Effect of Thermocycling and Polyethylene Fibre Addition on Impact and Transversal Strength of Heat Cured Acrylic Resin Denture Base Material
نویسندگان
چکیده
Background: Heat cured acrylic resin is the most widely used material in the manufacture ofdenture base, but has mechanical properties weakness (transversal strength and impact strength). Alternative to increase the mechanical properties of acrylic resin is the utilization of reinforcing fibre that is polyethylene fibre that has advantage such as good aesthetic, easy to manipulate and increase mechanical strength. Purpose:This study was aimed to determine thermocycling effect on impact and transversal strength of heat cured acrylic resin denture base material without and with Ribbond THM and Ribbond Ultra polyethylene fibre addition, also to determine the effect of Ribbond THM and Ribbond Ultra fibre addition to impact and transversal strength of heat cured acrylic resin denture base material without and with thermocycling. Material and Method: This is an experimental laboratory study. Samples for impact and transversal strength 30 samples each fabricated in Unit UJI Laboratorium Dental FKG USU. Thermocycling effect to impact and transversal strength of heat cured acrylic resin denture base material with and without polyethylene fibre addition was analyzed with T test.The effect of polyethylene fibre addition to impact and transversal strength of heat cured acrylic resin denture base material without and with thermocycling analyzed with One Way ANOVA. LSD analysis then performed to see which polyethylene fibre has the best effect to impact and transversal strength of heat cured acrylic resin. Result:The result showed there was thermocycling effect to impact strength value of heat cured acrylic resin denture base material without Ribbond THM and Ribbond Ultra fibre addition. There was thermocycling effect to transversal strength value of heat cured acrylic resin denture base material with Ribbond THM addition. There was an effect of polyethylene fibre addition to heat cured acrylic resin denture base material without and with thermocycling to impact and transversal strength. Conclusion:Significant effect from impact and transversal strength of heat cured denture base material given Ribbond THM polyethylene fibre addition could still be accepted although there was decrease in the impact and transversal strength after thermocycling. Denture base given polyethylene fibre reinforcing material would increase its mechanical properties thus increasing the clinical utilization of heat cured acrylic denture.
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