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https://www.readbyqxmd.com/read/29655819/in-vitro-study-of-a-modified-sagittal-split-osteotomy-fixation-technique-of-the-mandible-a-mechanical-test
#1
C L Sonego, M A R Scheffer, O L Chagas Júnior, B M Vetromilla, L P Fernandes, A Ozkomur, A N Silva Júnior, S A Q Miguens Júnior, P A G Hernandez
This study was performed to evaluate the compressive mechanical strength of rigid internal fixation (RIF) using 1.5-mm L-shaped plates fixed with monocortical screws in sagittal split osteotomy (SSO). Thirty synthetic hemimandibles, which had all undergone a 5-mm advancement, were divided into three groups: three 12-mm bicortical titanium screws were placed in an inverted L pattern in group A; one straight 2.0-mm system spaced titanium plate fixed with four 5-mm monocortical screws was used in group B; two 1...
April 11, 2018: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29653157/do-depressive-symptoms-affect-balance-in-older-adults-with-mild-cognitive-impairment-results-from-the-gait-and-brain-study
#2
Frederico Pieruccini-Faria, Susan W Muir-Hunter, Manuel Montero-Odasso
BACKGROUND: Mild cognitive impairment (MCI) and depression independently affect balance control in older adults. However, it is uncertain whether depressive symptoms would amplify balance problems in older adults with MCI. AIM: To evaluate if the presence of significant depressive symptoms affects postural sway under somatosensory challenges in a MCI population. METHODS: Eighty two participants (mean of 75.3 ± 6.4 years of age; 46% women) with MCI completed cognitive and balance assessments...
April 10, 2018: Experimental Gerontology
https://www.readbyqxmd.com/read/29643592/does-trampoline-or-hard-surface-jumping-influence-lower-extremity-alignment
#3
Kiyokazu Akasaka, Akihiro Tamura, Aoi Katsuta, Ayako Sagawa, Takahiro Otsudo, Yu Okubo, Yutaka Sawada, Toby Hall
[Purpose] To determine whether repetitive trampoline or hard surface jumping affects lower extremity alignment on jump landing. [Subjects and Methods] Twenty healthy females participated in this study. All subjects performed a drop vertical jump before and after repeated maximum effort trampoline or hard surface jumping. A three-dimensional motion analysis system and two force plates were used to record lower extremity angles, moments, and vertical ground reaction force during drop vertical jumps. [Results] Knee extensor moment after trampoline jumping was greater than that after hard surface jumping...
December 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/29630005/an-exploration-of-equine-assisted-therapy-to-improve-balance-functional-capacity-and-cognition-in-older-adults-with-alzheimer-disease
#4
Thais Borges de Araujo, Wagner Rodrigues Martins, Marco Polo Freitas, Einstein Camargos, Jéssica Mota, Marisete Peralta Safons
BACKGROUND AND PURPOSE: Alzheimer disease (AD) is a chronic, progressive dementia syndrome that features cognitive and behavioral symptoms, as well as physical and functional limitations that develop over the course of the disease. As an activity that involves physical and cognitive aspects, equine-assisted therapy (EAT) could be a useful therapeutic approach in conditions that involve physical and cognitive decline. However, to date, there are no reports of the use of this therapy in participants with AD...
April 6, 2018: Journal of Geriatric Physical Therapy
https://www.readbyqxmd.com/read/29629019/basins-of-attraction-in-human-balance
#5
Victoria A Smith, Thurmon E Lockhart, Mark L Spano
Falls are a recognized risk factor for unintentional injuries among older adults, accounting for a large proportion of fractures, emergency department visits, and urgent hospitalizations. Human balance and gait research traditionally uses linear or qualitative tests to assess and describe human motion; however, human motion is neither a simple nor a linear process. The objective of this research is to identify and to learn more about what factors affect balance using nonlinear dynamical techniques, such as basin boundaries...
December 2017: European Physical Journal. Special Topics
https://www.readbyqxmd.com/read/29625190/sacroiliac-joint-dysfunction-patients-exhibit-altered-movement-strategies-when-performing-a-sit-to-stand-task
#6
Robyn A Capobianco, Daniel F Feeney, Jana R Jeffers, Erika Nelson-Wong, Joseph Morreale, Alena M Grabowski, Roger M Enoka
OF BACKGROUND DATA: The ability to rise from a chair is a basic functional task that is frequently compromised in individuals diagnosed with orthopedic disorders in the low back and hip. There is no published literature that describes how this task is altered by sacroiliac joint dysfunction (SIJD). PURPOSE: To compare lower extremity biomechanics and the onset of muscle activity when rising from a chair in individuals with SIJD and healthy persons. STUDY DESIGN: Six women with unilateral SIJD and six age-matched healthy controls performed a sit-to-stand task while we measured kinematics, kinetics, and muscle activity...
April 3, 2018: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/29623042/estimation-of-vertical-ground-reaction-forces-and-sagittal-knee-kinematics-during-running-using-three-inertial-sensors
#7
Frank J Wouda, Matteo Giuberti, Giovanni Bellusci, Erik Maartens, Jasper Reenalda, Bert-Jan F van Beijnum, Peter H Veltink
Analysis of running mechanics has traditionally been limited to a gait laboratory using either force plates or an instrumented treadmill in combination with a full-body optical motion capture system. With the introduction of inertial motion capture systems, it becomes possible to measure kinematics in any environment. However, kinetic information could not be provided with such technology. Furthermore, numerous body-worn sensors are required for a full-body motion analysis. The aim of this study is to examine the validity of a method to estimate sagittal knee joint angles and vertical ground reaction forces during running using an ambulatory minimal body-worn sensor setup...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29621425/age-related-changes-in-postural-sway-during-sit-to-stand-in-typical-children-and-children-with-cerebral-palsy
#8
Silvia Leticia Pavão, Ana Carolina de Campos, Nelci Adriana Cicuto Ferreira Rocha
OBJECTIVE: To assess age-related changes in postural sway during sit-to-stand (STS) in typical children (TC) and children with mild cerebral palsy (CP). METHODS: Thirty-five TC and 23 children with mild CP were allocated in four different age groups: 5-6, 7-9, 10-12, and 13-15 years; they all performed STS movements over a force plate. Anterior-posterior and medial-lateral amplitude of center of pressure (CoP) displacement, area and velocity of CoP sway were analyzed and compared between the age groups for TC and children with CP...
April 5, 2018: Journal of Motor Behavior
https://www.readbyqxmd.com/read/29621270/measurement-of-shear-wave-speed-dispersion-in-the-placenta-by-transient-elastography-a-preliminary-ex-vivo-study
#9
Emmanuel G Simon, Samuel Callé, Franck Perrotin, Jean-Pierre Remenieras
BACKGROUND: Placental elasticity may be modified in women with placental insufficiency. Shear wave elastography (SWE) can measure this, using acoustic radiation force, but the safety of its use in pregnant women has not yet been demonstrated. Transient elastography (TE) is a safer alternative, but has not yet been applied to the placenta. Moreover, the dispersion of shear wave speed (SWS) as a function of frequency has received relatively little study for placental tissue, although it might improve the accuracy of biomechanical assessment...
2018: PloS One
https://www.readbyqxmd.com/read/29619806/the-influence-of-single-leg-landing-direction-on-lower-limbs-biomechanics
#10
Antonio Dello Iacono, Moshe Ayalon, Weijie Wang
BACKGROUND: The purpose of this study was to investigate whether different directions of single-leg landing tasks would influence lower limbs joints biomechanics. METHODS: Using a controlled and experimental design, thirty physically active male subjects (age: 26.4 ± 4.4 years; height: 180.5 ± 3.7 cm; weight: 79.8: ± 4.4 kg), by dropping down from the top of a wooden box of 31 cm height, performed three one-leg landing tasks featured by different landing directions: frontward (FL), lateral (LL), and rotational (RL)...
April 4, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29619797/acute-neuromuscular-responses-to-short-and-long-roundhouse-kick-striking-paces-in-professional-muay-thai-fighters
#11
Giuseppe Cimadoro, Ryan Mahaffey, Nicolas Babault
BACKGROUND: Muay Thai fighters strongly rely on the use of the roundhouse kick due to its effectiveness (i.e. power) and implications on the final score. Therefore, different striking tempos at full power are used during training as a method to enhance kicking power. However, the neuromuscular responses are unknown. Thus, the goal of this study was to investigate neuromuscular responses to a single bout of shorter (every second = H1) and longer (every 3s = H3) kick striking time intervals, measured with the countermovement jump (CMJ)...
April 4, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29619306/carbon-nanofiber-versus-graphene-based-stretchable-capacitive-touch-sensors-for-artificial-electronic-skin
#12
Pietro Cataldi, Simeone Dussoni, Luca Ceseracciu, Marco Maggiali, Lorenzo Natale, Giorgio Metta, Athanassia Athanassiou, Ilker S Bayer
Stretchable capacitive devices are instrumental for new-generation multifunctional haptic technologies particularly suited for soft robotics and electronic skin applications. A majority of elongating soft electronics still rely on silicone for building devices or sensors by multiple-step replication. In this study, fabrication of a reliable elongating parallel-plate capacitive touch sensor, using nitrile rubber gloves as templates, is demonstrated. Spray coating both sides of a rubber piece cut out of a glove with a conductive polymer suspension carrying dispersed carbon nanofibers (CnFs) or graphene nanoplatelets (GnPs) is sufficient for making electrodes with low sheet resistance values (≈10 Ω sq-1 )...
February 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/29619110/comparison-of-bite-force-with-locking-plates-versus-non-locking-plates-in-the-treatment-of-mandibular-fractures-a-meta-analysis
#13
REVIEW
José Cristiano Ramos Glória, Ighor Andrade Fernandes, Esmeralda Maria da Silveira, Glaciele Maria de Souza, Ricardo Lopes Rocha, Endi Lanza Galvão, Saulo Gabriel Moreira Falci
Introduction  Mandibular fractures represent a high percentage of all facial fractures, and the bite force is a fundamental parameter to measure the actual mandibular function and, subsequently, the masticatory efficiency and quality of life. Objectives  The purpose of the present systematic review was to verify if there is any difference in the bite forces of patients with mandibular fractures fixed by locking or non-locking plates, testing the null hypothesis of no difference in this parameter. Data Synthesis  A systematic review of the literature was conducted using four databases (PubMed, Virtual Health Library, Web of Science and Science Direct) without restrictions as to publication date or language...
April 2018: International Archives of Otorhinolaryngology
https://www.readbyqxmd.com/read/29618888/strain-distribution-and-amount-of-force-required-during-pterygomaxillary-dysjunction-a-comparison-of-pterygoid-versus-shark-fin-osteotome
#14
Shoaib Parkar, Mueedul Islam, Ramakrishna Tangaturi, Hari Keerthy Panthala, Azhar Khan, Mohammed Imran, Jayesh Anand
Objective: This study was conducted to compare the efficacy of Obwegeser's pterygoid osteotome and Laster shark-fin osteotome by measurement of strain adjacent to the pterygomaxillary suture and the amount of force required for dysjunction. Materials and Methods: Two popular instruments Obwegesser's pterygoid and shark-fin osteotome were tested on dry human skulls. The external force required for separation of the pterygomaxillary suture with these osteotomes was generated by an electronically controlled 'Instron' tester Bi-06-108...
June 2018: Journal of Maxillofacial and Oral Surgery
https://www.readbyqxmd.com/read/29614465/running-at-submaximal-speeds-the-role-of-the-intact-and-prosthetic-limbs-for-trans-tibial-amputees
#15
Siobhan C Strike, Daniela Acrone, Michael Orendurff
BACKGROUND: Dynamic Elastic Response prostheses are designed absorb and return strain energy in running. Past research has focused on running prostheses with a single toe spring designed for high speeds. RESEARCH QUESTION: To determine how runners with amputation modulate the ground reaction force of each limb to run at different speeds using a general-purpose dynamic prosthesis which has a heel spring. METHODS: Overground running data were collected in 16 recreational runners (8 transtibial amputee using their own BladeXT prosthesis and 8 controls) using Vicon Nexus V...
March 27, 2018: Gait & Posture
https://www.readbyqxmd.com/read/29610989/the-use-of-gait-analysis-in-the-assessment-of-patients-afflicted-with-spinal-disorders
#16
Ram Haddas, Kevin L Ju, Theodore Belanger, Isador H Lieberman
PURPOSE: Use gait analysis to establish and detail the clinically relevant components of normal human gait, analyze the gait characteristics for those afflicted with spinal pathology, and identify those aspects of human gait that correlate with pre- and postoperative patient function and outcomes. METHODS: Twenty patients with adult degenerative scoliosis (ADS), 20 patients with cervical spondylotic myelopathy (CSM), and 15 healthy volunteers performed over-ground gait trials with a comfortable self-selected speed using video cameras to measure patient motion, surface electromyography (EMG) to record muscle activity, and force plates to record ground reaction force (GRF)...
April 2, 2018: European Spine Journal
https://www.readbyqxmd.com/read/29599857/modelling-and-predicting-backstroke-start-performance-using-non-linear-and-linear-models
#17
Karla de Jesus, Helon V H Ayala, Kelly de Jesus, Leandro Dos S Coelho, Alexandre I A Medeiros, José A Abraldes, Mário A P Vaz, Ricardo J Fernandes, João Paulo Vilas-Boas
Our aim was to compare non-linear and linear mathematical model responses for backstroke start performance prediction. Ten swimmers randomly completed eight 15 m backstroke starts with feet over the wedge, four with hands on the highest horizontal and four on the vertical handgrip. Swimmers were videotaped using a dual media camera set-up, with the starts being performed over an instrumented block with four force plates. Artificial neural networks were applied to predict 5 m start time using kinematic and kinetic variables and to determine the accuracy of the mean absolute percentage error...
March 2018: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29596981/the-vestibulomyogenic-balance-response-is-elevated-following-high-intensity-lengthening-contractions-of-the-lower-limb
#18
Emily I McIntosh, Geoffrey A Power, Brian H Dalton
The purpose was to investigate whether induced muscle weakness of the plantar and dorsiflexors through high-intensity lengthening contractions increases the vestibulomyogenic balance response. Nine males (∼25 years) participated in three experimental testing days to evaluate the vestibular control of standing balance and neuromuscular function of the plantar and dorsiflexors pre- and post (30 min, and 1 and 7 days) high-intensity lengthening plantar and dorsiflexions. To evaluate the vestibular-evoked balance response, participants stood quietly on a force plate while exposed to continuous, random electrical vestibular stimulation (EVS) for two 90-s trials...
March 26, 2018: Neuroscience Letters
https://www.readbyqxmd.com/read/29593160/fracture-force-for-veneered-materials-on-restorations-measured-by-torsion-testing
#19
Fumihiko Watanabe, Munetsugu Seto, Kazuhiko Ueda, Makoto Ozawa
The torsional fracture strength at the interface between a base plate and veneering material was evaluated for three kinds of veneered restoration: porcelain fused to zirconia (PFZ), porcelain fused to metal (PFM), and composite resin veneered metal (CRVM). The metal and zirconia base plate (30×4×0.4 mm) were prepared and these plates were veneered as test specimens using each material to a total thickness of 1.2 mm. Torsional force was applied to each specimen using a rotational speed of 1.0 deg/min until the veneering material underwent fracture or exfoliation...
March 28, 2018: Dental Materials Journal
https://www.readbyqxmd.com/read/29589848/mechanical-pressure-surface-excess-and-polar-order-of-a-dilute-rod-like-nanoswimmer-suspension-role-of-swimmer-wall-interactions
#20
Zhengjia Wang, Yen-Fu Chen, Hsuan-Yi Chen, Yu-Jane Sheng, Heng-Kwong Tsao
The mechanical pressure, surface excess, and polar order of a dilute rod-like nanoswimmer suspension confined by two parallel plates are explored by dissipative particle dynamics. The accumulation and preferred orientation of swimmers near the walls are distinctly shown through the density and polar order distributions for various active force, Fa, values and rod lengths. As Fa is increased, it is interesting to observe that there exists a maximum of the polar order, revealing that the dominant mechanism of the swimmer behavior can be altered by the coupling between the active force and the rod-wall interaction...
March 28, 2018: Soft Matter
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