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David Hasler, Dominik Obrist
The flow field past a prosthetic aortic valve comprises many details that indicate whether the prosthesis is functioning well or not. It is, however, not yet fully understood how an optimal flow scenario would look, i.e. which subtleties of the fluid dynamics in place are essential regarding the durability and compatibility of a prosthetic valve. In this study, we measured and analyzed the 3D flow field in the vicinity of a bio-prosthetic heart valve in function of the aortic root size. The measurements were conducted within aortic root phantoms of different size, mounted in a custom-built hydraulic setup, which mimicked physiological flow conditions in the aorta...
2018: PloS One
Yang Xiong, Lin Xu, Xing Yu, Yongdong Yang, Dingyan Zhao, Zhengguo Hu, Chuanhong Li, He Zhao, Lijun Duan, Bingbing Zhang, Sixue Chen, Tao Liu
STUDY DESIGN: A retrospective study. OBJECTIVE: To compare the mid-term outcomes of hybrid surgery and anterior cervical discectomy and fusion for the treatment of contiguous 2-segment cervical degenerative disc diseases. SUMMARY OF BACKGROUND DATA: Hybrid surgery has become one of the most controversial subjects in spine communities, and the comparative studies of hybrid surgery and anterior cervical discectomy and fusion in the mid- and long-term follow-up are rarely reported...
March 15, 2018: Spine
Ayman Ebied, Ahmed Zayda, Sameh Marei, Hany Elsayed
INTRODUCTION: Successful treatment of knee comminuted periarticular fractures associated with osteoporosis and pre-existing arthritis is a challenging task. METHODS: This is a prospective study on 27 patients who had comminuted intra and periarticular knee fractures and pre-existing arthritis. Fractures were classified according to Muller's AO classification. Primary knee arthroplasty was performed ± internal fixation following 4 weeks of splinting. A stem was added to the tibial tray and Legacy Constrained Condylar Knee (LCCK) or Rotating Hinge (RH) prosthesis were used depending on the level of ligament damage and bone defects...
2018: SICOT-J
Philipp Marx, Wojciech Kowalczyk, Aydin Demircioglu, Gary Neil Brault, Hermann Wendt, Sharaf-Eldin Shehada, Konstantinos Tsagakis, Mohamed El Gabry, Heinz Jakob, Daniel Wendt
The aim of the present in vitro study was the evaluation of the fluid dynamical performance of the Carpentier-Edwards PERIMOUNT Magna Ease depending on the prosthetic size (21, 23, and 25 mm) and the cardiac output (3.6-6.4 L/min). A self-constructed flow channel in combination with particle image velocimetry (PIV) enabled precise results with high reproducibility, focus on maximal and local peek velocities, strain, and velocity gradients. These flow parameters allow insights into the generation of forces that act on blood cells and the aortic wall...
2018: BioMed Research International
Hammad Parwaiz, Sherif Elnikety
Kienböck's disease is characterised by avascular necrosis of the lunate bone, and over the years it has been a challenging disease to manage, with differing opinions on the best intervention. We present an interesting case of a metallic unconstrained lunate replacement that is still functioning well in a patient 40 years after surgery. This case report represents the longest follow-up of any such prosthesis.
March 15, 2018: BMJ Case Reports
Jason E Hsu, Moni B Neradilek, Stacy M Russ, Frederick A Matsen
BACKGROUND: Propionibacterium-specific cultures are commonly positive in revised shoulders without obvious signs of infection. To help identify patients at risk for these "stealth" presentations of positive Propionibacterium cultures, we assessed the value of a preoperative skin culture in predicting the results of deep cultures obtained at the time of revision shoulder arthroplasty in patients without clinical evidence of infection. METHODS: The study enrolled 60 patients undergoing revision for a prior shoulder arthroplasty without clinical evidence of infection...
March 12, 2018: Journal of Shoulder and Elbow Surgery
Tabassum Ahsan Qadeer
Orthodontic alignment of un-erupted dilacerated teeth is challenging, as the bent roots resist forces applied to move them through the bone. Various treatment options are now available to treat this condition including providing prosthesis after extractions and apicectomies. However, to maintain alveolar bone in the area of the un-erupted tooth, especially if the involved tooth is in the anterior segment, the ideal treatment would be to try and bring the tooth in the arch orthodontically. Treatment requires increased time duration, compliance of the patient, and consistent force mechanics...
March 2018: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
Brian W Carey, James Harty
BACKGROUND: The ATTUNE Knee by DePuy Synthes was introduced in 2013. It is designed to provide better range of motion and address patient-reported instability. The PFC Sigma Knee, an earlier prosthesis by DePuy Synthes, is a common knee replacement with a strong clinical track record. Our aim is to compare the outcomes after primary total knee replacement for end-stage knee osteoarthritis of the PFC and ATTUNE knee systems in 21 patients who each have prosthesis in opposite knees using WOMAC, Oxford Knee and SF-12 scores and evaluation of range of motion...
March 15, 2018: Journal of Orthopaedic Surgery and Research
Linda Resnik, He Helen Huang, Anna Winslow, Dustin L Crouch, Fan Zhang, Nancy Wolk
BACKGROUND: Although electromyogram (EMG) pattern recognition (PR) for multifunctional upper limb prosthesis control has been reported for decades, the clinical benefits have rarely been examined. The study purposes were to: 1) compare self-report and performance outcomes of a transradial amputee immediately after training and one week after training of direct myoelectric control and EMG pattern recognition (PR) for a two-degree-of-freedom (DOF) prosthesis, and 2) examine the change in outcomes one week after pattern recognition training and the rate of skill acquisition in two subjects with transradial amputations...
March 15, 2018: Journal of Neuroengineering and Rehabilitation
Bruno Tochetto Primo, Leonardo Marcos Mezzari, Luís Carlos da Fontoura Frasca, Raquel Linderman, Elken Gomes Rivaldo
PURPOSE: To evaluate and compare the clinical and radiographic outcomes of mandibular rehabilitation with fixed prostheses on three implants with immediate versus delayed loading. MATERIALS AND METHODS: The sample comprised 21 patients who underwent treatment with immediate loading and 23 who received delayed loading. All had worn their prostheses for at least 18 months. Radiographic evaluation of bone loss was carried out in Adobe Photoshop CS5 by a single calibrated examiner using digitized panoramic radiographs...
March 15, 2018: International Journal of Oral & Maxillofacial Implants
Chaiane Emilia Dalazen, Rafael Aiello Bomfim, Alessandro Diogo De-Carli
The scope of this study was to identify individual and contextual factors associated with the self-perceived need for dental treatment and for prostheses among elderly Brazilians. An analysis was performed with data from the SB Brazil 2010 epidemiological survey conducted by the Ministry of Health with a sample of 7,619 elderly individuals. Multilevel logistic regression models of mixed random and fixed effects were used to the estimate odds ratio (OR) with 95% confidence interval (95% CI) between the dependent variables and individual and contextual factors...
March 2018: Ciência & Saúde Coletiva
Eduardo José Pereira Oliveira, Vinício Felipe Brasil Rocha, Denismar Alves Nogueira, Alessandro Aparecido Pereira
This research aimed to assess the oral health related to quality of life among hypertensive and diabetic patients in the city of Alfenas, Brazil. This was a domiciliary-based, descriptive-analytical, cross-sectional research with a random, systematic sample stratified by the Family Health Team, consisting of 218 individuals. The following indexes were applied: DMFT, T-Health, FS-T, SiC index, use and need of prosthesis and OHIP-14. Most of the patients (56.42%) had only high blood pressure, were females (67...
March 2018: Ciência & Saúde Coletiva
Aoife Healy, Sybil Farmer, Anand Pandyan, Nachiappan Chockalingam
BACKGROUND: Assistive products are items which allow older people and people with disabilities to be able to live a healthy, productive and dignified life. It has been estimated that approximately 1.5% of the world's population need a prosthesis or orthosis. OBJECTIVE: The objective of this study was to systematically identify and review the evidence from randomized controlled trials assessing effectiveness and cost-effectiveness of prosthetic and orthotic interventions...
2018: PloS One
Vlad Ciobotaru, Nicolas Combes, Claire A Martin, Eloi Marijon, Eric Maupas, Augustin Bortone, Eric Bruguière, Jean-Benoit Thambo, Emmanuel Teiger, Pénélope Pujadas-Berthault, Julien Ternacle, Xavier Iriart
AIMS: To assess the predictive value of simulation based on 3D-printed models before left atrial appendage occlusion (LAAO) for peri-device leaks (PDL) and the impact on procedural outcomes compared to conventional imaging. METHODS AND RESULTS: 76 patients referred for LAAO with double disc device underwent construction of a 3D-printed LA model using flexible photopolymer resin. An implant simulation was performed retrospectively in Group 1 (55 patients), blinded to implanted device size, and prospectively in Group 2 (21 patients)...
March 13, 2018: EuroIntervention
Daphne L Mourits, Dyonne T Hartong, Birgit I Lissenberg-Witte, Machteld I Bosscha, H Stevie Tan, Annette C Moll
PURPOSE: To report the cosmetic outcome and late effects of enucleation and/or irradiation for retinoblastoma and to evaluate the role of orbital implants. METHODS: Patients (age >4 years) enucleated and/or irradiated for retinoblastoma, visiting the hospital for routine follow-up (April 2013 to May 2015), were included in our cross-sectional study. Data were obtained via clinical records, questionnaires, physical measurements and standardized photographs. Two independent observers scored the cosmetic features: upper eyelid position, lower eyelid position, volume deficiency, and prosthesis motility and overall cosmetic appearance...
March 14, 2018: Acta Ophthalmologica
Jun Liu, Ping Zhen, Sheng-Hu Zhou, Qi Tian, Hui Chen, Wei Wang, Xiao-le He, Xu-Sheng Li
OBJECTIVE: To evaluate the manipulation technique and clinical outcome of Tri-Lock bone preservation stem for acetabular protrusion combined with shorten defect of femoral head and neck. METHODS: From January 2013 to December 2015, 10 patients(12 hips) with acetabular protrusion combined with shorten defect of femoral head and neck were treated with total hip arthroplasty(THA) including 5 males and 5 female with an average age of(51.6±3.0) years old ranging from 42...
February 25, 2018: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
Shinya Higuchi, Iwao Matsunaga, Kiyokazu Koga, Eiichi Teshima, Atsuhiro Nakashima, Ryuji Tominaga, Tsuyoshi Ito
In almost every type of artificial valve, structural failure has been described. We are reporting on a case of a sudden leaflet escape of an Edwards TEKNA mitral valve prosthesis 12 years after implantation. The patient had a sudden onset of dyspnea and severe pulmonary edema with subsequent cardiogenic shock. An emergency mitral replacement was successfully performed. A multi-detector computed tomography scanning and three-dimensional imaging showed two fragments that had embolized in the terminal aorta and the left common iliac artery...
March 13, 2018: General Thoracic and Cardiovascular Surgery
Lejo Johnson Chacko, Dominik T Schmidbauer, Stephan Handschuh, Alen Reka, Karl D Fritscher, Patrik Raudaschl, Rami Saba, Michael Handler, Peter P Schier, Daniel Baumgarten, Natalie Fischer, Elisabeth J Pechriggl, Erich Brenner, Romed Hoermann, Rudolf Glueckert, Anneliese Schrott-Fischer
Stable posture and body movement in humans is dictated by the precise functioning of the ampulla organs in the semi-circular canals. Statistical analysis of the interrelationship between bony and membranous compartments within the semi-circular canals is dependent on the visualization of soft tissue structures. Thirty-one human inner ears were prepared, post-fixed with osmium tetroxide and decalcified for soft tissue contrast enhancement. High resolution X-ray microtomography images at 15 μm voxel-size were manually segmented...
2018: Frontiers in Neuroscience
Aravind K Bommiasamy, Dayton Opel, Raluca McCallum, John D Yonge, Vicente Undurraga Perl, Christopher R Connelly, Darin Friess, Martin A Schreiber, Richard J Mullins
BACKGROUND: Traumatic hip dislocations (THD) are a medical emergency. There is debate whether the painful reduction of a dislocated hip should be first attempted using primary conscious sedation (PCS) or primary general anesthesia (PGA) METHODS: All cases of native THD from 2006 to 2015 in the trauma registry of a level 1 trauma center were reviewed. The primary outcome was successful reduction of the THD. RESULTS: 67 patients had a native, meaning not a hip prosthesis, THD...
February 27, 2018: American Journal of Surgery
Kerstin Hagberg
PURPOSE: To describe the rehabilitation experience and outcome of treatment with bone-anchored prostheses in individuals with bilateral transfemoral amputations (TFAs) treated in Sweden over a period of 25 years. METHOD: Hospital records were reviewed for all patients with traumatic bilateral TFAs treated until 2015. The use of prostheses, walking aids and wheelchairs was noted. RESULTS: The cohort comprised 12 patients (nine men and three women with a mean age 35 years at treatment) and the median follow-up time was seven years (1-20)...
March 14, 2018: Disability and Rehabilitation. Assistive Technology
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