side of surgery in 12 hips (mean roll: 2...
March 2017: Acta Orthopaedica Belgica
https://www.readbyqxmd.com/read/29320923/the-effect-of-seated-pelvic-tilt-on-posterior-edge-loading-in-total-hip-arthroplasty-a-finite-element-investigation
#5
Jim Pierrepont, Long Yang, Jevan Arulampalam, Catherine Stambouzou, Brad Miles, Qing Li
Edge-loading of a ceramic-on-ceramic total hip replacement can lead to reproducible squeaking and revision. A patient's functional acetabular cup orientation, driven by their pelvic tilt, has been shown to be a significant factor in squeaking during hip flexion. The aim of this study was to investigate the effect of seated pelvic tilt on the contact mechanics at the ceramic bearing surface. A finite element model of a ceramic-on-ceramic total hip replacement was created. The cup was orientated at 40° inclination and 15° anteversion relative to the anterior pelvic plane...
January 1, 2018: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/29317155/compensatory-mechanism-of-the-spine-after-corrective-surgery-without-lumbar-sacral-fixation-for-traumatic-thoracolumbar-kyphotic-spine-deformity
#6
Koji Matsumoto, Masahiro Hoshino, Keita Omori, Hidetoshi Igarashi, Takashi Tsuruta, Koji Yamasaki, Hiromi Matsuzaki, Takanori Iriuchishima, Yasuaki Tokuhashi
BACKGROUND: It remains unclear whether long fusion including lumbar-sacral fixation is needed in corrective surgery to obtain good global sagittal balance (GSB) for the treatment of traumatic thoracolumbar kyphotic spine deformity. The purposes of this study were to evaluate compensatory mechanism of the spine after corrective surgery without lumbar-sacral fixation and to evaluate the parameters affecting the achievement of good GSB post-operatively. METHODS: Twenty (20) subjects requiring corrective surgery (distal end of fixation was L3) were included in this study...
January 6, 2018: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/29315120/ethnic-variations-in-radiographic-parameters-and-srs-22-scores-in-adult-spinal-deformity-a-comparison-between-north-american-and-japanese-patients-above-50-years-of-age-with-minimum-2-year-follow-up
#7
Naobumi Hosogane, Christopher Ames, Morio Matsumoto, Mitsuru Yagi, Yukihiro Matsuyama, Hiroshi Taneichi, Yu Yamato, Daisaku Takeuchi, Frank Schwab, Christopher Shaffrey, Justin S Smith, Shay Bess, Virginie Lafage
STUDY DESIGN: Retrospective review of North American and Japanese adult spinal deformity (ASD) database. OBJECTIVE: To investigate the ethnical differences in radiographic parameters and Scoliosis Research Society (SRS)-22 between North American and Japanese ASD. SUMMARY OF BACKGROUND DATA: Previous comparison study between North American and Japanese ASD patients has revealed Japanese patients had marked pelvic tilt deformity and had lower Oswestry Disability Index scores corresponding to established thresholds of radiographic deformity...
January 8, 2018: Clinical Spine Surgery
https://www.readbyqxmd.com/read/29310920/total-hip-arthroplasty-patients-with-fixed-spinopelvic-alignment-are-at-higher-risk-of-hip-dislocation
#8
Christina I Esposito, Kaitlin M Carroll, Peter K Sculco, Douglas E Padgett, Seth A Jerabek, David J Mayman
BACKGROUND: Sitting radiographs have been used as a pre-operative tool to plan patient-specific total hip arthroplasty (THA) component position that would improve hip stability. Previous work has demonstrated that spinal mobility may impact functional acetabular position when seated. We sought to determine whether patients who dislocate following THA have different sitting spinopelvic alignment or acetabular component orientation compared to patients who did not dislocate. METHODS: A consecutive series of 1000 patients underwent post-operative low-dose biplanar spine-to-ankle lateral radiographs in standing and sitting positions 1 year following THA...
December 13, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29298262/body-mass-index-affects-proximal-femoral-but-not-acetabular-morphology-in-adolescents-without-hip-pathology
#9
Eduardo N Novais, Sandra J Shefelbine, Karl-Philipp Kienle, Patricia E Miller, Garrett Bowen, Young-Jo Kim, Sarah D Bixby
BACKGROUND: Increased mechanical load secondary to a large body mass index (BMI) may influence bone remodeling. The purpose of this study was to investigate whether BMI is associated with the morphology of the proximal part of the femur and the acetabulum in a cohort of adolescents without a history of hip disorders. METHODS: We evaluated pelvic computed tomographic (CT) images in 128 adolescents with abdominal pain without a history of hip pathology. There were 44 male patients (34%) and the mean patient age (and standard deviation) was 15 ± 1...
January 3, 2018: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/29290133/assessment-of-radiographic-and-clinical-outcomes-of-an-articulating-expandable-interbody-cage-in-minimally-invasive-transforaminal-lumbar-interbody-fusion-for-spondylolisthesis
#10
Lara W Massie, Hesham Mostafa Zakaria, Lonni R Schultz, Azam Basheer, Morenikeji Ayodele Buraimoh, Victor Chang
OBJECTIVE The inability to significantly improve sagittal parameters has been a limitation of minimally invasive surgery for transforaminal lumbar interbody fusion (MIS TLIF). Traditional cages have a limited capacity to restore lordosis. This study evaluates the use of a crescent-shaped articulating expandable cage (Altera) for MIS TLIF. METHODS This is a retrospective review of 1- and 2-level MIS TLIF. Radiographic outcomes included differences in segmental and lumbar lordosis, disc height, evidence of fusion, and any endplate violations...
January 2018: Neurosurgical Focus
https://www.readbyqxmd.com/read/29285943/-assessment-of-sacroiliacal-joint-mobility-in-patients-with-low-back-pain
#11
Máté Burkus, István Márkus, Bálint Niklai, Miklós Tunyogi-Csapó
INTRODUCTION: Sagittal alignment of the pelvis is typically characterized using three fundamental parameters. Among these, pelvic incidence is traditionally considered to be anatomically 'constant'. AIM: We aimed to analyze the pelvic parameters of low back pain patients with suspected sacroiliac joint laxity. METHOD: Pelvic parameters were assessed in standing and seated EOS 2D/3D radiographs of 48 cases of persistent low back pain, and compared to upper body position using cluster analysis and t-test...
December 2017: Orvosi Hetilap
https://www.readbyqxmd.com/read/29281113/complication-rates-and-maintenance-of-correction-after-3-column-osteotomy-in-the-elderly-report-of-55-patients-with-2-year-follow-up
#12
Vincent Challier, Jensen K Henry, Shian Liu, Christopher Ames, Khaled Kebaish, Ibrahim Obeid, Richard Hostin, Munish Gupta, Oheneba Boachie-Adjei, Justin S Smith, Gregory Mundis, Shay Bess, Frank Schwab, Virginie Lafage
BACKGROUND: Three-column osteotomies (3CO) provide substantial correction for adult spinal deformity (ASD), but carry risks of complications and revisions. The risk-benefit balance of 3CO in the elderly remains unclear. OBJECTIVE: To evaluate sagittal alignment and complications after 3CO in a population over 70-yr old. METHODS: Radiographic retrospective review of consecutive patients over 70 yr ("Elderly") undergoing 3CO for ASD. Demographic, operative, and outcomes data were collected...
December 21, 2017: Neurosurgery
https://www.readbyqxmd.com/read/29279754/assessment-of-the-relationship-between-pelvic-tilt-and-the-sacro-femoral-pubic-angle-in-middle-aged-and-elderly-asian-individuals
#13
Takanori Kitagawa, Yoichi Iizuka, Hiroki Kobayashi, Tokue Mieda, Daisuke Tsunoda, Atsushi Yamamoto, Tsuyoshi Tajika, Haku Iizuka, Kenji Takagishi
Study Design: Cross-sectional study. Purpose: The purpose of this study was to evaluate the correlation between pelvic tilt (PT) and the sacro-femoral-pubic (SFP) angle, which is easier to identify than PT, in middle-aged and elderly Asian subjects from the general population. Overview of Literature: Measuring PT is important in the diagnosis and treatment of adult spinal deformity. However, identifying femoral heads, which are necessary to determine PT, using sagittal radiographs is often difficult...
December 2017: Asian Spine Journal
https://www.readbyqxmd.com/read/29279752/difference-in-spinal-sagittal-alignment-and-health-related-quality-of-life-between-males-and-females-with-cervical-deformity
#14
Shin Oe, Daisuke Togawa, Go Yoshida, Tomohiko Hasegawa, Yu Yamato, Sho Kobayashi, Tatsuya Yasuda, Tomohiro Banno, Yuki Mihara, Yukihiro Matsuyama
Study Design: Large cohort study. Purpose: To clarify spinal sagittal alignment and health-related quality of life (HRQOL) according to sex in volunteers aged >50 years with cervical deformity (CD). Overview of Literature: Adult spinal deformities, especially those associated with lumbosacral lesions, are more frequent in females; however, CD is observed to a greater extent in males. Methods: We divided 656 volunteers (263 males, 393 females; age, 50-89 years [mean, 73 years]) as follows: males with CD (CDM; 82 patients); males without CD (NCDM, 181); females with CD (CDF, 36); and females without CD (NCDF, 357)...
December 2017: Asian Spine Journal
https://www.readbyqxmd.com/read/29277060/does-additional-patella-tendon-shortening-influence-the-effects-of-multilevel-surgery-to-correct-flexed-knee-gait-in-cerebral-palsy-a-randomized-controlled-trial
#15
M C M Klotz, Britta K Krautwurst, K Hirsch, M Niklasch, M W Maier, S I Wolf, T Dreher
BACKGROUND: The aims of this study were to investigate if patellar tendon shortening (PTS) as a part of SEMLS (single event multilevel surgery) is effective for reduction of flexed knee gait in children with cerebral palsy (CP) and, if PTS leads to stiff knee gait. METHODS: In a randomized controlled study 22 children with flexed knee gait (age: 10.4 ± 2.6 years, GMFCS Level I-III) were randomized and allocated to two groups (1: SEMLS + PTS; 2: SEMLS no PTS): SEMLS was performed for correction of flexed knee gait either with or without additional PTS...
December 5, 2017: Gait & Posture
https://www.readbyqxmd.com/read/29276116/effect-of-pelvic-tilt-and-rotation-on-cup-orientation-in-both-supine-and-standing-positions
#16
Hohyun Yun, William S Murphy, Daniel M Ward, Guoyan Zheng, Brett Hayden, Stephen B Murphy
BACKGROUND: The purpose of this study is to analyze the effect of pelvic tilt and rotation on radiographic measurement of cup orientation. METHODS: A total of 68 patients (79 hips) were included in this study. The patients had a computed tomography study and approximately 3 months of postoperative standing anteroposterior pelvic radiographs in both supine and standing positions. We used 2-dimensional (2D)/3-dimensional (3D) matching to measure pelvic tilt and rotation, and cup orientation...
December 6, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29248191/manipulating-post-stroke-gait-exploiting-aberrant-kinematics
#17
Megan E Reissman, Keith E Gordon, Yasin Y Dhaher
Post-stroke individuals often exhibit abnormal kinematics, including increased pelvic obliquity and hip abduction coupled with reduced knee flexion. Prior examinations suggest these behaviors are expressions of abnormal cross-planar coupling of muscle activity. However, few studies have detailed the impact of gait-retraining paradigms on three-dimensional joint kinematics. In this study, a cross-tilt walking surface was examined as a novel gait-retraining construct. We hypothesized that relative to baseline walking kinematics, exposure to cross-tilt would generate significant changes in subsequent flat-walking joint kinematics during affected limb swing...
December 6, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29247396/the-mechanism-in-junctional-failure-of-thoraco-lumbar-fusions-part-ii-analysis-of-a-series-of-pjk-after-thoraco-lumbar-fusion-to-determine-parameters-allowing-to-predict-the-risk-of-junctional-breakdown
#18
Antonio A Faundez, Jonathon Richards, Philippe Maxy, Rachel Price, Amélie Léglise, Jean-Charles Le Huec
PURPOSE: To identify risk factors, in 12 patients with junctional breakdown (JBD) after thoraco-sacral fusions and to test a software locating maximal bending moment on full spine EOS images. METHODS: Twelve patients underwent long fusions for lumbar degenerative pathologies. Preop EOS images were compared to first postop EOS showing JBD. Parameters analyzed were: spinopelvic parameters [pelvic incidence (PI), pelvic tilt (PT), sacral slope (SS), sagittal vertical axis (SVA), spinosacral angle (SSA), lordosis, and kyphosis], proximal junctional angle (PJA), odontoid-hip axis angle (ODHA), and CIA...
December 15, 2017: European Spine Journal
https://www.readbyqxmd.com/read/29245239/predictors-of-ultimate-postoperative-cervical-sagittal-alignment-in-main-thoracic-adolescent-idiopathic-scoliosis-a-long-term-follow-up-study
#19
Zhen Zhang, Zhen Liu, Zezhang Zhu, Yong Qiu
This is a retrospective study. The aim of this study was to access sagittal compensatory mechanism of the cervical spine in thoracic adolescent idiopathic scoliosis (T-AIS) before and after posterior spinal fusion and to identify preoperative or immediate postoperative radiographic parameters that can predict the ultimate cervical sagittal alignment (CSA) after long-term follow-up.A retrospective study was performed on 44 T-AIS patients treated with posterior spinal fusion and with at least 5 years of follow-up...
December 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29245096/pre-and-post-operative-evaluation-of-pincer-type-femoroacetabular-impingement-during-squat-using-image-matching-techniques-a-case-report
#20
Kensei Yoshimoto, Satoshi Hamai, Hidehiko Higaki, Hirotaka Gondo, Satoru Ikebe, Yasuharu Nakashima
INTRODUCTION: Although combined evaluation of hip joint kinematics and bone morphology is necessary for accurate assessment of femoroacetabular impingement (FAI), there are no report which evaluated hip kinematics of pincer-type FAI. PRESENTATION OF CASE: The pre- and postoperative hip kinematics of a 46-year-old man, with a pincer-type FAI during squat were evaluated using image-matching techniques and the rim-neck distance was measured. Preoperative simulation of squatting was also performed using patient's bone models and healthy subject's kinematics data to detect the overlapping lesion between the acetabulum and the femur...
December 8, 2017: International Journal of Surgery Case Reports
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