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https://www.readbyqxmd.com/read/28650804/limb-position-tolerant-pattern-recognition-for-myoelectric-prosthesis-control-with-adaptive-sparse-representations-from-extreme-learning
#1
Joseph L Betthauser, Christopher L Hunt, Luke E Osborn, Matthew R Masters, Gyorgy Levay, Rahul Reddy Kaliki, Nitish V Thakor
Myoelectric signals can be used to predict the intended movements of an amputee for prosthesis control. However, untrained effects like limb position changes influence myoelectric signal characteristics, hindering the ability of pattern recognition algorithms to discriminate among motion classes. Despite frequent and long training sessions, these deleterious conditional influences may result in poor performance and device abandonment. GOAL: We present a robust sparsity-based adaptive classification method that is significantly less sensitive to signal deviations resulting from untrained conditions...
June 23, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28650802/translational-motion-tracking-of-leg-joints-for-enhanced-prediction-of-walking-tasks
#2
Roman Mark Stolyarov, Gary Burnett, Hugh Herr
OBJECTIVE: Prediction of walking tasks in powered leg prostheses is an important problem in the development of biomimetic prosthesis controllers. This article proposes a novel method to predict upcoming walking tasks by estimating the translational motion of leg joints using an inertial measurement unit. METHODS: We asked six subjects with unilateral transtibial amputations to traverse flat ground, ramps, and stairs using a powered prosthesis while inertial signals were remotely collected...
June 22, 2017: IEEE Transactions on Bio-medical Engineering
https://www.readbyqxmd.com/read/28650517/adaptive-change-in-chewing-related-brain-activity-while-wearing-a-palatal-plate-an-fmri-study
#3
Yuka Inamochi, Kenji Fueki, Nobuo Usui, Masato Taira, Noriyuki Wakabayashi
Prosthodontic treatment success depends on patients' ability to adapt to an altered oral environment containing removable prostheses. We investigated adaptive chewing-related brain activity changes in response to a new oral environment. Twenty-eight fully dentate subjects (mean age: 28.6 years) wore experimental denture-base palatal plates (3-mm thick), for 7 days. We measured food mixing ability and cycle time, and assessed brain activity by functional magnetic resonance imaging during chewing at pre-insertion (Day 0), and immediately (Day 1), 3 days (Day 3), and 7 days (Day 7) after insertion...
June 26, 2017: Journal of Oral Rehabilitation
https://www.readbyqxmd.com/read/28649911/three-dimensional-printed-upper-limb-prostheses-lack-randomised-controlled-trials-a-systematic-review
#4
Laura E Diment, Mark S Thompson, Jeroen Hm Bergmann
BACKGROUND: Three-dimensional printing provides an exciting opportunity to customise upper-limb prostheses. OBJECTIVE: This review summarises the research that assesses the efficacy and effectiveness of three-dimensional printed upper-limb prostheses. STUDY DESIGN: Systematic review. METHODS: PubMed, Web of Science and OVID were systematically searched for studies that reported human trials of three-dimensional printed upper-limb prostheses...
June 1, 2017: Prosthetics and Orthotics International
https://www.readbyqxmd.com/read/28648958/use-of-a-three-dimensional-custom-made-porous-titanium-prosthesis-for-mandibular-body-reconstruction
#5
Q Qassemyar, N Assouly, S Temam, F Kolb
The progress made in recent years in the field of head and neck bone reconstruction is directly related to technological advancements made in computer-aided design and manufacturing (CAD/CAM) and three-dimensional printing in particular. Today these technologies are mainly used in mandibular reconstruction to manufacture aids for harvesting and shaping bone flaps. However problems remain when addressing patients with a contraindication to microsurgery who need extensive bone reconstruction. For these patients who cannot benefit from vascularized bone grafts, surgeons have to find alternative solutions aimed at maintaining best function and aesthetics...
June 22, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28648720/an-engineered-home-environment-for-untethered-data-telemetry-from-nonhuman-primates
#6
Marc P Powell, William R Britz, James S Harper Iii, David A Borton
BACKGROUND: Wireless neural recording technologies now provide untethered access to large populations of neurons in the nonhuman primate brain. Such technologies enable long-term, continuous interrogation of neural circuits and importantly open the door for chronic neurorehabilitation platforms. For example, by providing continuous consistent closed loop feedback from a brain machine interface, the nervous system can leverage plasticity to integrate more effectively into the system than would be possible in short experimental sessions...
June 22, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28647466/incidence-indications-and-predicting-factors-of-permanent-pacemaker-implantation-after-transcatheter-aortic-valve-implantation-a-retrospective-study
#7
Mathieu Becker, Hugues Blangy, Thierry Folliguet, Thibault Villemin, Luc Freysz, Amandine Luc, Pablo Maureira, Batric Popovic, Arnaud Olivier, Nicolas Sadoul
BACKGROUND: As the number of transcatheter aortic valve implantation (TAVI) procedures is constantly increasing, it is important to consider common complications, such as pacemaker (PM) implantation, and their specific risk factors. AIMS: Echocardiographic, computed tomography and electrocardiographic data were analysed to determine the predicting factors, if any, associated with PM implantation. METHODS: This retrospective study included patients referred to Nancy University Hospital for a TAVI procedure from January 2013 to December 2015...
June 21, 2017: Archives of Cardiovascular Diseases
https://www.readbyqxmd.com/read/28647157/veneered-zirconia-inlay-retained-fixed-dental-prostheses-10-year-results-from-a-prospective-clinical-study
#8
Friederike Rathmann, Wolfgang Bömicke, Peter Rammelsberg, Brigitte Ohlmann
OBJECTIVE: The purpose of this study was to evaluate the 10-year clinical performance of zirconia-based inlay-retained fixed dental prostheses (IRFDP). METHODS: For replacement of a molar in 27 patients, 30 IRFDP were luted by use of different cements, Panavia F (Kuraray Europe GmbH) or Multilink Automix (Ivoclar Vivadent GmbH), with use of inlay/inlay, inlay/full-crown, or inlay/partial-crown retainers for anchorage. Frameworks were milled from yttria-stabilized zirconia (IPS e...
June 21, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28647139/impact-of-raised-serum-cobalt-levels-from-recalled-articular-surface-replacement-hip-prostheses-on-the-visual-pathway
#9
Timothy Unsworth-Smith, Jane C Khan, Riaz J K Khan, Enid Chelva, Caroline Ann Lim, Samantha Haebich, Michelle L Trevenen
BACKGROUND: The articular surface replacement (ASR) was recalled in 2010 because of higher than expected revision rates. Patients reported symptoms of neurologic dysfunction including poor vision. This cohort study, using objective measurements, aimed to establish whether a higher incidence of visual function defects exists in ASR patients. METHODS: Thirty-three ASR patients and 33 non-ASR controls (control 1) were recruited. Data were compared with normative population data from the visual electrophysiology database (control 2)...
May 11, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28645669/multidisciplinary-approach-to-oral-rehabilitation-with-dental-implants-after-gunshot-injury-a-clinical-report
#10
Lélis Gustavo Nícoli, Suzane Cristina Pigossi, Raphael Ferreira de Souza Bezerra Araújo, Cláudio Marcantonio, Élcio Marcantonio, Élcio Marcantonio
This clinical report describes a multidisciplinary approach to treat a patient with edentulism and a severe anatomic defect in the mandible caused by a gunshot injury by using an implant-fixed complete dental prosthesis. An immediate loading interim implant-fixed complete dental prosthesis in the mandible associated with a maxillary removable complete denture prosthesis was initially provided to restore the intermaxillary relation. Nasal floor elevation and maxillary sinus augmentation were subsequently performed to increase the maxillary bone volume...
June 20, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28645662/development-of-a-3d-printable-maxillofacial-silicone-part-ii-optimization-of-moderator-and-thixotropic-agent
#11
Swati K Jindal, Martyn Sherriff, Mark G Waters, James E Smay, Trevor J Coward
STATEMENT OF PROBLEM: Conventionally, maxillofacial prostheses are fabricated by hand carving the missing anatomic defect in wax and creating a mold into which pigmented silicone elastomer is placed. Digital technologies such as computer numerical control milling and 3-dimensional (3D) printing have been used to prepare molds, directly or indirectly, into which a biocompatible pigmented silicone elastomer can be placed. PURPOSE: The purpose of this in vitro study was to develop a silicone elastomer that could be 3D printed directly without a mold to create facial or body prostheses by varying its composition...
June 20, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28642437/human-in-the-loop-optimization-of-exoskeleton-assistance-during-walking
#12
Juanjuan Zhang, Pieter Fiers, Kirby A Witte, Rachel W Jackson, Katherine L Poggensee, Christopher G Atkeson, Steven H Collins
Exoskeletons and active prostheses promise to enhance human mobility, but few have succeeded. Optimizing device characteristics on the basis of measured human performance could lead to improved designs. We have developed a method for identifying the exoskeleton assistance that minimizes human energy cost during walking. Optimized torque patterns from an exoskeleton worn on one ankle reduced metabolic energy consumption by 24.2 ± 7.4% compared to no torque. The approach was effective with exoskeletons worn on one or both ankles, during a variety of walking conditions, during running, and when optimizing muscle activity...
June 23, 2017: Science
https://www.readbyqxmd.com/read/28641822/interim-rehabilitation-of-occlusal-vertical-dimension-using-a-double-crown-retained-removable-dental-prosthesis-with-polyetheretherketone-framework
#13
Sebastian Hahnel, Christian Scherl, Martin Rosentritt
Polyetheretherketone (PEEK) is a polymeric material that has recently been introduced in dentistry and can be used as framework material for fixed and removable dental prostheses. This clinical report describes the fabrication of a double-crown-retained prosthesis with a PEEK framework in a patient with a substantially diminished occlusal vertical dimension. The insertion of the removable dental prosthesis with a PEEK framework resulted in the functional and esthetic rehabilitation of the patient; however, removable dental prostheses fabricated from PEEK should currently be regarded as interim restorations because of the limited available scientific evidence...
June 20, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28641476/direct-medical-costs-of-accidental-falls-for-adults-with-transfemoral-amputations
#14
Benjamin Mundell, Hilal Maradit Kremers, Sue Visscher, Kurtis Hoppe, Kenton Kaufman
BACKGROUND: Active individuals with transfemoral amputations are provided a microprocessor-controlled knee with the belief that the prosthesis reduces their risk of falling. However, these prostheses are expensive and the cost-effectiveness is unknown with regard to falls in the transfemoral amputation population. The direct medical costs of falls in adults with transfemoral amputations need to be determined in order to assess the incremental costs and benefits of microprocessor-controlled prosthetic knees...
June 1, 2017: Prosthetics and Orthotics International
https://www.readbyqxmd.com/read/28640439/skin-inspired-multifunctional-autonomic-intrinsic-conductive-self-healing-hydrogels-with-pressure-sensitivity-stretchability-and-3d-printability
#15
Mohammad Ali Darabi, Ali Khosrozadeh, Rene Mbeleck, Yuqing Liu, Qiang Chang, Junzi Jiang, Jun Cai, Quan Wang, Gaoxing Luo, Malcolm Xing
The advent of conductive self-healing (CSH) hydrogels, a class of novel materials mimicking human skin, may change the trajectory of the industrial process because of their potential applications in soft robots, biomimetic prostheses, and health-monitoring systems. Here, the development of a mechanically and electrically self-healing hydrogel based on physically and chemically cross-linked networks is reported. The autonomous intrinsic self-healing of the hydrogel is attained through dynamic ionic interactions between carboxylic groups of poly(acrylic acid) and ferric ions...
June 22, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28640329/association-of-adverse-oral-health-outcomes-with-socioeconomic-inequalities-and-dental-needs-in-brazilian-adolescents
#16
Daniela de Rossi Figueiredo, João Luiz Bastos, Karen Glazer Peres
This study aimed to explore the relations between adverse oral outcomes and socioeconomic, demographic, and self-rated oral health variables and to describe their distribution. Principal component analysis was conducted on data from adolescents in the Brazilian National Oral Health Survey (N = 5,445). Higher loadings were found for crowding (0.6), maxillary and mandibular irregularities (0.5), and count of communitary periodontal index (CPI) sextants with bleeding and dental calculus (0.5). The mean rates for periodontal and occlusal disorders were at least two times higher in adolescents from lower income families and those reporting the need for dental prostheses, as well as those dissatisfied with their dental and overall oral health...
June 5, 2017: Cadernos de Saúde Pública
https://www.readbyqxmd.com/read/28639846/antibiotic-prophylaxis-is-not-indicated-prior-to-dental-procedures-for-prevention-of-periprosthetic-joint-infections
#17
Willem M H Rademacher, Geert H I M Walenkamp, Dirk Jan F Moojen, Johannes G E Hendriks, Theo A Goedendorp, Frederik R Rozema
Background and purpose - To minimize the risk of hematogenous periprosthetic joint infection (HPJI), international and Dutch guidelines recommended antibiotic prophylaxis prior to dental procedures. Unclear definitions and contradictory recommendations in these guidelines have led to unnecessary antibiotic prescriptions. To formulate new guidelines, a joint committee of the Dutch Orthopaedic and Dental Societies conducted a systematic literature review to answer the following question: can antibiotic prophylaxis be recommended for patients (with joint prostheses) undergoing dental procedures in order to prevent dental HPJI? Methods - The Medline, Embase, and Cochrane databases were searched for randomized controlled trials (RCTs), reviews, and observational studies up to July 2015...
June 22, 2017: Acta Orthopaedica
https://www.readbyqxmd.com/read/28639517/development-of-finite-element-model-for-customized-prostheses-design-for-patient-with-pelvic-bone-tumor
#18
Taimoor Iqbal, Lei Shi, Ling Wang, Yaxiong Liu, Dichen Li, Mian Qin, Zhongmin Jin
The aim of this study was to design a hemi-pelvic prosthesis for a patient affected by pelvic sarcoma. To investigate the biomechanical functionality of the pelvis reconstructed with designed custom-made prosthesis, a patient-specific finite element model of whole pelvis with primary ligaments inclusive was constructed based on the computed tomography images of the patient. Then, a finite element analysis was performed to calculate and compare the stress distribution between the normal and implanted pelvis models when undergoing three different static conditions-both-leg standing, single-leg standing for the healthy and the affected one...
June 2017: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/28639474/custom-rapid-prototype-thumb-prosthesis-for-partial-hand-amputation-a-case-report
#19
Ashley Quinn Swartz, Kristi Turner, Laura Miller, Todd Kuiken
BACKGROUND: Due to advancements in three-dimensional printing, custom-made prostheses are becoming more viable options for persons with difficult cases of prosthetic management. The purpose of this article was to develop a custom voluntary-closing, body-powered thumb mechanism for a partial-hand amputee who had amputations of the index finger and thumb on the left, non-dominant hand. Case description and methods: The prosthesis model was manufactured using rapid prototype technology and was developed to provide greater force and functionality, and to decrease overall size compared to traditional hand prostheses...
June 1, 2017: Prosthetics and Orthotics International
https://www.readbyqxmd.com/read/28636059/clinical-outcome-and-complications-of-thoracic-and-pelvic-limb-stump-and-socket-prostheses
#20
Andrew Phillips, Elvin Kulendra, Edith Bishop, Michelle Monk, Kevin Parsons, Arthur House
OBJECTIVES: To describe the use, quality of life, compliance, complications, and outcome of animals fitted with stump socket prostheses. METHODS: Medical records of dogs fitted with a stump socket prosthesis were reviewed. Functional outcome, quality of life and complications were retrospectively assessed from an owner questionnaire. RESULTS: Thirteen stump socket prostheses (12 dogs) were fitted for a variety of reasons including trauma, congenital abnormalities, and neoplasia...
June 21, 2017: Veterinary and Comparative Orthopaedics and Traumatology: V.C.O.T
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