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https://www.readbyqxmd.com/read/29298708/case-study-of-a-user-driven-prosthetic-arm-design-bionic-hand-versus-customized-body-powered-technology-in-a-highly-demanding-work-environment
#1
Wolf Schweitzer, Michael J Thali, David Egger
BACKGROUND: Prosthetic arm research predominantly focuses on "bionic" but not body-powered arms. However, any research orientation along user needs requires sufficiently precise workplace specifications and sufficiently hard testing. Forensic medicine is a demanding environment, also physically, also for non-disabled people, on several dimensions (e.g., distances, weights, size, temperature, time). METHODS: As unilateral below elbow amputee user, the first author is in a unique position to provide direct comparison of a "bionic" myoelectric iLimb Revolution (Touch Bionics) and a customized body-powered arm which contains a number of new developments initiated or developed by the user: (1) quick lock steel wrist unit; (2) cable mount modification; (3) cast shape modeled shoulder anchor; (4) suspension with a soft double layer liner (Ohio Willowwood) and tube gauze (Molnlycke) combination...
January 3, 2018: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/29261703/transhumeral-loading-during-advanced-upper-extremity-activities-of-daily-living
#2
Alex J Drew, Morgan T Izykowski, Kent N Bachus, Heath B Henninger, K Bo Foreman
Percutaneous osseointegrated (OI) implants for direct skeletal attachment of upper extremity prosthetics represent an alternative to traditional socket suspension that may yield improved patient function and satisfaction. This is especially true in high-level, transhumeral amputees where prosthetic fitting is challenging and abandonment rates remain high. However, maintaining mechanical integrity of the bone-implant interface is crucial for safe clinical introduction of this technology. The collection of population data on the transhumeral loading environment will aid in the design of compliance and overload protection devices that mitigate the risk of periprosthetic fracture...
2017: PloS One
https://www.readbyqxmd.com/read/29224991/femoral-component-axial-rotation-in-the-gap-balancing-approach-to-total-knee-arthroplasty-measurement-by-computed-tomography
#3
André Y Aihara, Fabiano N Cardoso, Pedro Debiex, Antonio M Castro, Marcus V M Luzo, Artur R C Fernandes
BACKGROUND: Rotational malalignment of total knee arthroplasty (TKA) is a potential cause for revision surgery; therefore, it is important to have valid criteria for evaluation of normal component rotational alignment. Because computed tomography (CT) is considered the most accurate method to assess the rotational alignment of prosthetic components, the objectives in this study were define the femoral component (FC) rotation by measuring the posterior condylar angle (PCA) and the condylar twist angle (CTA) in a patient population that underwent gap-balancing TKA; determine the reliability of the FC rotation by using these measurements; evaluate the inter-relationship between the PCA and CTA; and finally evaluate the frequency and agreement in identification of the medial epicondyle sulcus (MES)...
December 7, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/29208799/an-alternative-approach-for-space-opening-in-a-bilateral-maxillary-lateral-incisor-agenesis-patient-using-miniplates
#4
Gladistone C Meros, Aline Shoji, Selly Suzuki, Luiz R Paranhos, Rodrigo Manfroi, Jonathas Claus, Aguinaldo Garcez
AIM: This case report aimed to present an orthodontic mechanic alternative for space opening in a patient missing maxillary lateral incisors, using miniplates as anchorage, associated with self-ligating brackets. BACKGROUND: Dental agenesis affects the population causing esthetic and functional damages. The prevalence of missing maxillary lateral incisors should be considered for its significant rate and negative impact on smile esthetics. CASE REPORT: This treatment was chosen based on the presence of balanced facial pattern, large canine anatomy, the need to improve dental occlusion to prevent further wear, and patient's esthetic complaint...
December 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/29204502/preoperative-radiographic-valgus-alignment-predicts-the-extent-of-lateral-soft-tissue-release-and-need-for-constraint-in-valgus-total-knee-arthroplasty
#5
Oren Goltzer, Tommy P Mroz, M'hamed Temkit, Henry D Clarke, Mark J Spangehl
Background: In total knee arthroplasty (TKA) for valgus knees, the decision to use a constrained implant is often made intraoperatively depending on the extent of soft tissue releases performed and residual soft tissue imbalance. The purpose of this study is to determine if preoperative radiographic criteria of valgus knees can predict the extent of soft tissue releases required and the level of constraint needed to balance the knee during TKA. Methods: A single surgeon's 807 consecutive TKA standing hip-knee-ankle radiographs from 2007-2012 were analyzed...
December 2017: Arthroplasty Today
https://www.readbyqxmd.com/read/29194103/concerns-of-anophthalmic-patients-wearing-cryolite-glass-prosthetic-eyes
#6
Alexander C Rokohl, Konrad R Koch, Marc Trester, Wolfgang Trester, Keith R Pine, Ludwig M Heindl
PURPOSE: To identify the main concerns of patients experienced in wearing cryolite glass prosthetic eyes and to investigate how these have changed over time. METHODS: One hundred six patients experienced in wearing prosthetic eyes for at least 2 years were asked to complete an anonymous questionnaire regarding prosthetic eye concerns at the time of initial eye loss and at the present time. Main outcome measures included changes in levels of concern over time. RESULTS: Initially, the participants were mainly concerned about their appearance, health of the fellow eye, and coping with monocularity...
November 15, 2017: Ophthalmic Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29184493/step-to-step-ankle-inversion-eversion-torque-modulation-can-reduce-effort-associated-with-balance
#7
Myunghee Kim, Steven H Collins
Below-knee amputation is associated with higher energy expenditure during walking, partially due to difficulty maintaining balance. We previously found that once-per-step push-off work control can reduce balance-related effort, both in simulation and in experiments with human participants. Simulations also suggested that changing ankle inversion/eversion torque on each step, in response to changes in body state, could assist with balance. In this study, we investigated the effects of ankle inversion/eversion torque modulation on balance-related effort among amputees (N = 5) using a multi-actuated ankle-foot prosthesis emulator...
2017: Frontiers in Neurorobotics
https://www.readbyqxmd.com/read/29126375/a-clinical-survey-about-commercial-games-in-lower-limb-prosthetic-rehabilitation
#8
Bita Imam, William C Miller, Heather C Finlayson, Janice J Eng, Tal Jarus
BACKGROUND: Despite the popularity of commercial games in lower limb prosthetic rehabilitation, data about their prevalence of use as well as therapists' perspectives about these games are still lacking. OBJECTIVES: To learn about the prevalence of use of commercial games in lower limb prosthetic rehabilitation and therapists' perspectives about these games. STUDY DESIGN: Cross-sectional. METHODS: An online survey was sent to physical and occupational therapists across prosthetic rehabilitation facilities in Canada...
November 1, 2017: Prosthetics and Orthotics International
https://www.readbyqxmd.com/read/29119728/a-framework-for-designing-patient-specific-bioprosthetic-heart-valves-using-immersogeometric-fluid-structure-interaction-analysis
#9
Fei Xu, Simone Morganti, Rana Zakerzadeh, David Kamensky, Ferdinando Auricchio, Alessandro Reali, Thomas J R Hughes, Michael S Sacks, Ming-Chen Hsu
Numerous studies have suggested that medical image derived computational mechanics models could be developed to reduce mortality and morbidity due to cardiovascular diseases by allowing for patient-specific surgical planning and customized medical device design. In this work, we present a novel framework for designing prosthetic heart valves using a parametric design platform and immersogeometric fluid-structure interaction (FSI) analysis. We parameterize the leaflet geometry using several key design parameters...
November 9, 2017: International Journal for Numerical Methods in Biomedical Engineering
https://www.readbyqxmd.com/read/29118202/bayesian-optimal-adaptation-explains-age-related-human-sensorimotor-changes
#10
Faisal Karmali, Gregory T Whitman, Richard F Lewis
The brain uses information from different sensory systems to guide motor behavior, and aging is associated with a simultaneous decline in the quality of sensory information provided to the brain and a deterioration in motor control. Correlations between age-dependent decline in sensory anatomical structures and behavior have been demonstrated, and it has recently been suggested that a Bayesian framework could explain these relationships. Here we show that age-dependent changes in a human sensorimotor reflex, the vestibulo-ocular reflex, are explained by a Bayesian optimal adaptation in the brain occurring in response to death of motion-sensing hair cells...
November 8, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/29114332/molar-uprighting-a-considerable-and-safe-decision-to-avoid-prosthetic-treatment
#11
Taísa Boamorte Raveli, Dirceu Barnabé Raveli, Kelei Cristina de Mathias Almeida, Ary Dos Santos Pinto
Background: Tipped lower molar over edentulous space is very common in orthodontics practice when adults seek treatment. The segmented arch technique features a predictable force system that provides a controlled release of force that can produce light and continuous tooth movement. Case Description: A female adult patient, who lost a permanent lower first molar, needed correction of the position of her permanent first molar place. Instead of making space for rehabilitation, it was closed after second molar uprighting and a balanced interdigitation was created without prosthetics...
2017: Open Dentistry Journal
https://www.readbyqxmd.com/read/29083348/cementless-knee-arthroplasty
#12
Lorenzo Ponziani, Francesco Di Caprio, Renato Meringolo
Total knee replacement is a common treatment for advanced knee osteoarthritis. The most common and widespread method is cemented arthroplasty. As in the prosthetic hip a gradual transition from cemented to uncemented fixation techniques occurred over time, increasing interest is growing also around cementless knee fixation, with the theoretical advantages of preserving the bone stock and obtaining a biological fixation avoiding cement fragmentation. On the basis of the actual knowledge, the uncemented knee prosthesis represents an interesting alternative especially for the patient under 65 years of age, with viable bone quality, in which a biological bone-prosthesis fixation is desirable, while avoiding the drawbacks of cement fragmentation and of the possible future revision of a cemented implant...
October 18, 2017: Acta Bio-medica: Atenei Parmensis
https://www.readbyqxmd.com/read/29064920/what-s-new-in-acellular-dermal-matrix-and-soft-tissue-support-for-prosthetic-breast-reconstruction
#13
REVIEW
John Y S Kim, Alexei S Mlodinow
Of the nearly 90,000 implant-based breast reconstructions performed in the United States, the majority use internal soft-tissue support. Aesthetically, these constructs may allow for better positioning of prosthesis, improve lower pole expansion, and increase projection. They may have particular utility in direct-to-implant, nipple-sparing mastectomies, and prepectoral reconstructions. In recent years, new permutations of acellular dermal matrices have evolved with diverse shapes, sizes, form-factor innovations, and processing characteristics...
November 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29062019/myoelectric-pattern-recognition-outperforms-direct-control-for-transhumeral-amputees-with-targeted-muscle-reinnervation-a-randomized-clinical-trial
#14
Levi J Hargrove, Laura A Miller, Kristi Turner, Todd A Kuiken
Recently commercialized powered prosthetic arm systems hold great potential in restoring function for people with upper-limb loss. However, effective use of such devices remains limited by conventional (direct) control methods, which rely on electromyographic signals produced from a limited set of muscles. Targeted Muscle Reinnervation (TMR) is a nerve transfer procedure that creates additional recording sites for myoelectric prosthesis control. The effects of TMR may be enhanced when paired with pattern recognition technology...
October 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29045310/risk-of-stroke-after-transcatheter-prosthetic-aortic-valve-implant-with-aortic-bioprosthesis-subclinical-thrombosis-and-possible-therapeutic-implications
#15
Giuseppe Di Pasquale, Gloria V Coutsoumbas, Silvia Zagnoni
: Many factors could increase the risk of stroke after transcatheter prosthetic aortic valve implant, mainly related to the procedure itself, or to the type of valvular prosthesis, or to the presence of atrial fibrillation. There is a wide variability in the antithrombotic treatment utilized in clinical practice, as far as the choice of drugs (anticoagulant, single or dual antiplatelet treatment), and its optimal duration. The most popular therapeutic strategy, also recommended by the Scientific Societies, is dual antiplatelet (aspirin and clopidogrel) for the first 3-6 months then switching to single antiplatelet (usually aspirin), limiting oral anticoagulant therapy only to those patients with other primary indication to the treatment...
October 16, 2017: Journal of Cardiovascular Medicine
https://www.readbyqxmd.com/read/28975421/maxillary-zygomatic-hexagonal-implant-system-mzh-system-for-severe-resorption-a-new-technique
#16
Muñoz Ruben, Golaszewski Jose, Diaz Alvaro, Speranza Grace
INTRODUCTION: The biomechanical demands of the severely resorbed maxilla have prompted the search for alternative points of anchorage for zygomatic implants that allows stabilizing a prosthesis in young patients (30 years old or more) for restitution of function and form. The purpose of this study is to describe the protocol of zygomatic hexagonal implants in patients with severe maxillary bone resorption. MATERIALS AND METHODS: Ten patients with severe maxillary resorption were treated with hexagonal implants system, they were evaluated at the preoperative and the postoperative periods for a minimal of 24 months, and the evaluation was clinical and trough conventional radiographs and CT scans...
December 2017: Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28974119/frontal-plane-pelvis-and-hip-kinematics-of-transfemoral-amputee-gait-effect-of-a-prosthetic-foot-with-active-ankle-dorsiflexion-and-individualized-training-a-case-study
#17
Anna Armannsdottir, Roy Tranberg, Gudfinna Halldorsdottir, Kristin Briem
Following a transfemoral amputation (TFA), numerous changes in movement patterns during gait can occur. Frontal plane hip and pelvis compensatory strategies are recognized among individuals with a TFA, some thought to aid in safe foot clearance during the swing phase of gait. The aim of this case study was to evaluate the effect of an active ankle dorsiflexion provided by a microprocessor-controlled prosthetic foot, as well as the effect of individualized training on these parameters. In this case study, a 42-year-old male underwent 3 D gait analysis...
October 3, 2017: Disability and Rehabilitation. Assistive Technology
https://www.readbyqxmd.com/read/28946723/selection-of-implants-in-unilateral-prosthetic-breast-reconstruction-and-contralateral-augmentation
#18
Soo Jung Kim, Seung Yong Song, Dae Hyun Lew, Dong Won Lee
BACKGROUND: In breast reconstruction using implants after unilateral mastectomy, it is challenging to create a natural, ptotic contour, and asymmetry is a potential drawback. To achieve breast symmetry and an ideal shape for both breasts, we performed contralateral augmentation in patients undergoing breast reconstruction with implants. METHODS: Patients underwent unilateral mastectomy and 2-stage reconstruction. During the second stage of the procedure, contralateral augmentation mammoplasty was performed...
September 2017: Archives of Plastic Surgery
https://www.readbyqxmd.com/read/28937598/the-effect-of-rankl-opg-balance-on-reducing-implant-complications
#19
REVIEW
Elizabeth R Kapasa, Peter V Giannoudis, Xiaodong Jia, Paul V Hatton, Xuebin B Yang
Despite the phenomenal success of implants particularly in the realms of dentistry and orthopaedics, there are still challenges to overcome. The failure of implants resulting from infection, prosthetic loosening, and non-union continue to be the most notorious examples. The cascade of fracture healing and bone repair, especially with the presence of an implant, is complex because it involves a multifaceted immune response alongside the intricate process of bone formation and remodelling. Bone loss is a serious clinical problem that is frequently accompanied by chronic inflammation, illustrating that there is a convoluted relationship between inflammation and bone erosion...
September 22, 2017: Journal of Functional Biomaterials
https://www.readbyqxmd.com/read/28932311/differences-between-subjective-balanced-occlusion-and-measurements-reported-with-t-scan-iii
#20
Zana Lila-Krasniqi, Kujtim Shala, Teuta Pustina Krasniqi, Teuta Bicaj, Enis Ahmedi, Linda Dula, Arlinda Tmava Dragusha, Ljuben Guguvcevski
BACKGROUND: The aetiology of Temporomandibular disorder is multifactorial, and numerous studies have addressed that occlusion may be of great importance in the pathogenesis of Temporomandibular disorder. AIM: The aim of this study is to determine if any direct relationship exists between balanced occlusion and Temporomandibular disorder and to evaluate the differences between subjective balanced occlusion and measurements reported with T-scan III electronic system...
August 15, 2017: Open Access Macedonian Journal of Medical Sciences
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