Evaluation of the Mechanical Properties of Three Resin-Modified Glass-Ionomer Materials

Abstract

This study is aimed at evaluating the flexural strength (FS), fracture toughness (FT), and diametral tensile strength (DTS) of three resin-modified glass-ionomer cements (RMGICs): Ketac Nano, Riva Light Cure, and Fuji II LC. One hundred twenty specimens were prepared from the RMGIC materials ( n = 10 ). The cements were mixed and inserted into different mould sizes according to the test performed: FS: rectangular Teflon mould ( 32 mm × 3.15 mm × 2 mm ); FT: notchless triangular prism (NTP) Teflon mould ( 6 mm × 6 mm × 6 mm × 12 mm ); and DTS: ring road stainless steel mould ( 6 mm × 3 mm ). Specimens were light cured for 20 seconds on each surface and stored in distilled water at 37 ° C ± 2 ° C for seven days prior to tests. To evaluate the influence of storage in the mechanical properties of the RMGIs, specimens tested for DTS were stored in distilled water at 37 ° C ± 2 ° C for 32 days prior to test. Data were analyzed by ANOVA and Tukey’s test ( α = 0.05 ). Fuji II LC presented significantly higher values for all tests employed when compared to Ketac Nano and Riva LC RMGIs. There was no significant difference on DTS before and after the 32-day storage for each material. Fuji II LC presented superior mechanical properties when compared to Ketac Nano, and Riva LC storage showed no influence on the mechanical properties of the RMGI materials tested.

Retrospective Clinical Evaluation of RMGIC/GIC Class V Restorations

“…Therefore, the bonding mechanisms of RMGI to the tooth tissue are twofold: micromechanical interlocking and chemical interaction between the carboxyl groups of the ionomer materials and the calcium of the dental structure [ 23 ]. Moreover, the superior clinical performance of RMGICs has been ascribed to the improved mechanical properties of RMGIC compared to GIC [ 4 , 21 , 24 , 25 , 26 ].…”

Tratamento restaurador atraumático em dentes permanentes: uma revisão integrativa da literatura

“…As principais causas do fracasso incluem: defeitos marginais, perda do material e textura superficial insatisfatória, sua principal desvantagem é a baixa resistência ao desgaste em locais sujeitos a altas forças oclusais e falta de tenacidade à fratura suficiente. Para atualizar estas informações, Rêgo; relata que comparado aos CIVs convencionais, o modificado por resina exibe maior dureza, tenacidade à fratura, resistência à flexão, resistência à tração dimensional e resistência ao desgaste. A presença de componentes de resina contribui para as propriedades mecânicas superiores, menor tempo de presa, menor sensibilidade à umidade precoce, maior tempo de trabalho, maior translucidez e resultados estéticos superiores.…”

Comparative investigation of fabrication, roughness, mechanical and wear properties of glass ionomer and nanofillers reinforced dental composite: A review

“…The amount of polymerization initiator must be optimized to get the maximum of degree of conversion of the leached amount [54].…”

“…% of nanosilica particle, Figure 3 [52]. Some of important findings of investigations shows the comparative analysis of both the nanoparticles and glass ionomer cement on mechanical properties of dental composite, Table 1 [53][54][55][56].…”