Evaluation of the effect of addition of polyester fiber on some mechanical properties of heat cure acrylic resin

Abstract

Background: This study aimed to evaluate the effect addition of polyester fibers on the some mechanical propertiesof heat cured acrylic resin (implant strength, flexural strength and hardness)Materials and methods: Ninety specimens were used in the study. Thirty specimens were used for impact strengthmeasurements (80mm X 10mm X 4mm) length, width and thickness respectively. The specimens divided into threetest groups (n=10), first group formed from heat cure acrylic resin without fiber reinforcement. Second group wasformed from heat cure acrylic resin was reinforced with 2 mm length polyester fiber and third group was formed fromheat cure acrylic resin reinforced with 4mm length polyester fiber, impact strength measured by impact testingdevice. 30 specimens with (65 mm X 10mm 2.5mm) length, width and thickness respectively were used in 3 groups(n=10) flexural strength test. The flexural strength was measured by using flexural testing device. 30 specimens with(65mm X 10m X 2.5mm) length width and thickness respectively were used for hardness test. The specimens weredivided into 3 group (n=10) as in impact strength and flexural strength.Hardness measured by using (shore D hardness tester TH210).Results: revealed statistically significant increase on impact strength especially on 4mm length when compared tocontrol group. Significant decreases in flexural strength of PMMP. When compared to control group with 4mm lengthfiber reinforcement. Non significant decrease when compared control group with 2mm length fiber reinforcedPMMA. Significant decrease in hardness of PMMA resin after reinforcement with 2mm, 4mm lengths polyester fibers.Conclusions: Strengthening with the polyester fiber decreased the flexural strength and hardness of the resin, butincreased impact strength. Thus when high impact acrylic resins are needed, fiber reinforced resins may be thematerial of choice