Surface textures of composite resins after combined wear test simulating both occlusal wear and brushing wear

Abstract

The purpose of this study was to investigate the relation between the texture of worn surfaces of composite resins and the maximum wear depth. Three types of composite resins were investigated: a hybrid composite resin consisting of irregular-shaped inorganic filler particles (APX); a composite resin which contained small, irregular-shaped, inorganic filler particles and large organic composite filler particles (SRE); and another which contained spherical inorganic filler particles and large organic composite filler (SDX). Surface profile measurement and elemental analysis were carried out on the worn surfaces of these three composite resins using an electron probe microanalyzer (EPMA). For the composite resin which exhibited the largest maximum wear depth, its surface texture was slightly rough with fine pores and grooves. For the composite resin with lowest maximum wear depth, it had a smooth worn surface due to the large organic composite filler being abraded during the combined wear test.

Physicomechanical properties of a zinc-reinforced glass ionomer restorative material

“…The surfaces of carefully polished dental restorations can be compromised by subsequent home care, including toothbrushing. Most studies of the effects of toothbrushing and polishing on dental restorations concluded that restoration surfaces are smoother before polishing or toothbrushing and tend to increase in roughness afterward (10,15,25,26).…”

Surface roughness and filler particles characterization of resin‐based composites

“…The maintenance of a low surface roughness is an important factor related to surface gloss retention when composites are submitted to toothbrushing (O'Neill et al, ; Shimokawa et al, ). Therefore, surface roughness can influence staining, discoloration, and overall esthetics (Furuse, Gordon, Rodrigues, Silikas, & Watts, ), as well as biofilm accumulation (Cazzaniga, Ottobelli, Ionescu, Garcia‐Godoy, & Brambilla, ; Sturz, Faber, Scheer, Rothamel, & Neugebauer, ), and surface wear (Kakuta, Wonglamsam, Goto, & Ogura, ) of composite fillings.…”

<i>In vitro</i> wear of flowable resin composite for posterior restorations

“…5, the amount of large fillers containing MLV seems to be more than other materials, and cracks were observed around fillers after 40,000 cycles. These protruded large fillers might have experienced greater friction with medium or the stylus tip during each wear testing, which led to accelerative wear, as shown in previous studies 6,12,16,17,19,20) . Although the two-body wear test in the current study was carried out without medium, the exfoliated fillers may have acted as an abrasive medium.…”