Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Analysis of mechanical properties and solubility of phosphate glasses with different additions of MgO
Submission Author:
Denise Stolle da Luz Weiss , PR
Co-Authors:
Paulo Soares, Denise Stolle da Luz Weiss
Presenter: Denise Stolle da Luz Weiss
doi://10.26678/ABCM.COBEM2017.COB17-2430
Abstract
Bioresorbable materials are desirable components for applications such as temporary implants, as they degrade in a controlled manner until completion of the osseointegration of the bone, eliminating the need of a second surgery to remove them. Phosphate based glasses (PBG) have properties that allow them to be used as hard tissue substitutes with the advantage of being resorbable. Incorporation of strontium into PBG has been widely studied due to be considered a bone formation stimulator. Although strontium phosphate glasses have better cellular response, their degradation rate is higher. Some studies show that the addition of MgO significantly reduces the degradation rate of soluble phosphate glasses. Furthemore, the oxide interferes with the chemical structure of the glass, and consequently improve the mechanical properties of the same. Therefore, our aim was to evaluate the effect of different additions of MgO on a phosphate glass and, consequently, on its degradation behavior, hardness, elastic modulus and fracture toughness. Our results showed that the glass structure was modified by the dopant, becoming more rigid, and consequently, decreasing the glass dissolution, with an increase of hardness, elastic modulus, and fracture toughness.
Keywords
bioglass, phosphate glass, temporary implants, Mechanical Properties
