Effects of cellulose fibers on the physical and chemical properties of glass ionomer dental restorative materials

Menezes-Silva, Rafael; Santos, Palacios; Souza, Luciana Bronzi de; Dumont, Vitor César; Soares, Janir Alves; Santos, Maria Helena

doi:10.1016/j.materresbull.2012.10.016

Cited by 21 publications

(21 citation statements)

References 43 publications

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“…Contrary to Silva et al,9 who reported no difference between ionomer cements modified by macro cellulose fibers and conventional GIC, the diametral tensile strengths of the new composites investigated in the present study were almost double those of their unmodified counterparts. We attribute this difference to the mechanical processing of the fibers in our study.…”

Section: Discussioncontrasting

confidence: 99%

“…7 To reduce its friability (and increase its compressive strength), glass ionomer cement must be supplemented with cellulosic fibers of the ideal size and concentration. 9 In addition, the cement must be sufficiently viscous to facilitate manipulation while preserving the capacity for wetting the dental structure, which is crucial for effective bonding. 7 SEM is ideal for imaging and analyzing material surfaces, since it reveals features such as fracture areas, 22,23,24 whereas EDS identifies the elemental compositions of materials, particles, and contaminants on these surfaces.…”

Section: Discussionmentioning

confidence: 99%

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

et al. 2015

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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.

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Section: Discussioncontrasting

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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

et al. 2015

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“…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.…”

Section: Discussioncontrasting

confidence: 99%

Incorporation of cellulose fiber in glass ionomer cement

Garoushi

Obradovic

et al. 2020

European J Oral Sciences

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This study investigated the effect of discontinuous cellulose microfibers with various loading fractions on selected physical properties of glass polyalkenoate (glass ionomer) cement (GIC). Fiber‐reinforced GIC (Exp‐GIC) was prepared by adding discontinuous cellulose microfiber (with an average length of 500 μm) at various mass ratios (1, 2, 3, 4, and 5 mass%) to the powder of conventional GIC (GC Fuji IX) using a high‐speed mixing device. Fracture toughness, work of fracture, and compressive strength were determined for each experimental and control material. The specimens (n = 6) were wet stored (37°C for 1 d) before testing. A scanning electron microscope equipped with an energy dispersive spectroscope was used to examine the surface of fibers after treatment with cement liquid. Data were analyzed using ANOVA. The Exp‐GIC (5 mass%) specimen had statistically significantly higher fracture toughness (0.9 MPa.m1/2) than unreinforced material (0.4 MPa.m1/2). On the other hand, Exp‐GIC with 1 mass% displayed the highest compressive strength (116 MPa) among all tested groups. The use of discontinuous cellulose microfibers with conventional GIC matrix considerably increased the toughening performance compared with the particulate GICs used.

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“…Cellulose, silks fiber, and flax fiber have been employed in designing biomaterials for medical applications. Cellulose fibers were introduced into GIC by Silva et al who aimed to improve the mechanical strength of this promising restorative materials . An increase in the compressive and diametral tensile strengths was reported in the cellulose fiber incorporated GICs (7.24 wt% of fibers) compared to non‐incorporated GICs.…”

Section: Introductionmentioning

confidence: 99%

Modification of glass ionomer cements on their physical‐mechanical and antimicrobial properties

Ching

Luddin

Kannan

et al. 2018

J Esthet Restor Dent

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Objective The aim of this review was to provide an insight about the factors affecting the properties of glass ionomer cements and provides a review regarding studies that are related to modification of glass ionomer cements to improve their properties, particularly on physical‐mechanical and antimicrobial activity. Methods PubMed and Science Direct were searched for papers published between the years 1974 and 2018. The search was restricted to articles written in English related to modification of glass ionomer cements. Only articles published in peer‐reviewed journals were included. The search included literature reviews, in vitro, and in vivo studies. Articles written in other languages, without available abstracts and those related to other field were excluded. About 198 peer‐review articles in the English language were reviewed. Conclusion Based on the finding, most of the modification has improved physical‐mechanical properties of glass ionomer cements. Recently, researchers have attempted to improve their antimicrobial properties. However, the attempts were reported to compromise the physical‐mechanical properties of modified glass ionomer cements. Clinical significance As the modification of glass ionomer cement with different material improved the physical‐mechanical and antimicrobial properties, it could be used as restorative material for wider application in dentistry.

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Effects of cellulose fibers on the physical and chemical properties of glass ionomer dental restorative materials

Cited by 21 publications

References 43 publications

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

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

Incorporation of cellulose fiber in glass ionomer cement

Modification of glass ionomer cements on their physical‐mechanical and antimicrobial properties

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