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Journal of the Mechanical Behavior of Biomedical Materials

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https://www.readbyqxmd.com/read/30241762/corrigendum-to-effect-of-acidity-upon-attrition-corrosion-of-human-dental-enamel-j-mech-behav-biomed-mater-44-2015-23-34
#1
Yun-Qi Wu, Joseph A Arsecularatne, Mark Hoffman
No abstract text is available yet for this article.
September 18, 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/30205324/the-failure-of-polypropylene-surgical-mesh-in-vivo
#2
REVIEW
David Taylor
Surgical mesh materials made from fibres of polypropylene (PP) have been widely used for over fifty years. However in recent times the use of these materials has been called into question for certain surgical operations, known as "pelvic organ" or "transvaginal" procedures. This article reviews the current state of knowledge and uses some simple biomechanics analysis in order to make recommendations for future work. My conclusion is that the failure rate of PP mesh in pelvic organ products is unacceptably high whilst being much lower when it is used for hernia repair...
September 8, 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/30236977/the-effect-of-pleural-fluid-layers-on-lung-surface-wave-speed-measurement-experimental-and-numerical-studies-on-a-sponge-lung-phantom
#3
Boran Zhou, Xiaoming Zhang
Pleural effusion manifests as compression of pleural fluid on the lung parenchyma contributing to hypoxemia. Medical procedures such as drainage of plural fluid releases this compression and increases oxygenation. However, the effect of pleural effusion on the elasticity of lung parenchyma is unknown. By using lung ultrasound surface wave elastography (LUSWE) and finite element method (FEM), the effect of pleural effusion on the elasticity of superficial lung parenchyma in terms of surface wave speed measurement was evaluated in a sponge phantom study...
September 6, 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/30236978/braided-bioresorbable-cardiovascular-stents-mechanically-reinforced-by-axial-runners
#4
Fan Zhao, Wen Xue, Fujun Wang, Jing Sun, Jing Lin, Laijun Liu, Kun Sun, Lu Wang
Polymeric bioresorbable stents (BRSs) can eliminate the long-term stent restenosis by degrading after vascular remolding and have been recommended for the congenital heart disease treatment. However, the mechanical weakness remains one of main inferiorities of their applications. So, the aim of this study was to develop mechanically reinforced bioresorbable stents (MRBSs) based on poly(p-dioxanone) (PPDO) monofilaments and braiding technology. Axial runners were introduced and MRBSs showed greatly higher compression force and relatively lower viscous performance, as well as longer mechanical stability during degradation, compared with controls...
September 5, 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/30223213/precision-of-different-fatigue-methods-for-predicting-glass-ceramic-failure
#5
Rodrigo Ottoni, Jason A Griggs, Pedro H Corazza, Álvaro Della Bona, Márcia Borba
This study aimed to characterize the fatigue behavior using two fatigue methods, boundary and staircase, and to predict the probability of failure (Pf ) of zirconia-reinforced lithium silicate glass-ceramic (ZLS). Bar-shaped specimens of ZLS (18 ×4 ×1.2 mm) were fabricated. Thirty specimens were subjected to a three-point flexural strength test using a universal testing machine with 0.5 mm/min crosshead speed, in 37 °C distilled water. Flexural strength data were analyzed with Weibull statistics...
September 5, 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/30219741/magic-angles-and-fibre-stretch-in-arterial-tissue-insights-from-the-linear-theory
#6
C O Horgan, J G Murphy
This work is motivated by the current widespread interest in modelling the mechanical response of arterial tissue. A widely used approach within the context of anisotropic nonlinear elasticity is to use an orthotropic incompressible hyperelasticity model which, in general, involves a strain-energy density that depends on seven independent invariants. The complexity of such an approach in its full generality is daunting and so a number of simplifications have been introduced in the literature to facilitate analytical tractability...
September 5, 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/30218973/optimizing-the-deformation-behavior-of-stent-with-nonuniform-poisson-s-ratio-distribution-for-curved-artery
#7
Yafeng Han, Wenfeng Lu
Stent implantation at a highly curved artery has always been a challenge, considering the relatively high chance of in-stent restenosis (ISR) caused by severe straightening effect and high strain energy over the vessel wall. In this paper, a novel optimization based design method was proposed to manipulate the deformation behavior of the common ring-and-link stent. By changing the location of the connection point between rings and links, traditional ring-and-link structure was modified to achiever tunable Poisson's ratio (PR)...
September 5, 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/30216930/effects-of-compression-on-orientation-of-ligands-in-fluorescent-complexes-between-hydroxyapatite-with-amino-acids-and-their-optical-properties
#8
Sarita Morakul, Yuichi Otsuka, Andaradhi Nararya, Motohiro Tagaya, Satoshi Motozuka, Kiyoshi Ohnuma, Yukio Miyashita, Yoshiharu Mutoh
This study aims to reveal the effects of pressure during cold isostatic pressing (CIP) on the microstructure and optical properties of fluorescent HAp complexes. Although the microsturucture-dependent properties of fluorescent HAp complexes have been reported to improve the antibacterial properties of photocatalyst coating layers, the mechanism behind the changes in the fluorescence properties of highly compressed HAp complexes has not yet been unveiled. CIP was successfully used to fabricate fluorescent HAp - amino acid complexes, and their fluorescence intensities increased with increasing fabrication pressure...
September 5, 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/30212687/effect-of-organic-inorganic-nanoparticles-on-performance-of-polyurethane-nanocomposites-for-potential-wound-dressing-applications
#9
Arman Jafari, Shadi Hassanajili, Mohammad Bagher Karimi, Amir Emami, Farnaz Ghaffari, Negar Azarpira
This study focuses on the evaluation and modification of polyurethane (PU) membranes containing organic and inorganic nanoparticles for potential use as a wound dressing. For the purpose of PU nanocomposite preparation, chitosan (CS) was converted into nanoparticles by the ionic-gelation method to improve its blending capability with the PU matrix. These CS nanoparticles (nano-CS) were obtained as a hydrophilic organic filler with different contents and were utilized along with inorganic titanium dioxide (TiO2 ) nanoparticles in the nanocomposite membrane preparation...
September 4, 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/30236979/mechanical-and-structural-analysis-of-the-pulmonary-valve-in-congenital-heart-defects-a-presentation-of-two-case-studies
#10
Fatiesa Sulejmani, Anastassia Pokutta-Paskaleva, Olga Salazar, Mohsen Karimi, Wei Sun
OBJECTIVE: Congenital Heart Disease (CHD) is the leading cause of pediatric mortality, with many cases affecting the right ventricular outflow tract (RVOT) or pulmonary valve (PV). Understanding the mechanics of the disease condition can provide insight into development of durable repair techniques and bioengineered replacement devices. This work presents a mechanical and structural analysis of the pulmonary valve of two pediatric cases. METHODS: Two PV tissues were excised as part of the operative procedure...
August 31, 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/30223212/the-effect-of-3d-printed-ti-6-al-4-v-scaffolds-with-various-macropore-structures-on-osteointegration-and-osteogenesis-a-biomechanical-evaluation
#11
Han Wang, Kexin Su, Leizheng Su, Panpan Liang, Ping Ji, Chao Wang
A properly designed porous scaffold can accelerate the osseointegration process, and the use of computer-aided design (CAD) and additive manufacturing (AM) techniques has the potential to improve the traditional porous scaffold approach. In this study, we evaluate the effect of porous Ti6 Al4 V (Ti) with different pore structures on osteointegration and osteogenesis. Porous Ti scaffolds with different pore structures based on four commercially available implants were designed and manufactured by CAD and selective laser melting (SLM)...
August 31, 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/30205326/visco-elasto-plastic-modeling-of-small-intestinal-submucosa-sis-for-application-as-a-vascular-graft
#12
Paolo Sánchez Puccini, Juan Carlos Briceño Triana
In developing new tissue engineered for vascular grafts, the mechanical properties of the material and its evolution once implanted are of utmost importance because they determine the regeneration of the vessel and the blood flow through the conduit. In fact, compliance mismatch is considered the main determinant of graft failure. In this research, we analyze the dynamic properties of the small intestinal submucosa (SIS), and propose and validate a constitutive model to fit the material's behavior. A uniaxial creep and recovery test was performed on SIS tubes to find the constitutive parameters...
August 31, 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/30196188/the-role-of-water-in-the-initial-sliding-of-nacreous-tablets-findings-from-the-torsional-fracture-of-dry-and-hydrated-nacre
#13
Saleh Alghamdi, Fen Du, Jie Yang, Ting Tan
Nacre exhibits remarkable mechanical properties resulting from its hierarchical brick-and-mortar structures. By using pure shear stresses of torsion, we demonstrate how nacre resists the initial tablet sliding by tuning its nanoscale toughening mechanisms in dry and hydrated conditions. In hydrated nacre, hydrogen bonds between water molecules and organic matrices provide temporal paths for stress redistributions, through which the shear resistance is gradually transferred from mineral bridges to contacted nanoasperities...
August 31, 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/30196183/influence-of-primers-on-the-properties-of-the-adhesive-interface-between-resin-composite-luting-cement-and-fiber-reinforced-composite
#14
Aftab A Khan, Abdulaziz A Al-Kheraif, Badreldin A Mohamed, Leila Perea-Lowery, Eija Säilynoja, Pekka K Vallittu
OBJECTIVES: The purpose of this study was to characterize the adhesive interface formed due to the dissolving capability of 4 primer systems into pre-polymerized semi-interpenetrating polymer network (semi-IPN)-based fiber-reinforced composite (FRC) and luting cement. MATERIALS AND METHODS: Semi-IPN FRC (everStick C&B, StickTech) prepregs stored for various durations (at 4 °C; 1, 1.5, and 3 years) were used to fabricate the specimens. FRC specimens (n = 10) were light-cured and treated with primers before adhering a luting cement onto them...
August 31, 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/30236976/biphasic-analysis-of-rat-brain-slices-under-creep-indentation-shows-nonlinear-tension-compression-behavior
#15
Ruizhi Wang, Malisa Sarntinoranont
Biphasic theory can provide a mechanistic description of deformation and transport phenomena in soft tissues, and has been used to model surgery and drug delivery in the brain for decades. Knowledge of corresponding mechanical properties of the brain is needed to accurately predict tissue deformation and flow transport in these applications. Previously in our group, creep indentation tests were conducted for multiple anatomical regions in acute rat brain tissue slices. In the current study, a biphasic finite element model of creep indentation was developed with which to compare these data...
August 30, 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/30223211/effect-of-pore-geometry-on-the-fatigue-properties-and-cell-affinity-of-porous-titanium-scaffolds-fabricated-by-selective-laser-melting
#16
Danlei Zhao, Yutian Huang, Yong Ao, Changjun Han, Qian Wang, Yan Li, Jie Liu, Qingsong Wei, Zhen Zhang
Porous titanium scaffolds with different unit cell type (tetrahedron and octahedron) and pore size (500 µm and 1000 µm) were fabricated by selective laser melting (SLM), and the effects of unit cell type and pore size on their fatigue properties and cell affinity were studied. The fatigue properties were performed by static and dynamic mechanical testing, while the cell affinity was evaluated in vitro with mouse osteoblast cells. It was found that octahedron scaffolds exhibited superior static mechanical properties, longer fatigue lives and higher fatigue strength in comparison to those of tetrahedron ones...
August 30, 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/30216931/atomic-force-microscopy-measurements-probing-the-mechanical-properties-of-single-collagen-fibrils-under-the-influence-of-uv-light-in-situ
#17
Marcus Schulze, Melanie Rogge, Robert W Stark
Collagen plays a decisive role as a functional substrate in tissue engineering. In particular, the rigidity of the collagen influences the behaviour of the attached cells. Thus, modification and controlled adjustment of collagen's characteristics are essential. To this end, controlled exposure to ultraviolet (UV) light is a promising process because it can be temporally and spatially well defined. In this study, we investigated the effect of UV exposure on surface supported single collagen fibrils in situ. This procedure allowed for a direct comparison between the untreated and modified states of type I collagen...
August 30, 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/30199838/origin-of-low-young-modulus-of-multicomponent-biomedical-ti-alloys-seeking-optimal-elastic-properties-through-a-first-principles-investigation
#18
P Kwasniak, J S Wróbel, H Garbacz
Multicomponent, biomedical β-Ti alloys offer ultra-low Young modulus values that are related to a unique and poorly understood reduction of C44 and C' elastic constants in comparison with binary systems. The elastic properties of such materials are difficult to control due to the large variations occurring even for a small change in chemical composition, which cannot be explained using existing theories. In this article, we investigate the above issues through systematic ab initio elastic constants calculations for a series of binary, ternary and quaternary Ti alloys...
August 30, 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/30199837/design-of-a-surrogate-for-evaluation-of-methods-to-predict-bone-bending-stiffness
#19
Caitlyn J Collins, Matthew Boyer, Thomas D Crenshaw, Heidi-Lynn Ploeg
The high incidence of osteoporosis and related fractures demands for the use and development of methods capable of detecting changes in bone mechanical properties. The most common clinical and laboratory methods used to detect changes in bone mechanical properties, such as stiffness, strength, or flexural rigidity, include: mechanical testing, medical imaging, medical image-based analytical calculations, and medical image-based finite element analysis. However, the innate complexity of bone makes validation of the results from each method difficult...
August 30, 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/30196187/femoral-entheseal-shape-and-attachment-angle-as-potential-risk-factors-for-anterior-cruciate-ligament-injury
#20
Callan M Luetkemeyer, Benjamin C Marchi, James A Ashton-Miller, Ellen M Arruda
Although non-contact human ACL tears are a common knee injury, little is known about why they usually fail near the femoral enthesis. Recent histological studies have identified a range of characteristic femoral enthesis tidemark profiles and ligament attachment angles. We tested the effect of the tidemark profile and attachment angle on the distribution of strain across the enthesis, under a ligament stretch of 1.1. We employed a 2D analytical model followed by 3D finite element models using three constitutive forms and solved with ABAQUS/Standard...
August 30, 2018: Journal of the Mechanical Behavior of Biomedical Materials
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