Effect of discontinuous glass fibers on mechanical properties of glass ionomer cement. Issue 1 (1st January 2018)

• Record Type: Journal Article
• Authors: Garoushi, Sufyan K.; He, Jingwei; Vallittu, Pekka K.; Lassila, Lippo V. J.
• Is Part Of: Acta biomaterialia odontologica Scandinavica. Volume 4:Issue 1(2018)
• Page Start: 72
• Page End: 80
• Publication Date: 2018-01-01
• Subjects: Mechanical properties -- discontinuous fiber reinforcement -- glass ionomer cement
• DOI: 10.1080/23337931.2018.1491798
• Languages: English
• ISSNs: 2333-7931

Abstract

Abstract: Aim: This study investigated the reinforcing effect of discontinuous glass microfibers with various loading fractions on selected mechanical properties of self-cure glass ionomer cement (GIC). Method: Experimental fiber reinforced GIC (Exp-GIC) was prepared by adding discontinuous glass microfiber (silane/non-silane treated) of 200–300 µm in length to the powder of self-cure GIC (GC Fuji IX) with various mass ratios (15, 20, 25, 35, and 45 mass%) using a high speed mixing device. Flexural strength, flexural modulus, work of fracture, compressive strength and diametral tensile strength were determined for each experimental and control materials. The specimens ( n = 8) were wet stored (37 °C for one day) before testing. Scanning electron microscopy equipped with energy dispersive spectrometer was used to analysis the surface of silanized or non-silanized fibers after treated with cement liquid. The results were analyzed with using multivariate analysis of variance MANOVA. Results: Fiber-reinforced GIC (25 mass%) had significantly higher mechanical performance of flexural modulus (3.8 GPa), flexural strength (48 MPa), and diametral tensile strength (18 MPa) ( p < .05) compared to unreinforced material (0.9 GPa, 26 MPa and 8 MPa). No statistical significant difference in tested mechanical properties was recorded between silanized and non-silanized Exp-GIC groups. Compressive strength did not show any significant differences ( p > .05) between the fiber-reinforced and unreinforced GIC. Conclusion: The use of discontinuous glass microfibers with self-cure GIC matrix considerably increased the all of the studied properties except compressive strength.