Article
Engineering, Biomedical
Mingliang Jiang, Raghuveer Lalitha Sridhar, Andrew B. Robbins, Alan D. Freed, Michael R. Moreno
Summary: Uniaxial testing is common for mechanical analysis of biological materials, but biaxial testing offers a more comprehensive understanding. Custom biaxial testing systems can overcome limitations of commercially available systems, providing a wider range of testing capabilities.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2021)
Article
Biotechnology & Applied Microbiology
Michael J. Blair, Kyle P. Quinn
Summary: Quantitative Polarized Light Imaging (QPLI) is a technique used to compute the orientation of collagen fibers. In this paper, a single shot QPLI system (ssQPLI) without moving parts is presented, which can accurately quantify the fiber orientation and quickly provide pixel-wise measurements during mechanical testing. The ssQPLI system utilizes four cameras to simultaneously collect linearly polarized light in four states.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2022)
Article
Mechanics
Nasser Firouzi, Marco Amabili
Summary: The aim of this work is to develop a non-linear finite element formulation for two-dimensional growth of soft tissues, and several examples are provided to validate the proposed model.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2024)
Article
Engineering, Biomedical
Manuel Rausch, William D. D. Meador, John Toaquiza-Tubon, Omar Moreno-Flores, Adrian Buganza Tepole
Summary: Understanding the response of skin to superphysiological temperatures is crucial for the diagnosis, prognosis, and development of thermal therapies. This study explores the complex interdependence of time, temperature, direction, and load in skin's response to superphysiological temperatures. Two models are proposed to explain the observations, both based on the denaturation of the collagen microstructure. The success of these models provides guidance for future experiments and the engineering design of heat treatment therapies.
ACTA BIOMATERIALIA
(2022)
Article
Chemistry, Multidisciplinary
Bahram Mirani, Sean O. Mathew, Neda Latifi, Michel R. Labrosse, Brian G. Amsden, Craig A. Simmons
Summary: In this study, a novel method combining computational modeling, melt electrowriting (MEW), and design of experiments (DOE) is reported to generate scaffolds with prescribed mechanical properties to mimic the nonlinear and anisotropic behavior of three model tissues. The optimized scaffold architecture is then used to create functional scaffolds with accurate mechanics, which can also be used for tissue engineering applications.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Engineering, Chemical
Harry Ngwangwa, Fulufhelo Nemavhola, Thanyani Pandelani, Makhosasana Msibi, Israel Mabuda, Neil Davies, Thomas Franz
Summary: This study evaluates the passive mechanical property differences in the three main walls of the rat heart based on biaxial tensile test data. The findings suggest that there are variations in the mechanical properties of different ventricle walls, including differences in the toe region strain range, strain energy storage, and anisotropy. These findings emphasize the importance of considering wall-specific material parameters to accurately model ventricular mechanics.
Article
Engineering, Biomedical
Ankush Aggarwal, Luke T. Hudson, Devin W. Laurence, Chung-Hao Lee, Sanjay Pant
Summary: A Bayesian approach was used to calculate the relative probabilities of different constitutive models for porcine aortic valve tissue based on experimental data. The May-Newman model was found to be the most probable model for the overall data, while the Lee-Sacks model and May-Newman model were equally probable for non-coronary cusps. The results demonstrate the ability of a PCA-based statistical model to capture significant variations in the mechanical properties of soft tissues.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Taeksang Lee, Maria A. Holland, Johannes Weickenmeier, Arun K. Gosain, Adrian Buganza Tepole
Summary: Tissues in vivo adapt to physiological and disease conditions through growth and remodeling, controlling their microstructure to achieve homeostasis at the microscopic scale. The concept of incompatibility describes the source of residual stresses as cells manipulate their immediate extracellular environment. By using a finite volume growth framework, growth and remodeling can be accurately captured in continuum mechanics, shedding light on the role of growth in the development of tissue defects and residual stresses.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2021)
Article
Biotechnology & Applied Microbiology
Sai Naga Sri Harsha Chittajallu, Ashutosh Richhariya, Kwong Ming Tse, Viswanath Chinthapenta
Summary: Computational modelling of damage and rupture of non-connective and connective soft tissues is crucial for understanding failures. Recent advancements in damage models have applications in developing artificial tissues, medical devices/implants, and surgical intervention. This article reviews the recently developed models that consider tissue microstructure, providing key conceptual ideas, advantages, limitations, and challenges for damage and rupture models in soft tissues.
BIOENGINEERING-BASEL
(2022)
Article
Multidisciplinary Sciences
Luigi Santamaria Amato, Deborah Katia Pallotti, Mario Siciliani de Cumis, Daniele Dequal, Andrea Andrisani, Sergei Slussarenko
Summary: Nonlocality, a key conflict between Quantum Physics and Relativity, has troubled physicists even more than realism as it suggests the possibility of superluminal communication, also known as Einsteinian Spooky action at a distance. Since 2000, various tests have been conducted to determine the lower bounds of the Spooky action at a distance velocity (c beta(t,max)). These tests typically involve Bell Tests performed in kilometer-long experimental setups, with careful adjustments and assumptions dictated by the experimental conditions, in order to improve the constraints.
SCIENTIFIC REPORTS
(2023)
Article
Materials Science, Multidisciplinary
N. Connesson, N. Briot, P. Y. Rohan, P. A. Barraud, S. A. Elahi, Y. Payan
Summary: This study presents a suction-based method for characterizing the mechanical properties of soft tissues, particularly bilayered structures. The method provides real-time identification of the bilayers' Young's moduli and can also determine the upper layer thickness. The approach was successfully tested on silicone phantoms and in vivo on human abdomen skin.
EXPERIMENTAL MECHANICS
(2023)
Article
Chemistry, Physical
Shu-Wen W. Chen, Jean-Marie Teulon, Harinderbir Kaur, Christian Godon, Jean-Luc Pellequer
Summary: Measuring the structural stiffness is a method to study the elastic response of materials under external indentation, with the goal of revealing how nanostructured components or physiological circumstances affect the material's elastic behavior. In this study, atomic force microscopy (AFM) was used with a nano-scale pyramidal tip to indent the surfaces of polyacrylamide gels and Arabidopsis thaliana seedling roots with different softness. The stiffness-depth curve derived from the measured force showed heterogeneous elasticity. The responding force was decomposed into depth-impact, Hookean, and tip-shape components, called trimechanic, allowing the researchers to observe how these three restoring nanomechanics change with depth. The trimechanic theory provides insights into the restoring nanomechanics of indented materials and can differentiate the softness between different gel categories.
NANOSCALE HORIZONS
(2023)
Article
Mathematics, Applied
Ankush Aggarwal, Damiano Lombardi, Sanjay Pant
Summary: The study proposes a new optimal design framework based on information-theoretic measures, tested on protocols for estimating hyperelastic model parameters in biaxial soft tissue experiments. Results indicate that lower angles have lower information content compared to higher angles, and fewer angles with appropriate combinations can lead to higher information gains.
Article
Engineering, Biomedical
Andrea Acuna, Julian M. Jimenez, Naomi Deneke, Sean M. Rothenberger, Sarah Libring, Luis Solorio, Vitaliy L. Rayz, Chelsea S. Davis, Sarah Calve
Summary: Characterizing the mechanical properties of tissues is crucial for biomaterials and regenerative therapies; understanding microenvironments can promote growth and remodeling; a micromanipulator and spring system was developed to mechanically test small, soft materials under tension.
ACTA BIOMATERIALIA
(2021)
Article
Engineering, Biomedical
Jumpei Takada, Kohei Hamada, Xiaodong Zhu, Yusuke Tsuboko, Kiyotaka Iwasaki
Summary: This study aimed to develop a biaxial tensile testing system to measure the mechanical properties of both sides of the tissue and reduce stress concentration. The test system showed that the mechanical response of the aortic tissue was significantly different between the intimal and adventitial side in the high-strain range due to collagen fiber disruption, predominantly in the longitudinal direction. However, in the mid-strain range, there was no difference in the elastic modulus between the intimal and adventitial sides, regardless of fiber disruption, and collagen fibers were elongated.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2023)
Article
Orthopedics
Nathan W. Skelley, Ryan M. Castile, Timothy E. York, Viktor Gruev, Spencer P. Lake, Robert H. Brophy
AMERICAN JOURNAL OF SPORTS MEDICINE
(2015)
Article
Orthopedics
Fei Fang, Spencer P. Lake
JOURNAL OF ORTHOPAEDIC RESEARCH
(2015)
Article
Engineering, Biomedical
Spencer P. Lake, Shuddhadeb Ray, Ahmed M. Zihni, Dominic M. Thompson, Jeffrey Gluckstein, Corey R. Deeken
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2015)
Review
Cell Biology
Jeremy D. Eekhoff, Fei Fang, Spencer P. Lake
CONNECTIVE TISSUE RESEARCH
(2018)
Article
Ophthalmology
Benjamen A. Filas, Nihar S. Shah, Qianru Zhang, Ying-Bo Shui, Spencer P. Lake, David C. Beebe
INVESTIGATIVE OPHTHALMOLOGY & VISUAL SCIENCE
(2014)
Article
Biophysics
Lijuan Zhang, Spencer P. Lake, Victor K. Lai, Catalin R. Picu, Victor H. Barocas, Mark S. Shephard
JOURNAL OF BIOMECHANICAL ENGINEERING-TRANSACTIONS OF THE ASME
(2013)
Article
Biophysics
Fei Fang, Amrita S. Sawhney, Spencer P. Lake
JOURNAL OF BIOMECHANICS
(2014)
Article
Biochemical Research Methods
Timothy York, Lindsey Kahan, Spencer P. Lake, Viktor Gruev
JOURNAL OF BIOMEDICAL OPTICS
(2014)
Article
Engineering, Biomedical
Corey R. Deeken, Dominic M. Thompson, Ryan M. Castile, Spencer P. Lake
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2014)
Article
Cell Biology
Neeta Adhikari, Marie Billaud, Marjorie Carlson, Spencer P. Lake, Kim Ramil C. Montaniel, Rod Staggs, Weihua Guan, Dinesha Walek, Snider Desir, Brant E. Isakson, Victor H. Barocas, Jennifer L. Hall
MOLECULAR AND CELLULAR BIOCHEMISTRY
(2014)
Article
Engineering, Electrical & Electronic
Timothy York, Samuel B. Powell, Shengkui Gao, Lindsey Kahan, Tauseef Charanya, Debajit Saha, Nicholas W. Roberts, Thomas W. Cronin, Justin Marshall, Samuel Achilefu, Spencer P. Lake, Baranidharan Raman, Viktor Gruev
PROCEEDINGS OF THE IEEE
(2014)
Review
Orthopedics
Jeffrey Ryan Hill, Jeremy D. Eekhoff, Robert H. Brophy, Spencer P. Lake
JOURNAL OF ORTHOPAEDIC RESEARCH
(2020)
Article
Multidisciplinary Sciences
Jeremy D. Eekhoff, Spencer P. Lake
JOURNAL OF THE ROYAL SOCIETY INTERFACE
(2020)
Article
Orthopedics
Ryan M. Castile, Matthew J. Jenkins, Spencer P. Lake, Robert H. Brophy
JOURNAL OF BONE AND JOINT SURGERY-AMERICAN VOLUME
(2020)
Article
Engineering, Biomedical
Jeremy D. Eekhoff, James A. Abraham, Hayden R. Schott, Lorenzo F. Solon, Gabriella E. Ulloa, Jennifer A. Zellers, Paul C. Cannon, Spencer P. Lake
Summary: This study evaluated the quantity, structure, and mechanical contribution of elastin in functionally distinct tendons across species. Tendons with an energy-storing function had more elastin content than tendons with a positional function, and human tendon had at least twice the elastin content of other species. The mechanical effects of elastin degradation varied between tendon type and species, with human tendon and energy-storing tendon being more affected.
ACTA BIOMATERIALIA
(2023)