Relationship between filler content and selected mechanical properties of six microhybrid composites

Mota, Eduardo Gonçalves; Weiss, Adriano; Spohr, Ana Maria; Oshima, Hugo Mitsuo Silva; Carvalho, Lígia Maria Nogarett de

doi:10.1590/s1980-65232011000200010

Cited by 16 publications

(15 citation statements)

References 23 publications

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“…They also reported that the composites with irregular fillers showed intermediate hardness. Similar result was obtained by Mota et al who reported that rounded filler resulted into higher hardness. The increase in hardness with increase in filler content is in agreement with Alsarif et al and Masouras et al .…”

Section: Resultssupporting

confidence: 90%

Novel dental composite material reinforced with silane functionalized microsized gypsum filler particles

2015

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Gypsum has been recognized as acceptable for human consumption as a dietary source of calcium. During contact with teeth, it releases Ca2+ ions needed for remineralization of tooth tissue, and therefore based on the concept of remineralization, gypsum may be a strategic additive for dental restorative materials. Hence, the objective of this study was to develop and characterize a novel dental material reinforced with different weight fraction of micro sized gypsum filler particle. A novel composite material was fabricated using conventional resin matrix consisting of Bisphenol‐A glycidyl methacrylate (Bis‐GMA), tri‐ethylene glycol dimethacrylate (TEGDMA), camphorquinone (CQ) and ethyl 4 dimethyl amino benzoate (EDMAB). Four different compositions were prepared by reinforcing different weight percentage (0–3 wt%) of silane functionalized micro sized gypsum particle. Fourier Transformed Infrared spectroscopy (FT‐IR), Transmission Electron Microscope (TEM) and Thermogravimetric Analysis (TGA) of silane treated filler were used to study the coupling phenomena between filler and resin. Polymerization shrinkage of composites was evaluated using specific gravity method. The Dynamic Mechanical Analysis (DMA) result revealed that the Glass transition temperature was found to be decreased by 15°C compared to unfilled composite. It was also found that the 2 wt% gypsum content recorded the highest value of storage modulus. Simultaneous Thermal Analysis (STA) result revealed that 2 wt% gypsum filled dental composite exhibited maximum thermal stability. The novel dental material exhibited better physical, optical, mechanical, thermal properties and lowest polymerization shrinkage with maximum conversion. POLYM. COMPOS., 38:404–415, 2017. © 2015 Society of Plastics Engineers

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Section: Resultssupporting

confidence: 90%

Novel dental composite material reinforced with silane functionalized microsized gypsum filler particles

2015

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“…Also, the addition of this material reduces the viscosity, enabling a higher filling content. In the end, a harder matrix is obtained [52]. In addition, the filler particles of Filtek Ultimate contain zirconia.…”

Section: Discussionmentioning

confidence: 99%

The Effect of the Light Intensity and Light Distances of LED and QTH Curing Devices on the Hardness of Two Light-Cured Nano-Resin Composites

Segal¹,

Lugassy²,

Mijiritsky³

et al. 2015

MSA

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Background: Effective polymerization of the composite resin is essential to obtain long term clinical success and has a great importance obtaining improved mechanical properties. The purpose of this study was to measure the effect of the light intensity of LED and QTH curing devices in relation to the light distances, on the hardness (KHN) of two light cure nano-resin composite. Material and Methods: The top and bottom surfaces of the two nanofill composite specimens were evaluated. Two LED and two QTH light curing devices were used at nine different distances. Light intensity was measured with two radiometers placed at these same distances from the curing tip. 360 pvc dies were prepared with circular cavity 3 mm in diameter and 2 mm thick. The tested materials were placed in each cavity. The different light curing distances were standardized by adding pvc spacers dies at different height matching the different distances. Top and bottom surface microhardness were evaluated with a Micro Hardness Tester in knoop hardness numbers (Kg/mm 2). Data were statistically analyzed using: Three-way ANOVA, Tukey and Pearsons test. Results: It was revealed that there was a statistically significant difference in microhardness between the composites (p < 0.001), between the nine distances (p < 0.001) and between the four light curing devices (p < 0.001). Increasing the distance of the light source from composite resin, the light intensity and the microhardness values at the top and bottom surface decrease. LED light curing devices produced a greater microhardness results at the bottom surface of the specimens. The Filtek Ultimate nanocomposite (3 m) showed highest microhardness values on the top and bottom surfaces, polymerized with all four curing devices and all nine distances compared to Empress Direct nano composite (Ivoclar vivadent). Clinical significant: Even with high power LED curing light, the distance between the tip of the light source and the restoration surface should be as close as possible. In this study, Filtek Ultimate showed better results (highest microhardness values) than Empress P. Segal et al.

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“…Mota et al 9 pontuam que ao se realizar estudos com compósitos de mesma classificação, almeja-se que eles manifestem comportamentos mecânicos similares, corroborando com que ocorre no presente exposto; visto que não houve diferenças significativas entre as resinas compostas testadas.…”

Section: Discussionunclassified

“…Os valores de resistência à compressão, obtidos no presente trabalho variados entre 7,36 Mpa para a resina Zirconfill (nano-híbrida) e 5,58 Mpa para a Z350 (nanoparticulada) não corroboraram com os valores de Souza e colaboradores 11 que realizaram teste de resistência à compressão na resina composta nanoparticulada Filtek Supreme XT e pontuou o valor médio desta em 248,2 Mpa. Mota et al 9 encontraram valor de 184,67 Mpa para essa mesma resina composta, afastando-se dos resultados desse trabalho para a resina nanoparticulada.…”

Section: Discussionunclassified

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Avaliação in vitro da resistência de duas resinas compostas submetidas a teste de compressão

Almeida¹,

Guênes²,

Medeiros³

et al. 2020

Arch Health Invest

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Introdução: O aumento da demanda pela odontologia estética guiou o desenvolvimento de resinas compostas com melhores propriedades físicas e mecânicas. Por isso, percebe-se que há atualmente disponibilidade de uma grande variedade desse material. Dessa forma faz-se necessário a realização de estudos científicos acerca das resinas composta. Objetivo: Avaliar comparativamente, in vitro, à resistência de duas resinas compostas fotopolimerizáveis encontrados no mercado: a Filtek Z350 XT da 3M e a Zirconfill da Technw, após teste mecânico de compressão e análise estatística dos resultados. Material e método: Quatro amostras de cada resina composta foram submetidas ao teste de resistência à compressão numa máquina de ensaio universal. Os resultados foram analisados estatisticamente através do teste de Mann-Whitney com margem de erro 5.0%. Para digitar os dados e obter os cálculos estatísticos foi utilizado o programa IBM SPSS na versão 23. Resultados: A média da força foi mais elevada na resina Zirconfill do que na resina Z350; entretanto, a mediana foi mais elevada na resina Z350. Para a margem de erro fixada (5,0%) não há comprovação de diferença significativa (p > 0,05) entre as duas resinas em relação à força de resistência analisada. Conclusão: As resinas compostas testadas mostram valores de resistência a compressão semelhantes e não apresentam diferenças relevantes.Descritores: Resinas Compostas; Nanotecnologia; Odontologia.ReferênciasBowen RL. Use of epoxy resins in restorative materials. J Dent Res. 1956;35(3):360-69.Chagas LS. Avaliação da resistência flexural e módulo de elasticidade de uma resina do tipo Bulk Fill em comparação com uma resina convencional [monografia de conclusão de curso]. Santa Cruz do Sul: Universidade de Santa Cruz do Sul - UNISC; 2016.Behr M, Proff P, Kollbeck C, Langriegr S, Kunze J, Handel G et al. The bond strength of the resin-to-zirconia interface using diferente bonding concepts. J Mech Behav Biomed Mater. 2011;4(1):2-8.Rodrigues DS. Análise da porosidade, resistência mecânica e desgaste de cimentos de ionômero de vidro e resina composta [dissertação]. Porto: Faculdade de Ciências da Saúde, Universidade Fernando Pessoa; 2014.Pereira AFV, Miranda Junior WG. Avaliação in vitro da microinfiltração e adaptação marginal em restaurações classe v simulando lesões de abfração: estudo piloto. Arq Cent Estud Curso Odontol Univ Fed Minas Gerais. 2008;44(2):18-25.Ferracane JL. Resin composite – state of the art. Dent Mater. 2011; 27(1):29-38.Han JM, Lin H, Zheng G, Shinya A, Gomi H, Shinya A et al. Effect of nanofiller on wear resistance and surface roughness of resin composites. Chin J Dent Res. 2012;15(1):41-7.Mitra SB, Wu D, Holmes B. An application of nanotechnology in advanced dental materials. J Am Dent Assoc. 2003;134(10):1382-90.Mota EG, Weiss A, Spohr AM, Oshima HMS, Carvalho LMN. Relationship between filler content and selected mechanical properties of six microhybrid composites. Rev odonto cienc. 2011;26(2):151-55.Rosa RS. Propriedades mecânicas de resinas compostas com nanopartículas [tese]. Porto Alegre: Pontifícia Universidade Católica do Rio Grande do Sul, Faculdade de Odontologia; 2010.Souza ALT, Oliveira FMMPC, Moysés MR, Assis CPD, Ribeiro JCR, Dias SC. Avaliação da resistência à compressão de resinas compostas fotopolimerizáveis. Arq Odontol. 2007;43(1):30-5.

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Relationship between filler content and selected mechanical properties of six microhybrid composites

Cited by 16 publications

References 23 publications

Novel dental composite material reinforced with silane functionalized microsized gypsum filler particles

Novel dental composite material reinforced with silane functionalized microsized gypsum filler particles

The Effect of the Light Intensity and Light Distances of LED and QTH Curing Devices on the Hardness of Two Light-Cured Nano-Resin Composites

Avaliação in vitro da resistência de duas resinas compostas submetidas a teste de compressão

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