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https://read.qxmd.com/read/30772977/-surgical-results-and-sagittal-alignment-analysis-of-different-fusion-levels-for-degenerative-scoliosis
#1
X L Meng, Y Hai, G Xu, J C Yang, Q J Su
Objective: To retrospectively investigate the effects of long segment fusion and short segment fusion on lumbar sagittal alignment and quality of life in patients with degenerative scoliosis. Methods: From January 2011 to December 2014, 75 patients with degenerative scoliosis were treated with pedicle screw fixation. Total of 56 females and 19 males were included in this study. Fifty-four patients underwent short-segment fusion (≤3 segments) and 21 patients underwent long-segment fusion (>3 segments). The average age of the patients was (63±8) years...
January 29, 2019: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://read.qxmd.com/read/30772052/ideal-length-of-thread-forms-for-screws-used-in-screw-fixation-of-nondisplaced-femoral-neck-fractures
#2
Christina Liu, Arvind Von Keudell, Michael McTague, Edward K Rodriguez, Michael J Weaver
BACKGROUND: It is common practice when placing cannulated screws within the femoral head when treating femoral neck fractures to avoid the thread-forms from crossing the fracture line. Despite the widespread use of cannulated screws in internal fixation of femoral neck fractures, there is no study to our knowledge that describes the ideal length of thread-forms. PURPOSE: The purpose of this study is to determine the thread length that will maximize purchase within the femoral head while minimizing risk of crossing the fracture line...
January 31, 2019: Injury
https://read.qxmd.com/read/30771048/a-novel-fixation-technique-using-anterior-c1-screw-in-a-pediatric-solitary-cervical-spinal-juvenile-xanthogranuloma
#3
REVIEW
Rekhapalli Rajasekhar, Madhivanan Karthigeyan, Pravin Salunke, Kirti Gupta
PURPOSE: Juvenile xanthogranuloma (JXG) presenting as solitary vertebral body lesion is infrequently seen and usually limited to one or two levels. We report a case of an isolated JXG with extensive cervical spinal (bony and extradural) involvement in a 6-year-old child. There was a diagnostic dilemma as the radiologic and intraoperative picture resembled tuberculosis. The spinal reconstruction was also challenging due to involvement of multiple vertebral levels and necessitated an anterior C1 screw...
February 15, 2019: European Spine Journal
https://read.qxmd.com/read/30770996/anterior-inferior-tibiofibular-ligament-avulsion-fractures-in-operatively-treated-ankle-fractures-a-retrospective-analysis
#4
Merel F N Birnie, Kaz L J van Schilt, Fay R K Sanders, Peter Kloen, Tim Schepers
BACKGROUND: There is no consensus about the optimal treatment of anterior inferior ligament avulsion fractures of the ankle. The aim of this study is to provide insights regarding the incidence of anterior inferior ligament avulsion fractures, the association with fracture type, and correlation with treatment. METHODS: This study is a retrospective analysis in a level-1 trauma center of adult patients with an ankle fracture operated between the dates 01-01-2009 and 01-09-2017 who had a pre- and postoperative CT-scan...
February 15, 2019: Archives of Orthopaedic and Trauma Surgery
https://read.qxmd.com/read/30770701/unifying-classification-for-transdiaphragmatic-intercostal-hernia-and-other-costal-margin-injuries%C3%A2
#5
Michael R Gooseman, Majd Rawashdeh, Kavitha Mattam, Jagan N Rao, Paul R Vaughan, John G Edwards
OBJECTIVES: Taxonomy of injuries involving the costal margin is poorly described and surgical management varies. These injuries, though commonly caused by trauma, may also occur spontaneously, in association with coughing or sneezing, and can be severe. Our goal was to describe our experience using sequential segmental analysis of computed tomographic (CT) scans to perform accurate assessment of injuries around the costal margin. We propose a unifying classification for transdiaphragmatic intercostal hernia and other injuries involving the costal margin...
February 15, 2019: European Journal of Cardio-thoracic Surgery
https://read.qxmd.com/read/30770123/surgical-treatment-with-cannulated-screws-for-pediatric-femoral-neck-fractures-a-case-series
#6
Vito Pavone, Gianluca Testa, Maria Riccioli, Antonio Di Stefano, Giuseppe Condorelli, Giuseppe Sessa
INTRODUCTION: Femoral neck fractures are uncommon injuries in children, but the high incidence of long-term complications makes it important clinical entity. Early surgical treatment to achieve optimal results and to avoid a high rate of complications is widely advised. The purpose of this study was to retrospectively analyze the outcome of 8 children who sustained a femoral neck fracture. PATIENTS AND METHODS: The patients (6 boys and 2 girls with an average age of 9...
February 2, 2019: Injury
https://read.qxmd.com/read/30770121/displaced-intrarticular-fractures-of-the-calcaneus-orif-through-an-extended-lateral-approach
#7
Roberto Buzzi, Niccolò Sermi, Felicia Soviero, Stefano Bianco, Domenico A Campanacci
INTRODUCTION: Displaced intra-articular calcaneal fractures (DIACF) represent a challenging and controversial issue in traumatology. Conservative treatment has been recommended to avoid surgical problems and complications. The final result, however, is often a painful malunioun of the calcaneus with peroneal impingement. Surgical treatment is gaining acceptance since it offers a chance to restore bone anatomy improving function as long as complications are avoided. MATERIAL AND METHOD: We reviewed a series of 59 DIACF treated by a single surgeon during a 9 years period...
February 8, 2019: Injury
https://read.qxmd.com/read/30768663/influence-of-implant-prosthetic-connection-on-peri-implant-bone-loss-a-prospective-clinical-trial-with-2-year-follow-up
#8
Rubén Agustín-Panadero, Raquel León-Martínez, Carlos Labaig-Rueda, Joan Faus-López, M Fernanda Solá-Ruíz
PURPOSE: To analyze peri-implant bone loss around six different types of implant-prosthetic connections over a 2-year follow-up period. MATERIALS AND METHODS: A total of 120 implants were divided into six groups (n = 20), three with crestally and three with supracrestally placed implants, with different internal connections, placed in posterior sectors (molar and premolar), and bearing one-piece CAD/CAM restorations screwed directly to each implant's prosthetic platform...
February 15, 2019: International Journal of Oral & Maxillofacial Implants
https://read.qxmd.com/read/30768662/influence-of-transmucosal-area-morphology-on-peri-implant-bone-loss-in-tissue-level-implants
#9
Rubén Agustín-Panadero, Nuria Martínez-Martínez, Lucía Fernandez-Estevan, Joan Faus-López, M Fernanda Solá-Ruíz
PURPOSE: To analyze peri-implant bone loss around two types of tissue-level implants (convergent and divergent transmucosal morphology) placed in the same region of either the maxilla or mandible in a single surgical session. MATERIALS AND METHODS: This prospective study included 21 patients who each received two implants, one with a convergent transmucosal collar (n = 21) the other with a divergent collar (n = 21). Implants were placed in a single surgical session, by the same clinician, in the same clinical setting at the Prosthodontic and Occlusion Unit, University of Valencia (Spain)...
February 15, 2019: International Journal of Oral & Maxillofacial Implants
https://read.qxmd.com/read/30768661/clinical-performance-of-short-dental-implants-supporting-single-crown-restoration-in-the-molar-premolar-region-cement-versus-screw-retention
#10
Eduardo Anitua, Mohammad Hamdan Alkhraisat
PURPOSE: This study assessed the survival and marginal bone loss of single-unit short implants (≤ 8 mm in length) in the premolar-molar area. It also compared cemented with screw-retained restoration. MATERIALS AND METHODS: In this clinical retrospective study, short implants supporting a single crown in the premolar-molar region were selected. Demographic-, surgical-, implant-, and prosthesis-related data were obtained. The predictor variable was the type of prosthesis retention...
February 15, 2019: International Journal of Oral & Maxillofacial Implants
https://read.qxmd.com/read/30768578/the-unstable-slipped-capital-femoral-epiphysis-does-the-rate-of-osteonecrosis-really-depend-on-the-timing-of-surgery-and-surgical-technique
#11
Wei Xiang Ng, Chung Yuan Kau, Vivienne Chien Lin Ho, Jordan Wei Peng Ng, Beatrice Jia Ying Lee, Nicole Kim Luan Lee, Kevin Boon Leong Lim
To investigate whether the timing of surgery and surgical technique affect the rate of osteonecrosis in unstable slipped capital femoral epiphysis (SCFE). This is a retrospective review of all unstable slips that were treated at our institution over 8.5 years with a minimum follow-up period of 12 months. Patients with stable slips were excluded from this analysis. Demographic data, time to surgery, and surgical technique were analyzed. Twenty-three unstable slips were included for study after excluding 40 stable slips...
February 13, 2019: Journal of Pediatric Orthopedics. Part B
https://read.qxmd.com/read/30768533/tensioned-wire-assisted-intramedullary-nail-treatment-of-proximal-tibia-shaft-fractures-a-technical-trick
#12
Razvan Nicolescu, Stephen M Quinnan, Charles M Lawrie, James J Hutson
Proximal tibia shaft fractures are often challenging to manage because of their intrinsic tendency toward valgus and apex anterior deformity. In recent years, intramedullary nailing (IMN) has become more frequently used to treat these injuries, allowing for biologic advantages such as load-sharing, immediate weight-bearing, and avoidance of disruption of periosteal blood supply. Several adjunctive techniques, such as semiextended positioning, blocking screws, and external fixation, have been developed to assist with fracture reduction during IMN...
March 2019: Journal of Orthopaedic Trauma
https://read.qxmd.com/read/30768288/supersonic-screw-dislocations-gliding-at-the-shear-wave-speed
#13
Shenyou Peng, Yujie Wei, Zhaohui Jin, Wei Yang
The motion of dislocations bridges the atomistic-scale deformation events with the macroscopic strength and ductility of crystalline metals. In particular, screw dislocations, whose Burgers vector is parallel to the line, play crucial roles on plastic flow. Nevertheless, their speed limit and its stress dependence remain controversial. Using large-scale molecular dynamics simulations, we reveal that full screw dislocations and twinning partial screw-type dislocations can glide steadily at the speed of shear wave velocity...
February 1, 2019: Physical Review Letters
https://read.qxmd.com/read/30767783/minimally-invasive-spinopelvic-crab-shaped-fixation-for-unstable-pelvic-ring-fractures-technical-note-and-16-case-series
#14
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/30767417/immediately-restored-single-implants-in-the-aesthetic-zone-of-the-maxilla-using-a-novel-design-5-year-results-from-a-prospective-single-arm-clinical-trial
#15
Sunyoung Ma, Andrew Tawse-Smith, Simon D K Brown, Warwick Duncan
BACKGROUND: Single implant crowns have become the preferred rehabilitation treatment option for replacing a missing tooth. PURPOSE: This study evaluates 5-year clinical success of using tilted implants placed immediately after extraction followed by rehabilitation with all-ceramic crowns. MATERIALS AND METHODS: Twenty-seven participants requiring 28 single implant crowns in the aesthetic zone of maxilla were recruited to participate in a single-arm clinical trial...
February 14, 2019: Clinical Implant Dentistry and related Research
https://read.qxmd.com/read/30765309/biomechanical-properties-of-transosseous-bony-bankart-repair-in-a-cadaver-model
#16
Philippe Clavert, Florence Aim, Nicolas Bonnevialle, Marine Arboucalot, Matthieu Ehlinger, Thomas Bauer
INTRODUCTION: We compared two arthroscopic repair techniques to an intact shoulder using a biomechanical model of anterior shoulder dislocation with an anterior glenoid rim fracture (Ideberg IA fracture). We hypothesized that transosseous repair is sufficient to effectively stabilize the glenoid fracture. The primary objective was to define the mechanical properties of transosseous repair of an Ideberg IA fracture relative to an intact shoulder (control group). The secondary objective was to determine the contribution of supplemental anteroposterior screw fixation of the bone fragment...
February 11, 2019: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://read.qxmd.com/read/30765105/assessment-of-preload-remaining-torque-and-removal-torque-in-abutment-screws-under-different-frictional-conditions-a-finite-element-analysis
#17
Haddad Arabi Bulaqi, Ali Barzegar, Mojgan Paknejad, Hamed Safari
STATEMENT OF PROBLEM: Contamination with salivary fluids or blood during the treatment process changes the preload, remaining torque, and removal torque of retained screws, which ultimately affects the resistance to screw loosening. In previous studies, no consensus has been reached as to whether contamination can be used as a lubricant. PURPOSE: The purpose of this 3-dimensional (3D) finite element analysis study was to compare the preload, remaining torque, and removal torque under different frictional conditions in the processes of tightening, waiting period, and removal of abutment screws using a numeric method and finite element analysis...
February 11, 2019: Journal of Prosthetic Dentistry
https://read.qxmd.com/read/30764565/effective-establishment-of-glide-path-to-reduce-torsional-stress-during-nickel-titanium-rotary-instrumentation
#18
Ibrahim H Abu-Tahun, Sang Won Kwak, Jung-Hong Ha, Asgeir Sigurdsson, Mehmet Baybora Kayahan, Hyeon-Cheol Kim
This study compared the torque generation during canal shaping with a nickel-titanium endodontic instrument according to the extent of glide-path establishment. Seventy-five simulated S-shaped canal blocks were divided into five groups (n = 15) according to the number of repetitive insertions to the working length using a One G glide-path instrument: groups with 5, 10, 15, and 20 insertions as well as group Z without glide-path establishment. When the tip of the One G file reached the working length, the file was moved back and forth repetitively at the working length for the designated number of times for each group...
February 5, 2019: Materials
https://read.qxmd.com/read/30764474/reactive-compatibilization-of-pla-pa11-blends-and-their-application-in-additive-manufacturing
#19
Damien Rasselet, Anne-Sophie Caro-Bretelle, Aurélie Taguet, José-Marie Lopez-Cuesta
The aim of this work was to study the properties of polylatic acid/polyamide 11 (PLA/PA11) blends compatibilized with a multifunctionalized epoxide, Joncryl® , and to evaluate the performance of such blends processed by Fused Deposition Modeling (FDM) 3D printing, compared to those produced by injection molding method. Blends containing different Joncryl contents from 0.5 to 3 wt% were prepared by twin-screw extrusion. Evaluation of thermal, rheological and mechanical properties of such blends proved that Joncryl acted as a compatibilizer...
February 5, 2019: Materials
https://read.qxmd.com/read/30763527/titanium-lag-screw-versus-miniplate-fixation-in-the-treatment-of-anterior-mandibular-fractures
#20
Manish Tiwari, Vikas Meshram, Pravin Lambade, Gabriela Fernandes
PURPOSE: The use of plates for open reduction and internal fixation of mandibular fractures has become a widely accepted method in the past 3 decades. However, the anterior mandible is well suited to lag screw fixation owing to the thickness of its bony cortices. Hence, the purpose of the present study was to comparatively evaluate clinical outcomes of fixation using lag screws and miniplates in anterior mandibular fractures. PATIENTS AND METHODS: Fifty patients reporting to the department of oral and maxillofacial surgery with noncomminuted anterior mandibular fractures were randomly divided into 2 groups of 25 patients each...
January 15, 2019: Journal of Oral and Maxillofacial Surgery
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