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He W, Shen F, Xu Z, Pei B, Xie H, Li X. The effect of mesh orientation, defect location and size on the biomechanical compatibility of hernia mesh. Ing Rech Biomed 2023. [DOI: 10.1016/j.irbm.2023.100777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
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Tomaszewska A, Reznikov D. Combined numerical and experimental approach to determine numerical model of abdominal scaffold. Comput Methods Biomech Biomed Engin 2021; 25:1235-1248. [PMID: 34841994 DOI: 10.1080/10255842.2021.2005788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
A proper junction of the prosthesis and the abdominal wall is important in successful hernia repair. The number of tacks should be balanced to assure appropriate mesh fixation and not to induce post-operative pain. Numerical simulations help to find this balance. The study is aimed at creating a proper numerical model of a knitted surgical mesh subjected to boundary conditions and load occurring in the abdominal cavity. Continuous, anisotropic constitutive relation is considered to reflect the mesh behaviour. Different sets of material law parameters are determined on the basis of different bi-axial tests setups. Force- and displacement-controlled tests with different ratios are considered. Consequently, some numerical model variants are obtained featuring various reaction distributions in the scaffold fixation points. The proper variant is selected based on comparison of the position of maximal reaction force in the numerical model and in the reference physical model of operated hernia. Force-driven tests have shown anisotropic mesh behaviour, while equibiaxial displacement-driven test has demonstrated reduced anisotropic response. Within seven scenarios of constitutive parameters identification (based on single or combined experimental data), the equibiaxial force-controlled test appeared to produce the most relevant model to follow the prosthesis behaviour under pressure. The position of maximal reaction force in such model is similar to obtained in the physical hernia model. The equibiaxial force-driven test provides most suitable data for Gasser-Ogden-Holzapfel constitutive model identification of a considered surgical mesh to be used to model the mesh under pressure.
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Affiliation(s)
- Agnieszka Tomaszewska
- Department of Structural Mechanics, Faculty of Civil and Environmental Engineering, Gdańsk University of Technology, Gdańsk, Poland
| | - Daniil Reznikov
- Department of Structural Mechanics, Faculty of Civil and Environmental Engineering, Gdańsk University of Technology, Gdańsk, Poland
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García-García C, Carrascal-Morillo MT, Castell Gómez JT, Bernal Guerrero C, García Prada JC. An approach to evaluating and benchmarking the mechanical behavior of a surgical mesh prototype designed for the repair of abdominal wall defects. J Mech Behav Biomed Mater 2021; 125:104909. [PMID: 34736025 DOI: 10.1016/j.jmbbm.2021.104909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 09/16/2021] [Accepted: 10/12/2021] [Indexed: 10/20/2022]
Abstract
Ventral hernia repair is a common surgical procedure in abdominal surgery in which surgical mesh has become an essential tool to improve outcomes. To avoid recurrences the mesh needs to mimic the mechanical behavior of the abdominal wall. In this scenario the mechanical properties at the interface between the mesh and its surrounding tissue is critical for the performance of the device and, therefore, the success after surgery. We aimed to characterize and compare the mechanical behavior of the patented prototype mesh Spider and four commercial meshes at the mesh-tissue interface. The prototype mesh was designed based on the hypothesis that the best performance for a large-sized defect in a ventral hernia is obtained when the mesh presents an isotropic behavior. In contrast, commercial meshes presented significant anisotropic behavior. Mechanical properties of the meshes were characterized through uniaxial tensile tests. Longitudinal and transverse axes were defined for each mesh, and samples were cut in each axis orientation. Samples underwent uniaxial tensile testing, from which the elastic modulus in each axis was determined. The degree of anisotropy was calculated as the ratio between the elastic modulus in each axis. An in silico model of the ventral hernia defect was designed to simulate the mesh-tissue interface behavior via finite element method. Meshes were modeled by an hyperelastic orthotropic constitutive model, which allowed isotropic symmetry as particular case for the prototype mesh. Abdominal wall was modeled using a Neo-Hookean model. Once the simulations were launched, mesh-tissue interface behavior was evaluated through the difference between Von Mises stress values on either size of the interface, both on the external and the internal face of the mesh and abdominal wall. Mechanical response was anisotropic for all commercial meshes and isotropic for the Spider prototype. Among commercial, Ultrapro® was highly anisotropic. Tests revealed Gore-Tex® to be the stiffest, followed by Repol Angimesh®, Spider and Ultrapro®; Duramesh™ was found to be the most compliant. Concerning mesh-tissue behavior, simulation results revealed the Spider prototype and Duramesh™ to be the best; Spider due to its uniformity and lower stress difference thanks to its nearly isotropic behavior, and Duramesh™ due to its compliant behavior. Our results suggest that the compromise between stiffness and anisotropy must be considered in order to improve the mechanical performance of the meshes, bearing in mind that for large-sized ventral defects, nearly isotropic mesh ensures better performance.
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Affiliation(s)
- C García-García
- PhD Programme in Industrial Engineering Technologies, International PhD School (EIDUNED), The National Distance Education University (UNED), Madrid, Spain.
| | - M T Carrascal-Morillo
- Department of Mechanics, ETSI Industriales, The National Distance Education University (UNED), Madrid, Spain
| | | | - C Bernal Guerrero
- Department of Construction and Manufacturing Engineering , ETSI Industriales, The National Distance Education University (UNED), Madrid, Spain
| | - J C García Prada
- Department of Mechanics, ETSI Industriales, The National Distance Education University (UNED), Madrid, Spain
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Kallinowski F, Ludwig Y, Löffler T, Vollmer M, Lösel PD, Voß S, Görich J, Heuveline V, Nessel R. Biomechanics applied to incisional hernia repair - Considering the critical and the gained resistance towards impacts related to pressure. Clin Biomech (Bristol, Avon) 2021; 82:105253. [PMID: 33401197 DOI: 10.1016/j.clinbiomech.2020.105253] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 12/07/2020] [Accepted: 12/18/2020] [Indexed: 02/07/2023]
Abstract
BACKGROUND Incisional hernia repair is burdened with recurrence, pain and disability. The repair is usually carried out with a textile mesh fixed between the layers of the abdominal wall. METHODS We developed a bench test with low cyclic loading. The test uses dynamic intermittent strain resembling coughs. We applied preoperative computed tomography of the abdomen at rest and during Valsalva's maneuver to the individual patient to analyze tissue elasticity. FINDINGS The mesh, its placements and overlap, the type and distribution of fixation elements, the elasticity of the tissue of the individual and the closure of the abdominal defect-all aspects influence the reconstruction necessary. Each influence can be attributed to a relative numerical quantity which can be summed up into a characterizing value. The elasticity of the tissues within the abdominal wall of the individual patient can be assessed with low-dose computed tomography of the abdomen with Valsalva's maneuver. We established a procedure to integrate the results into a surgical concept. We demonstrate potential computer algorithms using non-rigid b-spline registration and artificial intelligence to further improve the evaluation process. INTERPRETATION The bench test yields relative values for the characterization of hernia, mesh and fixation. It can be applied to patient care using established procedures. The clinical application in the first ninety-six patients shows no recurrences and reduced pain levels after one year. The concept has been spread to other surgical groups with the same results in another fifty patients. Future efforts will make the abdominal wall reconstruction more predictable.
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Affiliation(s)
- F Kallinowski
- General, Visceral and Transplantation Surgery, University Hospital Heidelberg, Im Neuenheimer Feld 420, 69120 Heidelberg, Germany; General and Visceral Surgery, GRN Hospital Eberbach, Scheuerbergstrasse 3, 69412 Eberbach, Germany.
| | - Y Ludwig
- General, Visceral and Transplantation Surgery, University Hospital Heidelberg, Im Neuenheimer Feld 420, 69120 Heidelberg, Germany
| | - T Löffler
- General and Visceral Surgery, GRN Hospital Eberbach, Scheuerbergstrasse 3, 69412 Eberbach, Germany
| | - M Vollmer
- Hamburg University of Technology, Biomechanics, Denickestrasse 15, 21073 Hamburg, Germany
| | - P D Lösel
- Engineering Mathematics and Computing Lab (EMCL), Interdisciplinary Center for Scientific Computing, Im Neuenheimer Feld 205, 69120 Heidelberg, Germany; Heidelberg Institute for Theoretical Studies (HITS), Schloss-Wolfsbrunnenweg 35, 69118 Heidelberg, Germany
| | - S Voß
- Department of Fluid Dynamics and Technical Flows, Otto-von-Guericke-Universität Magdeburg, Universitätsplatz 2, 39106 Magdeburg, Germany; Research Campus STIMULATE, Otto-von-Guericke-Universität Magdeburg, Universitätsplatz 2, 39106 Magdeburg, Germany
| | - J Görich
- Radiological Center, Kellereistrasse 32-34, 69412 Eberbach, Germany
| | - V Heuveline
- Engineering Mathematics and Computing Lab (EMCL), Interdisciplinary Center for Scientific Computing, Im Neuenheimer Feld 205, 69120 Heidelberg, Germany; Heidelberg Institute for Theoretical Studies (HITS), Schloss-Wolfsbrunnenweg 35, 69118 Heidelberg, Germany; Heidelberg University Computing Centre (URZ), Im Neuenheimer Feld 293, 69120 Heidelberg, Germany
| | - R Nessel
- General, Visceral and Pediatric Surgery, Klinikum Am Gesundbrunnen, Am Gesundbrunnen 20-26, s Heilbronn, Germany
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Pierrat B, Nováček V, Avril S, Turquier F. Mechanical characterization and modeling of knitted textile implants with permanent set. J Mech Behav Biomed Mater 2020; 114:104210. [PMID: 33338783 DOI: 10.1016/j.jmbbm.2020.104210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 11/09/2020] [Accepted: 11/11/2020] [Indexed: 10/22/2022]
Abstract
Textile-based implant (mesh) treatment is considered as a standard of care for abdominal wall hernia repair. Computational models and simulations have appeared as one of the most promising approach to investigate biomechanics related to hernia repair and to improve clinical outcomes. This paper presents a novel anisotropic hypo-elastoplastic constitutive model specifically established for surgical knitted textile implants. The major mechanical characteristics of these materials such as anisotropy and permanent set have been reproduced. For the first time ever, we report an extensive mechanical characterization of one of these meshes, including cyclic uniaxial tension, planar equibiaxial tension and plunger type testing. These tests highlight the complex mechanical behavior with strong nonlinearity, anisotropy and permanent set. The novel anisotropic hypo-elasto-plastic constitutive model has been identified based on the tensile experiments and validated successfully against the data of the plunger experiment. In the future, implementation of this characterization and modeling approach to additional surgical knitted textiles should be the direction to follow in order to develop clinical decision support software for abdominal wall repair.
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Affiliation(s)
- Baptiste Pierrat
- Mines Saint-Etienne, Univ Lyon, Univ Jean Monnet, INSERM, U 1059 Sainbiose, Centre CIS, F - 42023, Saint-Etienne, France.
| | - Vít Nováček
- New Technologies - Research Centre, University of West Bohemia, Univerzitní 8, 301 00, Plzeň, Czech Republic
| | - Stéphane Avril
- Mines Saint-Etienne, Univ Lyon, Univ Jean Monnet, INSERM, U 1059 Sainbiose, Centre CIS, F - 42023, Saint-Etienne, France
| | - Frédéric Turquier
- Mines Saint-Etienne, Univ Lyon, Univ Jean Monnet, INSERM, U 1059 Sainbiose, Centre CIS, F - 42023, Saint-Etienne, France
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A numerical method for guiding the design of surgical meshes with suitable mechanical properties for specific abdominal hernias. Comput Biol Med 2020; 116:103531. [DOI: 10.1016/j.compbiomed.2019.103531] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Revised: 10/18/2019] [Accepted: 11/04/2019] [Indexed: 11/19/2022]
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Todros S, de Cesare N, Pianigiani S, Concheri G, Savio G, Natali AN, Pavan PG. 3D surface imaging of abdominal wall muscular contraction. COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE 2019; 175:103-109. [PMID: 31104699 DOI: 10.1016/j.cmpb.2019.04.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Revised: 04/10/2019] [Accepted: 04/11/2019] [Indexed: 06/09/2023]
Abstract
BACKGROUND AND OBJECTIVE The biomechanical analysis of the abdominal wall should take into account muscle activation and related phenomena, such as intra-abdominal pressure variation and abdomen surface deformation. The geometry of abdominal surface and its deformation during contraction have not been extensively characterized, while represent a key issue to be investigated. METHODS In this work, the antero-lateral abdominal wall surface of ten healthy volunteers in supine position is acquired via laser scanning in relaxed conditions and during abdominal muscles contraction, repeating each acquisition six times. The average relaxed and contracted abdominal surfaces are compared for each subject and displacements measured. RESULTS Muscular activation induces raising in the region adjacent to linea alba along the posterior-anterior direction and a simultaneous lowering along lateral-medial direction of the abdominal wall sides. Displacements reach a maximum value of 12.5 mm for the involved subjects. The coefficient of variation associated to the abdomen surface measurements in the same configuration (relaxed or contracted) is below 0.75%. Non-parametric Mann-Whitney U test highlights that the differences between relaxed and contracted abdominal wall surfaces are significant (p < 0.01). CONCLUSIONS Laser scanning is an accurate and reliable method to evaluate surface changes on the abdominal wall during muscular contraction. The results of this experimental activity can be useful to validate numerical models aimed at describing abdominal wall biomechanics.
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Affiliation(s)
- Silvia Todros
- Department of Industrial Engineering, Centre for Mechanics of Biological Materials, University of Padova, Padova, Italy
| | - Niccolò de Cesare
- Department of Industrial Engineering, Centre for Mechanics of Biological Materials, University of Padova, Padova, Italy.
| | - Silvia Pianigiani
- Department of Industrial Engineering, Centre for Mechanics of Biological Materials, University of Padova, Padova, Italy
| | - Gianmaria Concheri
- Department of Civil, Environmental and Architectural Engineering, Laboratory of Design Tools and Methods in Industrial Engineering, University of Padova, Padova, Italy
| | - Gianpaolo Savio
- Department of Civil, Environmental and Architectural Engineering, Laboratory of Design Tools and Methods in Industrial Engineering, University of Padova, Padova, Italy
| | - Arturo N Natali
- Department of Industrial Engineering, Centre for Mechanics of Biological Materials, University of Padova, Padova, Italy
| | - Piero G Pavan
- Department of Industrial Engineering, Centre for Mechanics of Biological Materials, University of Padova, Padova, Italy
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Grebenik EA, Istranov LP, Istranova EV, Churbanov SN, Shavkuta BS, Dmitriev RI, Veryasova NN, Kotova SL, Kurkov AV, Shekhter AB, Timashev PS. Chemical cross‐linking of xenopericardial biomeshes: A bottom‐up study of structural and functional correlations. Xenotransplantation 2019; 26:e12506. [DOI: 10.1111/xen.12506] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Revised: 01/07/2019] [Accepted: 01/29/2019] [Indexed: 01/23/2023]
Affiliation(s)
- Ekaterina A. Grebenik
- Institute for Regenerative Medicine Sechenov First Moscow State Medical University Moscow Russia
| | - Leonid P. Istranov
- Institute for Regenerative Medicine Sechenov First Moscow State Medical University Moscow Russia
| | - Elena V. Istranova
- Institute for Regenerative Medicine Sechenov First Moscow State Medical University Moscow Russia
| | - Semyon N. Churbanov
- Institute for Regenerative Medicine Sechenov First Moscow State Medical University Moscow Russia
- Research Center “Crystallography and Photonics” Institute of Photonic Technologies, Russian Academy of Sciences Moscow Russia
| | - Boris S. Shavkuta
- Institute for Regenerative Medicine Sechenov First Moscow State Medical University Moscow Russia
- Research Center “Crystallography and Photonics” Institute of Photonic Technologies, Russian Academy of Sciences Moscow Russia
| | - Ruslan I. Dmitriev
- School of Biochemistry and Cell Biology University College Cork Cork Ireland
| | - Nadezhda N. Veryasova
- Institute for Regenerative Medicine Sechenov First Moscow State Medical University Moscow Russia
| | - Svetlana L. Kotova
- Research Center “Crystallography and Photonics” Institute of Photonic Technologies, Russian Academy of Sciences Moscow Russia
| | - Alexander V. Kurkov
- Institute for Regenerative Medicine Sechenov First Moscow State Medical University Moscow Russia
| | - Anatoly B. Shekhter
- Institute for Regenerative Medicine Sechenov First Moscow State Medical University Moscow Russia
| | - Peter S. Timashev
- Institute for Regenerative Medicine Sechenov First Moscow State Medical University Moscow Russia
- Research Center “Crystallography and Photonics” Institute of Photonic Technologies, Russian Academy of Sciences Moscow Russia
- Department of Polymers and Composites N.N.Semenov Institute of Chemical Physics Moscow Russia
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Abstract
INTRODUCTION Today the use of textile meshes has become a standard for the treatment of abdominal wall hernias and for the reinforcement of any tissue repair as the strength of the implant decreases the recurrence rates. With increasing use, side effects of the textile implants became apparent, as well. AREAS COVERED Based on publications in Medline over the past decade, general and specific benefits, as well as risks, are discussed with the challenge to define individual risk-benefit ratios. For meshes, certain high-risk or low-risk conditions can be defined. In an attempt to eliminate mesh-related risks, quality control for medical devices has meanwhile been revised. In both the USA and the EU post-market surveillance studies are required to keep medical devices approved. EXPERT COMMENTARY The impact of material on the complication rate will vary depending on the patient's co-morbidity or the risks of the procedure. Even the best material can end up with disappointing results in case of poor healing or poor surgery. On the other hand, when using high-risk devices, most of the complications after excellent surgery with excellent indication can be supposed to be mesh-related. Thus, the use of low-risk devices is recommended even though its advantage may not be demonstrable in clinical studies.
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Affiliation(s)
- Uwe Klinge
- a Department of General , Visceral and Transplant Surgery at the University Hospital of the RWTH Aachen , Aachen , Germany
| | - Bernd Klosterhalfen
- b Department of Pathology , Institute for Pathology at the Düren Hospital , Düren , Germany
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Computational modeling of abdominal hernia laparoscopic repair with a surgical mesh. Int J Comput Assist Radiol Surg 2017; 13:73-81. [DOI: 10.1007/s11548-017-1681-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Accepted: 10/20/2017] [Indexed: 11/25/2022]
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Deeken CR, Lake SP. Mechanical properties of the abdominal wall and biomaterials utilized for hernia repair. J Mech Behav Biomed Mater 2017; 74:411-427. [DOI: 10.1016/j.jmbbm.2017.05.008] [Citation(s) in RCA: 88] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2017] [Revised: 04/26/2017] [Accepted: 05/04/2017] [Indexed: 12/29/2022]
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12
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Todros S, Pachera P, Pavan PG, Natali AN. Investigation of the Mechanical Behavior of Polyester Meshes for Abdominal Surgery: A Preliminary Study. J Med Biol Eng 2017. [DOI: 10.1007/s40846-017-0337-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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13
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Prostheses size dependency of the mechanical response of the herniated human abdomen. Hernia 2016; 20:839-848. [DOI: 10.1007/s10029-016-1525-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Accepted: 07/29/2016] [Indexed: 10/21/2022]
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Grasa J, Sierra M, Lauzeral N, Muñoz M, Miana-Mena F, Calvo B. Active behavior of abdominal wall muscles: Experimental results and numerical model formulation. J Mech Behav Biomed Mater 2016; 61:444-454. [DOI: 10.1016/j.jmbbm.2016.04.013] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Revised: 03/29/2016] [Accepted: 04/06/2016] [Indexed: 10/22/2022]
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Todros S, Pavan PG, Pachera P, Natali AN. Synthetic surgical meshes used in abdominal wall surgery: Part II-Biomechanical aspects. J Biomed Mater Res B Appl Biomater 2015; 105:892-903. [PMID: 26687728 DOI: 10.1002/jbm.b.33584] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Revised: 10/26/2015] [Accepted: 11/18/2015] [Indexed: 01/29/2023]
Abstract
This work reports the second part of a review on synthetic surgical meshes used for abdominal hernia repair. While material and structural characteristics, together with mesh-tissue interaction, were considered in a previous article (Part I), biomechanical behavior is described here in more detail. The role of the prosthesis is to strengthen the impaired abdominal wall, mimicking autologous tissue without reducing its compliance. Consequently, mesh mechanical properties play a crucial role in a successful surgical repair. The main available techniques for mechanical testing, such as uniaxial and biaxial tensile testing, ball burst, suture retention strength, and tear resistance testing, are described in depth. Among these methods, the biaxial tensile test is the one that can more faithfully reproduce the physiological loading condition. An outline of the most significant results documented in the literature is reported, showing the variety of data on mesh mechanical properties. Synthetic surgical meshes generally follow a non-linear stress-strain behavior, with mechanical characteristics dependant on test direction due to mesh anisotropy. Ex-vivo tests revealed an increased stiffness in mesh explants due to the gradual ingrowth of the host tissue after implant. In general, the absence of standardization in test methods and terminology makes it difficult to compare results from different studies. Numerical models of the abdominal wall interacting with surgical meshes were also discussed representing a potential tool for the selection of suitable prostheses. © 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 105B: 892-903, 2017.
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Affiliation(s)
- S Todros
- Department of Industrial Engineering, Centre for Mechanics of Biological Materials, University of Padova, Padova, Italy
| | - P G Pavan
- Department of Industrial Engineering, Centre for Mechanics of Biological Materials, University of Padova, Padova, Italy
| | - P Pachera
- Department of Industrial Engineering, Centre for Mechanics of Biological Materials, University of Padova, Padova, Italy
| | - A N Natali
- Department of Industrial Engineering, Centre for Mechanics of Biological Materials, University of Padova, Padova, Italy
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Pavan PG, Pachera P, Tiengo C, Natali AN. Biomechanical behavior of pericardial human tissue: a constitutive formulation. Proc Inst Mech Eng H 2014; 228:926-34. [PMID: 25224743 DOI: 10.1177/0954411914551853] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
This work aims to present a constitutive model suitable to interpret the biomechanical response of human pericardial tissues. The model is consistent with the need of describing large strains, anisotropy, almost incompressibility, and time-dependent effects. Attention is given to human pericardial tissue because of the increased interest in its application as a substitute in reconstructive surgery. Specific, even limited, experimental investigation has been performed on human samples taken from surgical grafts in order to verify the capability of the constitutive model in supplying a correct description of tissue mechanical response. Experimental data include uni-axial tensile tests and stress relaxation tests up to 300 s, developed along different directions of the tissue. The grafts tested show different mechanical characteristics for what concern the level of anisotropy of the tissue. The constitutive model proposed shows to adapt to the different configurations of the human pericardium grafts, as emerged by experimental data considered, and it is capable to describe the variability of the mechanical characteristics.
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Affiliation(s)
- Piero G Pavan
- Department of Industrial Engineering, University of Padova, Padova, Italy Centre of Mechanics of Biological Materials, University of Padova, Padova, Italy
| | - Paola Pachera
- Department of Industrial Engineering, University of Padova, Padova, Italy Centre of Mechanics of Biological Materials, University of Padova, Padova, Italy
| | - Cesare Tiengo
- Department of Industrial Engineering, University of Padova, Padova, Italy Department of Molecular Medicine, University of Padova, Padova, Italy
| | - Arturo N Natali
- Department of Industrial Engineering, University of Padova, Padova, Italy Centre of Mechanics of Biological Materials, University of Padova, Padova, Italy
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Calvo B, Sierra M, Grasa J, Muñoz M, Peña E. Determination of passive viscoelastic response of the abdominal muscle and related constitutive modeling: Stress-relaxation behavior. J Mech Behav Biomed Mater 2014; 36:47-58. [DOI: 10.1016/j.jmbbm.2014.04.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2014] [Revised: 04/02/2014] [Accepted: 04/09/2014] [Indexed: 10/25/2022]
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