Evaluation of diametral tensile strength and Knoop microhardness of five nanofilled composites in dentin and enamel shades.
The purpose of this study was to evaluate and compare the mechanical behavior of five nanofilled composites with dentin and enamel shades trough diametral tensile strength and knoop microhardness. 4 Seasons (Ivoclar Vivadent), Esthet X improved (Dentsply), Filtek Supreme (3M), Grandio (Voco) and Palfique Estelite (Tokuyama Dental Corp.) were used in this research. Twenty samples (6 mm diameter and 3 mm thickness) of each material were used. Ten samples were submitted to knoop microhardness and the others to diametral tensile strength examinations. The results were submitted to ANOVA and Tukey statistical tests (a=0.05). There were significant differences between the tested groups (p<0.05). The diametral tensile strength ranged from 36.08 (4 Seansons dentin) to 49.24 (Grandio enamel). The knoop microhardness ranged from 54.45 (Esthet X improved enamel) to 123.90 (Grandio dentin). A great variability in the mechanical behavior of the nanofilled composites was observed. However it was not recorded with dentin and enamel shades with the exception of Grandio.
Mota
Eduardo Gonçalves
EG
Pontifical Catholic University of Rio Grande do Sul, Brazil. eduardo.mota@pucrs.br
Oshima
Hugo Mitsuo Silva
HM
Burnett
Luiz Henrique
LH
Pires
Luiz Antonio Gaieski
LA
Rosa
Rogério Simões
RS
D003116:Color; D003188:Composite Resins / Q000737:chemistry*; D003743:Dental Enamel; D003764:Dental Materials / Q000737:chemistry*; D003804:Dentin; D006244:Hardness; D006801:Humans; D008422:Materials Testing; D053758:Nanoparticles / Q000737:chemistry*; D013314:Stress, Mechanical; D013499:Surface Properties; D013718:Tensile Strength
D003188:Composite Resins; D003764:Dental Materials; C466112:Esthet-X; C474035:Filtek Supreme; C509998:Grandio; C111840:flowable hybrid composite; C086113:palfique estelite