SCIENTIFIC ARTICLES

Evaluation of inorganic particles of composite resins with nanofiller content
Eduardo Gonçalves Mota, Lucas Hörlle, Hugo Mitsuo Oshima, Luciana Mayumi Hirakata
103-107

Adaptation and Validation of the Early Childhood Oral Health Impact Scale in Lithuania
Birutė Jankauskienė, Julija Narbutaitė, Ričardas Kubilius, Alvydas Gleiznys
108-113

Influence of the temperature on the cement disintegration in cement-retained implant restorations
Tomas Linkevicius, Egle Vindasiute, Algirdas Puisys, Laura Linkeviciene, Olga Svediene
114-117

Pain and discomfort perception among patients undergoing orthodontic treatment: Results from one month follow-up study
Aiste Kavaliauskiene, Dalia Smailiene, Ieva Buskienė, Daiva Keriene
118-125

Evaluation of Mechanical Properties on three Nanofilled Composites
Rogério Simões Rosa, Eduardo Blando, Eduardo Gonçalves Mota, Hugo Mitsuo Silva Oshima, Luciana Hirakata, Roberto Hübler, Carlos Eduardo Agostini Balbinot, Luis Antonio Gaieski Pires
126-130

Stomatologija 2012; 14 (4): 126-30 108 KB

Evaluation of mechanical properties on three
nanofilled composites

Rogério Simões Rosa, Carlos Eduardo Agostini Balbinot, Eduardo Blando, Eduardo Gonçalves Mota, Hugo Mitsuo Silva Oshima, Luciana Hirakata, Luis Antonio Gaieski Pires, Roberto Hübler

Summary

The purpose of this study was to evaluate the mechanical behavior of three composites with nanoparticles Filtek Z350 XT (3M ESPE), Esthet X (Dentsply), Grandio (Voco) in enamel and body shades (A2) trough nanohardness, elastic modulus, compressive strength test, flexural strength test, diametral tensile strength, flexural modulus, weight filler content and Knoop microhardness. One sample of each material was submitted to nanohardness and elastic modulus. Five values of ten indentations were considered valids inside confidence intereval. Ten samples of each material were submitted to compressive strength, flexural strength and diametral tensile strength test at universal testing machine. The flexural modulus test was calculated based on flexural strength results. Ten samples of each group were submitted to knoop microhardness test. The results were submitted to ANOVA and Tukey statistical tests. The highest inorganic weight filler content for Grandio was registered after the organic mould decomposition. After statistical analysis Grandio showed the highest averages for nanohardness, elastic modulus, flexural modulus and knoop microhardness. For diametral tensile strength Grandio and Filtek Z350 XT obtained the highest averages. The tested composite resins ranged similar medias statistically for compressive strength. For flexural strength Filtek Z350 XT and Esthet X showed the highest averages. The results suggest that the weight filler content, the filler size and shape and the contact surface between nanofillers and organic phase has direct relation with composite resins with nanoparticles mechanical properties. Further studies should be carried out to improve the knowledge of composites with nanoparticles mechanical behavior.

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*Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Brazil

Rogério Simões Rosa* – D.D.S., M.S., PhD

Carlos Eduardo Agostini Balbinot* – D.D.S., M.S., graduate program student
Eduardo Blando* – PHYS, M.S., PhD
Eduardo Gonçalves Mota* – D.D.S., M.S., PhD, assoc. prof.
Hugo Mitsuo Silva Oshima* – D.D.S., M.S., PhD, assoc. prof.
Luciana Hirakata* – D.D.S., M.S., PhD, assoc. prof.
Luis Antonio Gaieski Pires – D.D.S., M.S., PhD
Roberto Hübler* – PHYS, M.S., PhD, assoc. prof.

Address correspondence to Dr. Rogério Simões Rosa, Dental clinical, Mostardeiro, 333/602, Porto Alegre, Rio Grande do Sul, Brazil, ZIP: 90430-001.
E-mail address: rgsrosa@yahoo.com.br