Two-step sinter-crystallization of K2O-CaO-P2O5-SiO2 (45S5-K) bioactive glass

Autor(es)

Silva, Lais D. ^{[1, 2]} ; Puosso, Fernanda C. ^[2] ; Soares, Viviane O. ^[3] ; Filho, Oscar Peitl ^[2] ; Sabino, Simone do R. F. ^[4] ; Serbena, Francisco C. ^[4] ; Crovace, Murilo C. ^[2] ; Zanotto, Edgar D. ^{[1, 2]}

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Postgrad Program Mat Sci & Engn, PPG, CEM, BR-13565905 Sao Carlos, SP - Brazil

^[2] Fed Univ Sao Carlos UFSCar, Dept Mat Engn DEMa, Ctr Res Technol & Educ Vitreous Mat, CeRTEV, BR-13565905 Sao Carlos, SP - Brazil

^[3] State Univ Maringa UEM, Dept Sci, BR-87360000 Goioere, PR - Brazil

^[4] State Univ Ponta Grossa UEPG, Dept Phys, BR-84030900 Ponta Grossa, PR - Brazil

• Tipo de documento: Artigo Científico
• Fonte: CERAMICS INTERNATIONAL; v. 47, n. 13, p. 18720-18731, JUL 1 2021.
• Citações Web of Science: 0

Resumo

Bioactive glasses and glass-ceramics (GCs) effectively regenerate bone tissue, however most GCs show improved mechanical properties. In this work, we developed and tested a rarely studied bioactive glass composition (24.4K2O-26.9CaO-46.1SiO2-2.6P2O5 mol%, identified as 45S5-K) with different particle sizes and heating rates to obtain a sintered GC that combines good fracture strength, low elastic modulus, and bioactivity. We analyzed the influence of the sintering processing conditions in the elastic modulus, Vickers microhardness, density, and crystal phase formation in the GC. The best GC shows improved properties compared with its parent glass. This glass achieves a good densification degree with a two-step viscous flow sintering approach and the resulting GC shows as high bioactivity as that of the standard 45S5 Bioglass (R). Furthermore, the GC elastic modulus (56 GPa) is relatively low, minimizing stress shielding. Therefore, we unveiled the glass sintering behavior with concurrent crystallization of this complex bioactive glass composition and developed a potential GC for bone regeneration. (AU)

• Processo FAPESP: 13/07793-6 - CEPIV - Centro de Ensino, Pesquisa e Inovação em Vidros
• Beneficiário: Edgar Dutra Zanotto
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs