• Title/Summary/Keyword: Bioactive glass

Search Result 52, Processing Time 0.026 seconds

Porous bioactive glass ceramics for bone-tissue regeneration

  • Yun, Hui-Suk;Kim, Seung-Eon
    • Proceedings of the Materials Research Society of Korea Conference
    • /
    • 2009.11a
    • /
    • pp.7.2-7.2
    • /
    • 2009
  • Nanoporous bioactive glass(NBG) ceramic with well interconnected pore structures were fabricated bytriblock copolymer templating and sol-gel techniques. Hierarchically porous BGbeads were also successfully synthesized by controlling the condition of solvent.The beads have hierarchically nano- and macro-pore structure with a sizesbetween several tens nanometers and several hundred micrometers. Both NBG andBG beads show superior bone-forming bioactivity and good in vitrobiodegradability. Biocompatibility both in vitro and in vivo were examed andwas revealed that it largely relies on the pore morphology as well ascomposition. Our synthetic process can be adapted for the purpose of preparingvarious bioceramics, which have excellent potential applications in the fieldof biomaterials such as tissue engineering and drug storage.

  • PDF

Biocompatibility of 13-93 Bioactive Glass-SiC Fabric Composites

  • Park, Jewon;Na, Hyein;Choi, Sung-Churl;Kim, Hyeong-Jun
    • Journal of the Korean Ceramic Society
    • /
    • v.56 no.2
    • /
    • pp.205-210
    • /
    • 2019
  • Bioactive glass (BG) finds limited use as a bone replacement material owing to its low mechanical properties. In order to solve this problem, the micro-sized 13-93 BG was prepared as a fabric composite with SiC microfibers, and its mechanical properties and biocompatibility were investigated in this study. The tensile strengths of BG-SiC fiber-bundle composites increased in proportion to the number of SiC fibers. In particular, even when only one SiC fiber was substituted, the tensile strength increased by 81% to 1428 MPa. In the early stage of the in-vitro test, a silica-rich layer was formed on the surface of the 13-93 BG fibers. With time, calcium phosphate grew on the silica-rich layer and the BG fibers were delaminated. On the other hand, no products were observed on the SiC fibers for 7 days, therefore, SiC fibers are expected to maintain their strength even after transplantation in the body.

Current aspects and prospects of glass ionomer cements for clinical dentistry

  • Park, Eun Young;Kang, Sohee
    • Journal of Yeungnam Medical Science
    • /
    • v.37 no.3
    • /
    • pp.169-178
    • /
    • 2020
  • Glass ionomer cement (GIC) is a tailor-made material that is used as a filling material in dentistry. GIC is cured by an acid-base reaction consisting of a glass filler and ionic polymers. When the glass filler and ionic polymers are mixed, ionic bonds of the material itself are formed. In addition, the extra polymer anion reacts with calcium in enamel or dentin to increase adhesion to the tooth tissue. GICs are widely used as adhesives for artificial crowns or orthodontic brackets, and are also used as tooth repair material, cavity liner, and filling materials. In this review, the current status of GIC research and development and its prospects for the future have been discussed in detail.