Influence of thermal cycles in water on flexural strength of laboratory‐processed composite resin

Abstract

Recently a new generation of laboratory-processed composite resins containing submicron glass fillers was introduced, with claims of high strength. The purpose of this study was to evaluate the effect of thermal cycling in water on the flexural strength and hardness of several laboratory composite systems. The flexural strength of the new laboratory processed composite resins (Artglass [AG], Targis [TR] and Estenia [ES]) was significantly higher than that of conventional resins (Dentacolor [DC] and Cesead II [CS]). Thermocycling caused a reduction of the flexural strength but not a reduction of the hardness for most of materials tested. It was concluded that thermocycling affected the properties of the laboratory-processed hybrid type composite resin, ES, AG and TR. However, the changes of these properties were smaller than those of microfine type composite resin DC. Thus, ES, AG and TR may maintain better properties during service compared with DC.

Diametral Tensile Strength, Flexural Strength, and Surface Microhardness of Bioactive Bulk Fill Restorative

“…A power analysis at 80% power was performed to identify samples size (five samples) from means and standard deviations (SDs) from previous studies. 16 The present study compared the mechanical properties of RBCs, GICs, and bioactive RMGIC, as these are commonly used Same superscript lowercase letters demonstrate no significant differences between materials (columns), while *denotes a significant difference and **denote a highly significant difference between tested groups (rows)…”

“…Therefore, the surface characteristics of restorative materials may affect the FS. 16 For screening of resin-based materials, FS is one of the key mechanical properties selected by the International Organization for Standardization (ISO). 18 The ISO has set 80 MPa as the minimum FS (benchmark) for polymerbased filling and restorative materials as suitable and acceptable for restorations involving outer occlusal surfaces.…”

Fabrication of a maxillary posterior fixed partial denture with a type 4 gold alloy and a dual-polymerizing indirect composite

“…Laboratory evaluation subsequently demonstrated the improved characteristics of the indirect composite material (1)(2)(3)(4). Although the manufacturer recommends the use of the Estenia and Estenia C&B (Kuraray Medical Inc., Tokyo, Japan) materials primarily for metal-free restorations (4-6), clinicians and dental laboratory technicians need to acquire a standardized veneering technique for the casting alloy in combination with the currently available composite material and bonding system.…”

Finite Element Analysis of Fiber-reinforced Fixed Partial Dentures

“…In particular, it has been favorably reported that FPDs with FRC framework exhibited high strength12,13) However, particulate filler composites which are to be veneered on the framework have a far lower strength than the FRC framework itself14) , although they are superior to conventional composites in physical properties15, 16) It has been said that the strength of FRC and veneering composite laminates can be increased by placing the FRC layer at the bottom of the appliance which is to be subjected to tensile stress17) . The same may also be true of FPDs using FRC.…”