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https://www.readbyqxmd.com/read/29679136/the-pedicle-instrumentation-and-percutaneous-elevation-pi-pe-a-new-cementless-surgical-technique-in-type-a-post-traumatic-vertebral-fractures
#1
Andrea Piazzolla, Giuseppe Solarino, Davide Bizzoca, Claudia Parato, Gaetano Monteleone, Franca Dicuonzo, Biagio Moretti
PURPOSE: To investigate if bone substitutes are strictly necessary to restore the vertebral body height and improve the clinical outcome, in patients with thoracolumbar or lumbar AO type A post-traumatic vertebral fractures, managed with balloon kyphoplasty combined with posterior screw and rod system. METHODS: 105 patients with post-traumatic thoracolumbar spine fracture were recruited. At baseline, the patients underwent a CT and an MRI of the spine. Clinical evaluation was performed, using the Visual Analog Scale (VAS) and the Oswestry Disability Index (ODI), at baseline, 48 h after surgery, at 3-month follow-up (FU), 6-month FU, 48 h after the instrumentation removal and at 24-month FU...
April 20, 2018: European Spine Journal
https://www.readbyqxmd.com/read/29678714/transmuscle-ultrasonography-in-the-placement-of-thoracolumbar-pedicle-screws-a-cadaveric-study
#2
Cheng-Long Xie, Qi-Shan Huang, Long Wu, Lei Xu, Hai-Cheng Dou, Xiang-Yang Wang, Zhong-Ke Lin
BACKGROUND: Transpedicular screws fixation has a biomechanical advantage of improving fusion rates. In the posterior thoracolumbar immobilization, a large number of screws cause perforation to pedicle or vertebra body. Techniques as radiograph and CT were used to minimize this complication. However, ultrasound in detecting the pedicle breach during the placement of the screw in unknown. Our goal is to evaluate the sensitivity of ultrasound for detecting the breaches. METHODS: A B-type transducer was used for scanning 216 Titanium pins inserted into the cadaveric pedicle...
April 17, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29678707/long-term-clinical-and-radiological-postoperative-outcomes-after-c1-c2-pedicle-screw-techniques-for-pediatric-atlantoaxial-rotatory-dislocation
#3
Xinjie Wu, Yafeng Li, Mingsheng Tan, Ping Yi, Feng Yang, Xiangsheng Tang, Qingying Hao
BACKGROUND: Although C1-C2 pedicle screw techniques have been extensively reported in paediatric series, reports on their use have examined only small series with short follow-up periods. Here, we present a study on paediatric patients with atlantoaxial rotatory dislocation (AARD) treated with these techniques with a minimum 5-year follow-up period. METHODS: A total of 27 paediatric patients with AARD who underwent C1-C2 pedicle screw fixation between 2004 and 2012 were retrospectively evaluated...
April 17, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29678371/tethering-technique-using-bone-screws-and-wire-for-chronic-mandibular-dislocation-a-preliminary-study-of-refractory-cases
#4
N Segami, T Nishimura, K Miyaki, H Adachi
A retrospective study was performed to determine the efficacy of a tethering procedure developed to achieve a more rigid fixation and more reliable outcome in patients with refractory dislocation of the temporomandibular joint. The cases of eight patients with dementia and systemic diseases who underwent this technique were reviewed. In these eight patients, the condyles of 13 joints were ligated using wire between screws placed in the eminence and condylar head. Additional screw-wire ligations were applied to reinforce the restraint of movement in five of the 13 joints with suspected uncontrolled dislocation...
April 17, 2018: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29678367/a-biomechanical-evaluation-of-different-fixation-strategies-for-posterolateral-fragments-in-tibial-plateau-fractures-and-introduction-of-the-magic-screw
#5
Hui Sun, Qi-Fang He, Bin-Bin Zhang, Yi Zhu, Wei Zhang, Yi-Min Chai
BACKGROUND: Posterior plate fixation is biomechanically the strongest fixation method for posterolateral column fracture (PLCF) of the tibial plateau; however, there are inherent deficiencies and risks of a posterior approach. Thus, the 'magic screw' was proposed to enhance fixation stability of the lateral rafting plate used for PLCF. The purpose of this study was to re-examine and compare the stability of different fixation methods for PLCF. METHODS: Synthetic tibiae models were used to simulate posterolateral split fractures...
April 17, 2018: Knee
https://www.readbyqxmd.com/read/29677091/factors-associated-with-revision-surgery-after-internal-fixation-of-hip-fractures
#6
Sheila Sprague, Emil H Schemitsch, Marc Swiontkowski, Gregory J Della Rocca, Kyle J Jeray, Susan Liew, Gerard P Slobogean, Sofia Bzovsky, Diane Heels-Ansdell, Qi Zhou, Mohit Bhandari
BACKGROUND: Femoral neck fractures are associated with high rates of revision surgery after management with internal fixation. Using data from the Fixation using Alternative Implants for the Treatment of Hip fractures (FAITH) trial evaluating methods of internal fixation in patients with femoral neck fractures, we investigated associations between baseline and surgical factors and the need for revision surgery to promote healing, relieve pain, treat infection or improve function over 24 months postsurgery...
May 2018: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/29676258/-multiple-uses-of-skeletal-anchorages-taking-advantage-of-mini-screws-to-improve-aesthetics-with-active-and-passive-appliances
#7
Stéphane Renger, Mélanie Gremeret, Sarah Gebeile-Chauty
INTRODUCTION: The main causes of failures in canine traction are anchorage defects, incorrect direction of force, uncontrolled forces. An adolescent female (10 years, 9 months) presents with two included canines on the maxillary arch, in a palatal position and her lateral incisors (12 and 22) are microdontic. Two mini-screws are inserted on the palate, in a mesial position to 16 and 26 to secure the traction of 13 and 23; in general, braces are bonded after this first step. After debonding, mini-screws remain to help stabilize the palatal plate during the retention period and to avoid unaesthetic metallic wires and hooks which sometimes cause occlusal interferences...
March 2018: L' Orthodontie Française
https://www.readbyqxmd.com/read/29676252/-completely-customized-lingual-orthodontics-to-correct-class-ii-malocclusion-in-adolescents
#8
Ons Alouini, Dirk Wiechmann
INTRODUCTION: Completely-customized lingual orthodontics is an efficient, predictable and esthetic solution for our patients. Adolescents showing a class II malocclusion represent the majority of patients in orthodontic practices. Several modes of treatment are available to correct this sagittal discrepancy such as inter-maxillary elastics, flexible or rigid protrusion devices, maxillary distalization using mini-screws or symmetric and asymmetric extractions. The choice depends on several decision criteria such as the severity of the malocclusion, the symmetry of the class II discrepancy as well as the age and the motivation of the patient...
March 2018: L' Orthodontie Française
https://www.readbyqxmd.com/read/29675675/adolescent-idiopathic-scoliosis-correction-by-instrumented-vertebral-arthrodesis-with-autologous-bone-graft-from-local-harvesting-without-bone-substitute-use-results-with-mean-3-year-follow-up
#9
Marco Crostelli, Osvaldo Mazza, Massimo Mariani, Dario Mascello, Carlo Iorio
PURPOSE: Bone substitutes' advantage is enhancing arthrodesis biologic support without further autologous bone graft harvested from other skeleton sites, as from posterior iliac crests; however, in our experience, bone substitutes' integration is often incomplete. METHODS: From 2012 to 2017, we operated 108 patients by posterior instrumented vertebral arthrodesis in adolescent idiopathic scoliosis (AIS) correction, mean main curve 80° Cobb, and mean age 12 years and 6 months, with all pedicle screws instrumentation in main curve/curves area and hooks at upper tip of implant; bone graft has been harvested only at vertebral level, without bone substitutes or autologous graft from other patient sites or allogenic bone graft...
April 19, 2018: European Spine Journal
https://www.readbyqxmd.com/read/29675632/factors-affecting-mortality-and-reoperations-in-high-energy-pelvic-fractures
#10
Peyman Bakhshayesh, Lars Weidenhielm, Anders Enocson
AIM: Factors affecting mortality during the first year following high-energy pelvic fractures has not been reported previously. Nor has surgical complications leading to reoperations been reported in a cohort with only high-energy pelvic trauma patients. OBJECTIVES: The aim of this study was to report and analyse factors affecting outcome, in terms of mortality and reoperations, up to 1 year after the injury in patients with a traumatic pelvic ring injury due to a high-energy trauma...
April 19, 2018: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/29675505/locking-dorsal-plate-in-four-bone-arthrodesis-in-slac-and-snac-3-wrist
#11
Simona Odella, Amos M Querenghi, Francesco M Locatelli, Ugo Dacatra, Elia Creta, Pierluigi Tos
Purpose  The aim of this study was to evaluate the effectiveness and the safety of performing a four-bone arthrodesis (FBA) with dorsal locking plate in patients suffering from stage III scapholunate advanced collapse/scaphoid nonunion advance collapse (SLAC/SNAC) wrist. Methods  We evaluated retrospectively 20 patients surgically treated by a FBA with the use of locking dorsal plate. All the patients were clinically evaluated at follow-up for grip strength, range of motion, and pain (visual analog scale), and with the Disability of the Arm, Shoulder and Hand score and the Mayo wrist score...
March 2018: Joints
https://www.readbyqxmd.com/read/29675058/foreign-body-removal-by-flexible-bronchoscopy-using-retrieval-basket-in-children
#12
Kyunghoon Kim, Hye Jin Lee, Eun Ae Yang, Hwan Soo Kim, Yoon Hong Chun, Jong-Seo Yoon, Hyun Hee Kim, Jin Tack Kim
OBJECTIVES: Aspiration of foreign bodies into the tracheobronchial tree is a common accident in children. This study aimed to evaluate the safety and outcome of foreign body removal by flexible bronchoscopy using a retrieval basket in children. METHODS: This was a retrospective study of children treated for foreign bodies in the airway via flexible bronchoscopy using a retrieval basket at a tertiary hospital in Korea between February 2014 and October 2017. The medical records of the patients were retrospectively reviewed and analyzed...
April 2018: Annals of Thoracic Medicine
https://www.readbyqxmd.com/read/29673869/process-monitoring-and-evaluation-of-a-continuous-pharmaceutical-twin-screw-granulation-and-drying-process-using-multivariate-data-analysis
#13
A F Silva, J Vercruysse, C Vervaet, J P Remon, J A Lopes, T De Beer, M C Sarraguça
The present study aims at acquiring an in-depth process knowledge about a twin-screw granulation and fluid bed drying process performed on the commercially available continuous line. Batch Statistical Process Monitoring (BSPM) principles are used to describe and monitor the variables with a relevant time-related trajectory. The continuous granulator operates in a truly continuous manner and variables logged by this unit do not present time-relevant features. On the other hand, the fluid bed dryer is divided in six identical cells, which are sequentially filled and discharged, ensuring a continuous flow of material...
April 16, 2018: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/29673708/fractographic-analyses-of-failed-one-piece-zirconia-implant-restorations
#14
Marit Øilo, Dwayne Arola
BACKGROUND: Promising results of initial clinical trials with yttria-stabilized zirconia have led to more extensive use of zirconia in dental implant superstructures. The applications have extended to abutments and complex individually designed crown-abutment one-piece structures. Little is known about their clinical success and the primary cause of failures. PURPOSE: The aim of this study was to identify the cause of fracture of retrieved implant-retained one-piece prostheses that failed during clinical use...
April 16, 2018: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29673344/the-risk-of-violating-the-posterior-malleolar-fracture-when-nailing-the-ipsilateral-concomitant-spiral-distal-tibial-fracture
#15
Yu Zhang, Xiaodong Qin, Lijun Song, Xiang Li
BACKGROUND: For a distal tibial spiral fracture combined with a non-displaced posterior malleolar fragment (PMF), we proposed a hypothesis that the treating surgeon could assess the size of the PMF to determine the need for stabilizing that structure first before rodding the tibia. MATERIALS AND METHODS: Fifty 3-D models (22 females) of combined distal tibial and posterior malleolar fractures from one trauma center were reconstructed. In each case, a virtual tibial intramedullary nail (vIM nail) with three distal anteroposterior (AP) locking screws (S13 , S15 and S37 , the number indicating the distance from the screw to the nail tip) were inserted into the center of the tibial canal and ended on top of the distal tibial physeal scar...
April 19, 2018: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29673199/thoracic-lumbar-and-sacral-pedicle-screw-placement-using-stryker-ziehm-virtual-screw-technology-and-navigated-stryker-cordless-driver-3-technical-note
#16
Praveen Satarasinghe, Kojo D Hamilton, Michael J Tarver, Robert J Buchanan, Michael T Koltz
OBJECT: Utilization of pedicle screws (PS) for spine stabilization is common in spinal surgery. With reliance on visual inspection of anatomical landmarks prior to screw placement, the free-hand technique requires a high level of surgeon skill and precision. Three-dimensional (3D), computer-assisted virtual neuronavigation improves the precision of PS placement and minimization steps. METHODS: Twenty-three patients with degenerative, traumatic, or neoplastic pathologies received treatment via a novel three-step PS technique that utilizes a navigated power driver in combination with virtual screw technology...
April 17, 2018: Journal of Clinical Medicine
https://www.readbyqxmd.com/read/29672421/human-versus-robot-a-propensity-matched-analysis-of-the-accuracy-of-free-hand-versus-robotic-guidance-for-placement-of-s2-alar-iliac-s2ai-screws
#17
Jamal N Shillingford, Joseph L Laratta, Paul J Park, Joseph M Lombardi, Alexander Tuchman, Comron S Saifi, Ronald A Lehman, Lawrence G Lenke
STUDY DESIGN: Retrospective matched cohort analysis. OBJECTIVE: To compare the accuracy of S2 alar-iliac (S2AI) screw placement by robotic guidance versus free hand technique. SUMMARY OF BACKGROUND DATA: Spinopelvic fixation utilizing S2AI screws provides optimal fixation across the lumbosacral junction allowing for solid fusion, especially in long segment fusion constructs. Traditionally, S2AI screw placement has required fluoroscopic guidance for accurate screw placement...
April 18, 2018: Spine
https://www.readbyqxmd.com/read/29672420/the-arrival-of-robotics-in-spine-surgery-a-review-of-the-literature
#18
Alexander Ghasem, Akhil Sharma, Dylan N Greif, Milad Alam, Motasem Al Maaieh
STUDY DESIGN: Systematic Review. OBJECTIVE: The authors aim to review comparative outcome measures between robotic and free-hand spine surgical procedures including: accuracy of spinal instrumentation, radiation exposure, operative time, hospital stay, and complication rates. SUMMARY OF BACKGROUND DATA: Misplacement of pedicle screws in conventional open as well as minimally invasive surgical procedures has prompted the need for innovation and allowed the emergence of robotics in spine surgery...
April 18, 2018: Spine
https://www.readbyqxmd.com/read/29671110/pulmonary-cement-embolism-following-cement-augmented-fenestrated-pedicle-screw-fixation-in-adult-spinal-deformity-patients-with-severe-osteoporosis-analysis-of-2978-fenestrated-screws
#19
Onur Levent Ulusoy, Sinan Kahraman, Isik Karalok, Emel Kaya, Meric Enercan, Cem Sever, Burak Abay, Selhan Karadereler, Azmi Hamzaoglu
INTRODUCTION: There is very limited information about pulmonary cement embolism (PCE) following cement-augmented fenestrated pedicle screw (CAFPS) fixation in the literature. The aim of this study to report the incidence of PCE following CAFPS fixation in adult deformity patients with severe osteoporosis and to identify risk factors such as; the number of levels, number of screws, and the cement volume used. METHODS: 281 patients (204F, 77M) in whom CAFPS fixation was used during deformity surgery were included...
April 18, 2018: European Spine Journal
https://www.readbyqxmd.com/read/29670905/cortical-bone-trajectory-screws-in-posterior-lumbar-interbody-fusion-minimally-invasive-surgery-for-maximal-muscle-sparing-a-prospective-comparative-study-with-the-traditional-open-technique
#20
Nicola Marengo, Marco Ajello, Michele Federico Pecoraro, Giulia Pilloni, Giovanni Vercelli, Fabio Cofano, Francesco Zenga, Alessandro Ducati, Diego Garbossa
Introduction: A prospective comparative study between classical posterior interbody fusion with peduncular screws and the new technique with divergent cortical screws was conducted. Material and Methods: Only patients with monosegmental degenerative disease were recruited into this study. We analyzed a cohort of 40 patients treated from January 2015 to March 2016 divided into 2 groups (20 patients went to traditional open surgery and 20 patients under mini-invasive strategy)...
2018: BioMed Research International
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