Tensile strength of provisional zinc oxide cement reinforced with 23% ethanolic propolis extract in upper premolar teeth, at the Universidad Nacional Pedro Henríquez Ureña, May-August 2023 period. In vitro study
Description
Introduction. The study investigated the tensile strength of temporary zinc oxide cement reinforced with 23% ethanolic extract of propolis in upper premolars. Hypothesis Formulation Propolis extract 23% binds to zinc oxide temporary cement without significantly altering the tensile strength properties. Results Group A showed a tensile strength of 12.3 ± 6.5 MPa and a maximum load of 118 ± 58N. Group B showed a resistance of 15.9 ± 3.2 MPa and a maximum load of 134 ± 47N. No statistically significant differences (P>0.05) were found between the groups according to the Wilcoxon test. Conclusions The addition of 23% ethanolic extract of propolis to zinc oxide temporary cement does not significantly modify the tensile properties.
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Methods. Thirty human upper premolars mounted on acrylic blocks were used with temporary crowns fabricated from a siliconized guide with condensation silicone. The teeth were divided into two groups: group A (control) with eugenol-free provisional cement and group B (experimental) with the same cement plus propolis extract. The tensile test was performed with an Instrom 3369 universal machine.