Experimental and numerical study on the mechanical behavior of the superficial layers of the face

Barbarino, G. C.; Jabareen, Mahmood; Mazza, Edoardo

doi:10.1111/j.1600-0846.2011.00515.x

Cited by 49 publications

(63 citation statements)

References 38 publications

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“…Skin hydration level, contributions of the specific skin layers, as well as the anisotropic and Current research on skin mechanics aims at capturing the above-mentioned properties and integrating them into theoretical/analytical [116,118,128] and numerical models (e.g. linear viscoelastic or hyperelastic models) [62,116,125,126,[137][138][139][140], previously validated for elastomers and polymers, to develop and implement improved and more realistic mechanical finite element models of human skin.…”

Section: Mechanical Properties Of Human Skinmentioning

confidence: 99%

Tribology of Skin: Review and Analysis of Experimental Results for the Friction Coefficient of Human Skin

2011

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In this review, we discuss the current knowledge on the tribology of human skin and present an analysis of the available experimental results for skin friction coefficients. Starting with an overview on the factors influencing the friction behaviour of skin, we discuss the up-to-date existing experimental data and compare the results for different anatomical skin areas and friction measurement techniques. For this purpose, we also estimated and analysed skin contact pressures applied during the various friction measurements. The detailed analyses show that substantial variations are a characteristic feature of friction coefficients measured for skin and that differences in skin hydration are the main cause thereof, followed by the influences of surface and material properties of the contacting materials. When the friction coefficients of skin are plotted as a function of the contact pressure, the majority of the literature data scatter over a wide range that can be explained by the adhesion friction model. The case of dry skin is reflected by relatively low and pressureindependent friction coefficients (greater than 0.2 and typically around 0.5), comparable to the dry friction of solids with rough surfaces. In contrast, the case of moist or wet skin is characterised by significantly higher (typically [1) friction coefficients that increase strongly with decreasing contact pressure and are essentially determined by the mechanical shear properties of wet skin. In several studies, effects of skin deformation mechanisms contributing to the total friction are evident from friction coefficients increasing with contact pressure. However, the corresponding friction coefficients still lie within the range delimited by the adhesion friction model. Further research effort towards the analysis of the microscopic contact area and mechanical properties of the upper skin layers is needed to improve our so far limited understanding of the complex tribological behaviour of human skin.

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Section: Mechanical Properties Of Human Skinmentioning

confidence: 99%

Tribology of Skin: Review and Analysis of Experimental Results for the Friction Coefficient of Human Skin

2011

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“…Based on our clinical experience, the most significant of these relate to the multiple confounding factors associated with individual techniques of probe placement [11]. Excluding humidity and temperature, the vast majority of studies fail to specifically control and discuss a majority of these important factors when using the Cutometer [1,2,[5][6][7][8][9][10]. Perhaps more importantly, it remains unclear what effect the majority of these confounding variables actually have on measurement variability.…”

Section: Introductionmentioning

confidence: 97%

“…Over the past 17 years, a number of clinicians and researchers [1][2][3][4][5][6][7][8][9][10] have been utilizing the Cutometer MPA 580 (Courage & Khazaka Electronic GmbH, Cologne, Germany). This device allows for a non-invasive assessment of the underlying biomechanics of the skin and other cutaneous tissue.…”

Section: Introductionmentioning

confidence: 99%

The effect of probe placement on inter-trial variability when using the Cutometer MPA 580

Bonaparte

Chung

2014

Journal of Medical Engineering & Technology

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There is limited data independently assessing the optimal use of the Cutometer MPA580. The purpose of this study is to test the hypothesis that the assessment of elastic recoil is significantly different when utilizing two different probe placement protocols. In protocol A, four trials were performed, in which the probe was removed from the skin between trials. In protocol B, the probe was not removed from the skin between trials. Fifty-four patients were enrolled and all completed the testing. When assessing elasticity (Ua/Uf), the inter-class correlation was 0.83 for protocol A and 0.48 for protocol B (p <0.001). There was no significant difference between individual trials for protocol A. Trial one of protocol B was significantly different (p < 0.001) than trials 2-4 for protocol B. Trial one of protocol B was not significantly different than any trial in protocol A. The results of this study suggest that the method in which a clinician performs repeated measure testing has a significant effect on the outcome measures when using the Cutometer. Removing the probe between trials appears to result in measures with higher reliability.

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“…Several different in-and ex-vivo measurement methods have been proposed in literature suitable for the assessment of individual tissues, tissue structures and the interaction of individual facial tissue layers. Barbarino et al applied suction experiments to evaluate skin and deeper layers [2]. Hendriks et al [6] present a combined suction based experimental and finite element (FE) modeling approach allowing to quantify the relative contribution of different skin layers (e.g.…”

Section: Introductionmentioning

confidence: 99%

Experimental Characterization and Simulation of Layer Interaction in Facial Soft Tissues

Weickenmeier

Lecomte‐Grosbras

et al. 2014

Biomedical Simulation

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Abstract. Anatomically detailed modeling of soft tissue structures such as the forehead plays an important role in physics based simulations of facial expressions, for surgery planning, and implant design. We present ultrasound measurements of through-layer tissue deformation in different regions of the forehead. These data were used to determine the local dependence of tissue interaction properties in terms of variations in the relative deformation between individual layers. A physically based finite element model of the forehead is developed and simulations are compared with measurements in order to validate local tissue interaction properties. The model is used for simulation of forehead wrinkling during frontalis muscle contraction.

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Experimental and numerical study on the mechanical behavior of the superficial layers of the face

Cited by 49 publications

References 38 publications

Tribology of Skin: Review and Analysis of Experimental Results for the Friction Coefficient of Human Skin

Tribology of Skin: Review and Analysis of Experimental Results for the Friction Coefficient of Human Skin

The effect of probe placement on inter-trial variability when using the Cutometer MPA 580

Experimental Characterization and Simulation of Layer Interaction in Facial Soft Tissues

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