Effect of Bombyx mori silk-fiber volume on flexural strength of fiber-reinforced composite

Aria Fransiska; Siti Sunarintyas; Rini Dharmastiti

doi:10.22146/majkedgiind.25186

Effect of Bombyx mori silk-fiber volume on flexural strength of fiber-reinforced composite

https://doi.org/10.22146/majkedgiind.25186

Aria Fransiska^(1*), Siti Sunarintyas⁽²⁾, Rini Dharmastiti⁽³⁾

(1) Department of Prosthodontics and Dental Materials, Universitas Andalas, Padang, West Sumatra
(2) Department of Dental Biomaterials, Universitas Gadjah Mada, Yogyakarta
(3) Department of Mechanical and Industrial Engineering, Universitas Gadjah Mada, Yogyakarta
(*) Corresponding Author

Abstract

Dental glass fiber is one of dental synthetic fibers that are widely used in dentistry as a dental resin reinforcement, such as in dentin replacement material. The availability of glass fiber is limited in Indonesia because it must be imported and relatively expensive. Bombyx mori silk-fiber is one of the strongest natural fiber derived from silkworm cocoon processing. Silk-fiber is used in medical applications as a post-surgical sutures, scaffolds for tissue engineering and drug delivery. The purpose of this study was to evaluate the effect of Bombyx mori silk-fiber volume on the flexural strength of fiber-reinforced composite (FRC). We used Bombyx mori silk-fiber (Perhutani Pati, Central Java, Indonesia) and flowable composite (Charmfil flow, Denkist, Korea) in this study. The FRC samples were divided into 4 groups consisting of fiber volumes of 0%, 5%, 10% and 15% (n = 4). Tests of flexural strength were performed according to ISO 4049. The results were analyzed using one way ANOVA (p<0.05). The study showed that the means of the flexural strength (MPa) of Bombyx mori silk-fiber FRC for volume of 0%, 5%, 10% and 15% were 149.2 ± 5.5; 127.6 ± 3.8; 110.9 ± 3.5; 71.2 ± 4.2. One-way ANOVA test showed that the means of FRC flexural strength on the four groups’ silk-fiber Bombyx mori volumetric were significantly different (p<0.05). This study concluded that Bombyx mori silk-fiber volumetric influences the flexural strength of fiber- reinforced composite. An increase in Bombyx mori silk-fiber volume decreases the flexural strength of FRC because there is a small gap due to the weak interfacial bonds between dental flowable composite and Bombyx mori silk-silk-fiber.

Keywords

Bombyx mori silk-fiber; flexural strength; volume

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DOI: https://doi.org/10.22146/majkedgiind.25186