Comparison of denture base resin reinforced with polyaromatic polyamide fibers of different orientations

Abstract

The aim of this study was to evaluate the effect of reinforcing polyaromatic polyamide (aramid) fibers with various orientations on the flexural properties of denture base resin. Aramid fibers with four orientations of unidirectional, woven, non-woven and paper-type were pre-impregnated and placed at the bottom of a specimen mold. Heat-polymerized denture base resin was packed over the fibers and polymerized. A three-point bending test was performed using a universal testing machine at a crosshead speed of 5 mm/min. The flexural strengths and flexural moduli of the unidirectional and woven groups were significantly higher than those of the control and other experimental groups. For the flexural moduli, all experimental groups showed significantly higher reinforcing effects than the control group. In conclusion, the unidirectional group located perpendicular to the direction of the load was most effective in reinforcing the denture base resin, followed by the woven group.

Mechanical strength evaluation of poly(methyl methacrylate) reinforced with long glass, carbon and aramid fibers

“…The increased strength of acrylic material reinforced with aramid fibers was confirmed by many authors [17,19,20]. The use of Kevlar fiber bundles resulted in increased strength of the reinforced PMMA by 30 % on average, which has been confirmed by our tests.…”

“…Aramid fibers are the state-of-the-art high-resistant artificial fibers. In comparison to glass fiber composite mate rials broadly used in the technology, aramid fiber composite materials are characterized by good resistance to corrosion and possible reduction of material weight by 15 % [19].…”

“…The use of Kevlar fiber bundles resulted in increased strength of the reinforced PMMA by 30 % on average, which has been confirmed by our tests. Due to small weight, these fibers, at specific weight content in material, significantly increased its bending resistance in comparison to carbon or glass fibers [19].…”

“…They cover the occlusal loading range of the denture plate, reaching 120 N. This range is limited with the pain threshold, in particular at the section of premolars and molars, where the maxi- [18]. The majority of research centers test PMMA reinforced with one type of fibers only [17][18][19][20][21]. In this paper, samples reinforced with glass-aramid and carbon-aramid hybrids were additionally tested.…”

PMMA denture base material enhancement: a review of fiber, filler, and nanofiller addition

“…Aramid fiberreinforced denture base resin was found biocompatible, and additionally its flexural strength and flexural modulus were increased. 17 However, the hardness of the resin decreased with increasing fiber concentration. Also, its yellow color is considered a drawback.…”