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Orthopaedic Surgery

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https://www.readbyqxmd.com/read/28300359/influence-of-different-boundary-conditions-in-finite-element-analysis-on-pelvic-biomechanical-load-transmission
#1
Pan Hu, Tao Wu, Hui-Zhi Wang, Xin-Zheng Qi, Jie Yao, Xiao-Dong Cheng, Wei Chen, Ying-Ze Zhang
OBJECTIVE: To observe the effects of boundary conditions and connect conditions on biomechanics predictions in finite element (FE) pelvic models. METHODS: Three FE pelvic models were constructed to analyze the effect of boundary conditions and connect conditions in the hip joint: an intact pelvic model assumed contact of the hip joint on both sides (Model I); and a pelvic model assumed the hip joint connecting surfaces fused together with (Model II) or without proximal femurs (Model III)...
March 16, 2017: Orthopaedic Surgery
https://www.readbyqxmd.com/read/28300344/intramedullary-nailing-combined-with-bone-grafting-for-benign-lesions-of-the-proximal-femur
#2
Yan Zhang, Jia-Zhen Li, Xin-Chang Lu, Yi Zhang, Huai-Shuan Zhang, Hai-Long Shi, Zheng Lei, Guang Feng, Wei-Ping Fu
OBJECTIVE: To evaluate the effectiveness of intramedullary nailing for benign lesions of the proximal femur. METHOD: A retrospective analysis was carried out on 68 cases of benign lesions in the proximal femur at our hospital from April 2002 to April 2013 (38 men and 30 women). Mean age at surgery was 35.5 years (range, 22-56 years). The cases were divided into two groups: curettage of the lesion with bone grafting only as the grafting group (32 cases) and internal fixation after removal of the lesion as the fixation group (36 cases)...
March 16, 2017: Orthopaedic Surgery
https://www.readbyqxmd.com/read/28294528/effect-of-intraoperative-dexamethasone-on-pain-scores-and-narcotic-consumption-in-patients-undergoing-total-knee-arthroplasty
#3
Jason Samona, Carrie Cook, Kyle Krupa, Krystle Swatsell, Andrew Jackson, Chase Dukes, Sidney Martin
OBJECTIVE: To examine whether the addition of intravenous dexamethasone during total knee arthroplasty (TKA) would be effective at reducing postoperative pain scores and postoperative opioid consumption. METHODS: A total of 102 patients undergoing TKA were placed into two groups: 55 subjects received intraoperative dexamethasone 8 mg intravenously (treatment group) and 47 did not receive dexamethasone at any time during the perioperative period. Comparison was made using the 0-10 numeric pain rating scale and the amount of opioids used in each group...
March 15, 2017: Orthopaedic Surgery
https://www.readbyqxmd.com/read/28296225/treatment-of-medial-malleolus-or-pure-deltoid-ligament-injury-in-patients-with-supination-external-rotation-type-iv-ankle-fractures
#4
Xu Wang, Chao Zhang, Jian-Wen Yin, Chen Wang, Jia-Zhang Huang, Xin Ma, Cheng-Wei Wang, Xue Wang
OBJECTIVE: To investigate the effect of internal fixation on postoperative ankle function in patients with supination-external rotation type IV ankle fractures, including medial malleolus fractures and deltoid ligament injury. METHODS: Between January 2012 and June 2014, patients with medial structure injuries were enrolled in this study and assigned to the medial malleolus fracture group or the deltoid ligament group. The surgical procedures for the two groups were documented...
March 10, 2017: Orthopaedic Surgery
https://www.readbyqxmd.com/read/28276661/anterior-lumbar-interbody-fusion-in-left-sided-inferior-vena-cava-and-right-sided-aortic-arch
#5
Kevin Phan, Bernard A M Fang, Monish M Maharaj, Andrew F Lennox, Ralph J Mobbs
Spinal fusion via anterior lumbar interbody fusion (ALIF) can offer symptomatic relief to patients that suffer severe low back pain, radiculopathy, and claudication. However, a detailed working knowledge of the thoracic, abdominal, and lumbar anatomy, particularly of the vasculature, is vital. We report the case of a 68-year-old man who presented with radiculopathy and progressively worsening low back pain despite 9 months of unsuccessful conservative therapy and pain management. Preoperative computed tomography and magnetic resonance imaging revealed a rare anatomical variation, with an anomalous left-sided inferior vena cava and anomalous aorta...
March 9, 2017: Orthopaedic Surgery
https://www.readbyqxmd.com/read/28276651/realignment-surgery-for-malunited-ankle-fracture
#6
Chang-Jun Guo, Xing-Cheng Li, Mu Hu, Yang Xu, Xiang-Yang Xu
OBJECTIVE: To investigate the characteristics and the results of realignment surgery for the treatment of malunited ankle fracture. METHODS: Thirty-three patients with malunited fractures of the ankle who underwent reconstructive surgery at our hospital from January 2010 to January 2014 were reviewed. The tibial anterior surface angle (TAS), the tibiotalar tilt angle (TTA), the malleolar angle (MA), and the tibial lateral surface angle (TLS) were measured. Clinical assessment was performed with use of the American Orthopaedic Foot and Ankle Society (AOFAS) scale and visual analogue scale (VAS) scores, and the osteoarthritis stage was determined radiographically with the modified Takakura classification system...
March 9, 2017: Orthopaedic Surgery
https://www.readbyqxmd.com/read/28276650/comparison-of-arthrodesis-and-non-fusion-to-treat-lisfranc-injuries
#7
Yu-Sen Qiao, Jun-Kun Li, Hao Shen, Hai-Yan Bao, Ming Jiang, Yan Liu, Wasim Kapadia, Hong-Tao Zhang, Hui-Lin Yang
OBJECTIVE: "Lisfranc joint injury" is comprised of a tarsometatarsal joint-complex injury. The Lisfranc complex injury is always a challenge for orthopedists, and the optimum treatment is still up for debate. Anatomic reduction and stable internal fixation prove to have no satisfactory outcomes. This research aims to compare the clinical curative effects, complications and radiographic features of arthrodesis and non-fusion of the Lisfranc joint in the follow-up of the patients who suffered Lisfranc injuries...
March 9, 2017: Orthopaedic Surgery
https://www.readbyqxmd.com/read/28276647/clinical-comparison-of-extensile-lateral-approach-and-sinus-tarsi-approach-combined-with-medial-distraction-technique-for-intra-articular-calcaneal-fractures
#8
Hai-Chao Zhou, Tao Yu, Hao-Yang Ren, Bing Li, Kai Chen, You-Guang Zhao, Yun-Feng Yang
OBJECTIVE: To study and compare the clinical outcomes of open reduction and internal fixation via extensile L-shape incision and limited open reduction via the sinus tarsi approach using the medial distraction technique for intra-articular calcaneal fractures. METHODS: We performed a retrospective review of 65 intra-articular calcaneal fractures treated operatively between March 2012 and February 2015. Patients were divided into two groups: 28 were in the sinus tarsi approach group and 37 were in the extensile lateral approach group...
March 9, 2017: Orthopaedic Surgery
https://www.readbyqxmd.com/read/28276642/role-of-clavicle-chest-cage-angle-difference-in-predicting-postoperative-shoulder-balance-in-lenke-5c-adolescent-idiopathic-scoliosis-patients-after-selective-posterior-fusion
#9
Zhen Liu, Zong-Shan Hu, Yong Qiu, Zhen Zhang, Zhi-Hui Zhao, Xiao Han, Ze-Zhang Zhu
OBJECTIVE: To evaluate the role of preoperative clavicle chest cage angle difference (CCAD) on postoperative radiographic shoulder imbalance, patient's satisfaction and surgeon's fulfillment in Lenke 5 adolescent idiopathic scoliosis (AIS). CCAD, as a novel radiographic parameter, has proven to be a reliable predictor for postoperative shoulder imbalance in Lenke 1 AIS patients. However, the value of CCAD in predicting shoulder balance has never been evaluated in Lenke 5 AIS patients...
March 9, 2017: Orthopaedic Surgery
https://www.readbyqxmd.com/read/28276640/prospective-review-of-mesenchymal-stem-cells-differentiation-into-osteoblasts
#10
REVIEW
Priyanka Garg, Matthew M Mazur, Amy C Buck, Meghan E Wandtke, Jiayong Liu, Nabil A Ebraheim
Stem cell research has been a popular topic in the past few decades. This review aims to discuss factors that help regulate, induce, and enhance mesenchymal stem cell (MSC) differentiation into osteoblasts for bone regeneration. The factors analyzed include bone morphogenic protein (BMP), transforming growth factor β (TGF-β), stromal cell-derived factor 1 (SDF-1), insulin-like growth factor type 1 (IGF-1), histone demethylase JMJD3, cyclin dependent kinase 1 (CDK1), fucoidan, Runx2 transcription factor, and TAZ transcriptional coactivator...
March 9, 2017: Orthopaedic Surgery
https://www.readbyqxmd.com/read/28276638/intravenous-zoledronic-acid-5%C3%A2-mg-on-bone-turnover-markers-and-bone-mineral-density-in-east-china-subjects-with-newly-diagnosed-osteoporosis-a-24-month-clinical-study
#11
Bo-Cheng Liang, Zhen-Yu Shi, Bo Wang, Peng Wu, Ling-Cheng Kong, Jian-Liang Yao, Chun-Wen Li, Xiao-Lin Shi
OBJECTIVE: This randomized, double-blind, placebo-controlled study assessed the necessity of early intervention, safety and efficacy of intravenous zoledronic acid 5 mg/year in East China women with newly diagnosed osteoporosis at high risk of fracture during a 24-month treatment period. METHODS: Subjects (57 [52-62] years old) were randomized 3:2 to zoledronic acid versus placebo (randomized at baseline, zoledronic acid [175 cases], placebo-zoledronic acid [110 cases])...
March 9, 2017: Orthopaedic Surgery
https://www.readbyqxmd.com/read/28093896/intravenous-combined-with-topical-administration-of-tranexamic-acid-in-primary-total-hip-arthroplasty-a-randomized-controlled-trial
#12
Yi Zeng, Hai-Bo Si, Bin Shen, Jing Yang, Zong-Ke Zhou, Peng-de Kang, Fu-Xing Pei
OBJECTIVE: Although there are still some controversies, large previous studies have confirmed that intravenous (i.v.) tranexamic acid (TXA) can effectively reduce blood loss and transfusions in total hip arthroplasty (THA) without increasing the risk of deep venous thrombosis. However, few studies have investigated the combination of i.v. and topical application of TXA in primary THA. The purpose of our current study is to examine whether i.v. combined with topical administration of TXA decreases postoperative blood loss and transfusion rates after THA...
January 17, 2017: Orthopaedic Surgery
https://www.readbyqxmd.com/read/28079306/open-dislocation-of-ankle-without-fracture-treated-with-an-external-fixator
#13
Emrah Sayit, Asli Tanrivermis Sayit, Elcin Zan
Ankle dislocations are orthopedic emergencies that require immediate treatment to avoid neurovascular impairment. They are usually accompanied by one or more comminuted fractures of the ankle mortis. In rare circumstances, such as high-energy trauma, the ankle dislocations may not be accompanied by concomitant malleolar fractures and, thus, are named "pure ankle dislocations". We presented a very rare and interesting case of an open medial dislocation of the ankle without associated fracture in an 18-year-old man with no known predisposing risk factors...
January 12, 2017: Orthopaedic Surgery
https://www.readbyqxmd.com/read/28067466/anterior-lumbar-interbody-fusion-integrated-screw-cages-intrinsic-load-generation-subsidence-and-torsional-stability
#14
Yusuf Assem, Matthew H Pelletier, Ralph J Mobbs, Kevin Phan, William R Walsh
OBJECTIVE: To perform a repeatable idealized in vitro model to evaluate the effects of key design features and integrated screw fixation on unloaded surface engagement, subsidence, and torsional stability. METHODS: We evaluated four different stand-alone anterior lumbar interbody fusion (ALIF) cages with two, three, and four screw designs. Polyurethane (saw-bone) foam blocks were used to simulate the vertebral bone. Fuji Film was used to measure the contact footprint, average pressure, and load generated by fixating the cages with screws...
January 9, 2017: Orthopaedic Surgery
https://www.readbyqxmd.com/read/28032714/n-acetylcysteine-attenuates-cobalt-nanoparticle-induced-cytotoxic-effects-through-inhibition-of-cell-death-reactive-oxygen-species-related-signaling-and-cytokines-expression
#15
Ya-Ke Liu, Hong-Wei Yang, Meng-Hong Wang, Wei Wang, Fan Liu, Hui-Lin Yang
OBJECTIVE: Complex cobalt-chromium alloys, bearing surfaces of the second-generation metal-on-metal (MoM) hip prostheses, are subject to wear and generate cobalt nanoparticles (CoNPs). CoNPs could reduce cellular viability, activate the mitogen-activated protein kinase (MAPK) pathway and increase cell apoptosis via reactive oxygen species (ROS). However, the detailed mechanisms of ROS functioning on CoNP-mediated signaling molecules and cytotoxicity has not yet been fully demonstrated...
November 2016: Orthopaedic Surgery
https://www.readbyqxmd.com/read/28032713/arthroscopic-retrieval-of-over-100-loose-bodies-in-shoulder-synovial-chondromatosis-a-case-report-and-review-of-literature
#16
REVIEW
Pradyumna Raval, Ashish Vijayan, Arpit Jariwala
Synovial chondromatosis is a rare and benign condition of unknown cause. It is also known as synovial osteochondromatosis. It is characterized by involvement of the synovial tissue, which lines various joints of our body. Initial symptoms range from pain in the joint, locking of the joint at times, especially the knee, to arthritis of the joint that is a late feature of this condition. Although large joints such as the knee are commonly affected, involvement of the shoulder joint is a rare occurrence. Historically an open arthrotomy was preferred for removal of loose bodies coupled with a thorough synovectomy...
November 2016: Orthopaedic Surgery
https://www.readbyqxmd.com/read/28032712/relationship-between-the-patellar-ridge-and-the-femoral-trochlea-in-the-patellar-tracking
#17
Xiao-Meng Wang, Hui-Xin Liu, Jing-Hui Niu, Gu-Man Duan, Fei Wang
OBJECTIVE: To investigate the anatomic morphology of the patellar ridge and how it matches the femoral trochlea in patellar tracking. METHOD: We selected 40 volunteers, 20 males (age, 28 ± 5 years) and 20 female (age, 27 ± 6 years), who were completely asymptomatic with normal knee structures. We measured the right or left legs of volunteers, and the region from the distal femur to the tibial tuberosity was scanned by computed tomography (CT) with flexion at 0°, 30°, 60°, and 90°...
November 2016: Orthopaedic Surgery
https://www.readbyqxmd.com/read/28032711/treatment-for-periprosthetic-cyst-after-total-hip-arthroplasty-analysis-of-six-cases
#18
Wei-Ding Cui, Wei-Min Fan, Zhe-Feng Chen, Feng Liu
The present study investigates the pathogenesis of periprosthetic cysts after total hip replacement, and explores appropriate treatment appoaches. Six patients with periprosthetic cysts after total hip arthroplasty were treated at the First Affiliated Hospital of Nanjing Medical University between 2009 and 2014. During surgery, it was found that all cysts communicated with the hip and the hip prosthesis could be seen after cyst excision. Four patients simply underwent cyst excision, and light red liquid was found in the cyst...
November 2016: Orthopaedic Surgery
https://www.readbyqxmd.com/read/28032710/anterior-and-posterior-instrumentation-with-different-debridement-and-grafting-procedures-for-multi-level-contiguous-thoracic-spinal-tuberculosis
#19
COMPARATIVE STUDY
Xu Cui, Li-Tao Li, Yuan-Zheng Ma
OBJECTIVE: To evaluate the clinical outcomes of anterior and posterior instrumentation with different debridement and graft fusion methods for multi-level contiguous thoracic spinal tuberculosis. METHODS: We retrospectively evaluated 81 patients with multi-level contiguous thoracic spinal tuberculosis who underwent anterior or posterior instrumentation combined with different methods of debridement, decompression, and graft fusion from January 2002 to December 2012...
November 2016: Orthopaedic Surgery
https://www.readbyqxmd.com/read/28032709/relationship-between-patellar-tracking-and-the-screw-home-mechanism-of-tibiofemoral-joint
#20
Li-Kang Zhang, Xiao-Meng Wang, Ying-Zhen Niu, Hui-Xin Liu, Fei Wang
OBJECTIVE: To demonstrate the effect of the screw-home motion on the stability of the patellofemoral joint, and investigate its mechanism of regulation of patellar tracking. METHODS: Twenty volunteers who met the criteria were examined. All subjects had axial computed tomography (CT) scanning performed on bilateral knees at 0° and 30° of flexion. Scanning began above the femorotibial articulation and femoral trochlear groove, and moved sequentially down to the level of the anterior tibial tubercle...
November 2016: Orthopaedic Surgery
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