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Rod Fracture

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https://read.qxmd.com/read/30767783/minimally-invasive-spinopelvic-crab-shaped-fixation-for-unstable-pelvic-ring-fractures-technical-note-and-16-case-series
#1
Akinori Okuda, Naoki Maegawa, Hiroaki Matsumori, Tomohiko Kura, Yasushi Mizutani, Hideki Shigematsu, Eiichiro Iwata, Masato Tanaka, Keisuke Masuda, Yusuke Yamamoto, Yusuke Tada, Yohei Kogeichi, Keisuke Takano, Hideki Asai, Yasuyuki Kawai, Yasuyuki Urisono, Kenji Kawamura, Hidetada Fukushima, Yasuhito Tanaka
BACKGROUND: Unstable sacral fractures are high-energy injuries and comprise polytrauma. Internal fixation to enable withstanding vertical loads is required to get up early from the bed after an unstable sacral fracture. We developed a new minimally invasive surgical (MIS) procedure for unstable pelvic ring fractures and reported it in Japanese in 2010. We presented our minimally invasive surgical technique of crab-shaped fixation for the treatment of unstable pelvic ring fractures and report on its short-term outcomes...
February 15, 2019: Journal of Orthopaedic Surgery and Research
https://read.qxmd.com/read/30741338/long-term-follow-up-after-surgical-treatment-of-adolescent-idiopathic-scoliosis-using-high-density-pedicle-screw-constructs-is-5-year-routine-visit-required
#2
Jean-Marc Mac-Thiong, Rodrigo Remondino, J Joncas, Stefan Parent, Hubert Labelle
PURPOSE: The objective of this study is to determine whether routine follow-up 5 years after adolescent idiopathic scoliosis (AIS) surgery is likely to affect postoperative care for patients treated with high-density pedicle screw constructs, when routine 2-year follow-up has been performed. METHODS: We reviewed 80 patients undergoing surgery for AIS using high-density pedicle screw constructs and followed routinely 2 and 5 years after surgery. Quality of life (QOL) was assessed using the SRS-30 outcome questionnaire...
February 11, 2019: European Spine Journal
https://read.qxmd.com/read/30724828/hybrid-growing-rod-technique-of-osteotomy-with-short-fusion-and-spinal-distraction-an-alternative-solution-for-long-spanned-congenital-scoliosis
#3
Xu Sun, Liang Xu, Zhonghui Chen, Benlong Shi, Xi Chen, Song Li, Changzhi Du, Qingshuang Zhou, Yong Qiu, Zezhang Zhu
STUDY DESIGN: Retrospective study. OBJECTIVE: The current study aimed to evaluate the effectiveness of the hybrid growing rod (GR) technique for the treatment of young children with congenital scoliosis (CS). SUMMARY OF BACKGROUND DATA: Congenital vertebral anomalies within long-spanned kyphoscoliosis was difficult to be managed by either definitive spinal fusion or standard GR technique. Hybrid technique of one-stage posterior osteotomy with short fusion and GR distraction was proposed in previous studies...
January 29, 2019: Spine
https://read.qxmd.com/read/30719490/debonding-mechanism-of-zirconia-and-lithium-disilicate-resin-cemented-to-dentin
#4
Mina Aker Sagen, Ketil Kvam, Eystein Ivar Ruyter, Hans Jacob Rønold
To evaluate debonding mechanism of zirconia and lithium disilicate cemented to dentin mimicking what could occur in a clinical setting. A null hypothesis of no difference in tensile bond strength between groups of zirconia and lithium disilicate cemented with resin cements was also tested. Zirconia rods ( n  = 100) were randomly assigned to two different surface treatment groups; air borne particle abrasion and hot etching by potassium hydrogen difluoride (KHF2 ). Lithium disilicate rods ( n  = 50) were surface etched by hydrofluoric acid (HF)...
2019: Acta Biomaterialia Odontologica Scandinavica
https://read.qxmd.com/read/30717036/low-rates-of-complications-after-spinopelvic-fixation-with-iliac-screws-in-260-adult-patients-with-a-minimum-2-year-follow-up
#5
James H Nguyen, Thomas J Buell, Tony R Wang, Jeffrey P Mullin, Marcus D Mazur, Juanita Garces, Davis G Taylor, Chun-Po Yen, Christopher I Shaffrey, Justin S Smith
OBJECTIVERecent literature describing complications associated with spinopelvic fixation with iliac screws in adult patients has been limited but has suggested high complication rates. The authors' objective was to report their experience with iliac screw fixation in a large series of patients with a 2-year minimum follow-up.METHODSOf 327 adult patients undergoing spinopelvic fixation with iliac screws at the authors' institution between 2010 and 2015, 260 met the study inclusion criteria (age ≥ 18 years, first-time iliac screw placement, and 2-year minimum follow-up)...
February 1, 2019: Journal of Neurosurgery. Spine
https://read.qxmd.com/read/30703208/accurate-and-efficient-plate-and-rod-micro-finite-element-whole-bone-models-based-on-high-resolution-peripheral-computed-tomography
#6
Ji Wang, Bin Zhou, Yizhong Hu, Zhendong Zhang, Y Eric Yu, Shashank Nawathe, Kyle K Nishiyama, Tony M Keaveny, Elizabeth Shane, X Edward Guo
The high-resolution peripheral quantitative computed tomography (HRpQCT) provides unprecedented visualization of bone microstructure and the basis for constructing patient-specific micro-finite element (µFE) models. Based on HRpQCT images, we have developed a plate rod µFE (PRµFE) method for whole bone segments using individual trabecula segmentation (ITS) and an adaptive cortical meshing technique. In contrast to the conventional voxel approach, the complex microarchitecture of the trabecular compartment is simplified into shell and beam elements based on the trabecular plate-and-rod configuration...
January 31, 2019: Journal of Biomechanical Engineering
https://read.qxmd.com/read/30701153/a-case-of-nonconsecutive-multiple-level-lumbar-spondylolysis-successfully-treated-with-single-level-repair-of-the-pars-interarticularis
#7
Satoru Yabuno, Masatoshi Yunoki, Takahiro Kanda, Atsushi Matsumoto, Koji Hirashita, Kimihiro Yoshino
Lumbar spondylolysis is commonly recognized at a single-level of the lumbar spine and frequently affects the L5 pars interarticularis unilaterally or bilaterally. Some reports have described multiple-level spondylolysis, most cases of which occur at consecutive lumbar segments. We herein present a rare case of lumbar spondylolysis involving nonconsecutive multiple-level segments; only eight such cases have been reported previously. A 38-year-old man presented with a 10-month history of chronic severe low back pain...
January 2019: NMC Case Report Journal
https://read.qxmd.com/read/30691258/multi-rod-constructs-can-increase-the-incidence-of-iliac-screw-loosening-after-surgery-for-adult-spinal-deformity
#8
Tomohiro Banno, Tomohiko Hasegawa, Yu Yamato, Daisuke Togawa, Go Yoshida, Sho Kobayashi, Tatsuya Yasuda, Hideyuki Arima, Shin Oe, Yuki Mihara, Hiroki Ushirozako, Yukihiro Matsuyama
Study Design: A retrospective study. Purpose: To investigate the incidence of iliac screw loosening with a two-rod vs. multi-rod construct and the effect on clinical and radiographic outcomes after surgery for adult spinal deformity (ASD). Overview of Literature: Multi-rod construct is useful for preventing rod fracture in ASD surgery. However, limited information is available regarding the incidence of iliac screw loosening after corrective fusion surgery using a multi-rod construct...
January 30, 2019: Asian Spine Journal
https://read.qxmd.com/read/30684758/supplemental-rods-are-needed-to-maximally-reduce-rod-strain-across-the-lumbosacral-junction-with-tlif-but-not-alif-in-long-constructs
#9
Jakub Godzik, Randall J Hlubek, Anna G U S Newcomb, Jennifer N Lehrman, Bernardo de Andrada Pereira, S Harrison Farber, Lawrence G Lenke, Brian P Kelly, Jay D Turner
BACKGROUND CONTEXT: Rod fracture at the lumbosacral (LS) junction remains challenging in long segment fusions and likely stems from increased lumbosacral strain. Reduction of LS instrumentation strain may help reduce fracture rates. PURPOSE: The goal of this investigation was to assess the effect of supplemental posterior 4-rod (4R) construction on LS stability and rod strain compared to standard 2-rod (2R) construction in a long segment fusion model. STUDY DESIGN/SETTING: Cadaveric biomechanical study...
January 23, 2019: Spine Journal: Official Journal of the North American Spine Society
https://read.qxmd.com/read/30680364/the-costs-of-confronting-osteoporosis-cost-study-of-an-australian-fracture-liaison-service
#10
Gabor Major, Rod Ling, Andrew Searles, Fiona Niddrie, Ayano Kelly, Elizabeth Holliday, John Attia, Nikolai Bogduk
Fracture liaison services (FLS) are an accepted approach to lowering rates of osteoporotic refractures. However, resource allocations to FLS are open to challenge, as most relevant cost analyses are based on anticipated, rather than observed, benefits. To support informed decision making, we have estimated the cost of operating an FLS, from the perspective of the Australian health system, with real life costs. On the basis of hospital records, we compared total costs of two cohorts of patients presenting with minimal trauma fractures (MTFs) at two hospital emergency departments (EDs) across a 6-month period (July to December 2010)...
January 2019: JBMR Plus
https://read.qxmd.com/read/30673742/relative-permeability-for-water-and-gas-through-fractures-in-cement
#11
Kenton A Rod, Wooyong Um, Sean M Colby, Mark L Rockhold, Christopher E Strickland, Sangsoo Han, Andrew P Kuprat
Relative permeability is an important attribute influencing subsurface multiphase flow. Characterization of relative permeability is necessary to support activities such as carbon sequestration, geothermal energy production, and oil and gas exploration. Previous research efforts have largely neglected the relative permeability of wellbore cement used to seal well bores where risks of leak are significant. Therefore this study was performed to evaluate fracturing on permeability and relative permeability of wellbore cement...
2019: PloS One
https://read.qxmd.com/read/30668915/microscale-structures-arising-from-nanoscale-inhomogeneities-in-nematics-made-of-bent-shaped-molecules
#12
Kanakapura Seshappa Krishnamurthy, Madhu Babu Kanakala, Channabasaveshwar V Yelamaggad, Nelamangala Vedavyasachar Madhusudana
Nano-scale structures in fluid media normally require techniques like freeze fracture electron microscopy and atomic force microscopy for their visualization. As demonstrated in the present study, the surface modification of nanoscale clusters occurring intrinsically in nematics made of bent shaped molecules with either rigid or flexible cores leads to micro-scale structures, which are visible in an optical microscope. The underlying physical mechanism proposed here involves a quasiperiodic change in anchoring conditions on untreated glass plates for the medium made of islands of clusters surrounded by unclustered molecules...
January 22, 2019: Journal of Physical Chemistry. B
https://read.qxmd.com/read/30660223/anatomic-trajectory-for-iliac-screw-placement-in-pediatric-scoliosis-and-spondylolisthesis-an-alternative-to-s2-alar-iliac-portal
#13
Subaraman Ramchandran, Stephen George, Jahangir Asghar, Harry Shufflebarger
STUDY DESIGN: Single-center retrospective study. OBJECTIVE: To analyze two-year postoperative outcomes following spinopelvic fixation in pediatric patients using the anatomic trajectory (AT) portal for iliac screws. SUMMARY: Iliac fixation is crucial in situations requiring fusion to sacrum. Challenges include complex anatomy, pelvic deformation, severe deformity, and previous surgery. The PSIS portal requires significant dissection, rod connectors, and complex bends...
March 2019: Spine Deformity
https://read.qxmd.com/read/30649811/a-simple-technique-for-removing-broken-pedicle-screws
#14
Mehmet Seçer, Ömer Polat, Kadir Çinar, Murat Ulutaş
Complications such as pseudoarthrosis and fracture of the rod and pedicle screw may develop after spinal fusion operations. Removing a broken pedicle screw is not always easy. Different methods and tools have been developed to remove the broken screw. Preserving the pedicle is an advantage for re-instrumentation. The head of the broken screw can be modified with the aid of a high-speed drill and the screw can be removed using a fractured screw removal tool without any problems. In addition, performing this procedure under the microscope reduces the risk of injury in the surrounding dura mater and the root...
September 11, 2018: Turkish Neurosurgery
https://read.qxmd.com/read/30649613/material-failure-in-dynamic-spine-implants-are-the-standardized-implant-tests-before-market-launch-sufficient
#15
Stavros Oikonomidis, Rolf Sobottke, Hans-Joachim Wilke, Christian Herren, Agnes Beckmann, Kourosh Zarghooni, Jan Siewe
PURPOSE: International Standards Organization (ISO) 12189 and American Society for Testing and Materials F2624 are two standard material specification and test methods for spinal implant devices. The aim of this study was to assess whether the existing and required tests before market launch are sufficient. METHODS: In three prospective studies, patients were treated due to degenerative disease of the lumbar spine or spondylolisthesis with lumbar interbody fusion and dynamic stabilization of the cranial adjacent level...
January 16, 2019: European Spine Journal
https://read.qxmd.com/read/30647954/a-rare-case-of-upper-calf-swelling-and-necrosis-the-morel-lavall%C3%A3-e-lesion
#16
O Nica, A Grecu, E A Dincă, D Marinescu, M E Ciurea
A 31-year-old patient presented in the Emergency Department with a tibial fracture following a car accident that crushed the lower third of his thigh and the proximal and median part of his calf. Tibial fracture fixation with an intramedullary rod, was complicated by a Morel-Lavallée lesion. Sequential debridement procedures were performed with partially successful granulation tissue proliferation under NPWT (Negative-Pressure Wound Therapy). To further promote the already delaying granulation, plastic surgeons opted for PRP/PRF (Platelet Rich Plasma/Platelet Rich Fibrin) which allowed appropriate skin grafting...
July 2018: Current Health Sciences Journal
https://read.qxmd.com/read/30644260/-surgical-treatment-strategy-for-the-shell-phenomenon-after-thoracolumbar-fracture
#17
Haigang Hu, Xu Lin, Lun Tan, Chao Wu, Zeli Zhong, Jun Zeng, Jiayan Deng
Objective: To explore the surgical treatment strategy of the vertebral "shell" after thoracolumbar fracture, and provide clinical reference for the intervention and treatment of "shell". Methods: Between June 2015 and January 2017, 53 patients with high risk of vertebral "shell" after thoracolumbar fracture surgery were enrolled in a prospective study according to the selection criteria. All patients were randomly divided into two groups according to the order of treatment, 27 cases in the treatment group were treated with short-segment fixation combined with vertebral reconstruction, 26 cases in the control group were treated with short-segment fixation...
January 1, 2019: Chinese Journal of Reparative and Reconstructive Surgery
https://read.qxmd.com/read/30644258/-a-strategy-of-combining-posterior-occipitocervical-angle-with-occipital-c-2-angle-for-adjustment-of-occipitocervical-fixation-angle-in-posterior-instrumented-occipitocervical-fusion
#18
Guangzhou Li, Hao Liu, Chen Ding, Yi Yang, Yang Meng, Yuchen Duan, Hua Chen, Ying Hong
Objective: To assess the application and the effectiveness of a strategy of combining posterior occipitocervical angle (POCA) with occipital-C 2 (O-C 2 ) angle for adjustment of occipitocervical fixation angle in posterior instrumented occipitocervical fusion. Methods: The clinical data of 22 patients undergoing posterior instrumented occipitocervical fusions between March 2013 and January 2016 were retrospectively analysed, and all patients were performed by using a strategy combining with POCA and O-C 2 angle for adjustment of occipitocervical fixation angle...
January 1, 2019: Chinese Journal of Reparative and Reconstructive Surgery
https://read.qxmd.com/read/30612886/rod-fracture-after-long-construct-fusion-in-adult-spinal-deformity-surgery-a-retrospective-case-control-study
#19
Jian Zhao, Bo Li, Ziqiang Chen, Changwei Yang, Ming Li
BACKGROUND: Very few studies have focused on the complication of rod fracture after posterior long construct fusion in adults with spinal deformity. Therefore, this retrospective study aimed to investigate the incidence and risk factors of this complication. METHODS: The study reviewed 213 adult patients with spinal deformity treated by long construct fusion between January 2009 and January 2017. Ten patients (4.6%) with rod fracture were included in the case study group...
January 3, 2019: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://read.qxmd.com/read/30603213/monitoring-osseointegrated-prosthesis-loosening-and-fracture-using-electrical-capacitance-tomography
#20
Sumit Gupta, Kenneth J Loh
A noncontact, noninvasive, electrical permittivity imaging technique is proposed for monitoring loosening of osseointegrated prostheses and bone fracture. The proposed method utilizes electrical capacitance tomography (ECT), which employs a set of noncontact electrodes, arranged in a circular fashion around the imaging area, for electrical excitations and measurements. An inverse reconstruction algorithm was developed and implemented to reconstruct the electrical permittivity distribution of the interrogated region from boundary capacitance measurements...
August 2018: Biomedical Engineering Letters
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