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https://www.readbyqxmd.com/read/28100982/bilateral-lower-extremity-edema-caused-by-iliopsoas-bursal-distention-after-hip-arthroplasty
#1
Sameer K Avasarala, Syed T Ahsan
Lower-extremity edema is encountered by internists, nephrologists, vascular specialists, and many others. We report a case of an elderly woman who presented with a painful, swollen left leg. Without a clear diagnosis, she had been taking diuretics for the past 8 years for swelling in both legs. After extensive investigation, we found that her lower-extremity edema was due to bilateral iliopsoas bursal distention secondary to degeneration of her hip prostheses. Chronic breakdown of the polyethylene component of the hip prostheses had led to a communication between the artificial joints and the iliopsoas bursae...
December 2016: Texas Heart Institute Journal
https://www.readbyqxmd.com/read/28099454/high-cable-forces-deteriorate-pinch-force-control-in-voluntary-closing-body-powered-prostheses
#2
Mona Hichert, David A Abbink, Peter J Kyberd, Dick H Plettenburg
BACKGROUND: It is generally asserted that reliable and intuitive control of upper-limb prostheses requires adequate feedback of prosthetic finger positions and pinch forces applied to objects. Body-powered prostheses (BPPs) provide the user with direct proprioceptive feedback. Currently available BPPs often require high cable operation forces, which complicates control of the forces at the terminal device. The aim of this study is to quantify the influence of high cable forces on object manipulation with voluntary-closing prostheses...
2017: PloS One
https://www.readbyqxmd.com/read/28097422/novel-alignment-measurement-technique-for-total-knee-arthroplasty-using-patient-specific-instrumentation
#3
Kazumasa Yamamura, Yukihide Minoda, Shigekazu Mizokawa, Yoichi Ohta, Ryo Sugama, Suguru Nakamura, Hideki Ueyama, Hiroaki Nakamura
INTRODUCTION: This study was designed to evaluate the true accuracy of patient specific instrumentation (PSI) for total knee arthroplasty (TKA) using a new 3D measurement method. MATERIALS AND METHODS: Consecutive 21 patients (30 knees) who underwent TKA using computed tomography (CT)-based PSI were retrospectively evaluated. Mean patient age was 69.2 years (62 to 77). The postoperative three-dimensional (3D) CT image were superimposed onto the preoperative 3D CT plan and measured the absolute difference in the prosthetic alignment using six parameters: coronal, sagittal, and axial alignment of the femoral and tibial prostheses...
January 17, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28095521/evaluation-of-ultrashort-and-longer-implants-with-microrough-surfaces-results-of-a-24-to-36-month-prospective-study
#4
Luciano Malchiodi, Riccardo Caricasulo, Alessandro Cucchi, Raffaele Vinci, Enrico Agliardi, Enrico Gherlone
PURPOSE: The aim of this prospective study was to establish if ultrashort implants are a reliable therapeutic solution by evaluating their effect on mean crestal bone loss and assessing their survival and success rates. MATERIALS AND METHODS: Patients were treated using 6-, 9-, and 11-mm-long implants with sandblasted and acid-etched surfaces and fitted with fixed partial prostheses. Clinical and radiographic examinations were scheduled yearly. Data collected included the implant positioning site, implant length and diameter, peri-implant bone loss (PBL), and clinical and anatomical C/I ratios...
January 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28095358/axial-and-torsional-stiffness-of-pediatric-prosthetic-feet
#5
Paolo Taboga, Alena M Grabowski
BACKGROUND: Prosthetic stiffness likely affects the walking biomechanics of toddlers and children with leg amputations, but the actual stiffness values for prostheses are not reported by manufacturers or in standardized testing procedures. AIM: We measured axial (kA) and torsional (kT) stiffness from four brands of pediatric prosthetic feet (Trulife, Kingsley Mfg. Co., TRS Incorporated, and College Park Industries) over a range of foot sizes. METHODS: We applied forces and torques onto prostheses with a materials testing machine that replicated those exhibited in vivo by using the kinetics measured from four non-amputee toddlers (2-3years) during walking...
January 5, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28094680/changes-in-the-corticospinal-tract-after-wearing-prosthesis-in-bilateral-transtibial-amputation
#6
Sang Yoon Lee, Si Hyun Kang, Don-Kyu Kim, Kyung Mook Seo, Hee Joon Ro, Jae Kyun Kim
BACKGROUND: After amputation, the brain is known to be reorganized especially in the primary motor cortex. We report a case to show changes in the corticospinal tract in a patient with serial bilateral transtibial amputations using diffusion tensor imaging. Case Description and Methods: A 78-year-old man had a transtibial amputation on his left side in 2008 and he underwent a right transtibial amputation in 2011. An initial brain magnetic resonance imaging with a diffusion tensor imaging was performed before starting rehabilitation on his right transtibial prosthesis, and a follow-up magnetic resonance imaging with diffusion tensor imaging was performed 2 years after this...
January 1, 2017: Prosthetics and Orthotics International
https://www.readbyqxmd.com/read/28093117/the-biological-prosthesis-is-a-viable-option-for-abdominal-wall-reconstruction-in-pediatric-high-risk-defects
#7
Osnat Zmora, Shannon L Castle, Stephanie Papillon, James E Stein
BACKGROUND: Our aim was to explore the indications for and outcome of biological prostheses to repair high risk abdominal wall defects in children. METHODS: A retrospective chart review was performed of all cases of abdominal wall reconstruction in a single institution between 2007 and 2015. Demographic and clinical variables, technique and complications were described and compared between prosthesis types. RESULTS: A total of 23 patients underwent abdominal wall reconstruction using a biological prosthesis including 17 neonates...
January 6, 2017: American Journal of Surgery
https://www.readbyqxmd.com/read/28092288/sutureless-aortic-valves-who-is-the-right-patient
#8
Amine Mazine, Christopher Bonneau, Dimos Karangelis, Bobby Yanagawa, Subodh Verma, Daniel Bonneau
PURPOSE OF REVIEW: Sutureless aortic valve replacement (AVR) has emerged as an alternative to traditional AVR for patients with aortic stenosis who present a higher surgical risk, such as the elderly, or those with small or highly calcified aortic roots. With transcatheter aortic valve implantation - the other major AVR alternative - being used in increasingly lower-risk patients, the place of sutureless valves in the AVR landscape needs to be defined. In this review, we discuss recent data and expert opinion as it pertains to the subject of sutureless AVR...
January 13, 2017: Current Opinion in Cardiology
https://www.readbyqxmd.com/read/28091278/brief-activity-performance-measure-for-upper-limb-amputees-bam-ula
#9
Linda Resnik, Matthew Borgia, Frantzy Acluche
BACKGROUND: Measures of activity performance for adults with upper limb amputation are needed. The purposes of this study were to evaluate the measurement properties of a new measure of activity performance for adults with upper limb amputation, which we call the Brief Activity Measure for Upper Limb Amputees (BAM-ULA) and to compare BAM-ULA scores for users of different types of prostheses. METHODS: In all, 35 persons with upper limb amputation were administered the BAM-ULA, twice within 1 week...
January 1, 2017: Prosthetics and Orthotics International
https://www.readbyqxmd.com/read/28089825/clinical-and-radiographic-outcome-of-revision-surgery-of-total-elbow-prosthesis-midterm-results-in-19-cases
#10
Jetske Viveen, Ante Prkic, Koen L M Koenraadt, Izaäk F Kodde, Bertram The, Denise Eygendaal
BACKGROUND: The aim of this study is to report on the midterm outcomes and complications of revision surgery of total elbow arthroplasty. METHODS: All patients who had undergone total elbow arthroplasty revision surgery between 2009 and 2014 with semiconstrained total elbow prostheses were prospectively enrolled in the study. Records were reviewed for demographic data; baseline measurements; and several follow-up assessments including the Mayo Elbow Performance Score (MEPS), visual analog scale (VAS) score for pain, Oxford Elbow Score, range of motion, satisfaction, and radiographs...
January 13, 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28089334/masticatory-function-and-oral-health-related-quality-of-life-in%C3%A2-patients-after-partial-maxillectomies-with-closed-or%C3%A2-open%C3%A2-defects
#11
Mohamed M Said, Takafumi Otomaru, Yesiboli Yeerken, Hisashi Taniguchi
STATEMENT OF PROBLEM: The healing pattern after surgical resection of tumors of the oral cavity involving the maxilla may vary from one patient to another. The result may be open communication between the oral and nasal cavities (open defect) or complete oronasal separation after healing of the defect area (closed defect). PURPOSE: The purpose of this clinical study was to compare masticatory function and oral health-related quality of life (OHRQoL) between patients with closed and open defects who had undergone a partial maxillectomy and were wearing dentomaxillary prostheses...
January 12, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28089184/bone-wax-is-effective-in-reducing-blood-loss-after-total-knee-arthroplasty
#12
Ing H Moo, Jerry Y Q Chen, Eric H Pagkaliwaga, See W Tan, Kein B Poon
BACKGROUND: Total knee arthroplasty (TKA) is associated with major blood loss and blood transfusion is often required. This study aimed to evaluate the efficacy of bone wax in reducing blood loss and transfusion rates after TKA. METHODS: A prospective randomized controlled study that included 100 patients undergoing primary unilateral TKA with cement was conducted in a tertiary center between March 2014 and June 2014. The bone wax group received 2.5 g of bone wax, applied onto the uncovered bone around the prostheses and the nail holes before the tourniquet was released, whereas the control group had hemostasis achieved using electrocautery only...
December 24, 2016: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28088917/effects-of-heart-valve-prostheses-on-phase-contrast-flow-measurements-in-cardiovascular-magnetic-resonance-a-phantom-study
#13
Johanna Richau, Matthias A Dieringer, Julius Traber, Florian von Knobelsdorff-Brenkenhoff, Andreas Greiser, Carsten Schwenke, Jeanette Schulz-Menger
BACKGROUND: Cardiovascular Magnetic Resonance is often used to evaluate patients after heart valve replacement. This study systematically analyses the influence of heart valve prostheses on phase contrast measurements in a phantom trial. METHODS: Two biological and one mechanical aortic valve prostheses were integrated in a flow phantom. B0 maps and phase contrast measurements were acquired at a 1.5 T MR scanner using conventional gradient-echo sequences in predefined distances to the prostheses...
January 16, 2017: Journal of Cardiovascular Magnetic Resonance
https://www.readbyqxmd.com/read/28088693/reinforcement-of-a-pmma-resin-for-interim-fixed-prostheses-with-silica-nanoparticles
#14
Marianthi Topouzi, Eleana Kontonasaki, Dimitrios Bikiaris, Lambrini Papadopoulou, Konstantinos M Paraskevopoulos, Petros Koidis
PURPOSE: Fractures in long span provisional/interim restorations are a common complication. Adequate fracture toughness is necessary to resist occlusal forces and crack propagation, so these restorations should be constructed with materials of improved mechanical properties. The aim of this study was to investigate the possible reinforcement of neat silica nanoparticles and trietoxyvinylsilane-modified silica nanoparticles in a PMMA resin for fixed interim restorations. MATERIALS AND METHODS: Composite PMMA-Silica nanoparticles powders were mixed with PMMA liquid and compact bar shaped specimens were fabricated according to the British standard BS EN ISO 127337:2005...
January 9, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28087767/trial-by-trial-motor-cortical-correlates-of-a-rapidly-adapting-visuomotor-internal-model
#15
Sergey D Stavisky, Jonathan C Kao, Stephen I Ryu, Krishna V Shenoy
: Accurate motor control is mediated by internal models of how neural activity generates movement. We examined neural correlates of an adapting internal model of visuomotor gain in motor cortex while two macaques performed a reaching task in which the gain scaling between the hand and a presented cursor was varied. Previous studies of cortical changes during visuomotor adaptation focused on preparatory and peri-movement epochs and analyzed trial-averaged neural data. Here, we recorded simultaneous neural population activity using multielectrode arrays and focused our analysis on neural differences in the period before the target appeared...
January 13, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28087211/the-effect-of-bone-growth-onto-massive-prostheses-collars-in-protecting-the-implant-from-fracture
#16
Paul Fromme, Gordon W Blunn, William J Aston, Tasneem Abdoola, Jacob Koris, Melanie J Coathup
Limb-sparing distal femoral endoprotheses used in cancer patients have a high risk of aseptic loosening. It had been reported that young adolescent patients have a higher rate of loosening and fatigue fracture of intramedullary stems because the implant becomes undersized as patients grow. Extracortical bone growth into the grooved hydroxyapatite-coated collar had been shown to reduce failure rates. The stresses in the implant and femur have been calculated from Finite Element models for different stages of bone growth onto the collar...
January 10, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28079030/neuromusculoskeletal-model-self-calibration-for-on-line-sequential-bayesian-moment-estimation
#17
Diana Ruiz Bueno, Luis Montano
OBJECTIVE: Neuromusculoskeletal models involve many subject-specific physiological parameters that need to be adjusted to adequately represent muscle properties. Traditionally, neuromusculoskeletal models have been calibrated with a forward-inverse dynamic optimization which is time-consuming and unfeasible for rehabilitation therapy. Non self-calibration algorithms have been applied to these models. To the best of our knowledge, the algorithm proposed in this work is the first on-line calibration algorithm for muscle models that allows a generic model to be adjusted to different subjects in a few steps...
January 12, 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/28077510/mitral-implant-of-the-inovare-transcatheter-heart-valve-in-failed-surgical-bioprostheses-a-novel-alternative-for-valve-in-valve-procedures
#18
Diego Felipe Gaia, Ademir Massarico Braz, Matheus Simonato, Danny Dvir, João Roberto Breda, Gustavo Calado Ribeiro, Carolina Baeta Ferreira, José Augusto Marcondes Souza, Enio Buffolo, José Honório Palma
OBJECTIVES: Reoperative procedure for the treatment of a failed mitral bioprosthesis is associated with considerable risk. In some cases, mortality is high and might contraindicate the benefit of the procedure. The minimally invasive valve-in-valve (ViV) transcatheter mitral valve implant offers an alternative less-invasive approach, reducing morbidity and mortality. The objective of this paper was to evaluate the mitral ViV approach using the Braile Inovare prosthesis. METHODS: The transcatheter balloon-expandable Braile Inovare prosthesis was used in 12 cases...
January 10, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/28076293/electromyographic-classification-of-effort-in-muscle-strength-assessment
#19
Karan Veer, Tanu Sharma
Dual-channel evaluation of surface electromyogram (SEMG) signals acquired from amputee subjects using computational techniques for classification of arm motions is presented in this study. SEMG signals were classified by the neural network (NN) and interpretation was done using statistical techniques to extract the effectiveness of the recorded signals. From the results, it was observed that there exists a calculative difference in amplitude gain across different motions and that SEMG signals have great potential to classify arm motions...
January 11, 2017: Biomedizinische Technik. Biomedical Engineering
https://www.readbyqxmd.com/read/28073636/prognosis-of-double-crown-retained-removable-dental-prostheses-compared-with-clasp-retained-removable-dental-prostheses-a-retrospective-study
#20
Keita Ishida, Toshifumi Nogawa, Yoshiyuki Takayama, Masayasu Saito, Atsuro Yokoyama
PURPOSE: The present study compared the clinical prognosis of double crown-retained removable dental prostheses (D-DRPs) with that of clasp-retained removable dental prostheses (C-RDPs). METHODS: Clinical records of 201 patients who had received 52 D-RDPs with 144 abutment teeth (D-teeth) and 199 C-RDPs with 399 abutment teeth (C-teeth) at the Prosthetic Dentistry Clinic in Hokkaido University Hospital between April 2005 and June 2015 were analyzed. Survival and complication probabilities of the two types of prostheses and abutment teeth were evaluated using the Kaplan-Meier method and compared using the log-rank test...
January 7, 2017: Journal of Prosthodontic Research
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