Biosurface and Biotribology最新文献_第9页

Development of a pendulum machine for measuring contact lens friction 测量隐形眼镜摩擦的摆摆机的研制

Biosurface and Biotribology Pub Date : 2021-05-02 DOI: 10.1049/bsb2.12004

Kiyoshi Mabuchi, Hiroko Iwashita, Rina Sakai, Masanobu Ujihira, Yuichi Hori

{"title":"Development of a pendulum machine for measuring contact lens friction","authors":"Kiyoshi Mabuchi, Hiroko Iwashita, Rina Sakai, Masanobu Ujihira, Yuichi Hori","doi":"10.1049/bsb2.12004","DOIUrl":"10.1049/bsb2.12004","url":null,"abstract":"<p>The lubrication ability of a contact lens is one of its most essential properties because high friction on an eyelid causes discomfort during blinking. Friction measurements allow assessment of lubrication ability. So far, several apparatuses have been developed to measure contact lens friction. However, thus far, ocular physiological conditions including sliding speed and area have been imperfectly realised. Herein, a pendulum-type friction tester was developed for the assessment of contact lenses under physiological conditions. A high sliding speed of 90 mm/s was achieved thanks to the short oscillation period of the small pendulum. Physiologically, the sliding surface on a contact lens was realised at the fulcrum of the pendulum. The coefficient of friction for the interaction between a contact lens and plastic hemisphere was directly calculated from the decay in potential energy during the free libration of the pendulum. Friction coefficient of a commercially available contact lens in saline solution, 0.1% and 0.3% HA solutions were 0.036, 0.039 and 0.050, respectively. These results were reliable because they ranged within the low levels reported by previous studies. It was shown that the present pendulum machine represents a major advancement in the realisation of physiologically realistic contact lens friction measurement.</p>","PeriodicalId":52235,"journal":{"name":"Biosurface and Biotribology","volume":"7 3","pages":"154-161"},"PeriodicalIF":0.0,"publicationDate":"2021-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/bsb2.12004","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42364434","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

The development of simulator testing for total knee replacements 全膝关节置换术模拟试验的研制

Biosurface and Biotribology Pub Date : 2021-04-26 DOI: 10.1049/bsb2.12001

Chase Maag, Amber Metcalfe, Ioan Cracaoanu, Casey Wise, Daniel D. Auger

{"title":"The development of simulator testing for total knee replacements","authors":"Chase Maag, Amber Metcalfe, Ioan Cracaoanu, Casey Wise, Daniel D. Auger","doi":"10.1049/bsb2.12001","DOIUrl":"10.1049/bsb2.12001","url":null,"abstract":"<p>Professor Duncan Dowson was a pioneer in the field of tribology and simulator design. His work sparked many branches of research across orthopaedics. The first knee simulator described by Dowson was intended to measure the wear performance of early total knee replacements (TKRs). The industry has since advanced to achieve simulator designs with significant improvements including multi-station, multi-axis, multi-control, and multi-environmental capabilities. These simulators are used to test and compare not only wear, but also the kinematic/kinetic behaviour of TKRs and many other TKR design interactions prior to implantation. This has led to changes to the design of TKRs ranging from improvements to the tibial insert to the femoral component; all, in some way, thanks to Professor Duncan Dowson's inquisitive nature. This article provides a selective review to show the interdependencies of research and development endeavours starting with the evolution of knee simulators, the many advances in TKRs and finally the interconnection with cadaveric motion simulators.</p>","PeriodicalId":52235,"journal":{"name":"Biosurface and Biotribology","volume":"7 2","pages":"70-82"},"PeriodicalIF":0.0,"publicationDate":"2021-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/bsb2.12001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45030824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Measuring the micromechanical properties of oesophageal mucosa with atomic force microscopy 用原子力显微镜测定食管黏膜的微观力学性质

Biosurface and Biotribology Pub Date : 2020-12-16 DOI: 10.1049/bsbt.2020.0015

Chengxiong Lin, Jingyang Xie, Wei Li

{"title":"Measuring the micromechanical properties of oesophageal mucosa with atomic force microscopy","authors":"Chengxiong Lin, Jingyang Xie, Wei Li","doi":"10.1049/bsbt.2020.0015","DOIUrl":"10.1049/bsbt.2020.0015","url":null,"abstract":"<div>\u0000 <p>The micromechanical properties of soft tissue can be used as markers for the physiological state and function of the tissue. Deep understanding of the micromechanics of soft tissue, such as the oesophagus, is of great significance to the design of artificial oesophagi, endoscope materials and coatings for medical devices. Here, the micromechanical properties of oesophageal mucosa were studied under different loading rates, deflections, and dwell time by using atomic force microscopy. The micromechanical properties of soft tissue included elastic modulus, plasticity and adhesion force. Results showed that the micromechanical properties changed with increasing loading rate, deflection and dwell time. The micromechanical properties of oesophageal mucosa were related to time-dependent behaviours, such as contact stress, energy transformation, and strain gradient plasticity. Furthermore, the heterogeneity of oesophageal mucosa affected the micromechanical properties. The force mapping mode was a reliable and effective means to study the micromechanical properties of soft tissue. The results can provide a basis and technical support for the diagnosis of oesophageal diseases from a microscale as well as a material design perspective.</p>\u0000 </div>","PeriodicalId":52235,"journal":{"name":"Biosurface and Biotribology","volume":"6 4","pages":"97-103"},"PeriodicalIF":0.0,"publicationDate":"2020-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/bsbt.2020.0015","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47489121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tribological performance of microstructured surfaces with different wettability from superhydrophilic to superhydrophobic 从超亲水到超疏水不同润湿性微结构表面的摩擦学性能

Biosurface and Biotribology Pub Date : 2020-12-03 DOI: 10.1049/bsbt.2020.0023

Zhihui Zhang, Zhenquan Cui, Hujun Wang, Chaorui Jiang, Jie Zhao, Luquan Ren

{"title":"Tribological performance of microstructured surfaces with different wettability from superhydrophilic to superhydrophobic","authors":"Zhihui Zhang, Zhenquan Cui, Hujun Wang, Chaorui Jiang, Jie Zhao, Luquan Ren","doi":"10.1049/bsbt.2020.0023","DOIUrl":"10.1049/bsbt.2020.0023","url":null,"abstract":"<div>\u0000 <p>The anti-friction function of superwetting surfaces with superhydrophobicity has been demonstrated. However, the influence regularity of wettability to tribological performance, and the underlying mechanism are still unclear. Here, two kinds of microstructured surfaces with different wettability are fabricated on the substrate of steel by controlling surface chemical compositions. The water contact angles on these surfaces range from 0° to 151°. The ball-plate tribological tests are performed under water lubrication. The results show that the tribological performance is closely related to surface wettability. The friction coefficient increases with the increase of contact angles when the surfaces are hydrophilic rather than superhydrophilic. In contrast, the friction coefficient on the hydrophobic surfaces decreases with the increase of contact angles. Furthermore, the best anti-friction capability is obtained on the superhydrophobic surfaces, and the anti-friction mechanism is elucidated. The lowest friction coefficient was 0.12 under the load of 10 N. This work provides strong evidence of an association between tribological property and wettability, which may inspire the fabrication and application of special wetting surfaces in friction control.</p>\u0000 </div>","PeriodicalId":52235,"journal":{"name":"Biosurface and Biotribology","volume":"6 4","pages":"118-123"},"PeriodicalIF":0.0,"publicationDate":"2020-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/bsbt.2020.0023","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42645535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Effect of a chitosan edible-coating enriched with Citrus limon peel extracts and Ocimum tenuiflorum leaf extracts on the shelf-life of bananas 富含柠檬皮提取物和芦竹叶提取物的壳聚糖可食用涂层对香蕉保质期的影响

Biosurface and Biotribology Pub Date : 2020-12-03 DOI: 10.1049/bsbt.2020.0002

Samarpan Deb Majumder, Soumya Sarathi Ganguly

引用次数: 4

Dynamic testing of volleyball players' body posture using a formetric 3D device 利用形式化三维装置对排球运动员身体姿势进行动态测试

Biosurface and Biotribology Pub Date : 2020-11-24 DOI: 10.1049/bsbt.2020.0008

Jianhua Ying, Feng Ren, Gusztáv Fekete

{"title":"Dynamic testing of volleyball players' body posture using a formetric 3D device","authors":"Jianhua Ying, Feng Ren, Gusztáv Fekete","doi":"10.1049/bsbt.2020.0008","DOIUrl":"10.1049/bsbt.2020.0008","url":null,"abstract":"<div>\u0000 <p>Volleyball activities involve several factors such as asymmetrical movements, muscle imbalance, and continual overloading that damage body posture. This study aimed to determine postural changes of volleyball players in spike overhand front set, overhand pass ball, and mat ball motions, and if there is any postural variation difference between short training and long training volleyball players. Methods: Fifteen long training and short training male volleyball players aged 21–23 years were recruited in this study. The upper-thoracic angle, thoracic-lumbar segment angle, lower lumbar-sacral segment, pelvic inclination, and inclination of the acromion were measured using DIERS formetric 3D device in a dynamic way. During the overhand pass motion, long training participants showed a significant larger peak upper-thoracic and peak thoracic-lumbar angles than short training participants. During the mat ball motion, the long training volleyball players demonstrated a significant higher peak upper-thoracic angle, but a smaller peak inclination of the acromion than short trainers. During the spike overhand front set motion, long trainers showed a significant smaller peak upper-thoracic angle than short trainers. Athletes should consider developing an appropriate dynamic trunk stabilization to reduce posture imbalance during volleyball activities.</p>\u0000 </div>","PeriodicalId":52235,"journal":{"name":"Biosurface and Biotribology","volume":"6 4","pages":"114-117"},"PeriodicalIF":0.0,"publicationDate":"2020-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ietresearch.onlinelibrary.wiley.com/doi/epdf/10.1049/bsbt.2020.0008","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47564250","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Tribological performance of ionic liquid-lubricated carbon brush/collector ring current-carrying friction system 离子液体润滑碳刷/集电环载流摩擦系统的摩擦学性能

Biosurface and Biotribology Pub Date : 2020-10-28 DOI: 10.1049/bsbt.2020.0010

Yang Fu, Hongling Qin, Xiang Xu, Xiaolong Zhang, Zhiguang Guo

引用次数: 2

Erosion protection of low‐concentration fluoride on human tooth enamel: results from surface morphology and nanomechanical and anti‐wear properties 低浓度氟化物对人类牙釉质的腐蚀保护:表面形态和纳米力学和抗磨损性能的结果

Biosurface and Biotribology Pub Date : 2020-09-30 DOI: 10.1049/bsbt.2020.0017

L. Zheng, M. Shi

{"title":"Erosion protection of low‐concentration fluoride on human tooth enamel: results from surface morphology and nanomechanical and anti‐wear properties","authors":"L. Zheng, M. Shi","doi":"10.1049/bsbt.2020.0017","DOIUrl":"https://doi.org/10.1049/bsbt.2020.0017","url":null,"abstract":"Dental erosion results in excessive tooth wear. The contribution of low-concentration fluoride used daily in the prevention and treatment of erosion has not been fully understood. In this study, the effects of fluoride (225 ppm F−) on the surface morphology and nano-mechanical and anti-wear properties of human tooth enamel were investigated to explore whether low-concentration NaF solution could help protect tooth enamel from erosion. In total, 40 enamel samples were divided into 5 groups, viz. group O: original surface with no treatment, group F: fluoride treatment (NaF, 225 ppm F−, pH 6.3), group E: erosion treatment (0.001 M citric acid, pH 3.2, 3 min), group EF: erosion treatment and then fluorination and group FE: fluoride treatment and then erosion. The mechanical and anti-wear properties of enamel samples were examined using a nano-indentation/scratch technique. Both surface morphology and scratch morphology of enamel samples were observed with scanning electron microscopy. The results showed that, from the perspectives of surface morphology and anti-wear properties, fluorination with low-concentration fluoride (225 ppm F−) before erosion has a certain potential for protection against dental erosion. Fluoride treatment after erosion has no obvious impact on the remineralisation of eroded enamel.","PeriodicalId":52235,"journal":{"name":"Biosurface and Biotribology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44716335","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}

引用次数: 0

Effect of remineralisation on the mechanical properties and tribological behaviour of human tooth dentine 再矿化对人牙本质力学性能和摩擦学行为的影响

Biosurface and Biotribology Pub Date : 2020-09-22 DOI: 10.1049/bsbt.2020.0013

Xiaoyu Guo, Lei Lei, Heng Xiao, Jing Zheng

{"title":"Effect of remineralisation on the mechanical properties and tribological behaviour of human tooth dentine","authors":"Xiaoyu Guo, Lei Lei, Heng Xiao, Jing Zheng","doi":"10.1049/bsbt.2020.0013","DOIUrl":"https://doi.org/10.1049/bsbt.2020.0013","url":null,"abstract":"With ageing and pathological factors, dentine exposure becomes more and more commonplace in the clinic. The mechanical properties of dentine are far less than those of enamel. Once exposed, dentine exhibits a weak wear-resistance and then results in many oral diseases. Therefore, it is necessary to study effective measures to improve the wear-resistance of dentine. In this study, the effect of remineralisation on the mechanical properties and tribological behaviour of human dentine was studied in vitro using nano-indentation/scratch technique. Remineralisation treatment was conducted by immersing dentine specimens in casein phosphopeptides–amorphous calcium phosphate–asparagine-serine-serine solution for 7 days after 24 h pre-treatment in polydopamine solution. Results show that after the remineralisation treatment, dentine surface is covered with a layer of dense hydroxyapatite (HA) crystals with high crystallinity and preferential orientation, and dentinal tubules are occluded. Surface hardness and elastic modulus of dentine increase by 35 and 78%, respectively, and the wear volume decreases by 86%. The crystals that occlude the dentine tubules do not fall off on the worn surface. In sum, remineralisation enhances the mechanical properties and anti-wear performance of dentine surface by forming a hard covering consisting of dense HA crystals, which is a potential measure to prevent excessive tooth wear by dentine exposure.","PeriodicalId":52235,"journal":{"name":"Biosurface and Biotribology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44580237","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}

引用次数: 1

Injectable hydrogels for anti‐tumour treatment: a review 用于抗肿瘤治疗的可注射水凝胶：综述

Biosurface and Biotribology Pub Date : 2020-09-22 DOI: 10.1049/bsbt.2020.0020

Huang He, Chaoming Xie, Xiong Lu

引用次数: 6