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https://www.readbyqxmd.com/read/28227889/shape-memory-alloy-smart-knee-spacer-to-enhance-knee-functionality-model-design-and-finite-element-analysis
#1
Arvind Gautam, A Bhargavi Rani, Miguel A Callejas, Swati Ghosh Acharyya, Amit Acharyya, Dwaipayan Biswas, Vasundhra Bhandari, Paresh Sharma, Ganesh R Naik, Arvind Gautam, A Bhargavi Rani, Miguel A Callejas, Swati Ghosh Acharyya, Amit Acharyya, Dwaipayan Biswas, Vasundhra Bhandari, Paresh Sharma, Ganesh R Naik, Swati Ghosh Acharyya, Paresh Sharma, Vasundhra Bhandari, A Bhargavi Rani, Arvind Gautam, Dwaipayan Biswas, Miguel A Callejas, Amit Acharyya
In this paper we introduce Shape Memory Alloy (SMA) for designing the tibial part of Total Knee Arthroplasty (TKA) by exploiting the shape-memory and pseudo-elasticity property of the SMA (e.g. NiTi). This would eliminate the drawbacks of the state-of-the art PMMA based knee-spacer including fracture, sustainability, dislocation, tilting, translation and subluxation for tackling the Osteoarthritis especially for the aged people of 45-plus or the athletes. In this paper a Computer Aided Design (CAD) model using SolidWorks for the knee-spacer is presented based on the proposed SMA adopting the state-of-the art industry-standard geometry that is used in the PMMA based spacer design...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226027/serum-25-hydroxyvitamin-d-levels-are-associated-with-functional-capacity-but-not-with-postural-balance-in-osteoporotic-postmenopausal-women
#2
Guilherme Carlos Brech, Emmanuel Gomes Ciolac, Mark D Peterson, Júlia Maria D'Andréa Greve
OBJECTIVES: In post-menopausal women with osteoporosis, insufficient vitamin D levels decrease calcium fixation in the bones and calcium transport in the sarcoplasmic reticulum, which impairs muscle strength, possibly leading to detrimental consequences for the preservation of functional capacity and postural balance, fall prevention, and fracture risk. The aim of this study was to evaluate the association between vitamin D levels and knee muscle strength, postural balance and functional mobility among postmenopausal women with osteoporosis...
January 1, 2017: Clinics
https://www.readbyqxmd.com/read/28223094/a-decade-of-the-catalonian-arthroplasty-register-racat-variability-exhaustivity-and-survival-of-prostheses-between-2005-and-2014
#3
J Arias-de la Torre, A Capdevila, O Martínez, L Domingo, M Marinelli, N Robles, J Nardi, L Puig-Verdié, F Pallisó, M Espallargues
BACKGROUND AND AIM: The Catalonian Arthroplasty Register (RACat) is a public health-based population register used to analyse and evaluate hip and knee replacements in Catalonia. The aim of this study is to present the outcomes after 10 years in operation (January 2005-December 2014). METHODOLOGY: Using the information from the RACat and the minimum basic data set at hospital discharge, an analysis was made of the quality and exhaustivity of the data, as well as a descriptive analysis of the patients, prostheses, and care process...
February 17, 2017: Revista Española de Cirugía Ortopédica y Traumatología
https://www.readbyqxmd.com/read/28220268/anterolateral-ligament-expert-group-consensus-paper-on-the-management-of-internal-rotation-and-instability-of-the-anterior-cruciate-ligament-deficient-knee
#4
REVIEW
Bertrand Sonnery-Cottet, Matthew Daggett, Jean-Marie Fayard, Andrea Ferretti, Camilo Partezani Helito, Martin Lind, Edoardo Monaco, Vitor Barion Castro de Pádua, Mathieu Thaunat, Adrian Wilson, Stefano Zaffagnini, Jacco Zijl, Steven Claes
Purpose of this paper is to provide an overview of the latest research on the anterolateral ligament (ALL) and present the consensus of the ALL Expert Group on the anatomy, radiographic landmarks, biomechanics, clinical and radiographic diagnosis, lesion classification, surgical technique and clinical outcomes. A consensus on controversial subjects surrounding the ALL and anterolateral knee instability has been established based on the opinion of experts, the latest publications on the subject and an exchange of experiences during the ALL Experts Meeting (November 2015, Lyon, France)...
February 20, 2017: Journal of Orthopaedics and Traumatology: Official Journal of the Italian Society of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/28219089/arthroscopic-treatment-of-isolated-hoffa-fractures
#5
Ersin Ercin, Emre Baca, Cemal Kural
The goal of this study was to evaluate the results of a novel method, arthroscopic fixation of isolated Hoffa fractures.This is a prospective, case series and set at Level 1 trauma center. A total of eight patients with isolated Hoffa fractures who were operated by arthroscopic screw fixation method in the anterior posterior direction with 6.5 mm cannulated screws were followed up prospectively. Same surgical method used for all patients. All patients underwent the same rehabilitation program and active range of motion (ROM) exercises were started immediately...
February 20, 2017: Journal of Knee Surgery
https://www.readbyqxmd.com/read/28216747/complex-ao-type-c3-distal-femur-fractures-results-after-fixation-with-a-lateral-locked-plate-using-modified-swashbuckler-approach
#6
Anuj Agrawal, Vivek Kiyawat
BACKGROUND: Complex AO type C3 fractures of the distal femur are challenging injuries, fraught with complications such as malunion and stiffness. We prospectively evaluated a consecutive series of patients with complex AO type C3 distal femur fractures to determine the clinicoradiological outcome after fixation with a single locked plate using modified swashbuckler approach. MATERIALS AND METHODS: 12 patients with C3 type distal femur fractures treated with a lateral locked plate, using a modified swashbuckler approach, were included in the study...
January 2017: Indian Journal of Orthopaedics
https://www.readbyqxmd.com/read/28210944/postoperative-imaging-in-arthroscopic-hip-surgery
#7
REVIEW
F Di Pietto, V Chianca, R de Ritis, E Cesarano, A Reginelli, A Barile, M Zappia, L Ginolfi
Arthroscopic surgery of the hip, compared to that of the knee or the shoulder, has only recently been developed in any significant way. Current indications for arthroscopic surgery of the hip include: diagnosis and treatment of lesions symptomatic of the acetabular labrum, femoroacetabular impingement (FAI), chondral lesions, joint infections, lesions of the teres ligament, impingement of the psoas tendon, pathology of the peritrochanteric space, external snapping hip (coxa saltans), and traumatic and atraumatic instability...
February 16, 2017: Musculoskeletal Surgery
https://www.readbyqxmd.com/read/28210788/surgical-management-of-degenerative-meniscus-lesions-the-2016-esska-meniscus-consensus
#8
Ph Beaufils, R Becker, S Kopf, M Englund, R Verdonk, M Ollivier, R Seil
PURPOSE: A degenerative meniscus lesion is a slowly developing process typically involving a horizontal cleavage in a middle-aged or older person. When the knee is symptomatic, arthroscopic partial meniscectomy has been practised for a long time with many case series reporting improved patient outcomes. Since 2002, several randomised clinical trials demonstrated no additional benefit of arthroscopic partial meniscectomy compared to non-operative treatment, sham surgery or sham arthroscopic partial meniscectomy...
February 16, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28208958/radiological-and-histopathological-outcome-of-giant-cell-tumor-of-femur-with-denosumab-treatment-a-case-report
#9
Preethi Dileep Menon, R Krishnakumar, Annie Jojo
Giant Cell Tumour of Bone (GCTB) is a benign but locally aggressive osteolytic skeletal neoplasm of young adults consisting of giant cells expressing RANK (Receptor Activator of Nuclear Factor-κB) and mesenchymal spindle-like stromal cells expressing RANKL (RANK ligand). The interaction of these cells leads to bone resorption. Recently, the RANKL inhibitor, denosumab, has demonstrated activity against giant-cell tumours. The current article reports a case of a Giant cell tumour of left distal femur with pathological fracture...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28205230/forensic-identification-of-bipartite-patella-misdiagnosed-as-patella-fracture
#10
Jingyuan Ma, Fang Shi, Chongya Huang, Shanzhi Gu
Bipartite patella is recognized as a developmental anomaly of ossification. Most of them are asymptomatic and are discovered incidentally. Bipartite patella is sometimes misdiagnosed as a patella fracture, because the x-ray images of both these conditions may appear very similar. In this case, the patient complained of left knee pain after x-ray films revealed a fracture-like line in the left patella. The patient was then diagnosed as having a patella fracture. In China, the injury degree is categorized as serious injury, minor injury, and trivial injury...
February 15, 2017: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/28195606/use-of-articulating-spacer-technique-in-revision-total-knee-arthroplasty-complicated-by-sepsis-a-systematic-meta-analysis
#11
John C Spivey, George N Guild, Giles R Scuderi
Periprosthetic infection after total knee arthroplasty is a devastating complication, and 2-stage exchange is the standard of care in North America. Articulating spacers are effective in treating periprosthetic joint infections, but the optimal articulating spacer construct has yet to be identified. The authors performed a systematic review using MEDLINE, MEDLINE In-Process, EMBASE, BIOSIS, ClinicalTrials.gov, and Cochrane Database of Systematic Reviews. They identified 34 articles meeting inclusion criteria, producing 1016 spacers for comparison...
February 13, 2017: Orthopedics
https://www.readbyqxmd.com/read/28194386/femur-lengthening-with-monoplanar-external-fixator-associated-with-locked-intramedullary-nail
#12
Henrique Paradella Alvachian Fernandes, Danilo Gabriel do Nascimento Silva Barronovo, Fabio Lucas Rodrigues, Marcos Hono
OBJECTIVE: This study aimed to demonstrate that the lengthening technique of an external fixator associated with locked intramedullary nail is an efficient method that decreases the duration of the external fixation and improves the rehabilitation period. METHODS: From January of 2005 to May of 2014, 31 patients with mean lower limb discrepancy of 5.31 cm were treated. The etiologies of the deformity were femur fracture sequelae, infection, hip development dysplasia, polio, and congenital short femur...
January 2017: Revista Brasileira de Ortopedia
https://www.readbyqxmd.com/read/28193138/removal-of-interlocking-intramedullary-nail-for-relieve-of-knee-pain-after-tibial-fracture-repair
#13
Shaodong Zhang, Xiaotao Wu, Lei Liu, Chen Wang
OBJECTIVE: To investigate the effects of intramedullary nail removal after tibial fracture repair. METHODS: Sixty patients at our hospital were enrolled in a prospective study and divided into moderate/severe knee pain (visual analog scale (VAS) ≥ 4) and mild/no knee pain (VAS < 4) groups after interlocking intramedullary nailing. Variables studied included the distance from the tip of the nail to the tibial plateau and the front of the tibia on a normalized lateral X-ray, the VAS score of knee and ankle pain, the range of motion of the knee and ankle, and Johner-Wruhs criteria before, 6 weeks after operation, and at the last follow-up...
January 2017: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/28192826/the-management-of-bone-defects-in-periarticular-knee-injuries-a-review-article
#14
Brian Buck, Yvonne M Murtha
Traumatic bone defects of the distal femur and proximal tibia present treatment challenges for the orthopaedic traumatologist. In addition to bone loss, significant soft tissue compromise and cartilage defects leave the patient and surgeon with few reconstructive options for proper long-term joint function. These injuries are often complicated by delayed healing, nonunion, malunion, infection, and poor subjective patient outcomes. There are a variety of clinical problems associated with the treatment of periarticular fractures about the knee...
February 13, 2017: Journal of Knee Surgery
https://www.readbyqxmd.com/read/28190582/correlation-of-parameters-on-preoperative-ct-images-with-intra-articular-soft-tissue-injuries-in-acute-tibial-plateau-fractures-a-review-of-132-patients-receiving-arif
#15
Hao-Che Tang, I-Jung Chen, Yu-Cheng Yeh, Chun-Jui Weng, Shih-Sheng Chang, Alvin Chao-Yu Chen, Yi-Sheng Chan
INTRODUCTION: Tibial plateau fractures often occur in conjunction with soft-tissue injuries of knees. The hypothesis of this study is that parameters of CT imaging can predict intra-articular soft-tissue injuries. PATIENTS AND METHODS: Patients who underwent arthroscopically assisted reduction and internal fixation (ARIF) for acute tibial plateau fractures performed by a single orthopedic surgeon between 2005 and 2015 were included in this retrospective study. Patients with concomitant ipsilateral femoral fractures, who had received revision surgery or who had undergone index surgery more than 30days from the event were excluded...
January 30, 2017: Injury
https://www.readbyqxmd.com/read/28180118/spontaneous-hemarthrosis-of-the-knee-late-complication-of-flexible-femur-nailing-a-case-report
#16
Indranil V Kushare, Matthew E Oetgen, Suzanne J Walters
We present a case report of acute spontaneous knee hemarthosis due to erosion of the nail through the knee joint capsule in a boy, seven months following retrograde flexible nailing for fractured femur. Careful positioning of the location of the insertion site of flexible nails and proper nail tip management are important to avoid this rare late complication.
September 2016: Trauma Monthly
https://www.readbyqxmd.com/read/28180114/paddle-boarding-fun-new-sport-or-an-accident-waiting-to-happen
#17
Shree-Eesh Waydia, Timothy Woodacre
BACKGROUND: Stand-up paddle-boarding is an increasingly popular water sport; however no published data to our knowledge exists on the nature and type of injuries sustained in this sport. OBJECTIVES: This study aims to describe the frequency, pattern, and mechanism of paddle-boarding injuries. MATERIALS AND METHODS: Descriptive data of paddle-boarding injuries were collected using an interactive website-based, multiple-choice survey. Data were collected from May 2012 over a 6-month period...
July 2016: Trauma Monthly
https://www.readbyqxmd.com/read/28173978/the-effects-of-tibia-profile-distraction-angle-and-knee-load-on-wedge-instability-and-hinge-fracture-a-finite-element-study
#18
Pei-Wei Weng, Chia-Hsien Chen, Chu-An Luo, Jui-Sheng Sun, Yang-Hwei Tsuang, Cheng-Kung Cheng, Shang-Chih Lin
Several plate systems for high tibial osteotomy (HTO) have been developed to stabilize the opening wedge of an osteotomized tibia. Among them, the TomoFix system, having a quasi-straight and T-shaped design, has been widely adopted in the literature. However, this system is implemented by inserting a lag (i.e., cortical) screw through the proximal combi-hole, to deform the plate and pull the distal tibia toward the plate. This process potentially induces plate springback and creates an elastic preload on the osteotomized tibia, especially at the lateral hinge of the distracted wedge...
February 4, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28173689/evaluation-of-geographic-indices-describing-health-care-utilization
#19
Agnus M Kim, Jong Heon Park, Sungchan Kang, Yoon Kim
Objectives: The accurate measurement of geographic patterns of health care utilization is a prerequisite for the study of geographic variations in health care utilization. While several measures have been developed to measure how accurately geographic units reflect the health care utilization patterns of residents, they have been only applied to hospitalization and need further evaluation. This study aimed to evaluate geographic indices describing health care utilization. Methods: We measured the utilization rate and four health care utilization indices (localization index, outflow index, inflow index, and net patient flow) for eight major procedures (coronary artery bypass graft surgery, percutaneous transluminal coronary angioplasty, surgery after hip fracture, knee replacement surgery, caesarean sections, hysterectomy, computed tomography scans, and magnetic resonance imaging scans) according to three levels of geographic units in Korea...
January 2017: Journal of Preventive Medicine and Public Health, Yebang Ŭihakhoe Chi
https://www.readbyqxmd.com/read/28170363/fixation-of-chondral-only-shear-fractures-of-the-knee-in-pediatric-and-adolescent-athletes
#20
Peter D Fabricant, Yi-Meng Yen, Dennis E Kramer, Mininder S Kocher, Lyle J Micheli, Benton E Heyworth
No abstract text is available yet for this article.
March 2017: Journal of Pediatric Orthopedics
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