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Effect of solution condition on hydroxyapatite formation in evaluating bioactivity of B2O3 containing 45S5 bioactive glasses

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bioactive Materials 2019年第1期4卷 207-214页

作者： Xiaonan Lu Jessica Kolzow Roberto R.Chen Jincheng Du Department of Materials Science and Engineering University of North TexasDentonTX76203USA

The effects of testing solutions and conditions on hydroxyapatite(HAp)formation as a means of in vitro bioactivity evaluation of B2O3 containing 45S5 bioactive glasses were systematically *** glass samples prepared by the traditional melt and quench process,where SiO2 in 45S5 was gradually replaced by B2O3(up to 30%),were *** solutions:the simulated body fluid(SBF)and K2HPO4 solutions were used as the medium for evaluating in vitro bioactivity through the formation of HAp on glass surface as a function of *** was found that addition of boron oxide delayed the HAp formation in both SBF and K2HPO4 solutions,while the reaction between glass and the K2HPO4 solution is much faster as compared to *** addition to the composition and medium effects,we also studied whether the solution treatments(e.g.,adjusting to maintain a pH of 7.4,refreshing solution at certain time interval,and no disturbance during immersion)affect HAp *** transform infrared spectrometer(FTIR)equipped with an attenuated total reflection(ATR)sampling technique and scanning electron microscopy(SEM)were conducted to identify HAp formation on glass powder surfaces and to observe HAp morphologies,*** results show that refreshing solution every 24 h produced the fastest HAp formation for low boron-containing samples when SBF was used as testing solution,while no significant differences were observed when K2HPO4 solution was *** study thus suggests the testing solutions and conditions play an important role on the in vitro bioactivity testing results and should be carefully considered when study materials with varying bioactivities.

关键词： bioactive glasses Boron oxide In vitro Hydroxyapatite

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Effects of bioactive glasses on angiogenesis of human dental pulp cells in vitro

Effects of bioactive glasses on angiogenesis of human dental...

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中华口腔医学会第14次全国口腔医学学术会议（2012年...

作者： Siyi LIU,Yanmei DONG,Xuejun GAO Peking University School and Hospital of Stomatology,Beijing,China.

Objective To investigate the effects of bioactive glasses including 45S5 and nano-58S on angiogenic markers VEGF and bFGF secretion and gene expression of human dental pulp cells. Methods Normal impacted third molars ... 详细信息

关键词： bioactive glasses human dental pulp cells VEGF bFGF

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Nanocomposite electrospun fibers of poly(ε-caprolactone)/bioactive glass with shape memory properties

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bioactive Materials 2022年第5期7卷 230-239页

作者： Liliana Liverani Anna Liguori Paola Zezza Chiara Gualandi Maurizio Toselli Aldo R.Boccaccini Maria Letizia Focarete Department of Materials Science and Engineering University of Erlangen-NurembergCauerstr.691058ErlangenGermany Department of Chemistry“Giacomo Ciamician”and INSTM UdR of Bologna University of Bolognavia Selmi 240126BolognaItaly Interdepartmental Center for Industrial Research on Advanced Applications in Mechanical Engineering and Materials Technology CIRI-MAMUniversity of BolognaViale Risorgimento240136BolognaItaly Department of Industrial Chemistry“Toso Montanari” University of BolognaViale Risorgimento 440136BolognaItaly Health Sciences and Technologies–Interdepartmental Center for Industrial Research(HST-ICIR) Alma Mater Studiorum-Universit`a di Bologna40064Ozzano dell’EmiliaBolognaItaly

Electrospun fibers of shape memory triethoxysilane-terminated poly(epsilon-caprolactone)(PCL-TES)loaded with bioactive glasses(BG)are here *** PCL-TES,as well as PCL/BG nanocomposite fibers,are also considered for *** is proposed that hydrolysis and condensation reactions take place between triethoxysilane groups of the polymer and the silanol groups at the BG particle surface,thus generating additional crosslinking points with respect to those present in the PCL-TES *** as-spun PCL-TES/BG fibers display excellent shape memory properties,in terms of shape fixity and shape recovery ratios,without the need of a thermal crosslinking *** particles confer in vitro bioactivity to PCL-based nanocomposite fibers and favor the precipitation of hydroxycarbonate apatite on the fiber *** cytocompatibility tests demonstrate that the addition of BG particles to PCL-based polymer does not inhibit ST-2 cell *** novel approach of using bioactive glasses not only for their biological properties,but also for the enhancement of shape memory properties of PCL-based polymers,widens the versatility and suitability of the obtained composite fibers for a huge portfolio of biomedical applications.

关键词： PCL-TES bioactive glasses Bioactivity Shape memory polymers Electrospinning Benign solvents

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Hybrid gelatin/oxidized chondroitin sulfate hydrogels incorporating bioactive glass nanoparticles with enhanced mechanical properties, mineralization, and osteogenic differentiation

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bioactive Materials 2021年第3期6卷 890-904页

作者： Lei Zhou Lei Fan Feng-Miao Zhang Yuhe Jiang Min Cai Cong Dai Yi-An Luo Ling-Jie Tu Zheng-Nan Zhou Xiao-Jun Li Cheng-Yun Ning Kai Zheng Aldo R.Boccaccini Guo-Xin Tan Institute of Chemical Engineering and Light Industry Guangdong University of TechnologyGuangzhou510006China Institute of Biomaterials Department of Materials Science and EngineeringUniversity of Erlangen-NurembergCauerstrasse 691058ErlangenGermany School of Materials Science and Engineering South China University of TechnologyGuangzhou510641China College of Arts and Sciences Stony Brook University100 Nicolls RoadStony BrookNY11794United States Department of Prosthodontics Hospital of StomatologyGuanghua School of StomatologySun Yat-sen UniversityGuangzhou510055China

Biopolymer based hydrogels are characteristic of their biocompatibility and capability of mimicking extracellular matrix structure to support cellular ***,these hydrogels suffer from low mechanical properties,uncontrolled degradation,and insufficient osteogenic activity,which limits their applications in bone *** this study,we developed hybrid gelatin(Gel)/oxidized chondroitin sulfate(OCS)hydrogels that incorporated mesoporous bioactive glass nanoparticles(MBGNs)as bioactive fillers for bone ***-OCS hydrogels could be self-crosslinked in situ under physiological conditions in the presence of *** incorporation of MBGNs enhanced the crosslinking and accelerated the *** gelation time decreased with increasing the concentration of MBGNs *** of MBGNs in the hydrogels significantly improved the mechanical properties in terms of enhanced storage modulus and compressive *** injectability of the hydrogels was not significantly affected by the MBGN ***,the proliferation and osteogenic differentiation of rat bone marrow mesenchymal stem cells in vitro and rat cranial defect restoration in vivo were significantly promoted by the hydrogels in the presence of *** hybrid Gel-OCS/MBGN hydrogels show promising potential as injectable biomaterials or scaffolds for bone regeneration/repair applications given their tunable degradation and gelation behavior as well as favorable mechanical behavior and osteogenic activities.

关键词： Hydrogels bioactive glasses Biopolymers Hybrids Bone regeneration

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