Abstract
ObjectiveThis study investigated the mechanical properties of glass ionomer cements (GICs) combined with propolis as a natural antimicrobial substanceMaterial and MethodsTypified green propolis, as an ethanolic extract (EEP) or in the lyophilized form (powder), was incorporated to specimens of Ketac Fil Plus, ChemFlex and Ketac Molar Easymix GICs. For each test, 8 specimens of each material were prepared. For water sorption and solubility tests, specimens were subjected to dehydration, hydration and re-dehydration cycles until a constant mass was obtained for each step. Measurements were recorded using a digital balance of 10-4 g precision. For the diametral tensile strength test, specimens were tested in a universal test machine at 0.5 mm/min crosshead speed after 24 h storage in deionized water. Data were evaluated by one-way ANOVA and Tukey’s tests (p<0.05).ResultsThe addition of propolis to GIC clearly increased water sorption compared to pure material. Solubility was material-dependent and was not clearly evident. For the diametral tensile strength test, association with propolis altered negatively only Chemflex.ConclusionIt may be concluded that incorporation of propolis to GICs alters some properties in a material-dependent condition.
Highlights
New approaches, techniques and materials have focused on maximum prevention and minimally invasive procedures in Dentistry
The null hypothesis was that there is no difference in material performance, with or without propolis
Glass ionomer cement (GIC) associated with lyophilized propolis or EEP showed VLJQL¿FDQWO\ PRUH ZDWHU VRUSWLRQ WKDQ HDFK SXUH group (P
Summary
New approaches, techniques and materials have focused on maximum prevention and minimally invasive procedures in Dentistry. GIC has satisfactory biocompatibility and antimicrobial potential, which make this material attractive5 Due to this antimicrobial property the association of known antimicrobial substances, such as propolis, chlorhexidine and antibiotics to GICs has been extensively investigated. 'HVSLWH WKHVH EHQH¿WV WKHUH DUH RQO\ IHZ UHSRUWV about the addition of propolis to GIC7,19,30 These investigations have focused on antimicrobial effects, but physical-mechanical properties have been overlooked. This study aimed at investigating the effect of 2 GLIIHUHQW IRUPV RI W\SL¿HG JUHHQ SURSROLV ((3 DQG lyophilized (L), associated with one conventional GIC and two high-density GICs, regarding mechanical properties. The null hypothesis was that there is no difference in material performance (water sorption, solubility, and diametral tensile strength test), with or without propolis
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