The filler content of the dental composite resins and their influence on different properties

Autor(es)

Rastelli, Alessandra N. S. ^[1] ; Jacomassi, Denis P. ^[2] ; Faloni, Ana Paula S. ^[1] ; Queiroz, Thallita P. ^[1] ; Rojas, Seila S. ^[3] ; Bernardi, Maria Ines B. ^[3] ; Bagnato, Vanderlei S. ^[2] ; Hernandes, Antonio C. ^[3]

Afiliação do(s) autor(es)

^[1] Araraquara Ctr Univ UNIARA, Sch Dent, Dept Hlth Sci, Implantol Post Grad Course, BR-14807120 Sao Paulo - Brazil

^[2] Univ Sao Paulo, Phys Inst Sao Carlos, Biophoton Lab, Opt Grp, Sao Paulo - Brazil

^[3] Univ Sao Paulo, Phys Inst Sao Carlos, Grp Crescimento Cristais & Mat Ceram, Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: MICROSCOPY RESEARCH AND TECHNIQUE; v. 75, n. 6, p. 758-765, JUN 2012.
• Citações Web of Science: 19

Resumo

The purpose of this study was to compare the inorganic content and morphology of one nanofilled and one nanohybrid composite with one universal microhybrid composite. The Vickers hardness, degree of conversion and scanning electron microscope of the materials light-cured using LED unit were also investigated. One nanofilled (Filtek (TM) Supreme XT), one nanohybrid (TPH (R) 3) and one universal microhybrid (Filtek (TM) Z-250) composite resins at color A2 were used in this study. The samples were made in a metallic mould (4 mm in diameter and 2 mm in thickness). Their filler weight content was measured by thermogravimetric analysis (TG). The morphology of the filler particles was determined using scanning electron microscope equipped with a field emission gun (SEM-FEG). Vickers hardness and degree of conversion using FT-IR spectroscopy were measured. Filtek (TM) Z-250 (microhybrid) composite resin shows higher degree of conversion and hardness than those of Filtek (TM) Supreme XT (nanofilled) and TPH (R) 3 (nanohybrid) composites, respectively. The TPH3 (R) (nanohybrid) composite exhibits by far the lowest mechanical property. Nanofilled composite resins show mechanical properties at least as good as those of universal hybrids and could thus be used for the same clinical indications as well as for anterior restorations due to their high aesthetic properties. Microsc. Res. Tech. 75:758765, 2012. (C) 2011 Wiley Periodicals, Inc (AU)

• Processo FAPESP: 04/15816-7 - Estudos da dinâmica de fotopolimerização das resinas compostas
• Beneficiário: Alessandra Nara de Souza Rastelli
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado