Evaluation of the Addition of Tea Tree Oil on Some Mechanical Properties of Heat Cured Acrylic Resin

Abstract

Objectives: the objective of this study was to evaluate the effect of tea tree oil on impact strength; transverse strength and hardness of heat cured acrylic. Materials and procedures: Total number of (80) specimens have been intended .Twenty samples have been prepared without additive (control) and (60) samples were prepared with incorporation of tea tree oil in three different concentrations (10%, 15%, and 20%).Results: the result showed a significant difference between control and experimental groups in the transverse strength and hardness tests while there was no significant difference between control and addition groups in impact strength test. The addition of tea tree oil (T.T.O) decreased the hardness in all different concentrations, and increased the transverse strength at concentration of 20%.Conclusion: The addition of 20% tea tree oil to acrylic resin decreased its hardness, increased the transverse strength, and showed no significant difference in impact strength.