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Anti-biofilm Effect of glass ionomer cements Incorporated with Chlorhexidine and Bioactive glass

Journal of Wuhan University of Technology(Materials Science) 2012年第2期27卷 270-275页

作者：黄雪清黄翠 The State Key Laboratory Breeding Base of Basic Science of Stomatology(Hubei-MOST)& Key Laboratory of Oral Biomedicine Ministry of Education School & Hospital of StomatologyWuhan University Department of Prosthodontics Guanghua School and Hospital of Stomatology and Institute of Stomatological ResearchSun Yat-sen University

The effect of glass ionomer cement and resin-modified glass ionomer cement incorporated with chlorhexidine and bioactive glass on antimicrobial activity and physicochemical properties were investigated. The experimental results showed that groups incorporated with 1% chlorhexidine exhibited a significant reduction of optical density values of the bacterial suspension and increased the degradation of Streptococcus mutans biofilm. However, groups incorporated with 10% bioactive glass did not affect the optical density values and the biofilm formation. The mechanical properties of the materials and the polymerization were not influenced by the addition of chlorhexidine. Nevertheless, the compressive strength was lower when the materials were incorporated with bioactive glass. It can be concluded that glass ionomer cements incorporated with chlorhexidine can maintain its mechanical properties as well as reduce early S mutans biofilm formation. Controlled release/sustained release technology may be required to optimize the antibacterial activity of glass ionomer cements incorporated with bioactive glass.

关键词： glass ionomer cements biofilm chlorhexidine bioactive glass

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Improvement of enamel bond strengths for conventional and resin-modified glass ionomers: acid-etching vs. conditioning

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2013年第11期14卷 1013-1024页

作者： Ling ZHANG Tian TANG Zhen-liang ZHANG Bing LIANG Xiao-miao WANG Bai-ping FU Hospital of Stomatology Affiliated to Zhejiang University School of Medicine

Objective:This study deals with the effect of phosphoric acid etching and conditioning on enamel micro-tensile bond strengths(μTBSs)of conventional and resin-modified glass ionomer cements(GICs/RMGICs).Methods:Forty-eight bovine incisors were prepared into rectangular ***-polished labial enamel surfaces were either acid-etched,conditioned with liquids of cements,or not further treated(control).Subsequently,two matching pre-treated enamel surfaces were cemented together with one of four cements[two GICs:Fuji I(GC),Ketac Cem Easymix(3M ESPE);two RMGICs:Fuji Plus(GC),RelyX Luting(3M ESPE)]in preparation forμTBS ***-treated enamel surfaces and cement-enamel interfaces were analyzed by scanning electron microscopy(SEM).Results:Phosphoric acid etching significantly increased the enamelμTBS of GICs/*** with the liquids of the cements produced significantly weaker or equivalent enamelμTBS compared to the *** of etching,RMGICs yielded stronger enamelμTBS than GICs.A visible hybrid layer was found at certain enamelcement interfaces of the etched ***:Phosphoric acid etching significantly increased the enamelμTBSs of GICs/*** acid etching should be recommended to etch the enamel margins before the cementation of the prostheses such as inlays and onlays,using GICs/RMGICs to improve the bond *** provided stronger enamel bond strength than GICs and conditioning did not increase enamel bond strength.

关键词： glass ionomer cements Surface treatments Bovine enamels Scanning electron microscopy(SEM) Micro-tensile bond strengths

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维普期刊数据库

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Setting kinetics and mechanical properties of flax fibre reinforced glass ionomer restorative materials

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The Journal of Biomedical Research 2017年第3期31卷 264-272页

作者： Ensanya Ali Abou Neel Anne M.Young Division of Biomaterials Conservative Dental Sciences DepartmentKing Abdualziz University Biomaterials Department Faculty of DentistryTanta University Division of Biomaterials and Tissue Engineering UCL Eastman Dental Institute

Regardless of the excellent properties of glass ionomer cements,their poor mechanical properties limit their applications to non-load bearing *** study aimed to investigate the effect of incorporated short,chopped and randomly distributed flax fibers（0,0.5,1,2.5,5 and 25 wt%） on setting reaction kinetics,and mechanical and morphological properties of glass ionomer *** of flax fibers did not significantly affect the setting reaction *** to their content,flax fibers increased the compressive（from 148 to 250 MPa） and flexure strength（from 20 to 42 MPa）.They also changed the brittle behavior of glass ionomer cements to a plastic *** significantly reduced the compressive（from 3 to 1.3 GPa） and flexure modulus（from 19 to 14 GPa）.Accordingly,flax fiber-modified glass ionomer cements could be potentially used in high-stress bearing areas.

关键词： setting kinetics flax fibre glass ionomer cements

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