Journal articles: 'Skin biomechanics'

1

Ibrahim, Sherrif F. "Commentary: Biomechanics of the Skin." Dermatologic Surgery 39, no. 2 (February 2013): 204. http://dx.doi.org/10.1111/dsu.12006.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Vesentini, S., A. Redaelli, and F. M. Montevecchi. "Skin nanostructural features determine suture biomechanics." IEEE Transactions on Nanobioscience 2, no. 2 (June 2003): 79–88. http://dx.doi.org/10.1109/tnb.2003.813925.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Ebersole, G. C., P. M. Anderson, and H. M. Powell. "Epidermal differentiation governs engineered skin biomechanics." Journal of Biomechanics 43, no. 16 (December 2010): 3183–90. http://dx.doi.org/10.1016/j.jbiomech.2010.07.026.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Lovald, Scott T., Shelby G. Topp, Jorge A. Ochoa, and Curtis W. Gaball. "Biomechanics of the Monopedicle Skin Flap." Otolaryngology–Head and Neck Surgery 149, no. 6 (September 30, 2013): 858–64. http://dx.doi.org/10.1177/0194599813505836.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Mohd Noor, Siti Noor Azizzati, and Jamaluddin Mahmud. "A Review on Synthetic Skin: Materials Investigation, Experimentation and Simulation." Advanced Materials Research 915-916 (April 2014): 858–66. http://dx.doi.org/10.4028/www.scientific.net/amr.915-916.858.

Full text

Abstract:

The skin, which acts as a protector of the body from potentially harmful external environment is a multi-layered tissue that exhibits complex mechanical behaviour. The aim of this paper is to review available studies of human skin using experimental and numerical methods in determining the mechanical properties of skin. Mechanical properties of skin are vital to the certain industries such as surgical, cosmetics, forensic science and etc., where skin study currently leads to the development of an ultimate skin-like substitute that contains anatomy and physiology characteristics. A number of research papers and journals related to skin were revised and currently findings show that available information in regard to skin biomechanical properties is limited and the actual skin behavior is not comprehensively examined. Nevertheless, further in-depth research is required to develop appropriate techniques in estimating the skin properties which are valuable to the development of biomechanics study of skin.

APA, Harvard, Vancouver, ISO, and other styles

6

Silva, Henrique, Francisco FC Rego, Catarina Rosado, and Luis Monteiro Rodrigues. "Novel 3D “active” representations of skin biomechanics." Journal Biomedical and Biopharmaceutical Research 13, no. 2 (December 2016): 219–27. http://dx.doi.org/10.19277/bbr.13.2.140.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Corr, David T., and David A. Hart. "Biomechanics of Scar Tissue and Uninjured Skin." Advances in Wound Care 2, no. 2 (March 2013): 37–43. http://dx.doi.org/10.1089/wound.2011.0321.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Lucas, James B. "The Physiology and Biomechanics of Skin Flaps." Facial Plastic Surgery Clinics of North America 25, no. 3 (August 2017): 303–11. http://dx.doi.org/10.1016/j.fsc.2017.03.003.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Durak, Saliha, Tuncay olak, and Mehmet Yener. "Topographic Variations of Skin Biomechanics: Cadaver Study." Annals of Medical Research 29, no. 11 (2022): 1. http://dx.doi.org/10.5455/annalsmedres.2022.04.134.

Full text

Abstract:

Objectives: The skin is a multifunctional organ that covers up the entire surface of the body. Material properties such as hyperelasticity, viscoelasticity and plasticity are very important for the development of new biological materials. The main focus of this study is to investigate the biomechanical properties of the dermis and to examine how these vary according to different body parts. Methods: Skin samples were dissected from various parts of the body. All skin samples were tested in uniaxial tension parallel to their long axis. A strength-elongation curve was obtained and the maximum strength and maximum elongation values were determined from this curve for each tensile test performed. Reaction forces and displacements were determined by software. Results: The results of our study showed a statistically significant difference in the evaluation between the scalp, face, upper and lower extremities for elastic modulus, tensile strength and thickness. It has been observed that the elastic modulus, tensile strength and thickness values vary depending on the topographic region of the body. According to our results, the upper extremity showed the highest elastic modulus among all regions (42.70 ± 8.92 MPa). The highest tensile strength was also measured for the upper extremity skin and its value was determined as 17.72 ± 4.00 MPa. Conclusions: Data obtained from this study may provide valuable information for modeling purposes, basic data for tissue grafts and comparison of tissue characteristics after head trauma or forensic examinations.

APA, Harvard, Vancouver, ISO, and other styles

10

Kuwazuru, Osamu, Jariyaporn Saothong, and Nobuhiro Yoshikawa. "WRINKLE ANALYSIS OF AGING SKIN BY FINITE ELEMENT METHOD(1E1 Computational Biomechanics)." Proceedings of the Asian Pacific Conference on Biomechanics : emerging science and technology in biomechanics 2007.3 (2007): S77. http://dx.doi.org/10.1299/jsmeapbio.2007.3.s77.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Uyeno, T. A., and A. J. Clark. "On the fit of skins with a particular focus on the biomechanics of loose skins of hagfishes." Canadian Journal of Zoology 98, no. 12 (December 2020): 827–43. http://dx.doi.org/10.1139/cjz-2019-0296.

Full text

Abstract:

There is a considerable diversity in how skins fit. Here, we review the function of both tight and loose skins and note that the latter are poorly understood. Analysis of loose skin examples suggest five functional categories: (I) freedom of movement, (II) surface area enhancement, (III) increased structural extensibility, (IV) lubrication, and (V) maladaptive examples arising through sexual or artificial selection. We investigate the skins of hagfishes as a model for understanding loose skin function by examining its structure using histology, standardized puncture resistance testing using the ASTM F1306 protocol, and the effect of internal pressure using a simple inflated balloon model. Skins of hagfishes are composed of multiple layers of cross-helically wound connective tissue fibers of a 45° angle to the longitudinal axis, resulting in a skin that functions as fabric cut “on the bias”. Hagfish skins are relatively yielding; however, skin looseness adds a “structural extensibility” that may allow hagfishes to compensate for low puncture resistance. Physical balloon models, with stiff cores that limit length changes, show that only low pressures allow short loop radii without local buckling. Hagfishes represent ideal organisms for studying loose skin function because their skins seem to fit in all functionally adaptive categories.

APA, Harvard, Vancouver, ISO, and other styles

12

SUGIURA, Ryuji, Tetsuya NISHIMOTO, Rie NISHIKATA, and Tatsuo FUJIKAWA. "Impact biomechanics of the skin and soft tissue." Proceedings of the Bioengineering Conference Annual Meeting of BED/JSME 2017.29 (2017): 1E24. http://dx.doi.org/10.1299/jsmebio.2017.29.1e24.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Zöllner, Alexander M., Adrian Buganza Tepole, and Ellen Kuhl. "On the biomechanics and mechanobiology of growing skin." Journal of Theoretical Biology 297 (March 2012): 166–75. http://dx.doi.org/10.1016/j.jtbi.2011.12.022.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Chanda, Arnab. "Biomechanical Modeling of Human Skin Tissue Surrogates." Biomimetics 3, no. 3 (July 23, 2018): 18. http://dx.doi.org/10.3390/biomimetics3030018.

Full text

Abstract:

Surrogates, which precisely simulate nonlinear mechanical properties of the human skin at different body sites, would be indispensable for biomechanical testing applications, such as estimating the accurate load response of skin implants and prosthetics to study the biomechanics of static and dynamic loading conditions on the skin, dermatological and sports injuries, and estimating the dynamic load response of lethal and nonlethal ballistics. To date, human skin surrogates have been developed mainly with materials, such as gelatin and polydimethylsiloxane (PDMS), based on assumption of simplified mechanical properties, such as an average elastic modulus (estimated through indentation tests), and Poisson’s ratio. In addition, pigskin and cowhides, which have widely varying mechanical properties, have been used to simulate human skin. In the current work, a novel elastomer-based material system is developed, which precisely mimics the nonlinear stress–stretch behavior, elastic modulus at high and low strains, and fracture strengths of the natural human skin at different body sites. The manufacturing and fabrication process of these skin surrogates are discussed, and mechanical testing results are presented.

APA, Harvard, Vancouver, ISO, and other styles

15

Chatzistergos, Panagiotis E., David Allan, Nachiappan Chockalingam, and Roozbeh Naemi. "Shore hardness is a more representative measurement of bulk tissue biomechanics than of skin biomechanics." Medical Engineering & Physics 105 (July 2022): 103816. http://dx.doi.org/10.1016/j.medengphy.2022.103816.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Ito, Masato, Jonas A. Pramudita, Ryoji Watanabe, Harutaka Kubota, and Yuji Tanabe. "GS10-2 DEVELOPMENT OF SKIN LACERATION INJURY CRITERION : NUMERICAL STUDY USING SKIN FINITE ELEMENT MODEL(GS10: Sports and Impact Biomechanics)." Proceedings of the Asian Pacific Conference on Biomechanics : emerging science and technology in biomechanics 2015.8 (2015): 211. http://dx.doi.org/10.1299/jsmeapbio.2015.8.211.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Sommers, Marilyn S., Yadira Regueira, Deborah A. Tiller, Janine S. Everett, Kathleen Brown, Emily Brignone, and Jamison D. Fargo. "Understanding rates of genital-anal injury: Role of skin color and skin biomechanics." Journal of Forensic and Legal Medicine 66 (August 2019): 120–28. http://dx.doi.org/10.1016/j.jflm.2019.06.019.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Maroński, Ryszard. "Aeronautical Inspirations in Biomechanics." Polish Journal of Sport and Tourism 24, no. 1 (March 28, 2017): 5–9. http://dx.doi.org/10.1515/pjst-2017-0001.

Full text

Abstract:

Abstract Introduction. The goal of the paper is to show that some problems formulated in the dynamics of atmospheric flight are very similar to the problems formulated in the biomechanics of motion and medicine. Three problems were compared: minimumheat transfer from the boundary layer to the ballistic missile skin, minimum-time ski descent, and the minimisation of the negative cumulated effect of the drug in cancer chemotherapy. Material and methods. All these problems are solved using the same method originally developed for aerospace systems - the method of Miele (the extremisation method of linear integrals via Green’s theorem). Results. It is shown that the problems arising in different branches of knowledge are very similar in problem formulations, mathematical models, and solution methods used. Conclusions. There are no barriers between different disciplines.

APA, Harvard, Vancouver, ISO, and other styles

19

Zhang, Jun, Ruixin Liang, Newman Lau, Qiwen Lei, and Joanne Yip. "A Systematic Analysis of 3D Deformation of Aging Breasts Based on Artificial Neural Networks." International Journal of Environmental Research and Public Health 20, no. 1 (December 27, 2022): 468. http://dx.doi.org/10.3390/ijerph20010468.

Full text

Abstract:

The measurement and prediction of breast skin deformation are key research directions in health-related research areas, such as cosmetic and reconstructive surgery and sports biomechanics. However, few studies have provided a systematic analysis on the deformations of aging breasts. Thus, this study has developed a model order reduction approach to predict the real-time strain of the breast skin of seniors during movement. Twenty-two women who are on average 62 years old participated in motion capture experiments, in which eight body variables were first extracted by using the gray relational method. Then, backpropagation artificial neural networks were built to predict the strain of the breast skin. After optimization, the R-value for the neural network model reached 0.99, which is within acceptable accuracy. The computer-aided system of this study is validated as a robust simulation approach for conducting biomechanical analyses and predicting breast deformation.

APA, Harvard, Vancouver, ISO, and other styles

20

Mahmud, Jamaluddin. "Keynote Speech on Skin Biomechanics: An Experimental-Numerical Integration." Journal of Medical and Bioengineering 4, no. 1 (2015): 24–30. http://dx.doi.org/10.12720/jomb.4.1.24-30.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Blackstone, Britani N., Traci A. Wilgus, Sashwati Roy, Brian C. Wulff, and Heather M. Powell. "Skin Biomechanics and miRNA Expression Following Chronic UVB Irradiation." Advances in Wound Care 9, no. 3 (March 1, 2020): 79–89. http://dx.doi.org/10.1089/wound.2019.1034.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Boo-Chai, Khoo. "Laboratory research of biomechanics assay of skin wound healing." Plastic & Reconstructive Surgery 98, no. 2 (August 1996): 381. http://dx.doi.org/10.1097/00006534-199608000-00050.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

de Andrade, Sérgio Faloni, Patricia Rijo, Clemente Rocha, Lin Zhu, and Luis Monteiro Rodrigues. "Characterizing the Mechanism of Action of Essential Oils on Skin Homeostasis—Data from Sonographic Imaging, Epidermal Water Dynamics, and Skin Biomechanics." Cosmetics 8, no. 2 (May 13, 2021): 36. http://dx.doi.org/10.3390/cosmetics8020036.

Full text

Abstract:

Essential oils (EOs) have been recognized as materials of interest for dermatological applications, although some doubts remain regarding their safety and efficacy. We studied the action mechanisms of EOs from lavender and sage in human skin. Extracted EOs were incorporated (at 5% and 10%) in almond oil as a vehicle. Eleven healthy volunteers were selected and the prepared oils were tested on both forearms. All procedures respected the principles of good clinical practice. Effects were followed through high resolution sonography (HRS), epidermal water dynamics, and biomechanics. All variables were measured before and 30 min after application. Nonparametric statistical comparisons were applied (p < 0.05). HRS revealed a more echogenic epidermis, with a significant echogenicity decrease in the dermis (higher water retention) for all formulations. Significant TEWL decrease and an increase in superficial and deep epidermal hydration were also observed. These results indicate that EOs penetrate only into the most superficial layers of the skin, which is important for their safety profile. Furthermore, this “filmogenic” mechanism improving the epidermal water balance seems to connect directly with the observed biomechanical enhancement. These results confirm the clinical relevance of these compounds, in particular to restore the epidermal water content and prevent xerosis and other related disorders in sensitive (atopic, elderly) patients.

APA, Harvard, Vancouver, ISO, and other styles

24

Yoganandan, N., and F. A. Pintar. "Inertial Loading of the Human Cervical Spine." Journal of Biomechanical Engineering 119, no. 3 (August 1, 1997): 237–40. http://dx.doi.org/10.1115/1.2796086.

Full text

Abstract:

While the majority of experimental cervical spine biomechanics research has been conducted using slowly applied forces and/or moments, or dynamically applied forces with contact, little research has been performed to delineate the biomechanics of the human neck under inertial “noncontact” type forces. This study was designed to develop a comprehensive methodology to induce these loads. A minisled pendulum experimental setup was designed to test specimens (such as human cadaver neck) at subfailure or failure levels under different loading modalities including flexion, extension, and lateral bending. The system allows acceleration/deceleration input with varying wave form shapes. The test setup dynamically records the input and output strength information such as forces, accelerations, moments, and angular velocities; it also has the flexibility to obtain the temporal overall and local kinematic data of the cervical spine components at every vertebral level. These data will permit a complete biomechanical structural analysis. In this paper, the feasibility of the methodology is demonstrated by subjecting a human cadaver head-neck complex with intact musculature and skin under inertial flexion and extension whiplash loading at two velocities.

APA, Harvard, Vancouver, ISO, and other styles

25

Wilkinson, Holly N., and Matthew J. Hardman. "A role for estrogen in skin ageing and dermal biomechanics." Mechanisms of Ageing and Development 197 (July 2021): 111513. http://dx.doi.org/10.1016/j.mad.2021.111513.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Sree, Vivek D., Arezoo Ardekani, Pavlos Vlachos, and Adrian Buganza Tepole. "The biomechanics of autoinjector-skin interactions during dynamic needle insertion." Journal of Biomechanics 134 (March 2022): 110995. http://dx.doi.org/10.1016/j.jbiomech.2022.110995.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Blackstone, Britani N., and Heather M. Powell. "Morphogenesis and Biomechanics of Engineered Skin Cultured Under Uniaxial Strain." Advances in Wound Care 1, no. 2 (April 2012): 69–74. http://dx.doi.org/10.1089/wound.2011.0345.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Yamamoto, Ei, Yusuke Susaki, Shingo Nishi, Kumiko Takemori, and Hiroyuki Ito. "GS1-8 BIOMECHANICAL AND HISTOLOGICAL CHANGES IN ULTRAVIOLET-IRRADIATED SKIN TISSUES DUE TO THE EXTERNAL APPLICATION OF ELASTIN(GS1: Cell and Tissue Biomechanics II)." Proceedings of the Asian Pacific Conference on Biomechanics : emerging science and technology in biomechanics 2015.8 (2015): 122. http://dx.doi.org/10.1299/jsmeapbio.2015.8.122.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Chanda, Arnab, and Weston Upchurch. "Biomechanical Modeling of Wounded Skin." Journal of Composites Science 2, no. 4 (December 14, 2018): 69. http://dx.doi.org/10.3390/jcs2040069.

Full text

Abstract:

Skin injury is the most common type of injury, which manifests itself in the form of wounds and cuts. A minor wound repairs itself within a short span of time. However, deep wounds require adequate care and sometime clinical interventions such as surgical suturing for their timely closure and healing. In literature, mechanical properties of skin and other tissues are well known. However, the anisotropic behavior of wounded skin has not been studied yet, specifically with respect to localized overstraining and possibilities of rupture. In the current work, the biomechanics of common skin wound geometries were studied with a biofidelic skin phantom, using uniaxial mechanical testing and Digital Image Correlation (DIC). Global and local mechanical properties were investigated, and possibilities of rupture due to localized overstraining were studied across different wound geometries and locations. Based on the experiments, a finite element (FE) model was developed for a common elliptical skin wound geometry. The fidelity of this FE model was evaluated with simulation of uniaxial tension tests. The induced strain distributions and stress-stretch responses of the FE model correlated very well with the experiments (R2 > 0.95). This model would be useful for prediction of the mechanical response of common wound geometries, especially with respect to their chances of rupture due to localized overstraining. This knowledge would be indispensable for pre-surgical planning, and also in robotic surgeries, for selection of appropriate wound closure techniques, which do not overstrain the skin tissue or initiate tearing.

APA, Harvard, Vancouver, ISO, and other styles

30

Manfredi, Louise R., Hannes P. Saal, Kyler J. Brown, Mark C. Zielinski, John F. Dammann, Vicky S. Polashock, and Sliman J. Bensmaia. "Natural scenes in tactile texture." Journal of Neurophysiology 111, no. 9 (May 1, 2014): 1792–802. http://dx.doi.org/10.1152/jn.00680.2013.

Full text

Abstract:

Sensory systems are designed to extract behaviorally relevant information from the environment. In seeking to understand a sensory system, it is important to understand the environment within which it operates. In the present study, we seek to characterize the natural scenes of tactile texture perception. During tactile exploration complex high-frequency vibrations are elicited in the fingertip skin, and these vibrations are thought to carry information about the surface texture of manipulated objects. How these texture-elicited vibrations depend on surface microgeometry and on the biomechanical properties of the fingertip skin itself remains to be elucidated. Here we record skin vibrations, using a laser-Doppler vibrometer, as various textured surfaces are scanned across the finger. We find that the frequency composition of elicited vibrations is texture specific and highly repeatable. In fact, textures can be classified with high accuracy on the basis of the vibrations they elicit in the skin. As might be expected, some aspects of surface microgeometry are directly reflected in the skin vibrations. However, texture vibrations are also determined in part by fingerprint geometry. This mechanism enhances textural features that are too small to be resolved spatially, given the limited spatial resolution of the neural signal. We conclude that it is impossible to understand the neural basis of texture perception without first characterizing the skin vibrations that drive neural responses, given the complex dependence of skin vibrations on both surface microgeometry and fingertip biomechanics.

APA, Harvard, Vancouver, ISO, and other styles

31

XU, F., T. J. LU, and K. A. SEFFEN. "EFFECT OF THERMAL DAMAGE ON COMPRESSIVE BEHAVIOR OF SKIN TISSUE." Journal of Mechanics in Medicine and Biology 09, no. 01 (March 2009): 81–104. http://dx.doi.org/10.1142/s0219519409002882.

Full text

Abstract:

Biothermomechanics of skin tissue is highly interdisciplinary, involving bioheat transfer, burn damage, biomechanics and physiology. Characterization of the thermomechanical behavior of skin tissue is of great importance and can contribute to a variety of medical applications. However, few studies have attempted to address the influence of heat induced thermal damage on the mechanical properties of skin tissue. This paper presents the compressive behavior of pigskin at different thermal damage levels and discusses the possible mechanisms of thermal damage–dependent compressive behavior of skin. The results demonstrate that skin stiffness decreases with increasing thermal damage degree and there exists strain rate sensitivity at different damage levels, caused mainly by hydration changes.

APA, Harvard, Vancouver, ISO, and other styles

32

Chu, Shin Ying, and Steven M. Barlow. "Orofacial Biomechanics and Speech Motor Control." Perspectives on Speech Science and Orofacial Disorders 19, no. 1 (July 2009): 37–43. http://dx.doi.org/10.1044/ssod19.1.37.

Full text

Abstract:

Abstract The mechanical properties (e.g., mass, stiffness, viscoelasticity) of bone, cartilage, muscle, tendon, ligament, fat, and skin among articulatory subsystems involved in speech and gesture collectively influence all aspects of movement and must be accounted for in the selection and sequencing of motor program elements. Damage or disease processes affecting peripheral or central nervous system function, or both, can affect muscle coordination and alter muscle stiffness. Therefore, the biomechanics of orofacial and vocal tract structures should be taken into account when considering the movement patterns and network signaling in the neuromotor control system in health and disease. The purpose of this report is to summarize our evolving approach to and application of orofacial biomechanics in the context of movement disorders associated with dysarthria and craniofacial anomalies. We describe a new application for mapping stiffness in the lips for clinical application in pediatric and adult populations.

APA, Harvard, Vancouver, ISO, and other styles

33

Wang, Qi, and Vincent Hayward. "In vivo biomechanics of the fingerpad skin under local tangential traction." Journal of Biomechanics 40, no. 4 (January 2007): 851–60. http://dx.doi.org/10.1016/j.jbiomech.2006.03.004.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

LIANG, XING, VASILICA CRECEA, and STEPHEN A. BOPPART. "DYNAMIC OPTICAL COHERENCE ELASTOGRAPHY: A REVIEW." Journal of Innovative Optical Health Sciences 03, no. 04 (October 2010): 221–33. http://dx.doi.org/10.1142/s1793545810001180.

Full text

Abstract:

With the development of optical coherence tomography, the application optical coherence elastography (OCE) has gained more and more attention in biomechanics for its unique features including micron-scale resolution, real-time processing, and non-invasive imaging. In this review, one group of OCE techniques, namely dynamic OCE, are introduced and discussed including external dynamic OCE mapping and imaging of ex vivo breast tumor, external dynamic OCE measurement of in vivo human skin, and internal dynamic OCE including acoustomotive OCE and magnetomotive OCE. These techniques overcame some of the major drawbacks of traditional static OCE, and broadened the OCE application fields. Driven by scientific needs to engineer new quantitative methods that utilize the high micron-scale resolution achievable with optics, results of biomechanical properties were obtained from biological tissues. The results suggest potential diagnostic and therapeutic clinical applications. Results from these studies also help our understanding of the relationship between biomechanical variations and functional tissue changes in biological systems.

APA, Harvard, Vancouver, ISO, and other styles

35

Drabovskiy, V. S., N. R. Kerbazh, A. K. Akeyshi, and Ya V. Rybalka. "ANATOMICAL BASIS OF BIOMECHANICAL PROPERTIES OF SUPERFICIAL TISSUES OF THE ANTERIOR ABDOMINAL WALL." Актуальні проблеми сучасної медицини: Вісник Української медичної стоматологічної академії 20, no. 4 (December 30, 2020): 198–203. http://dx.doi.org/10.31718/2077-1096.20.4.198.

Full text

Abstract:

Biomechanics is a science that studies the mechanical properties of tissues, individual organs and systems and the body as a whole. The unique mechanical properties of the skin provide the function of support and protection of internal organs through the skin mobility and elasticity. This feature of the skin is determined by its microstructural organization and arrangement of connective tissue fibres. The mechanical properties of the skin are mainly determined by the collagen-rich dermis. The mechanics of the dermis, in turn, depends on the structure, density and direction of collagen fibres. Each biological tissue is able to acquire deformation properties i.e. stretching or contraction. At each stage of deformation in the tissues of different topographic and anatomical areas there are changes in histoarchitectonics (within the plastic characteristics, and outside these parameters). Different structural interactions are expressed by different mechanical factors, which are adequate to the magnitude and direction of tensile forces (deformation vectors), form the typical features of the connective tissue matrix of abdominal wall tissues. Normalization of the direction of tissue stress vectors, uniform distribution of the direction and force of deformation prevent microstructural rearrangement of the surface tissues of the abdominal wall. Dynamic changes in the histological structure and biomechanical behaviour of the skin are closely related to the aging process, hormonal background, mechanical factors: physiological stretching of the skin during rapid growth in adolescence, pregnancy, overweight (or rapid weight loss), under the influence of physical load and wound healing. All these factors lead to connective tissue remodelling. Thus, the skin has a complex three-dimensional morphological structure; it is subjected to prolonged exposure to internal and external factors that determines its mechanical properties.

APA, Harvard, Vancouver, ISO, and other styles

36

Halo, Tomáš, Karel Frydrýšek, Daniel Čepica, Michal Kopelent, František Fojtík, and Leopold Pleva. "Biomechanics – Experimental Determination of Critical Force Needed for Cannula to be Torn out." Strojnícky časopis - Journal of Mechanical Engineering 69, no. 3 (November 1, 2019): 51–60. http://dx.doi.org/10.2478/scjme-2019-0029.

Full text

Abstract:

AbstractThe aim of this paper is to determinate critical (tearing) force. This force is needed to be caused, for cannula and its securing fixation (in this case by tapes), to be torn out from patient’s body, (i.e. applications in medico-chirurgical branches). To determine this quantity, experimental approach was used, in which for more realistic approach real human cutis (skin) was used. Data acquired from this experiment may be later used in designing of a device for automatic winding of infusion tubes etc. Measurements were performed on porcine and human skin.

APA, Harvard, Vancouver, ISO, and other styles

37

Pensalfini, M., M. Rotach, R. Hopf, A. Bielicki, R. Santoprete, and E. Mazza. "How cosmetic tightening products modulate the biomechanics and morphology of human skin." Acta Biomaterialia 115 (October 2020): 299–316. http://dx.doi.org/10.1016/j.actbio.2020.08.027.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Tripathy, Satyaswarup, Devi Prasad Mohapatra, Friji Meethale Thiruvoth, Ramesh Kumar Sharma, Likhitha Reddy, and Neljo Thomas. "An Innovative Skin Simulation Model to Augment Competency-based Training in Facial Plastic Surgery." Indian Journal of Plastic Surgery 55, no. 01 (February 2022): 102–6. http://dx.doi.org/10.1055/s-0041-1740083.

Full text

Abstract:

Abstract Introduction Competency-based medical education (CBME) approach in the medical curriculum has been introduced globally with the goal of providing flexibility, accountability, and learner-centeredness among medical learners. Traditional surgical skill training in most places has relied on “see one, do one, teach one model,” while simulation model-based training has been shown to improve competencies in surgical trainees. We wanted to assess the usefulness of a hydrophilic barrier adhesive foam wound dressing as a novel skin simulation model for learning biomechanics and practice of cutaneous flaps among plastic surgical resident trainees at our institute. Materials and Methods An absorbent, soft polyurethane foam pad located centrally upon a larger polyurethane membrane, coated with a hydrocolloid adhesive, forming an island dressing, was used as a simulation model for this study. It was obtained from the hospital store either after or nearing their expiry dates of clinical use. Plastic surgery residents in different years of training were invited to participate in a simulation workshop, using this novel model, and give their feedback. Results Seventeen residents in different plastic surgery training levels participated in the workshop and gave their feedback on the skin flap simulation model. The simulation model received extremely high (100%) scores on two parameters, namely, utility for flap and suture practice and high scores (88%–94%) for texture, ability to mark, and improving confidence among trainees. Conclusions Adhesive bilayer polyurethane foam can be used as a novel cutaneous skin flap simulation model for understanding the biomechanics of skin flaps and cutaneous flap practice.

APA, Harvard, Vancouver, ISO, and other styles

39

Deng, James Makol Madut, and Oluwole Daniel Makinde. "Biomechanics of Surface Runoff and Soil Water Percolation." Defect and Diffusion Forum 401 (May 2020): 36–46. http://dx.doi.org/10.4028/www.scientific.net/ddf.401.36.

Full text

Abstract:

In this study, the complex interaction of surface runoff with the biomechanics of soil water transport and heat transfer rate is theoretically investigated using a mathematical model that relies on the two phase flows of an incompressible Newtonian fluid (stormwater) within the soil (porous medium) and on the soil surface (runoff). The flow and heat transfer characteristics within the soil are determined numerically based on Darcy-Brinkman-Forchheimer model for porous medium coupled with the appropriate energy equation while analytical approach is employed to tackle the model for interacting surface runoff stormwater. The effects of various embedded biophysical parameters on the temperature distribution and stormwater transport within the soil and across the soil surface together with soil-runoff interface skin friction and Nusselt number are display graphically and discussed quantitatively. It is found that an increase in surface runoff over tightly packed soil lessens stormwater percolation rate but enhances both soil erosion and surface heat transfer rate.

APA, Harvard, Vancouver, ISO, and other styles

40

Chin, Michael S., Brian B. Freniere, Sami Fakhouri, John E. Harris, Janice F. Lalikos, and Alfred J. Crosby. "Cavitation Rheology as a Potential Method for In Vivo Assessment of Skin Biomechanics." Plastic and Reconstructive Surgery 131, no. 2 (February 2013): 303e—305e. http://dx.doi.org/10.1097/prs.0b013e318278d79f.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

Lynch, Barbara, Stéphane Bancelin, Christelle Bonod-Bidaud, Jean-Baptiste Gueusquin, Florence Ruggiero, Marie-Claire Schanne-Klein, and Jean-Marc Allain. "A novel microstructural interpretation for the biomechanics of mouse skin derived from multiscale characterization." Acta Biomaterialia 50 (March 2017): 302–11. http://dx.doi.org/10.1016/j.actbio.2016.12.051.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

Pernodet, N., and D. Layman. "537 Biomechanics & periorbital aging: Impact of constant skin micro-movements on cellular responses." Journal of Investigative Dermatology 137, no. 5 (May 2017): S93. http://dx.doi.org/10.1016/j.jid.2017.02.558.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Maitra, Prithwiraj, and John Brahms. "Challenges in Cosmetic Formulations: Appearance, Long Wear, and Comfort." MRS Bulletin 32, no. 10 (October 2007): 787–92. http://dx.doi.org/10.1557/mrs2007.165.

Full text

Abstract:

AbstractCosmetics are products that are designed to maintain or improve visual appearance when applied to skin. Skin is a mechanically flexible substrate that changes in chemical and surface properties during the course of the day. Sebum (an oily substance secreted by the sebaceous glands) and perspiration (a secretion of mostly salt water by the eccrine glands) as well as environmental insults work counter to the desired benefits of cosmetics on physical appearance. Recent advances in the ability to control morphology and chemical properties have led to novel materials that in turn have enabled the development of cosmetics that provide, on the one hand, a more natural look, and on the other, unique and unprecedented visual effects. Progress in understanding skin biomechanics and surface properties lead to product formulations with unprecedented wear and performance characteristics. This article reviews recent advances in the ability to control the optical, bulk, and surface properties of materials, and their application to improved cosmetic formulations.

APA, Harvard, Vancouver, ISO, and other styles

44

Bargel, H., H. ‐C Spatz, T. Speck, and C. Neinhuis. "Two‐Dimensional Tension Tests in Plant Biomechanics ‐ Sweet Cherry Fruit Skin as a Model System." Plant Biology 6, no. 4 (July 2004): 432–39. http://dx.doi.org/10.1055/s-2004-821002.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Mahmud, J., S. L. Evans, and C. A. Holt. "An Innovative Tool to Measure Human Skin Strain Distribution in Vivo using Motion Capture and Delaunay Mesh." Journal of Mechanics 28, no. 2 (May 8, 2012): 309–17. http://dx.doi.org/10.1017/jmech.2012.34.

Full text

Abstract:

AbstractSkin has a complex structure and its deformation mechanics is still not well defined. In the study of skin biomechanics, the stretch ratio, λ, is an important property, which is determined using strain data. This paper attempts to develop a novel tool by integrating experimental-numerical approach to measure full-field strain distribution of human skin in vivo. Skin deformation in vivo was measured using motion capture system, (which is not a full-field measuring tool) and then by constructing finite elements, its full-field strain contour is produced. The experimental procedure starts by attaching a set of reflective markers onto the skin at the forearm of healthy volunteers. Skin deformation is induced by pulling a nylon filament attached with a loading tab. Three infrared cameras are used to capture the movement of markers during load application. QTM (Qualisys, Sweden) software is used to track markers trajectories and generate data consisting of 3-dimensional markers coordinate. The initial capture is set as the reference marker positions (undeformed skin) and the subsequent images represent the deformed skin relative to the initial. Representing markers as nodes, finite elements are constructed by adjoining three adjacent markers using Delaunay mesh. Strains were deduced from the strain displacement matrix and measured for three subjects at three loading directions. The results are in fair agreement with those obtained by others. The method and output provide a useful addition to understanding skin deformation.

APA, Harvard, Vancouver, ISO, and other styles

46

Zhou, Ying, Yuchao Fan, Zhi Chen, Zhilian Yue, and Gordon Wallace. "Catechol functionalized ink system and thrombin-free fibrin gel for fabricating cellular constructs with mechanical support and inner micro channels." Biofabrication 14, no. 1 (October 22, 2021): 015004. http://dx.doi.org/10.1088/1758-5090/ac2ef8.

Full text

Abstract:

Abstract The development of 3D bio printing technology has contributed to protocols for the repair and regeneration of tissues in recent years. However, it is still a great challenge to fabricate structures that mimic the complexity of native tissue, including both the biomechanics and microscale internal structure. In this study, a catechol functionalized ink system was developed to produce tough and elastic scaffolds with built-in micro channels that simulate the vascular structure. And a skin model was designed to evaluate the cytocompatibility of the scaffolds. The mechanical support stemmed from the double network based on catechol-hyaluronic acid (HACA) and alginate, the micro channels were generated using sacrificial gelatin. HACA/alginate and gelatin were firstly printed using a 3D extrusion printer. Thrombin-free fibrinogen were then mixed with human dermal fibroblasts and introduced to the printed scaffolds to induce gelation. An immortal human keratinocyte cell line was introduced on top of the cellular construct to mimic the full thickness skin structure. The printed scaffolds demonstrated high elasticity and supported the formation of a double-layered cell-laden skin like structure. The results suggest the 3D printing platform developed here provides a platform for skin regeneration and could be explored further to engineer functional skin tissue by incorporation of other types of cells.

APA, Harvard, Vancouver, ISO, and other styles

47

Dandekar, Kiran, Balasundar I. Raju, and Mandayam A. Srinivasan. "3-D Finite-Element Models of Human and Monkey Fingertips to Investigate the Mechanics of Tactile Sense." Journal of Biomechanical Engineering 125, no. 5 (October 1, 2003): 682–91. http://dx.doi.org/10.1115/1.1613673.

Full text

Abstract:

The biomechanics of skin and underlying tissues plays a fundamental role in the human sense of touch. It governs the mechanics of contact between the skin and an object, the transmission of the mechanical signals through the skin, and their transduction into neural signals by the mechanoreceptors. To better understand the mechanics of touch, it is necessary to establish quantitative relationships between the loads imposed on the skin by an object, the state of stresses/strains at mechanoreceptor locations, and the resulting neural response. Towards this goal, 3-D finite-element models of human and monkey fingertips with realistic external geometries were developed. By computing fingertip model deformations under line loads, it was shown that a multi-layered model was necessary to match previously obtained in vivo data on skin surface displacements. An optimal ratio of elastic moduli of the layers was determined through numerical experiments whose results were matched with empirical data. Numerical values of the elastic moduli of the skin layers were obtained by matching computed results with empirically determined force-displacement relationships for a variety of indentors. Finally, as an example of the relevance of the model to the study of tactile neural response, the multilayered 3-D finite-element model was shown to be able to predict the responses of the slowly adapting type I (SA-I) mechanoreceptors to indentations by complex object shapes.

APA, Harvard, Vancouver, ISO, and other styles

48

Silver, Frederick H., Nikita Kelkar, and Tanmay Deshmukh. "Molecular Basis for Mechanical Properties of ECMs: Proposed Role of Fibrillar Collagen and Proteoglycans in Tissue Biomechanics." Biomolecules 11, no. 7 (July 12, 2021): 1018. http://dx.doi.org/10.3390/biom11071018.

Full text

Abstract:

Collagen and proteoglycans work in unison in the ECM to bear loads, store elastic energy and then dissipate excess energy to avoid tissue fatigue and premature mechanical failure. While collagen fibers store elastic energy by stretching the flexible regions in the triple helix, they do so by lowering their free energy through a reduction in the entropy and a decrease in charge–charge repulsion. Entropic increases occur when the load is released that drive the reversibility of the process and transmission of excess energy. Energy is dissipated by sliding of collagen fibrils by each other with the aid of decorin molecules that reside on the d and e bands of the native D repeat pattern. Fluid flow from the hydration layer associated with the decorin and collagen fibrils hydraulically dissipates energy during sliding. The deformation is reversed by osmotic forces that cause fluid to reform a hydration shell around the collagen fibrils when the loads are removed. In this paper a model is presented describing the organization of collagen fibers in the skin and cell–collagen mechanical relationships that exist based on non-invasive measurements made using vibrational optical coherence tomography. It is proposed that under external stress, collagen fibers form a tensional network in the plane of the skin. Collagen fiber tension along with forces generated by fibroblasts exerted on collagen fibers lead to an elastic modulus that is almost uniform throughout the plane of the skin. Tensile forces acting on cells and tissues may provide a baseline for stimulation of normal mechanotransduction. We hypothesize that during aging, changes in cellular metabolism, cell–collagen interactions and light and UV light exposure cause down regulation of mechanotransduction and tissue metabolism leading to tissue atrophy.

APA, Harvard, Vancouver, ISO, and other styles

49

P Paul, Sharad. "Biodynamic Excisional Skin Tension (BEST) Lines: Revisiting Langer’s Lines, Skin Biomechanics, Current Concepts in Cutaneous Surgery, and the (lack of) Science behind Skin Lines used for Surgical Excisions." Journal of Dermatological Research 2, no. 1 (2017): 77–87. http://dx.doi.org/10.17554/j.issn.2413-8223.2017.02.19.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

SOMBRA, LUIS PIMENTEL, RICARDO TEIXEIRA E. SILVA, THIEGO PEDRO FREITAS ARAÚJO, OLAVO LETAIF BIRAGHI, RAPHAEL MARTUS MARCON, ALEXANDRE FOGAÇA CRISTANTE, and TARCÍSIO ELOY PESSOA DE BARROS FILHO. "TOMOGRAPHIC STUDY OF THE S2-ALAR-ILIAC SCREW TECHNIQUE IN BRAZILIAN MEN." Coluna/Columna 18, no. 3 (September 2019): 226–30. http://dx.doi.org/10.1590/s1808-185120191803196377.

Full text

Abstract:

ABSTRACT Objective The use of pedicle screws was a milestone for modern spinal surgery. This type of fixation, due to its superior biomechanics, gave greater fixation power, greater capacity to withstand the pulling forces and, therefore, greater stability and lower rates of pseudoarthrosis. Fixation of the lumbosacral junction, even with the development of these new implants, remains a challenge mainly because the considerable rates of pseudoarthrosis. The use of iliac screws solves the biomechanical difficulties. However, its use shows high rates of surgical wound problems. The S2-Alar-Iliac screw (S2AI) came as a solution to these complications. The lack of studies about anatomical and anthropometric parameters in the Brazilian population justifies the study. Methods Eleven hip tomographies of Brazilian adult males were analyzed by four evaluators. The right and left sides were considered. In each patient, measurements were made of greater and shorter bone length, greater and smaller bone diameter, distance from the entry point to the skin, sagittal and axial angles related to the hypothetical insertion of an S2AI screw and compared to the same measurements obtained with the iliac screw. Results The mean bone length was 136.7 mm, the greatest bone diameter was 24.8 mm, the smallest bone diameter was 19.7 mm and the distance from the screw to the skin was 42.1 mm for the S2AI screw. Conclusions The obtained data present an average of the sample that can be useful in the decision of the surgical technique in the studied group. Level of evidence I; Diagnostic Studies (Anatomical Investigation).

APA, Harvard, Vancouver, ISO, and other styles

Journal articles on the topic 'Skin biomechanics'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles