Effects of temperature change and beverage on mechanical and tribological properties of dental restorative composites

Fatigue behavior of resin-modified monolithic CAD–CAM RNC crowns and endocrowns

“…Though, in present study, fatigue conditions were exacerbated later and, moreover, a recent clinical trial on composite resin posterior crowns reported different kinds of complications long before 5 years of clinical use [24]. Cyclic loading and water aging are known to degrade the fracture resistance of Lava Ultimate restorations [25,26] while thermocycling has a negative influence on the final strength of a resin composite [27]. During the second phase, fatigue testing conditions were "accelerated" by increasing stepwise the load as well as the frequency of the cycles.…”

Influence of Storage Condition on Flexure Properties of Nano-Composite

“…However, in literatures, there are variable techniques of sample storage before mechanical testing. Composite test samples may be stored at room temperature, body temperature, or thermo-cycled to represent temperature variation in the oral cavity [7][8][9][10][11][12][13][14][15]17]. In addition, water was used as an aging solution in several studies to mimic the wet environment in the oral cavity [4,[18][19][20].…”

“…Some of these studies showed that water storage and thermo-cycling before testing may have a deleterious effect on mechanical behavior of resin materials [5,21,22], while others show either no influence of these variables [8] or even improved mechanical properties after thermo-cycling [9].…”

“…The improved physical and mechanical properties of RBC, the good esthetics, and the ease of chair side application in addition to acceptable durability of these restorations have led to its high popularity in recent decades. Durability of dental composite restorations is influenced by multiple factors, some are related to materials composition such as resin matrix, filler type and filler loading and others are related to the technique and surrounding environment in which the material is functioning, and recurrent decay could be an additional contributing factor to composite failure [1][2][3][4][5][6][7][8].…”

Effect of Dental Restorative Material Type and Shade on Characteristics of Two-Layer Dental Composite Systems

“…Hence the compliance of restorative layers which could be considered as the substrate in the layered restorative systems should be evaluated. Our previous study shows that the elasticity modulus of dental restorative nanohybrid composite is higher than the corresponding values for the nanocomposite and the conventional composite samples (Ayatollahi et al, 2015). Thus, the nanohybrid composite layer has less compliance compared to the other materials which increases the induced shrinkage stress in its layered specimens.…”