Addition of mechanically processed cellulosic fibers to ionomer cement: mechanical properties

Abstract

In this study, conventional restorative glass ionomer cement (GIC) was modified by embedding it with mechanically processed cellulose fibers. Two concentrations of fibers were weighed and agglutinated into the GIC during manipulation, yielding Experimental Groups 2 (G2; 3.62 wt% of fibers) and 3 (G3; 7.24 wt% of fibers), which were compared against a control group containing no fibers (G1). The compressive strengths and elastic modulus of the three groups, and their diametral tensile strengths and stiffness, were evaluated on a universal test machine. The compressive and diametral tensile strengths were significantly higher in G3 than in G1. Statistically significant differences in elastic modulus were also found between G2 and G1 and between G2 and G3, whereas the stiffness significantly differed between G1 and G2. The materials were then characterized by scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). Heterogeneously shaped particles were found on the G2 and G3 surfaces, and the cement matrices were randomly interspersed with long intermingled fibers. The EDS spectra of the composites revealed the elemental compositions of the precursor materials. The physically processed cellulosic fibers (especially at the higher concentration) increased the compressive and diametral tensile strengths of the GIC, and demonstrated acceptable elastic modulus and stiffness.

Incorporation of cellulose fiber in glass ionomer cement

“…In general, our results are in agreement with previous laboratory studies by Silva et al ., who showed that addition of cellulose fibers (average length 1 mm) resulted in improved mechanical properties for conventional GICs . However, in contrast to our results, they reported that the compressive strength values of fiber‐reinforced GIC were almost double those of their unmodified GIC.…”

Synergistic effects of titanium dioxide and cellulose on the properties of glassionomer cement

“…This material has been widely used as different types of scaffolds in tissue engineering owing to its toughness, minimal cell flattening, and high rigidity 28) . Silva et al 29,30) demonstrated that nano-cellulose fibers could enhance the mechanical properties of GIC due to their high specific area as well as the strong hydrogen bonds in their web-like structure.…”

Influence of Porous Spherical-Shaped Hydroxyapatite on Mechanical Strength and Bioactive Function of Conventional Glass Ionomer Cement

“…Accordingly, we selected HAp200, which has a typical hexagonal crystal shape. In addition, some researchers have reported that cellulosic fibers improve the mechanical properties of GIC, including its compressive or diametrical tensile strength [28,29]. In our study, celluloses having either porous or spherical characteristics, UF-711 and CP-203, were also compared with HApS.…”