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https://www.readbyqxmd.com/read/29679256/biomechanical-features-of-six-design-of-the-delta-external-fixator-for-treating-pilon-fracture-a-finite-element-study
#1
Muhammad Hanif Ramlee, Mohd Ayub Sulong, Evelyn Garcia-Nieto, Daniel Angure Penaranda, Antonio Ros Felip, Mohammed Rafiq Abdul Kadir
Pilon fractures can be caused by high-energy vertical forces which may result in long-term patient immobilization. Many experts in orthopedic surgery recommend the use of a Delta external fixator for type III Pilon fracture treatment. This device can promote immediate healing of fractured bone, minimizing the rate of complications as well as allowing early mobilization. The characteristics of different types of the Delta frame have not been demonstrated yet. By using the finite element method, this study was conducted to determine the biomechanical characteristics of six different configurations (Model 1 until Model 6)...
April 21, 2018: Medical & Biological Engineering & Computing
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
#2
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/29677093/a-prospective-randomized-trial-to-assess-fixation-strategies-for-severe-open-tibia-fractures-modern-ring-external-fixators-versus-internal-fixation-fixit-study-erratum
#3
(no author information available yet)
No abstract text is available yet for this article.
May 2018: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/29673344/the-risk-of-violating-the-posterior-malleolar-fracture-when-nailing-the-ipsilateral-concomitant-spiral-distal-tibial-fracture
#4
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/29673097/effects-of-implant-delivered-insulin-on-bone-formation-in-osteoporotic-rats
#5
B Ö Malekzadeh, M C Erlandsson, P Tengvall, A Palmquist, M Ransjo, M I Bokarewa, A Westerlund
Osteoporosis is a major cause of age-related fractures. Healing complications in osteoporotic patients are often associated with increased mortality and morbidity. Stimulation of the implant-adjacent bone could be beneficial in terms of the surgical outcome. Over the past decade, numerous investigations have implicated insulin in normal bone growth, and recent studies have described the advantages of administering insulin locally to increase bone formation. Therefore, we hypothesized that insulin-coated titanium implants would increase bone formation in osteoporotic animals...
April 19, 2018: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/29672339/the-effects-of-episodic-alcohol-exposure-on-bmp2-signaling-during-tibia-fracture-healing
#6
Anthony Bratton, Joshua Eisenberg, Aleksandra Vuchkovska, Philip Roper, John J Callaci
OBJECTIVES: To explore how alcohol affects the BMP-2 signaling pathway, which is known to play a critical role in bone and cartilage formation during fracture healing. METHODS: A rat model was used to demonstrate the detrimental effects of alcohol exposure on tibia fracture healing. Specific components of the BMP-2 pathway were analyzed in fracture callus at days 3, 7, 14, 21 post fracture via western immunoassays and ELISA. RESULTS: Alcohol exposure prior to tibia fracture demonstrated attenuation of downstream BMP-2 signaling...
April 18, 2018: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/29667926/proximal-tibia-stress-fracture-with-osteoarthritis-of-knee-radiological-and-functional-analysis-of-one-stage-tka-with-long-stem
#7
Dhanasekaran Soundarrajan, Natesan Rajkumar, Palanisamy Dhanasekararaja, Shanmuganathan Rajasekaran
INTRODUCTION: Proximal tibia stress fractures with knee osteoarthritis pose a challenging situation. We evaluated the radiological and functional outcome of one-stage total knee arthroplasty (TKA) and long stem for patients with varied grades of knee arthritis and proximal tibia stress fractures.  Methods: We analysed 20 patients from April 2012 to March 2017 with proximal tibia stress fractures associated with knee osteoarthritis of varied grades. Out of 20 patients, five were acute fresh fractures...
2018: SICOT-J
https://www.readbyqxmd.com/read/29666001/distal-tibial-triplane-fracture-with-ipsilateral-tibial-shaft-fracture-a-case-series
#8
Timothy S Holland, Christopher P Prior, Roger Dm Walton
BACKGROUND & PURPOSE: Distal tibial Triplane fracture with ipsilateral tibial shaft fracture is a rare but important problem. This rarely reported combination of injuries if not recognised may lead to deleterious consequences. METHODS/PATIENTS: The local database of all emergency admissions was scrutinised to identify subjects before interrogation of the clinical notes and relevant radiographic imaging. FINDINGS: This paper reports a series of five children who were found to have triplane fracture of the distal tibia with concomitant ipsilateral fracture of the tibial shaft...
April 14, 2018: Surgeon: Journal of the Royal Colleges of Surgeons of Edinburgh and Ireland
https://www.readbyqxmd.com/read/29662767/reconstruction-of-the-lateral-tibia-plateau-fracture-with-a-third-triangular-support-screw-a-biomechanical-study
#9
Eduardo Moran, Ivan Zderic, Kajetan Klos, Paul Simons, Miguel Triana, R Geoff Richards, Boyko Gueorguiev, Mark Lenz
Background: Split fractures of the lateral tibia plateau in young patients with good bone quality are commonly treated using two minimally invasive percutaneous lag screws, followed by unloading of the knee joint. Improved stability could be achieved with the use of a third screw inserted either in the jail-technique fashion or with a triangular support screw configuration. The aim of this study was to investigate under cyclic loading the compliance and endurance of the triangular support fixation in comparison with the standard two lag-screw fixation and the jail technique...
October 2017: Journal of Orthopaedic Translation
https://www.readbyqxmd.com/read/29661687/impact-of-weight-loss-with-intragastric-balloon-on-bone-density-and-microstructure-in-obese-adults
#10
Eduardo Madeira, Miguel Madeira, Erika Paniago Guedes, Thiago Thomaz Mafort, Rodrigo Oliveira Moreira, Laura Maria Carvalho de Mendonça, Inayá Correa Barbosa Lima, Leonardo Vieira Neto, Paulo Roberto Alves de Pinho, Agnaldo José Lopes, Maria Lucia Fleiuss Farias
The historical concept that obesity protects against bone fractures has been questioned. Weight loss appears to reduce bone mineral density (BMD); however, the results in young adults are inconsistent, and data on the effects of weight loss on bone microstructure are limited. This study aimed to evaluate the impact of weight loss using an intragastric balloon (IGB) on bone density and microstructure. Forty obese patients with metabolic syndrome (mean age 35.1 ± 7.3 yr) used an IGB continuously for 6 mo...
March 21, 2018: Journal of Clinical Densitometry
https://www.readbyqxmd.com/read/29660738/evaluating-stiffness-of-fibreglass-and-thermoplastic-splint-materials-and-inter-fragmentary-motion-in-a-canine-tibial-fracture-model
#11
Amanda L Wagoner, Matthew J Allen, Claudia Zindl, Alan Litsky, Robert Orsher, Ron Ben-Amotz
OBJECTIVES:  Various materials are used to construct splints for mid-diaphyseal tibial fracture stabilization. The objective of this study was to compare construct stiffness and inter-fragmentary bone motion when fibreglass (FG) or thermoplastic (TP) splints are applied to either the lateral or cranial aspect of the tibia in a mid-diaphyseal fracture model. METHODS:  A coaptation bandage was applied to eight cadaveric canine pelvic limbs, with a custom-formed splint made of either FG or TP material applied to either the lateral or cranial aspect of the osteotomized tibia...
April 16, 2018: Veterinary and Comparative Orthopaedics and Traumatology: V.C.O.T
https://www.readbyqxmd.com/read/29659886/bone-parameters-in-anorexia-nervosa-and-athletic-amenorrhea-comparison-of-two-hypothalamic-amenorrhea-states
#12
Nurgun Kandemir, Meghan Slattery, Kathryn E Ackerman, Shreya Tulsiani, Amita Bose, Vibha Singhal, Charumathi Baskaran, Seda Ebrahimi, Mark Goldstein, Kamryn Eddy, Anne Klibanski, Madhusmita Misra
Purpose: We have reported low bone mineral density (BMD), impaired bone structure, and increased fracture risk in anorexia nervosa (AN) and normal-weight, oligo-amenorrheic athletes (OA). However, data directly comparing compartment-specific bone parameters in AN, OA and controls are lacking. Methods: 426 females 14-21.9 years old were included; 231 AN, 94 OA and 101 normal-weight eumenorrheic controls. Dual energy x-ray absorptiometry was used to assess areal BMD (aBMD) of the whole body less head (WBLH), spine, and hip...
April 5, 2018: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29658979/mini-fragment-fixation-is-equivalent-to-bicortical-screw-fixation-for-horizontal-medial-malleolus-fractures
#13
Adam M Wegner, Philip R Wolinsky, Michael A Robbins, Tanya C Garcia, Derek F Amanatullah
Horizontal fractures of the medial malleolus occur through application of valgus or abduction force through the ankle that creates a tension failure of the medial malleolus. The authors hypothesize that mini-fragment T-plates may offer improved fixation, but the optimal fixation construct for these fractures remains unclear. Forty synthetic distal tibiae with identical osteotomies were randomized into 4 fixation constructs: (1) two parallel unicortical cancellous screws; (2) two parallel bicortical cortical screws; (3) a contoured mini-fragment T-plate with 2 unicortical screws in the fragment and 2 bicortical screws in the shaft; and (4) a contoured mini-fragment T-plate with 2 bicortical screws in the fragment and 2 unicortical screws in the shaft...
April 16, 2018: Orthopedics
https://www.readbyqxmd.com/read/29657482/functional-and-radiological-outcome-in-management-of-compound-tibia-diaphyseal-fracture-with-ao-monolateral-fixator-versus-limb-reconstruction-system
#14
Hitesh J Mangukiya, Neetin P Mahajan, Eknath D Pawar, Aakash Mane, Jitsen Manna
Introduction: Tibia being the most common fractured long bone represents 36.7% of all long bone fractures in adults with open fracture comprises 23.5% of all tibial shaft fracture. The lack of the muscular covering over anteromedial aspect of the tibia and poor blood supply predispose open tibial fractures to a 10-20 fold increased risk of developing infection than open fracture in any other anatomical areas and a nonunion rate as high as 28% has been reported in the literature. Methods: We did a prospective study at our institute from 2014-2016 comprising 40 patients with compound tibia diaphyseal fracture managed with AO monolateral external fixator (Group 1) (n = 20) and Limb reconstruction system (Group 2) (n = 20) as primary and definitive tool...
March 2018: Journal of Orthopaedics
https://www.readbyqxmd.com/read/29656599/novel-cost-effective-cu-doped-calcium-silicate-nanoparticles-for-bone-fracture-intervention-inherent-bioactivity-and-in-vivo-performance
#15
Mostafa Mabrouk, Shaimaa A ElShebiney, Sayed H Kenawy, Gehan T El-Bassyouni, Esmat Ma Hamzawy
Copper (Cu)-doped calcium silicate nanoparticles were synthesized by a wet precipitation method as economical bone fracture filler. The aim was to improve the overall physicochemical properties, bioactivity, and biological performance of the bone fracture filler prepared herein. The synthesized nanoparticles were evaluated using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and transmission electron microscopy (TEM). The bioactivity of the prepared nanoparticles was investigated after immersion in simulated body fluid (SBF) by means of inductively coupled plasma (ICP), SEM coupled with energy dispersive X-rays (EDX), and FTIR...
April 15, 2018: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/29651387/synchronous-soleus-and-reverse-sural-flap-for-large-soft-tissue-defect-reconstruction-of-leg
#16
Seyed Esmail Hassanpour, Masoud Yavari, Amir Reza Motabar
BACKGROUND: Extended Soft tissue defect of leg including middle and distal parts always has been a challenge for many plastic surgeons and also a frustrated problem for patients and families. To introduce the use of the soleus muscle and reverse sural flaps as synchronous surgical treatment alternative of the leg bone exposure with large soft tissue defect, this study was conducted. METHODS: The medical records of patients undergoing transposition of the soleus muscle for treating exposed bone in the leg and simultaneous sural flap were retrospectively analyzed from January 2009 to July 2014, while gathering information on the used muscle was to cover the lesion...
January 2018: World Journal of Plastic Surgery
https://www.readbyqxmd.com/read/29642930/neuropeptide-regulation-of-adaptive-immunity-in-the-tibia-fracture-model-of-complex-regional-pain-syndrome
#17
Wen-Wu Li, Tian-Zhi Guo, Xiaoyou Shi, Frank Birklein, Tanja Schlereth, Wade S Kingery, J David Clark
BACKGROUND: Both dysfunctional neuropeptide signaling and immune system activation are characteristic of complex regional pain syndrome (CRPS). Unknown is whether substance P (SP) or calcitonin gene-related peptide (CGRP) support autoantibody production and, consequently, nociceptive sensitization. METHODS: These experiments involved the use of a well-characterized tibia fracture model of CRPS. Mice deficient in SP expression (Tac1-/- ) and CGRP signaling (RAMP1-/- ) were used to probe the neuropeptide dependence of post-fracture sensitization and antibody production...
April 11, 2018: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/29628697/seasonal-variation-in-orthopedic-trauma-patients-an-experience-from-central-india
#18
Rajeev Shukla, Nikhil Jain, Utkarsh Agarwal, Tanveer Sheikh, Ravikant Jain
Objectives: This study aims to determine the various epidemiological factors responsible for orthopedic trauma cases: how do weather patterns, month, season and public working schedule influence the daily frequency of orthopedic trauma. Material and methods: This was a descriptive study performed in the Department of Orthopedics at a tertiary care centre in central India Participants: 7980 trauma cases reported in our study period. Study variables: Demographic characteristics of the cases, time, day, the month of injury and type of trauma and cause of trauma...
March 2018: Journal of Clinical Orthopaedics and Trauma
https://www.readbyqxmd.com/read/29627850/clinical-outcomes-with-the-corticotomy-first-technique-associated-with-the-ilizarov-method-for-the-management-of-the-septic-long-bones-non-union
#19
Gamal Ahmed Hosny, Abdel-Salam Abdel-Aleem Ahmed, Mohamed Abd-Elaal Hussein
PURPOSE: Corticotomy is an integral part of the Ilizarov method on management of infected nonunited fractures that are challenging orthopaedic surgeons. However, the presence of active draining sinuses may contaminate the operative field with the potential of developing corticotomy site infection. The authors present a surgical technique aiming at minimizing or avoiding the risk of surgical site infection (SSI) in the corticotomy zone. PATIENTS AND METHODS: A total of 144 cases of draining infected nonunions were treated by Ilizarov fixator using the corticotomy-first technique...
April 7, 2018: International Orthopaedics
https://www.readbyqxmd.com/read/29625505/proximal-versus-distal-recipient-vessels-in-lower-extremity-reconstruction-a-retrospective-series-and-systematic-review
#20
John T Stranix, Zachary M Borab, William J Rifkin, Adam Jacoby, Z-Hye Lee, Lavinia Anzai, Daniel J Ceradini, Vishal Thanik, Pierre B Saadeh, Jamie P Levine
BACKGROUND:  Recipient vessels proximal to the zone of injury have traditionally been preferred for lower extremity reconstruction. However, more recent data have shown mixed outcomes when performing anastomoses distal to the zone of injury. We investigated the impact of recipient vessel location on free flap outcomes. METHODS:  Retrospective review (1979-2016); 312 soft tissue free flaps for open tibia fractures met inclusion criteria. Flap characteristics and perioperative outcomes were examined...
April 6, 2018: Journal of Reconstructive Microsurgery
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