Evaluation of Linear Polymerization Shrinkage, Flexural Strength and Modulus of Elasticity of Dental Composites

被引：21

作者：

de Melo Monteiro, Gabriela Queiroz ^{[1
]}

Japiassa Resende Montes, Marcos Antonio ^{[2
]}

机构：

[1] Ctr Univ Joao Pessoa UNIPE, Curso Odontol, Joao Pessoa, Paraiba, Brazil

[2] Univ Pernambuco FOP UPE, Fac Odontol, Dept Odontol Restauradora, Camaragibe, PE, Brazil

来源：

MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS | 2010年 / 13卷 / 01期

关键词：

composite resin; modulus of elasticity; polymerization shrinkage; flexural strength; STRESS;

D O I：

10.1590/S1516-14392010000100012

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Linear polymerization shrinkage (LPS), flexural strength (FS) and modulus of elasticity (ME) of 7 dental composites (Filtek Z350 (TM), Filtek Z250 (TM)/3M ESPE; Grandio (TM), Polofil Supra (TM)/VOCO; TPH Spectrum (TM), TPH3 (TM), Esthet-X (TM)/Denstply) were measured. For the measurement of LPS, composites were applied to a cylindrical metallic mold and polymerized (n = 8). The gap formed at the resin/mold interface was observed using scanning electron microscopy (1500x). For FS and ME, specimens were prepared according to the ISO 4049 specifications (n = 10). Statistical analysis of the data was performed with one-way ANOVA and the Tukey test. TPH Spectrum presented significantly higher LPS values (29.45 mu m). Grandio had significantly higher mean values for FS (141.07 MPa) and ME (13.91 GPa). The relationship between modulus of elasticity and polymerization shrinkage is the main challenge for maintenance of the adhesive interface, thus composites presenting high shrinkage values, associated with a high modulus of elasticity tend to disrupt the adhesive interface under polymerization.

引用

页码：51 / 55

页数：5

共 27 条

[11] Network structure of bis-GMA- and UDMA-based resin systems [J].

Floyd, Cynthia J. E. ;

Dickens, Sabine H. .

DENTAL MATERIALS, 2006, 22 (12) :1143-1149

[12] Dynamic and static elastic moduli of packable and flowable composite resins and their development after initial photo curing [J].

Helvatjoglu-Antoniades, M ;

Papadogiannis, Y ;

Lakes, RS ;

Dionysopoulos, P ;

Papadogiannis, D .

DENTAL MATERIALS, 2006, 22 (05) :450-459

[13] Macro-, micro- and nano-mechanical investigations on silorane and methacrylate-based composites [J].

Ilie, Nicoleta ;

Hickel, Reinhard .

DENTAL MATERIALS, 2009, 25 (06) :810-819

[14]

KAUF M, 1994, LASER MAGAZIN, V5, P12

[15] Polymerization shrinkage and contraction stress of dental resin composites [J].

Kleverlaan, CJ ;

Feilzer, AJ .

DENTAL MATERIALS, 2005, 21 (12) :1150-1157

[16] Dynamic visco-elastic properties of dental composite resins [J].

Mesquita, RV ;

Axmann, D ;

Geis-Gerstorfer, A .

DENTAL MATERIALS, 2006, 22 (03) :258-267

[17] An application of nanotechnology in advanced dental materials [J].

Mitra, SB ;

Wu, D ;

Holmes, BN .

JOURNAL OF THE AMERICAN DENTAL ASSOCIATION, 2003, 134 (10) :1382-1390

[18]

Obici AC, 2002, OPER DENT, V27, P192

[19] Measuring the residual stress in dental composites using a ring slitting method [J].

Park, JW ;

Ferracane, JL .

DENTAL MATERIALS, 2005, 21 (09) :882-889

[20] Comparative analysis of the shrinkage stress of composite resins [J].

Pereira, Rosana Aparecida ;

de Araujo, Paulo Amarante ;

Castaneda-Espinosa, Juan Carlos ;

Lia Mondelli, Rafael Francisco .

JOURNAL OF APPLIED ORAL SCIENCE, 2008, 16 (01) :30-34

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