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Rod Fracture

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https://www.readbyqxmd.com/read/30335630/the-healing-rate-of-type-ii-odontoid-fractures-treated-with-posterior-atlantoaxial-screw-rod-fixation-a-retrospective-review-of-77-patients
#1
Da-Geng Huang, Xin-Liang Zhang, Ding-Jun Hao, Bao-Rong He, Xiao-Dong Wang, Tuan-Jiang Liu
BACKGROUND: In theory, temporary posterior atlantoaxial screw-rod fixation for type II odontoid fractures is a way to preserve rotatory motion. However, the healing rate of type II odontoid fractures treated in this way is unknown; that is, the risk associated with conducting a temporary screw-rod fixation for type II odontoid fractures is unknown. This study investigates the healing rate of type II odontoid fractures treated with posterior atlantoaxial screw-rod fixation by CT imaging and evaluates the feasibility of conducting a temporary screw-rod fixation for type II odontoid fractures...
October 17, 2018: Journal of the American Academy of Orthopaedic Surgeons
https://www.readbyqxmd.com/read/30322251/impact-of-screw-type-on-kyphotic-deformity-correction-after-spine-fracture-fixation-cannulated-versus-solid-pedicle-screw
#2
Mahmood Ali Arbash, Ashik Mohsin Parambathkandi, Abdul Moeen Baco, Abduljabbar Alhammoud
Study Design: Retrospective review. Purpose: To detect the effect of cannulated (poly-axial head) and solid (mono-axial head) screws on the local kyphotic angle, vertebral body height, and superior and inferior angles between the screw and the rod in the surgical management of thoracolumbar fractures. Overview of Literature: Biomechanics studies showed that the ultimate load, yield strength, and cycles to failure were significantly lower with cannulated (poly-axial head) pedicle comparing to solid core (mono-axial head)...
October 16, 2018: Asian Spine Journal
https://www.readbyqxmd.com/read/30279258/advancement-of-the-harrington-technique-for-reconstruction-of-pathological-fractures-of-the-acetabulum
#3
Ross Coomber, D'Jon Lopez, Andrew D Carrothers
A 59-year-old man presented with hip pain secondary to metastatic prostate carcinoma affecting multiple sites, including his left acetabulum. The patient's prognosis was good, he was active, independent, with a good quality of life, so was offered surgical reconstruction. The Harrington method involves passing metal rods from the ileum to the ischium and pubis to create a scaffold for hip replacement. This is the gold standard for reconstruction of acetabular metastatic defects. However, this method is prone to failure by medialisation of the construct in the long term...
October 2, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/30277847/micro-architecture-study-of-the-normal-odontoid-with-micro-computed-tomography
#4
Wei Wang, Zhijun Li, Yingna Qi, Lianxiang Chen, Ping Yi, Feng Yang, Xiangsheng Tang, Mingsheng Tan
INTRODUCTION: Odontoid fractures easily lead to instability, causing spinal cord injury. The aim of this study was to measure and analyze the micro-architecture and morphometric parameters of the normal odontoid with high-resolution three-dimensional (3D) micro-computed tomography (micro-CT). METHODS: Micro-CT scans were obtained from five normal odontoid processes. The scanned data were reconstructed with micro-CT software, and the nutrient foramina and the ossification center of the base of the odontoid were revealed...
October 2, 2018: Journal of Spinal Cord Medicine
https://www.readbyqxmd.com/read/30276079/polyetheretherketone-peek-rods-for-lumbar-fusion-a-systematic-review-and-meta-analysis
#5
Abdulhafez Selim, Sarah Mercer, Feng Tang
Background: The purpose of this systematic review is to evaluate the safety and effectiveness of polyetheretherketone (PEEK) rod systems in patients receiving lumbar interbody fusion treatment. Meta-analyses of relevant clinical data were also conducted when possible. Methods: Relevant studies were identified by searching the PubMed, EMBASE, and Cochrane Library databases. Clinical studies evaluating the safety and/or effectiveness of the PEEK rod spinal stabilization system in patients receiving lumbar spinal fusion procedure were included...
April 2018: International Journal of Spine Surgery
https://www.readbyqxmd.com/read/30266406/-dangerous-duo-chronic-nicotine-exposure-intensifies-diabetes-mellitus-related-deterioration-in-bone-microstructure-an-experimental-study-in-rats
#6
Petar Milovanovic, Marko Stojanovic, Djordje Antonijevic, Aleksandar Cirovic, Miroslav Radenkovic, Marija Djuric
AIMS: Bony complications of diabetes mellitus (DM) are still insufficiently understood. Our aims were to analyze the individual and combined effects of chronic hyperglycemia and nicotine exposure on the femoral trabecular and cortical microarchitecture on a rat experimental model. MAIN METHODS: The micro-computed tomography based bone microstructural evaluation was performed on male Wistar rats divided into four groups: control (n = 7), experimentally-induced DM (n = 8), chronically exposed to nicotine (n = 9) and the DM group exposed chronically to nicotine (n = 9)...
September 25, 2018: Life Sciences
https://www.readbyqxmd.com/read/30235471/veterinary-cuttable-plate-in-a-plate-rod-construct-for-repair-of-diaphyseal-femoral-fractures-in-the-cat
#7
Bertrand Vedrine, Fabien Gérard
OBJECTIVE:  This study evaluated retrospectively the effectiveness of the veterinary cuttable plate (VCP) in a plate-rod construct, for the treatment of diaphyseal femoral fractures in cats. MATERIALS AND METHODS:  A total of 29 cats with diaphyseal femoral fracture underwent stabilization with a VCP-rod construct. RESULTS:  Fractures were classified as type A (7/29), type B (11/29) and type C (11/29) following the AO classification...
September 20, 2018: Veterinary and Comparative Orthopaedics and Traumatology: V.C.O.T
https://www.readbyqxmd.com/read/30234804/biomechanical-comparison-of-c1-lateral-mass-c2-short-pedicle-screw-c3-lateral-mass-screw-rod-construct-versus-goel-harms-fixation-for-atlantoaxial-instability
#8
Young Lu, Yu-Po Lee, Nitin N Bhatia, Thay Q Lee
STUDY DESIGN: A biomechanical in vitro study using human cadaveric spines. OBJECTIVE: To compare atlantoaxial stability and stiffness of a C1 lateral mass - C2 short pedicle - C3 lateral mass screw-rod construct versus C1 lateral mass - C2 pedicle screw-rod construct. SUMMARY OF BACKGROUND DATA: The C1 lateral mass - C2 pedicle screw-rod construct provides excellent atlantoaxial fixation but C2 pedicle screw placement is associated with risk of vertebral artery injury...
September 17, 2018: Spine
https://www.readbyqxmd.com/read/30233955/the-pelvic-bridge-a-subcutaneous-approach-for-anterior-pelvic-fixation
#9
Peter A Cole, Daniel K Hesse, Anthony J Dugarte, Evgeny Dyskin
Introduction: An alternative method to external fixation for the treatment of unstable anterior pelvic ring injuries, termed the pelvic bridge technique, provides equivalent results with fewer complications and is performed using occipital cervical rods subcutaneously, with fixation into the iliac wings and parasymphyseal bone. Indications & Contraindications: <AbstractText Label="Step 1 Preoperative Planning" NlmCategory="UNASSIGNED">For preoperative planning, review the appropriate imaging, including radiographs and computed tomography (CT) scans, to mesh the findings on imaging to the clinical picture of the patient and ensure that the patient meets operative criteria and that none of the contraindications are present...
September 28, 2017: JBJS Essential Surgical Techniques
https://www.readbyqxmd.com/read/30223882/minimally-invasive-treatment-for-anterior-pelvic-ring-injuries-with-modified-pedicle-screw-rod-fixation-a-retrospective-study
#10
Chun-Chi Hung, Jia-Lin Wu, Yuan-Ta Li, Yung-Wen Cheng, Chia-Chun Wu, Hsain-Chung Shen, Tsu-Te Yeh
BACKGROUND: Pelvic ring injuries constitute only 2 to 8% of all fractures; however, they occur in 20% of polytrauma patients. High-energy pelvic fractures often result in mechanical instability of the pelvic ring. Successful treatment of unstable pelvic ring fractures remains a challenge for orthopedic surgeons. This study presents a novel internal fixation method for stabilizing unstable anterior pelvic ring fractures using a minimally invasive modified pedicle screw-rod fixation (MPSRF) technique...
September 17, 2018: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/30220005/effect-of-external-fixation-rod-coupling-in-computed-tomography
#11
Carlos A Peña-Solórzano, Matthew R Dimmock, David W Albrecht, David M Paganin, Richard B Bassed, Mitzi Klein, Peter C Harris
External fixation is a common tool in the treatment of complex fractures, correction of limb deformity, and salvage arthrodesis. These devices typically incorporate radio-opaque metal rods/struts connected at varying distances and orientations between rings. Whilst the predominant imaging modality is plain film radiology, computed tomography (CT) may be performed in order for the surgeon to make a more confident clinical decision (e.g. timing of frame removal, assessment of degree of arthrodesis). We used a fractured sheep leg to systematically assess CT imaging performance with a Discovery CT750 HD CT scanner (GE Healthcare) to show how rod coupling in both traditional Ilizarov and hexapod frames distorts images...
September 15, 2018: Strategies in Trauma and Limb Reconstruction
https://www.readbyqxmd.com/read/30219359/mechanical-performance-of-traditional-distraction-based-dual-growing-rod-constructs
#12
Genevieve Hill, Srinidhi Nagaraja, Austin Bridges, Ardalan Seyed Vosoughi, Vijay K Goel, Maureen L Dreher
BACKGROUND: Growing rod constructs are an important contribution in the treatment of children with early onset scoliosis even though these devices experience high rates of rod fracture. The mechanical performance of traditional, distraction-based dual growing rod constructs is not well understood, and mechanical models for predicting device performance are limited. PURPOSE: Two mechanical models were developed and used to determine the mechanical performance of various growing rod configurations by increasing construct complexity...
September 13, 2018: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/30213160/magnetically-controlled-growing-rods-the-experience-of-mechanical-failure-from-a-single-center-consecutive-series-of-28-children-with-a-minimum-follow-up-of-2-years
#13
Alastair Beaven, Adrian C Gardner, David S Marks, Jwalant S Mehta, Matthew Newton-Ede, Jonathan B Spilsbury
STUDY DESIGN: Retrospective observational study of a continuous series of 28 children. PURPOSE: To determine the mechanical failure rate in our cohort of children treated with magnetically controlled growth rods (MCGRs). OVERVIEW OF LITERATURE: Previous studies report a MCGR mechanical failure rate of 0%-75%. METHODS: All patients with MCGR implantation between 2012 and 2015 were examined and followed up for a minimum of 2 years...
October 2018: Asian Spine Journal
https://www.readbyqxmd.com/read/30211786/variations-in-the-organisms-causing-deep-surgical-site-infections-in-fracture-patients-at-a-level-i-trauma-center-2006-2015
#14
Ryan N Montalvo, Roman M Natoli, Nathan N O'Hara, Carrie Schoonover, Peter Z Berger, G Bradley Reahl, Mark E Shirtliff, Theodore T Manson, Jesse T Torbert, Robert V O'Toole, Manjari Joshi
OBJECTIVES: To quantify the current bacteriology of deep surgical site infections (SSI) after fracture surgery at 1 institution and to compare those data with historical controls at the same institution, assessing variations in infecting organisms over the past decade. DESIGN: Retrospective review. SETTING: Level I trauma center. PATIENTS/PARTICIPANTS: Two hundred forty-three patients requiring surgical intervention for deep SSI between January 2011 and December 2015 were compared with 211 patients requiring surgical intervention for deep SSI between December 2006 and December 2010...
August 23, 2018: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/30196442/subcutaneous-internal-anterior-fixation-of-pelvis-fractures-which-configuration-of-the-infix-is-clinically-optimal-a-retrospective-study
#15
Julian Scherer, Simon Tiziani, Kai Sprengel, Hans-Christoph Pape, Georg Osterhoff
INTRODUCTION: Subcutaneous internal fixation (InFix) has become a valid alternative for anterior fixation of pelvic ring injuries. Complications associated with this technique are lateral femoral cutaneous nerve (LFCN) irritation and anterior thigh pain due to prominent implants. The aim of this study was to identify a configuration of the InFix that causes the least adverse side effects. METHODS: Nineteen patients (6 females, mean age 61 years) with 38 hemipelves were included...
September 8, 2018: International Orthopaedics
https://www.readbyqxmd.com/read/30179947/dual-interlocking-telescopic-rod-provides-effective-tibial-stabilization-in-children-with-osteogenesis-imperfecta
#16
Chang Ho Shin, Doo Jae Lee, Won Joon Yoo, In Ho Choi, Tae-Joon Cho
BACKGROUND: Interlocking telescopic rods for the management of osteogenesis imperfecta (OI)-related long bone fractures are a modification of the Sheffield rod. An interlocking pin anchors the obturator at the distal epiphysis, which spares the distal joint, while a T-piece anchors the sleeve at the proximal epiphysis. However, these devices are associated with some problems, including failure to elongate and difficulty with removal. A dual interlocking telescopic rod (D-ITR), in which the sleeve and the obturator are anchored with interlocking pins, was developed to address these problems...
August 30, 2018: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/30176027/the-generation-of-closed-femoral-fractures-in-mice-a-model-to-study-bone-healing
#17
Justin N Williams, Yong Li, Anuradha Valiya Kambrath, Uma Sankar
Bone fractures impose a tremendous socio-economic burden on patients, in addition to significantly affecting their quality of life. Therapeutic strategies that promote efficient bone healing are non-existent and in high demand. Effective and reproducible animal models of fractures healing are needed to understand the complex biological processes associated with bone regeneration. Many animal models of fracture healing have been generated over the years; however, murine fracture models have recently emerged as powerful tools to study bone healing...
August 16, 2018: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/30139001/-biomechanical-study-of-different-kinds-of-internal-fixation-for-the-type%C3%A2-hangman-fracture-type-%C3%A2-odontoid-fracture-and-the-c-2-3-disc-injury-a-finite-element-analysis
#18
Y Hu, W X Dong, J Z Xu, Z S Yuan, X Y Sun, B K Zhu, O J Lai, X G Chen, B J Zhao
Objectives: To analyze the biomechanical stability of four kinds of internal fixation for the type Ⅰ Hangman fracture, type Ⅱ odontoid fracture and the C(2/3) disc injury by finite element (FE) analysis. Methods: Thin-section spiral computed tomography (0.5 mm) was performed on C(1) to C(3) region of cervical vertebra in healthy male volunteers.A three-dimensional hexahedral FE model of upper cervical spine was established by software (Mimics, GEOMAGICS, Pro/E and Ansys). Then the weakening of the strength of grid was performed to simulate the FE model of the type Ⅰ Hangman fracture, type Ⅱ odontoid fracture and the C(2/3) disc injury (FE/Fracture), the four internal fixation models: anterior cervical plate+ odontoid screw+ cage (FE/ACP+ OS+ cage), affixing rods from pedicle screws in C(2) to lateral mass screws in C(3)+ odontoid screw + cage (FE/C(2)PS+ C(3)LMS+ OS+ cage), affixing rods from pedicle screws in C(1) to pedicle screws in C(2) and lateral mass screws in C(3) (FE/C(1)PS+ C(2)PS+ C(3)LMS), anterior odontoid screw plate fixation system (FE/AOSP) were simulated on the FE/Fracture model...
August 21, 2018: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/30110516/lightning-rods-earthquakes-and-regional-identities-towards-a-multi-scale-framework-of-assessing-fracking-risk-perception
#19
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
https://www.readbyqxmd.com/read/30104353/controlling-fracture-cascades-through-twisting-and-quenching
#20
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 28, 2018: Proceedings of the National Academy of Sciences of the United States of America
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