Biomedical Glasses最新文献_第8页

Trabecular coating on curved alumina substrates using a novel bioactive and strong glass-ceramic 一种新型生物活性强玻璃陶瓷在弯曲氧化铝基板上的小梁涂层

Biomedical Glasses Pub Date : 2015-07-17 DOI: 10.1515/bglass-2015-0003

F. Baino, C. Vitale-Brovarone

{"title":"Trabecular coating on curved alumina substrates using a novel bioactive and strong glass-ceramic","authors":"F. Baino, C. Vitale-Brovarone","doi":"10.1515/bglass-2015-0003","DOIUrl":"https://doi.org/10.1515/bglass-2015-0003","url":null,"abstract":"Abstract In the last few years, optimal fixation of orthopaedic implants evolved to preserve host bone and enhance tissue integration by surface modifications, including the use of coatings with bioactive ceramics. In this work, we fabricated a novel bone-like porous bioactive glass-ceramic coating on curved alumina substrates; good joining between the two components was possible due to the interposition of a glass-derived dense interlayer. The mechanical properties of the porous glass-ceramic, which mimics the 3-D pore architecture of cancellous bone, are adequate for load-bearing applications (compressive strength of 19 MPa and fracture energy around 6.5×10−4 J mm−3, with a total porosity of 62 vol.%). In vitro bioactive behaviour was investigated by testing the samples in simulated body fluid and by evaluating the apatite formation on the surface and pore struts of the trabecular coating, which is a key precondition for in vivo osteointegration. The concepts disclosed in the present study could find interesting application in the context of orthopaedic implants, with particular reference to full-ceramic acetabular cups for hip joint prosthesis.","PeriodicalId":37354,"journal":{"name":"Biomedical Glasses","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2015-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/bglass-2015-0003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67220863","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: 7

Influence of textural properties on biomineralization behavior of mesoporous bioactive glasses 介孔生物活性玻璃的结构特性对生物矿化行为的影响

Biomedical Glasses Pub Date : 2015-07-16 DOI: 10.1515/bglass-2015-0002

Ashok Kumar, S. Murugavel

{"title":"Influence of textural properties on biomineralization behavior of mesoporous bioactive glasses","authors":"Ashok Kumar, S. Murugavel","doi":"10.1515/bglass-2015-0002","DOIUrl":"https://doi.org/10.1515/bglass-2015-0002","url":null,"abstract":"Abstract A new method of calcination for the sol-gel derived bioactive glass sample has been developed to produce superior textural and bioactive properties. Based on this method, mesoporous 67.4 SiO2-25 Na2O-5 CaO- 2.6 P2O5 (mol.%) bioactive glasses (MBGs) have been synthesized through acid assisted sol-gel technique followed by evaporation induced self-assembly (EISA) process, commonly used for obtaining bioactive glasses. Moreover, the use of microwave irradiation has been compared with that of conventional heat treatment for a particular quaternary composition,which has allowed the homogeneous spatial distribution of heat and to obtain smaller, uniform pore sizes with high surface area. The distinctions between the two methods of calcination have been observed in the structural, morphology and textural characteristics. The superior textural characteristics have allowed the rapid dissolution of MBGs followed by development of nanocrystalline hydroxycarbonate apatite (HCA) layer. In vitro bioactive analyses on both MBGs have revealed a rapid formation HCA layer with distinct behavior on the biomineralization process. The difference in the behavior of biomineralization process is attributed to the kinetics of supersaturation of the biological medium.","PeriodicalId":37354,"journal":{"name":"Biomedical Glasses","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2015-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/bglass-2015-0002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67220713","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: 4

Opening paper 2015- Some comments on Bioglass: Four Eras of Discovery and Development 开幕论文2015-对生物玻璃的一些评论:发现和发展的四个时代

Biomedical Glasses Pub Date : 2015-06-09 DOI: 10.1515/bglass-2015-0001

L. Hench

引用次数: 103

Characterization of Y2O3 and CeO2 doped SiO2-SrO-Na2O glasses Y2O3和CeO2掺杂SiO2-SrO-Na2O玻璃的表征

Biomedical Glasses Pub Date : 2015-01-30 DOI: 10.1515/bglass-2015-0016

L. Placek, T. Keenan, F. Laffir, A. Coughlan, A. Wren

{"title":"Characterization of Y2O3 and CeO2 doped SiO2-SrO-Na2O glasses","authors":"L. Placek, T. Keenan, F. Laffir, A. Coughlan, A. Wren","doi":"10.1515/bglass-2015-0016","DOIUrl":"https://doi.org/10.1515/bglass-2015-0016","url":null,"abstract":"Abstract The structural effects of yttrium (Y) and cerium (Ce) are investigated when substituted for sodium (Na) in a 0.52SiO2–0.24SrO–(0.24−x)Na2O–xMO (where x = 0.08; MO = Y2O3 and CeO2) glass series. Network connectivity (NC) was calculated assuming both Y and Ce can act as a network modifier (NC = 2.2) or as a network former (NC up to 2.9). Thermal analysis showed an increase in glass transition temperature (Tg) with increasing Y and Ce content, Y causing the greater increase from the control (Con) at 493∘C to 8 mol% Y (HY) at 660∘C. Vickers hardness (HV) was not significantly different between glasses. 29Si Magic Angle Spinning-Nuclear Magnetic Resonance (MAS-NMR) did not show peak shift with addition of Y, however Ce produced peak broadening and a negative shift in ppm. The addition of 4 mol% Ce in the YCe and LCe glasses shifted the peak from Con at −81.3 ppm to −82.8 ppm and −82.7 ppm respectively; while the HCe glass produced a much broader peak and a shift to −84.8 ppm. High resolution X-ray Photoelectron Spectroscopy for the O 1s spectral line showed the ratio of bridging (BO) to non-bridging oxygens (NBO), BO:NBO,was altered,where Con had a ratio of 0.7, HY decreased to 0.4 and HCe to 0.5.","PeriodicalId":37354,"journal":{"name":"Biomedical Glasses","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2015-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/bglass-2015-0016","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67221724","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: 3