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Rod Fracture

James A Pollard, David C Rose
Hydraulic fracturing has provided a persistent, polarizing, and highly politicized source of controversy internationally and in numerous national contexts for just under a decade. This research uses hydraulic fracturing (i.e., fracking) operations in New Zealand as a vignette through which to understand the underlying causes of controversy and the appropriateness of attempts to address them. A multi-method approach using interviews (n = 25), diagrammatic analysis, and newsprint media was applied to evidence two major findings...
August 15, 2018: Risk Analysis: An Official Publication of the Society for Risk Analysis
Ronald H Heisser, Vishal P Patil, Norbert Stoop, Emmanuel Villermaux, Jörn Dunkel
Fracture fundamentally limits the structural stability of macroscopic and microscopic matter, from beams and bones to microtubules and nanotubes. Despite substantial recent experimental and theoretical progress, fracture control continues to present profound practical and theoretical challenges. While bending-induced fracture of elongated rod-like objects has been intensely studied, the effects of twist and quench dynamics have yet to be explored systematically. Here, we show how twist and quench protocols may be used to control such fracture processes, by revisiting Feynman's observation that dry spaghetti typically breaks into three or more pieces when exposed to large pure bending stresses...
August 13, 2018: Proceedings of the National Academy of Sciences of the United States of America
Guangzhou Li, Qing Wang, Hao Liu, Ying Hong
No abstract text is available yet for this article.
August 9, 2018: World Neurosurgery
Ettore Vulcano, Jonathan S Markowitz, Shabaz Ali, Joseph Nguyen, Austin T Fragomen, S Robert Rozbruch
INTRODUCTION: Premature full weight bearing after femur lengthening can lead to implant failure, telescopic nail shortening, and regenerate fracture. This study aimed at performing a retrospective analysis of the correlation between pixel density ratio (PDR) calculations and clinical readiness for weight bearing in patients undergoing intramedullary nail-mediated femoral distraction osteogenesis. METHODS: Thirty-two patients who underwent antegrade femur lengthening were included in this study...
July 30, 2018: Journal of the American Academy of Orthopaedic Surgeons
Jae-Woo Cho, Jinil Kim, Won-Tae Cho, William T Kent, Hyung-Jin Kim, Jong-Keon Oh
INTRODUCTION: Local delivery of high dose antibiotics in the form of antibiotic impregnated polymethyl methacrylate (PMMA) cement beads or coated rods is commonly used in the management of long bone infections. The downsides of antibiotic cement beads for intramedullary long bone infections are associated with difficulty in removal from the medullary canal, bead breakage, and lack of stability. Antibiotic cement-coated smooth flexible guide wires, rods and nails can have complications such as delamination or debonding of the cement...
July 24, 2018: Injury
Qinpeng Zhao, Haiping Zhang, Dingjun Hao, Hua Guo, Biao Wang, Baorong He
Percutaneous pedicle screw fixation (PPSF) has been a popular approach for treating thoracolumbar and lumbar fracture, and its relevant complications have been gradually recognized. This study aimed to summarize the complications of PPSF in treating thoracolumbar and lumbar fracture as well as the management and outcomes of the complications.We retrospectively analyzed the patients with thoracolumbar and lumbar fracture who were admitted to our department from February 2011 to February 2015 and underwent posterior PPSF...
July 2018: Medicine (Baltimore)
Ka Yee Cheuk, Xiao-Fang Wang, Ji Wang, Zhendong Zhang, Fiona Wai Ping Yu, Elisa Man Shan Tam, Vivian Wing Yin Hung, Wayne Yuk Wai Lee, Ali Ghasem-Zadeh, Roger Zebaze, Tracy Y Zhu, X Edward Guo, Jack Chun Yiu Cheng, Tsz Ping Lam, Ego Seeman
Distal forearm fractures during growth are more common in males than females. Because metaphyseal cortical bone is formed by coalescence of trabeculae emerging from the periphery of the growth plate, we hypothesized that the later onset of puberty in males produces a longer delay in trabecular bone formation and coalescence, which leaves a transient phase of high cortical porosity, low matrix mineral density, and high trabecular density relative to females. We quantified the nondominant distal radial microstructure using high-resolution peripheral quantitative computed tomography in 214 healthy Chinese boys and 219 Chinese girls aged between 7 and 17 years living in Hong Kong...
July 12, 2018: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
Seidu A Richard, Chang Wei Zhang, Cong Wu, Wang Ting, Xie Xiaodong
Introduction: Penetrating neck injuries (PNI) are common and associated with arterial and other neuronal injuries. Although many authors have written on penetrating and blunt carotid artery injuries as a result of PNI or traumatic neck injuries, no one has reported a case or case series on PNI that resulted in blunt carotid dissection and stenosis. Case Presentation: We present a case of 40-year-old building and construction male worker who slipped and fell on an iron rod that resulted in penetrating wound on the right side of the anterior neck a week prior to presenting at our facility...
2018: Case Reports in Vascular Medicine
Kimiya Miyake, Yoshihiro Hirata, Taro Shimonosono, Soichiro Sameshima
Alumina particles with different shapes, such as sphere, rod, and disk, were examined for the sintering behavior and compressive strength of partially sintered porous alumina. While both the spherical and disk-like particles were packed well to the relative density of 61.2⁻62.3%, the packing density of rod-like particles was only 33.5%. The sintering rate of alumina particles increased in the order of disk < rod < sphere. The compressive strength of sintered porous alumina was higher for the spherical particles than for the rod-like and disk-like particles...
July 4, 2018: Materials
Mahim Jain, Allison Tam, Jay R Shapiro, Robert D Steiner, Peter A Smith, Michael B Bober, Tracy Hart, David Cuthbertson, Jeff Krischer, Mary Mullins, Sunil Bellur, Peter H Byers, Melanie Pepin, Michaela Durigova, Francis H Glorieux, Frank Rauch, Brendan Lee, V Reid Sutton, Sandesh C S Nagamani
PURPOSE: Osteogenesis imperfecta (OI) predisposes people to recurrent fractures, bone deformities, and short stature. There is a lack of large-scale systematic studies that have investigated growth parameters in OI. METHODS: Using data from the Linked Clinical Research Centers, we compared height, growth velocity, weight, and body mass index (BMI) in 552 individuals with OI. Height, weight, and BMI were plotted on Centers for Disease Control and Prevention normative curves...
July 4, 2018: Genetics in Medicine: Official Journal of the American College of Medical Genetics
Hongwei Wang, Zhongjun Mo, Jianda Han, Jun Liu, Changqing Li, Yue Zhou, Liangbi Xiang, Lei Yang
Intermediate screw fixation at the fracture level has been widely accepted to treat thoracolumbar burst fractures, but no study has shown the effect of the extent and location of fixation. The effect of the extent and location of fixation on short- or long-segment pedicle screw fixation through intermediate screw fixation at the fracture level in the treatment of thoracolumbar burst fractures is discussed.Posterior intermediate screw fixation techniques in treating T12 vertebral fracture models were simulated and compared using finite element methods; the fixation techniques included M3-L1 (bilateral 3 monoaxial pedicle screw fixation from L1 to T11), M3-L2, M4-L1 (bilateral 4 monoaxial pedicle screw fixation from L1 to T10), M4-L2, M4-L3, and M5-L2 (bilateral 5 monoaxial pedicle screw fixation from L2 to T10)...
June 2018: Medicine (Baltimore)
Jessica Starr, Yu Kwang Donovan Tay, Elizabeth Shane
PURPOSE OF REVIEW: To summarize reports published since the 2013 American Society of Bone and Mineral Research Task Force Report on atypical femoral fractures (AFF). RECENT FINDINGS: The absolute incidence of AFFs remains low. AFFs are primarily associated with prolonged bisphosphonate (BP) exposure, but have also been reported in unexposed patients and those receiving denosumab for osteoporosis and metastatic bone disease. Asians may be more susceptible to AFFs...
August 2018: Current Osteoporosis Reports
Dong Kwang Seo, Chung Hwan Kim, Sang Ku Jung, Moon Kyu Kim, Soo Jung Choi, Jin Hoon Park
Objective: The aims in the management of thoracolumbar spinal fractures are not only to restore vertebral column stability, but also to obtain acceptable alignment of the thoracolumbar junction (T-L junction) to prevent complications. However, insufficient surgical correction of the thoracolumbar spine would be likely to cause late progression of abnormal kyphosis. Therefore, we identified the surgical factors that affected unfavorable radiologic outcomes of the thoracolumbar spine after surgery...
June 26, 2018: Journal of Korean Neurosurgical Society
David E Westberry, Ashley M Carpenter, Jocelyn Tisch, Linda I Wack
BACKGROUND: Successful radiographic union in the treatment of congenital pseudarthrosis of the tibia (CPT) may be complicated by persistent pain, recurrent fracture, and poor function necessitating further intervention, including amputation. The long-term functional, radiographic, and clinical outcomes of patients who have undergone amputation as treatment for CPT are unknown. METHODS: A retrospective study of patients with a diagnosis of CPT secondary to neurofibromatosis and eventual treatment with amputation were included...
June 22, 2018: Journal of Pediatric Orthopedics
Marcelo D Vilela, Bruno P Braga, Hugo A S Pedrosa
Background: Iliac screw placement is challenging due to the particular anatomy of the ilium. Most series have reported the use of relatively short (≤90 mm in length) screws despite a long iliac buttress, which has an average length of 129 mm in females and 141 mm in males. This study describes a series of 14 patients who underwent placement of long iliac screws (≥100 mm in length) as part of a spinopelvic fusion utilizing fluoroscopy alone. Methods: All patients who received at least one long iliac screw were included in this study...
2018: Surgical Neurology International
Alan H Daniels, J Mason DePasse, Wesley Durand, D Kojo Hamilton, Peter Passias, Han Jo Kim, Themistocles Protopsaltis, Daniel B C Reid, Virginie LaFage, Justin S Smith, Christopher Shaffrey, Munish Gupta, Eric Klineberg, Frank Schwab, Doug Burton, Shay Bess, Christopher Ames, Robert A Hart
BACKGROUND: Rod fracture occurs with delayed fusion or pseudarthrosis after adult spinal deformity (ASD) surgery. Rod fracture after apparent radiographic fusion has not been previously investigated. METHODS: Patients with ASD in a multicenter database were assessed for radiographic fusion by a committee of 3 spinal deformity surgeons. Fusions were rated as bilaterally fused (A), unilaterally fused (B), partially fused (C), or not fused (D). Patients with grade A or B fusion and 2-year follow-up were included...
June 19, 2018: World Neurosurgery
Soichi Hirashima, Akihiko Miyawaki, Kotaro Oho, Yawaka Shitozawa, Motohiro Arai, Norihiko Furuta, Ryoichi Oya
Peritoneal dialysis can be performed at home, and the transfer of solutes in the blood and other body fluids is slow compared to hemodialysis, reducing the load on the circulatory organs and lessening the frequency of hospital visits. We encountered a male patient in his 70s on peritoneal dialysis for end-stage renal failure who developed obsolete mandibular fracture-associated pseudarthrosis accompanied by osteomyelitis, which was treated with noninvasive reduction and fixation using circumferential wiring after the resolution of inflammation...
2018: Journal of UOEH
Seyed Amir Oleyaei, Seyed Mohammad Ali Razavi, Kirsi S Mikkonen
Sage seed gum (SSG) is a promising biopolymer candidate for utilization and substitution prevalent galactomannan gels of interest in soft biomaterial applications. Herein, physicochemical and rheo-mechanical properties of SSG matrix reinforced by various titanium dioxide (TiO2 ) nanoparticles loading (0-25wt%) were monitored. Particle size and density of the nanocomposite increased with raising TiO2 content, due to the creation of more compact agglomerated and aggregated microstructure. Increasing the particle size resulted in lower electrophoretic mobility of SSG-TiO2 systems upon nanoparticles addition, confirmed the adsorption of TiO2 on the SSG macromolecule...
June 18, 2018: International Journal of Biological Macromolecules
Wenli Chang, Dianling Zhang, Wei Liu, Xiaodong Lian, Zhenqing Jiao, Wei Chen
BACKGROUND: This randomized controlled trial (RCT) aimed to compare the clinical outcomes of thoracolumbar burst fractures (TLBFs) treated with open reduction and internal fixation via the posterior paraspinal muscle approach (PPMA) and the post-middle approach (PA). METHODS: Patients with a traumatic single-level TLBFs (T10-L2), treated at our hospital between December 2009 and December 2014, were randomly allocated to Group A (PPMA) and Group B (PA). Sex, age, time from injury to surgery, the American Spinal Injury Association Impairment Scale score (ASIAIS), comorbidities, vertebral level, pre- and postoperative kyphotic angle (KA), visual analog scale (VAS) pain score, and the Oswestry Disability Index (ODI) scores were included in the analysis...
June 2018: Medicine (Baltimore)
Mu Qiao, Bang-Ping Qian, Shi-Zhou Zhao, Yong Qiu, Bin Wang, Jun Jiang
OBJECTIVE: To compare the efficacy of long and short segment instrumentation after pedicle subtraction osteotomy (PSO) for thoracolumbar kyphosis caused by ankylosing spondylitis (AS). METHODS: Sixty-four consecutive AS patients were analyzed and divided into groups according to length of instrumentation. We defined short segment instrumentation (SSI) as construct length <7 levels (≤3 levels above and below the osteotomy) (n = 17). By contrast, long segment instrumentation (LSI) was defined as construct length ≥7 levels (≥4 levels above and ≥3 levels below the osteotomy) (n = 47)...
June 18, 2018: World Neurosurgery
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