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   Effect of green propolis addition to physical-mechanical properties of glass ionomer cements  
   
نویسنده troca v.b.p.b. ,fernandes k.b.p. ,terrile a.e. ,marcucci m.c. ,de andrade f.b. ,wang l.
منبع journal of applied oral science - 2011 - دوره : 19 - شماره : 2 - صفحه:100 -105
چکیده    Objective: this study investigated the mechanical properties of glass ionomer cements (glcs) combined with propolis as a natural antimicrobial substance. material and methods: typified 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 glcs. 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). results: the 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. conclusion: it may be concluded that incorporation of propolis to gics alters some properties in a material-dependent condition.
کلیدواژه Glass ionomer cements; Propolis; Solubility; Tensile strength
آدرس university of north paraná,londrina,pr, Brazil, department of operative dentistry,school of dentistry,university north of paraná,londrina,pr, Brazil, university technologic federal of paraná,londrina,pr, Brazil, university of bandeirantes,são paulo,sp, Brazil, department of operative dentistry,endodontics and dental materials,bauru school of dentistry,university of são paulo,bauru,sp, Brazil, department of operative dentistry,endodontics and dental materials,bauru school of dentistry,university of são paulo,bauru,sp, Brazil
 
     
   
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