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Stomatologija 2012; 14 (4): 103-7 244 KB

Evaluation of inorganic particles of composite resins with nanofiller content

Eduardo Gonçalves Mota, Lucas Hörlle, Hugo Mitsuo Oshima, Luciana Mayumi Hirakata

Summary

The purposes of this study were evaluate by energy dispersed X-ray (EDS) and scanning electron microscopy (SEM) the inorganic particles of three nanofilled composite resins, comparing particles sizes, shape and composition, and the filler weight content by thermogravimetric analyzes (TGA). Three composite resins classified as nanofilled were selected to this study: Esthet-X; Grandio; Filtek Supreme XT. The shade was standardized (A2) for enamel (E) or dentin (D). Ten samples with 20 mg (±10 mg) of each composite resin were submitted to thermogravimetric analyzes (TGA) in order to record the filler weight content (wt%). The amount of inorganic phase ranged from 75.75 to 87 wt%, to Esthet-X (D) and Grandio (D), respectively. The filler composition was analyzed by energy dispersed X-ray (EDS), and the size and shape were evaluated by scanning electron microscopy (SEM). The filler average size (µm) obtained by SEM were: Esthet-X (E) 1.16; Esthet-X (D) 1.39; Filtek Supreme XT (E) 0.6 (nanocluster); Filtek Supreme XT (D) 1.14 (nanocluster); Grandio (E) 2.05 and Grandio (D) 3.1. Silica (SiO₂), Ba and Al were observed through EDS. The shape of Esthet-X and Grandio fillers showed similar characteristics with high quantity of irregular inorganic particles and heterogeneous filler. However, Filtek Supreme XT showed spherical and regular particles with homogeneous distribution and sizes. Based in the analysis of nanofilled composites inorganic phase, inconsistencies of weight content, composition, shape and size can be stated between the literature and manufacturer’s instructions.

Key words: dental materials, nanotechnology, fillers, composite resin.

Received: 09 09 2009

Accepted for publishing: 21 12 2012

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

Eduardo Gonçalves Mota* – DDS, MS, PhD, assoc. prof.
Lucas Hörlle* – DDS, MS, post-graduate student in Dentistry
Hugo Mitsuo Oshima* – DDS, MS, PhD, assoc. prof.
Luciana Mayumi Hirakata* – DDS, PhD, assoc. prof.

Address correspondence to Dr. Eduardo Gonçalves Mota, Av. Ipiranga, 6681 - Building 6, Porto Alegre - Rio Grande do Sul, Brazil
ZIP: 90619-900
E-mail address: eduardo.mota@pucrs.br



	Baltic Dental and Maxillofacial Journal

December, 2012, Vol. 14, No. 4 CONTENTS 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 © 2012 Stomatologija		Stomatologija 2012; 14 (4): 103-7 244 KB Evaluation of inorganic particles of composite resins with nanofiller content Eduardo Gonçalves Mota, Lucas Hörlle, Hugo Mitsuo Oshima, Luciana Mayumi Hirakata Summary The purposes of this study were evaluate by energy dispersed X-ray (EDS) and scanning electron microscopy (SEM) the inorganic particles of three nanofilled composite resins, comparing particles sizes, shape and composition, and the filler weight content by thermogravimetric analyzes (TGA). Three composite resins classified as nanofilled were selected to this study: Esthet-X; Grandio; Filtek Supreme XT. The shade was standardized (A2) for enamel (E) or dentin (D). Ten samples with 20 mg (±10 mg) of each composite resin were submitted to thermogravimetric analyzes (TGA) in order to record the filler weight content (wt%). The amount of inorganic phase ranged from 75.75 to 87 wt%, to Esthet-X (D) and Grandio (D), respectively. The filler composition was analyzed by energy dispersed X-ray (EDS), and the size and shape were evaluated by scanning electron microscopy (SEM). The filler average size (µm) obtained by SEM were: Esthet-X (E) 1.16; Esthet-X (D) 1.39; Filtek Supreme XT (E) 0.6 (nanocluster); Filtek Supreme XT (D) 1.14 (nanocluster); Grandio (E) 2.05 and Grandio (D) 3.1. Silica (SiO₂), Ba and Al were observed through EDS. The shape of Esthet-X and Grandio fillers showed similar characteristics with high quantity of irregular inorganic particles and heterogeneous filler. However, Filtek Supreme XT showed spherical and regular particles with homogeneous distribution and sizes. Based in the analysis of nanofilled composites inorganic phase, inconsistencies of weight content, composition, shape and size can be stated between the literature and manufacturer’s instructions. Key words: dental materials, nanotechnology, fillers, composite resin. Received: 09 09 2009 Accepted for publishing: 21 12 2012 Pontifical Catholic University of Rio Grande do Sul, Porto Alegre Brazil Eduardo Gonçalves Mota – DDS, MS, PhD, assoc. prof. Lucas Hörlle* – DDS, MS, post-graduate student in Dentistry Hugo Mitsuo Oshima* – DDS, MS, PhD, assoc. prof. Luciana Mayumi Hirakata* – DDS, PhD, assoc. prof. Address correspondence to Dr. Eduardo Gonçalves Mota, Av. Ipiranga, 6681 - Building 6, Porto Alegre - Rio Grande do Sul, Brazil ZIP: 90619-900 E-mail address: eduardo.mota@pucrs.br