Nanoparticle Loading Level and Properties of Experimental Hybrid Resin Luting Agents

Abstract

Modest incorporation of nanoparticles may improve the properties of resin luting materials. Nanofiller mass fractions above 2.5% should, however, be avoided because they may be detrimental to the properties of the resin luting agents.

Influence of glass particle size of resin cements on bonding to glass ceramic: SEM and bond strength evaluation

“…Filler particles of various sizes and types are used in commercial formulations. For instance, the use of nanoparticles in resin cements has been recently investigated (Habekost et al, ), but the influence of the particles on the bonding mechanism of glass‐ceramics is unknown. Different filler systems could influence the viscosity and flowability of the resin cement, potentially interfering with their penetration into the microporosity created on the ceramic by HFA or AA.…”

Nanotechnology in Endodontics

“…Furthermore, poor connective forces within the clusters allow them to act as spots of stress concentration. If strong particle-to-particle connective forces could be provided, those agglomerates might have a protective effect on the material, which is not yet observed [ 162 ].…”

“…The incorporation of nanoparticles in dental cements is somewhat desirable since it may improve the mechanical properties of the luting systems without increasing the fi lm thickness of the material. However, the incorporation of 2.5 % silica nanoparticles (~7 nm) compromises the fl exural strength and fi lm thickness [ 162 ]. This effect is probably due to the particle entanglement and agglomeration.…”

“…This effect is probably due to the particle entanglement and agglomeration. Considering that spherical particles would have only one point of contact between one another, researchers expect the tendency to agglomerate to be reduced since less energy would be needed to break those interparticle interactions [ 162 ]. Furthermore, poor connective forces within the clusters allow them to act as spots of stress concentration.…”

“…The development of an experimental resinbased cement with silica particles (~7 nm) indicated that the incorporation of up to 2.5 % is benefi cial to the mechanical properties. Beyond that, mechanical properties are compromised by particle entanglement and agglomeration, acting as spots of localized stress concentration [ 162 ].…”