C. Candan, B. Nergis, S. Duru, N. Aral, Müge Nur Güner, H. M. Bulut
Unlike team sports like football and basketball, professional car racing is considered as an individual competitive sport that inspires fan loyalty both nationally and globally. It is also unique because male and female drivers compete against each other under the same circumstances and supposedly, gender is not a determining factor, though throughout the history of motorsports has mainly been a male dominated field. There are many studies on analyzing the protective performance of the suit made for some specific sports such as cycling, sailing, flying etc., but limited effort has been made to understand female car racers’ expectations of their suit and in particular undergarment in terms of performance, fit, comfort, and aesthetic. So, the study was conducted to design and develop an undergarment prototype by investigating and exploring the issues that female racing drivers face while wearing a unisex suit and accompanying undergarment. For this purpose, 18 types of single jersey knitted samples were developed and their dimensional and comfort properties were measured. The results were evaluated using AHP-TOPSIS multi-criteria decision making method, so that a seamless undergarment prototype with varying structures at areas such as torso and bust was proposed for female racing drivers, which can be improved in parallel with FIA regulations for further study. Keywords: female racers, activewear, sportswear, seamless knitting, undergarment, moisture management.
{"title":"Design of Undergarment for Female Racing Drivers","authors":"C. Candan, B. Nergis, S. Duru, N. Aral, Müge Nur Güner, H. M. Bulut","doi":"10.4028/p-y94633","DOIUrl":"https://doi.org/10.4028/p-y94633","url":null,"abstract":"Unlike team sports like football and basketball, professional car racing is considered as an individual competitive sport that inspires fan loyalty both nationally and globally. It is also unique because male and female drivers compete against each other under the same circumstances and supposedly, gender is not a determining factor, though throughout the history of motorsports has mainly been a male dominated field. There are many studies on analyzing the protective performance of the suit made for some specific sports such as cycling, sailing, flying etc., but limited effort has been made to understand female car racers’ expectations of their suit and in particular undergarment in terms of performance, fit, comfort, and aesthetic. So, the study was conducted to design and develop an undergarment prototype by investigating and exploring the issues that female racing drivers face while wearing a unisex suit and accompanying undergarment. For this purpose, 18 types of single jersey knitted samples were developed and their dimensional and comfort properties were measured. The results were evaluated using AHP-TOPSIS multi-criteria decision making method, so that a seamless undergarment prototype with varying structures at areas such as torso and bust was proposed for female racing drivers, which can be improved in parallel with FIA regulations for further study. Keywords: female racers, activewear, sportswear, seamless knitting, undergarment, moisture management.","PeriodicalId":15161,"journal":{"name":"Journal of Biomimetics, Biomaterials and Biomedical Engineering","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2022-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48354248","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. Padrão, Inês Pinheiro, Carla Silva, Alice Ribeiro, V. Bouça, L. Melro, R. Fernandes, A. I. Ribeiro, H. Felgueiras, A. Zille
Wound infection hinders adequate healing, being particularly grievous and prevalent in burn wounds and chronic wounds. Wound infection extends inflammation, preventing epithelialization and angiogenesis. Therefore, infection prolongs healing time, steeply increases treatment costs and degrades patients wellbeing. One successful strategy to control wound infection is to apply an active wound dressing, able to eliminate or significantly reduce the microbial population present at the infection site. Silver nanoparticles (AgNPs) are a multipurpose antimicrobial agent with a wide scope of applications which include wound dressings. Nevertheless, several studies denote AgNPs dose-dependent cytotoxicity, and their capability to bypass the blood-brain barrier and induce a neurotoxic effect. Hence, we propose to adopt two different strategies to attempt the simultaneously immobilize and increase the load of AgNPs within the wound dressing fabric. Thus, the envisaged objective is to prevent potential systemic cytotoxicity /through immobilization and to improve its antimicrobial capability due to the higher concentration of AgNPs. Two different approaches were used: i. AgNPs were suspended in an alginate (ALG) solution, ii. AgNPs were embedded in Mordenite (MOR) zeolite, followed by addition of an ALG solution. Both suspensions were incorporated into polyester fabric assisted by its surface activation by dielectric barrier discharge (DBD) plasma treatment. The bactericidal and virucidal effectiveness of each composite was tested against bacteria species known to induce nosocomial infections and a bacteriophage that is a potential surrogate of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Two distinct antimicrobial analysis were used to provide insights on the antimicrobial effectiveness of the obtained composites and to indirectly assess the release of AgNPs.
{"title":"Distinct Antimicrobial Analysis to Evaluate Multi-Component Wound Dressing Performance","authors":"J. Padrão, Inês Pinheiro, Carla Silva, Alice Ribeiro, V. Bouça, L. Melro, R. Fernandes, A. I. Ribeiro, H. Felgueiras, A. Zille","doi":"10.4028/p-kdad2h","DOIUrl":"https://doi.org/10.4028/p-kdad2h","url":null,"abstract":"Wound infection hinders adequate healing, being particularly grievous and prevalent in burn wounds and chronic wounds. Wound infection extends inflammation, preventing epithelialization and angiogenesis. Therefore, infection prolongs healing time, steeply increases treatment costs and degrades patients wellbeing. One successful strategy to control wound infection is to apply an active wound dressing, able to eliminate or significantly reduce the microbial population present at the infection site. Silver nanoparticles (AgNPs) are a multipurpose antimicrobial agent with a wide scope of applications which include wound dressings. Nevertheless, several studies denote AgNPs dose-dependent cytotoxicity, and their capability to bypass the blood-brain barrier and induce a neurotoxic effect. Hence, we propose to adopt two different strategies to attempt the simultaneously immobilize and increase the load of AgNPs within the wound dressing fabric. Thus, the envisaged objective is to prevent potential systemic cytotoxicity /through immobilization and to improve its antimicrobial capability due to the higher concentration of AgNPs. Two different approaches were used: i. AgNPs were suspended in an alginate (ALG) solution, ii. AgNPs were embedded in Mordenite (MOR) zeolite, followed by addition of an ALG solution. Both suspensions were incorporated into polyester fabric assisted by its surface activation by dielectric barrier discharge (DBD) plasma treatment. The bactericidal and virucidal effectiveness of each composite was tested against bacteria species known to induce nosocomial infections and a bacteriophage that is a potential surrogate of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Two distinct antimicrobial analysis were used to provide insights on the antimicrobial effectiveness of the obtained composites and to indirectly assess the release of AgNPs.","PeriodicalId":15161,"journal":{"name":"Journal of Biomimetics, Biomaterials and Biomedical Engineering","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2022-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43026820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
B. Reis, R. Miguel, J. Lucas, Madalena Pereira, Cláudia Pinheiro, Gilda Santos, J. Carvalho, F. Moreira da Silva, M. S. Silva
Considering textiles and clothing, current trends are focused on increasing the technicality of the products, with more alert and demanding consumers, looking for functional products such as workwear, sportswear, or day-life clothing, which combine aesthetics and innovation, design, protection, comfort, multifunctionality, ease care, sustainability, and competitive price. The result of social change focused on a healthier lifestyle and activewear is a growing demand. The TexBoost Project – Less Commodities More Specialities, PPS 2 "New fabrics for high-performance applications based on natural fibres" seeks to respond to these challenges and trends through the development of technologically advanced products and processes that enable companies to grow in the value chain and penetrate in more competitive market niches. This work aims to present some results that identify the main innovative characteristics and advancements considering the new fabrics for high-performance applications based on natural fibres, focusing on the development of multifunctional wool fabrics and laminated textile structures for leisurewear products. Comfort needs to be considered as an important factor considering the development of clothing. Taking into account the evaluation of the performance of the main comfort properties, the laboratory tests performed were the resistance to water penetration (hydrostatic pressure), the air permeability and skin model tests.
{"title":"Functional Design of Tri-Laminated Wool Fabrics Improving Comfort Properties","authors":"B. Reis, R. Miguel, J. Lucas, Madalena Pereira, Cláudia Pinheiro, Gilda Santos, J. Carvalho, F. Moreira da Silva, M. S. Silva","doi":"10.4028/p-435hw2","DOIUrl":"https://doi.org/10.4028/p-435hw2","url":null,"abstract":"Considering textiles and clothing, current trends are focused on increasing the technicality of the products, with more alert and demanding consumers, looking for functional products such as workwear, sportswear, or day-life clothing, which combine aesthetics and innovation, design, protection, comfort, multifunctionality, ease care, sustainability, and competitive price. The result of social change focused on a healthier lifestyle and activewear is a growing demand. The TexBoost Project – Less Commodities More Specialities, PPS 2 \"New fabrics for high-performance applications based on natural fibres\" seeks to respond to these challenges and trends through the development of technologically advanced products and processes that enable companies to grow in the value chain and penetrate in more competitive market niches. This work aims to present some results that identify the main innovative characteristics and advancements considering the new fabrics for high-performance applications based on natural fibres, focusing on the development of multifunctional wool fabrics and laminated textile structures for leisurewear products. Comfort needs to be considered as an important factor considering the development of clothing. Taking into account the evaluation of the performance of the main comfort properties, the laboratory tests performed were the resistance to water penetration (hydrostatic pressure), the air permeability and skin model tests.","PeriodicalId":15161,"journal":{"name":"Journal of Biomimetics, Biomaterials and Biomedical Engineering","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2022-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48342066","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This work presents a systematic review to provide an overview of the possibilities for coupling, fabrication or embedding of electronics into textiles whilst assuring the capability of these products to meet the requirements of a sports modality. The development of smart wearables systems for sports based on textiles attracts more and more users – motivated by design, by technology, as well as by the expectation of increased performance. A bibliographic search was carried out using the following databases: Scopus, Web of Science, IEEE Xplore and Science Direct. This study includes 32 articles and discusses these in a new taxonomy with three dimensions: measured variable, types of feedback and applications. Of the 23 technologies surveyed, this review showed that these wearable systems are mainly used for vital signs monitoring and to provide feedback on the electrical activity of the heart, with sensors mostly placed in the chest. Usually, the technologies are externally attachable rather than embedded in the textile. We observed that the implementation of design as the process of development of e-textile products is still only scarcely present in these studies.
这项工作提供了一个系统的综述，概述了将电子产品耦合、制造或嵌入纺织品的可能性，同时确保这些产品能够满足体育模式的要求。基于纺织品的运动智能可穿戴设备系统的开发吸引了越来越多的用户，其动机是设计、技术以及对性能提高的期望。使用以下数据库进行了书目搜索：Scopus、Web of Science、IEEE Xplore和Science Direct。这项研究包括32篇文章，并在一个新的分类法中讨论了这些内容，包括三个维度：测量变量、反馈类型和应用程序。在调查的23项技术中，这项综述表明，这些可穿戴系统主要用于生命体征监测和提供心脏电活动的反馈，传感器大多放置在胸部。通常，这些技术是可外部连接的，而不是嵌入织物中。我们观察到，在这些研究中，设计作为电子纺织品开发过程的实施仍然很少。
{"title":"E-Textiles for Sports: A Systematic Review","authors":"Daniel Vieira, H. Carvalho, B. Providência","doi":"10.4028/p-e03md3","DOIUrl":"https://doi.org/10.4028/p-e03md3","url":null,"abstract":"This work presents a systematic review to provide an overview of the possibilities for coupling, fabrication or embedding of electronics into textiles whilst assuring the capability of these products to meet the requirements of a sports modality. The development of smart wearables systems for sports based on textiles attracts more and more users – motivated by design, by technology, as well as by the expectation of increased performance. A bibliographic search was carried out using the following databases: Scopus, Web of Science, IEEE Xplore and Science Direct. This study includes 32 articles and discusses these in a new taxonomy with three dimensions: measured variable, types of feedback and applications. Of the 23 technologies surveyed, this review showed that these wearable systems are mainly used for vital signs monitoring and to provide feedback on the electrical activity of the heart, with sensors mostly placed in the chest. Usually, the technologies are externally attachable rather than embedded in the textile. We observed that the implementation of design as the process of development of e-textile products is still only scarcely present in these studies.","PeriodicalId":15161,"journal":{"name":"Journal of Biomimetics, Biomaterials and Biomedical Engineering","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2022-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45860964","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Abreu, Etienne Martins, N. Nagamatsu, Wanderlayne Amaral
This investigation aims to present the process of development of the attributes that will form the textile lexicon of the northeast region of Brazil for the assessment of textile tactile comfort. For this purpose, the following were adapted: ISO 11035:1994 Sensory analysis – Identification and selection of descriptors for establishing a sensory profile by a multidimensional approach; and ISO 8586:2012 Sensory analysis – General guidelines for the selection, training and monitoring of selected assessors and expert sensory assessor’s standards concerning the areas of food and cosmetics. Three panels of naive assessors from three different cities in northeastern Brazil were invited to touch 8 samples of fabrics with different textures and compositions. Initially, they generated 322 terms. Afterwards, in a second phase, they qualitatively eliminated terms with the same meaning. In the third phase, they grouped the terms through similarity analysis, which resulted in 23 terms. Then, the terms that were most cited by the assessors were analyzed and, as a result, 4 terms were eliminated. Finally, similarities were evidenced in the haptic perceptions that were perceived by the different panels, due to their cultural proximity and the fact that they come from the same region of a country with continental dimensions, as well as the transformation of human subjectivity into objective parameters provided by the textile lexicon.
{"title":"Tactile Perception in the Sensory Comfort of Fabric Samples","authors":"M. Abreu, Etienne Martins, N. Nagamatsu, Wanderlayne Amaral","doi":"10.4028/p-u5364t","DOIUrl":"https://doi.org/10.4028/p-u5364t","url":null,"abstract":"This investigation aims to present the process of development of the attributes that will form the textile lexicon of the northeast region of Brazil for the assessment of textile tactile comfort. For this purpose, the following were adapted: ISO 11035:1994 Sensory analysis – Identification and selection of descriptors for establishing a sensory profile by a multidimensional approach; and ISO 8586:2012 Sensory analysis – General guidelines for the selection, training and monitoring of selected assessors and expert sensory assessor’s standards concerning the areas of food and cosmetics. Three panels of naive assessors from three different cities in northeastern Brazil were invited to touch 8 samples of fabrics with different textures and compositions. Initially, they generated 322 terms. Afterwards, in a second phase, they qualitatively eliminated terms with the same meaning. In the third phase, they grouped the terms through similarity analysis, which resulted in 23 terms. Then, the terms that were most cited by the assessors were analyzed and, as a result, 4 terms were eliminated. Finally, similarities were evidenced in the haptic perceptions that were perceived by the different panels, due to their cultural proximity and the fact that they come from the same region of a country with continental dimensions, as well as the transformation of human subjectivity into objective parameters provided by the textile lexicon.","PeriodicalId":15161,"journal":{"name":"Journal of Biomimetics, Biomaterials and Biomedical Engineering","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2022-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46891147","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Polymer matrix composites are suitable materials for medical applications, such as denture base resin polymethyl methacrylate (PMMA). This includes light weight and high strength. This paper describes the effect of selected weight fractions (1, 2, 3, 4 & 5) % wt of nano(Alumina AL2O3, Zirconia ZrO2, Hydroxyapatite HA and Halloysite nanoClay) reinforcements on the biopolymer matrix (PMMA). Some tribology tests were used to evaluate the prepared system (impact strength, hardness surface, and wear rate) tests. The samples were fabricated by (Hand Lay-Up) with different particle reinforcement percentages. All tests were accomplished at room temperature, and samples were developed according to the ASTM standard. The weight fraction of (4% for AL2O3, 4% for ZrO2, 3% for HA and 5% for Clay) nanoparticles are the best results that appeared in the work.
{"title":"Influence of Bioactive and Bio Inert Ceramic Powders on Tribology Properties of PMMA Composite Denture Base","authors":"Shahad Hussain, A. Al-Sarraf","doi":"10.4028/p-3f74k7","DOIUrl":"https://doi.org/10.4028/p-3f74k7","url":null,"abstract":"Polymer matrix composites are suitable materials for medical applications, such as denture base resin polymethyl methacrylate (PMMA). This includes light weight and high strength. This paper describes the effect of selected weight fractions (1, 2, 3, 4 & 5) % wt of nano(Alumina AL2O3, Zirconia ZrO2, Hydroxyapatite HA and Halloysite nanoClay) reinforcements on the biopolymer matrix (PMMA). Some tribology tests were used to evaluate the prepared system (impact strength, hardness surface, and wear rate) tests. The samples were fabricated by (Hand Lay-Up) with different particle reinforcement percentages. All tests were accomplished at room temperature, and samples were developed according to the ASTM standard. The weight fraction of (4% for AL2O3, 4% for ZrO2, 3% for HA and 5% for Clay) nanoparticles are the best results that appeared in the work.","PeriodicalId":15161,"journal":{"name":"Journal of Biomimetics, Biomaterials and Biomedical Engineering","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2022-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43695578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nelson Pinto, M. Abreu, André Paulo de Almeida Whiteman Catarino
Compression garments has emerged as an important tool in sport activity [1, 2]. In the particular case of compression socks (CS), several studies show that their use improves the fatigue recovery and prevents muscle injuries [3-6]. The aim of this research work is to perform the characterization of sports socks regarding their comfort and compression. Several parameters were monitored in volunteers during a running test. This test was performed in a non-inclined treadmill for 12 minutes at 12km/h. PicoPress equipment was used to recording the compression force; Thermodata sensors were used to monitor the temperature and humidity; Wrist pulse oximeter was used to measure the oxygen saturation and heart rate; and thermal imaging with a TESTO IR camera was used for thermal component evaluation. Wearing compression socks seem to return better conditions for comfort, muscle stability and muscle fatigue because the main conclusions of the test show that the volunteers feel better at muscle stability (MS) and no fatigue after 24 hours of running.
{"title":"Wear Trials about Comfort on Sport Compression Socks","authors":"Nelson Pinto, M. Abreu, André Paulo de Almeida Whiteman Catarino","doi":"10.4028/p-ci8p3o","DOIUrl":"https://doi.org/10.4028/p-ci8p3o","url":null,"abstract":"Compression garments has emerged as an important tool in sport activity [1, 2]. In the particular case of compression socks (CS), several studies show that their use improves the fatigue recovery and prevents muscle injuries [3-6]. The aim of this research work is to perform the characterization of sports socks regarding their comfort and compression. Several parameters were monitored in volunteers during a running test. This test was performed in a non-inclined treadmill for 12 minutes at 12km/h. PicoPress equipment was used to recording the compression force; Thermodata sensors were used to monitor the temperature and humidity; Wrist pulse oximeter was used to measure the oxygen saturation and heart rate; and thermal imaging with a TESTO IR camera was used for thermal component evaluation. Wearing compression socks seem to return better conditions for comfort, muscle stability and muscle fatigue because the main conclusions of the test show that the volunteers feel better at muscle stability (MS) and no fatigue after 24 hours of running.","PeriodicalId":15161,"journal":{"name":"Journal of Biomimetics, Biomaterials and Biomedical Engineering","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2022-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44833331","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This research has studied the addition effect of woven carbon fiber treated with NaOH and coated by β- TCP to the conventional polymethyl methacrylate (PMMA). Two stages are involved in the preparation of heat-cured acrylic denture composite. The first chemical treatment of woven carbon fiber (WCF) surface by different concentrations of NaOH (0.10, 0.15, and 0.20 M) and coating carbon fiber with β-TCP by various weight fractions (0.08, 0.10, and 0.12 wi) were carried out. The second stage includes the reinforcement of denture base material by treated and coated WCF. The functional groups of the WCF surface before and after alkali treatment were studied by FTIR. The morphology of the WCF surface before and after alkali treatment was observed by FESEM, the diameter of pores on the untreated and treated fibers, and the adhesion of β-TCP powder to the fiber was also observed. Mechanical tests include: impact strength (I.S.) and flexural strength (F.S) were calculated using a three-point bending test with a universal test machine and a Charpy impact test machine, respectively. From the result, reinforcing PMMA with treated and coated WCF improves the mechanical properties (impact and flexural strength).
{"title":"Incorporation of Treated Woven Carbon Fiber to Methacrylate Resin for Heat-Cured Acrylic Denture Composite","authors":"Wafaa A. Hussain, M. Ismail, S. Taher","doi":"10.4028/p-627g18","DOIUrl":"https://doi.org/10.4028/p-627g18","url":null,"abstract":"This research has studied the addition effect of woven carbon fiber treated with NaOH and coated by β- TCP to the conventional polymethyl methacrylate (PMMA). Two stages are involved in the preparation of heat-cured acrylic denture composite. The first chemical treatment of woven carbon fiber (WCF) surface by different concentrations of NaOH (0.10, 0.15, and 0.20 M) and coating carbon fiber with β-TCP by various weight fractions (0.08, 0.10, and 0.12 wi) were carried out. The second stage includes the reinforcement of denture base material by treated and coated WCF. The functional groups of the WCF surface before and after alkali treatment were studied by FTIR. The morphology of the WCF surface before and after alkali treatment was observed by FESEM, the diameter of pores on the untreated and treated fibers, and the adhesion of β-TCP powder to the fiber was also observed. Mechanical tests include: impact strength (I.S.) and flexural strength (F.S) were calculated using a three-point bending test with a universal test machine and a Charpy impact test machine, respectively. From the result, reinforcing PMMA with treated and coated WCF improves the mechanical properties (impact and flexural strength).","PeriodicalId":15161,"journal":{"name":"Journal of Biomimetics, Biomaterials and Biomedical Engineering","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2022-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45065978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The cervical spine is a structure subject to various vertebral injuries, namely, herniation of intervertebral discs and osteoporosis. Nowadays, several segments of society are vulnerable to these diseases that affect spine motion especially elderly people and women. Hence, various designs of cervical artificial discs are in use or under investigation claiming to restore the normal kinematics of the cervical spine. In this work, it is proposed to minimize the stress level by numerical size optimization in the Mobi-C cervical spine prosthesis to improve their biomechanical performances. For this aim, design of experiment (DoE) is employed as an optimization technique to investigate three geometrical parameters of the prosthesis design. Accordingly, DoE optimization allowed to minimize the equivalent stress value on Mobi-C from 20.3 MPa to 17.856 MPa corresponding to a percentage decrease of 12% from the original geometry. This provides an advantage for the durability of the prosthesis and also for the bone by reducing stress concentration.
{"title":"Numerical Size Optimization of Cervical Spine Disc Prosthesis Mobi-C Using Design of Experiment Technics","authors":"K. Chenaifi, Cherif Ali Messellek, Y. Benabid","doi":"10.4028/p-jo58gu","DOIUrl":"https://doi.org/10.4028/p-jo58gu","url":null,"abstract":"The cervical spine is a structure subject to various vertebral injuries, namely, herniation of intervertebral discs and osteoporosis. Nowadays, several segments of society are vulnerable to these diseases that affect spine motion especially elderly people and women. Hence, various designs of cervical artificial discs are in use or under investigation claiming to restore the normal kinematics of the cervical spine. In this work, it is proposed to minimize the stress level by numerical size optimization in the Mobi-C cervical spine prosthesis to improve their biomechanical performances. For this aim, design of experiment (DoE) is employed as an optimization technique to investigate three geometrical parameters of the prosthesis design. Accordingly, DoE optimization allowed to minimize the equivalent stress value on Mobi-C from 20.3 MPa to 17.856 MPa corresponding to a percentage decrease of 12% from the original geometry. This provides an advantage for the durability of the prosthesis and also for the bone by reducing stress concentration.","PeriodicalId":15161,"journal":{"name":"Journal of Biomimetics, Biomaterials and Biomedical Engineering","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2022-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41517255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Zahra Keykhaee, Amin Bahmani, N. Sattarahmady, Marzieh Ghanbari Jahromi, E. Shokri
In the present study, a simple and fast approach was developed for the green synthesis of silver nanoparticles by using Eryngium campestre (Eryngo) extract prepared in boiling water. People have widely used the Eryngo plant as a vegetable, food, and medicine around the world. The dried leaves of Eryngo extracted in boiling water yielded approximately 67 mg/g (6.6%) solid residue. The extract had a high antioxidant activity of 71 %, which was rich in total phenolic and flavonoids as revealed through colorimetric assays. For preparing nanoparticles, silver nitrate was added to the plant extract diluents and kept until the solution color changed with a sharp indicative peak of AgNPs that appeared at 450 nm. In addition, UV/Vis, TEM, FESEM, DLS, EDS, and XRD analysis were used to characterize the as-synthesized AgNPs. The results confirmed the spherical shape and nano nature of AgNPs with an average size of 32 nm based on Fe-SEM and TEM observations. The prepared AgNPs also shown moderate free radical scavenging activity (60%) in DPPH test and exhibit antibacterial activity at low concentration (50 μg/mL) toward both gram-positive and gram-negative bacteria. In this respect, the inhibition zone was higher in gram-positive bacteria and the sensitivity order of S.aureus > MRSA > B.subtilis > P.aeruginosa > E.coli was achieved in response to Eryngo AgNPs. Interestingly, Eryngo AgNPs at low concentration were efficient on MRSA, as an antibiotic-resistant strain of S.aureus.
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