Microtensile bond strength and micromorphologic analysis of surface-treated resin nanoceramics

Abstract

PURPOSEThe aim of this study was to evaluate the influence of different surface treatment methods on the microtensile bond strength of resin cement to resin nanoceramic (RNC).MATERIALS AND METHODSRNC onlays (Lava Ultimate) (n=30) were treated using air abrasion with and without a universal adhesive, or HF etching followed by a universal adhesive with and without a silane coupling agent, or tribological silica coating with and without a universal adhesive, and divided into 6 groups. Onlays were luted with resin cement to dentin surfaces. A microtensile bond strength test was performed and evaluated by one-way ANOVA and Tukey HSD test (α=.05). A nanoscratch test, field emission scanning electron microscopy, and energy dispersive X-ray spectroscopy were used for micromorphologic analysis (α=.05). The roughness and elemental proportion were evaluated by Kruskal–Wallis test and Mann–Whitney U test.RESULTSTribological silica coating showed the highest roughness, followed by air abrasion and HF etching. After HF etching, the RNC surface presented a decrease in oxygen, silicon, and zirconium ratio with increasing carbon ratio. Air abrasion with universal adhesive showed the highest bond strength followed by tribological silica coating with universal adhesive. HF etching with universal adhesive showed the lowest bond strength.CONCLUSIONAn improved understanding of the effect of surface treatment of RNC could enhance the durability of resin bonding when used for indirect restorations. When using RNC for restoration, effective and systemic surface roughening methods and an appropriate adhesive are required.

Surface characteristics and optical properties of plasma deposited films on indirect aesthetic restorative dental materials

“…There are other studies that bring the chemical proportions of the porcelain with and without the presence of C, [62] as done in this study, or even report the obtained values and do not go in further details on the presence of this element [63]. Feldspathic VM9 porcelain, Enamic and Lava Ultimate chemical composition, obtained from XPS analyses, were consistent to previous studies [59,62,64,65] and showed agreement with the atomic proportions obtained in previous works [66][67][68][69].…”

Bonding Strength of Universal Adhesives to Indirect Substrates: A Meta‐Analysis of in Vitro Studies

“…Seven different indirect substrates were considered in this review. These included lithium disilicate ceramic, 20,22,23,25,28‐39 yttrium‐stabilized zirconium dioxide ceramic, 20 ‐22, 24,27,32,37,40‐53 leucite‐reinforced ceramic, 20,54‐56 feldspathic porcelain, 32,59 polymer infiltrated ceramic material, 19,58 resin composite, 20,26,29,57,59‐66 and metal alloys 67–69 . The characteristics of these studies are summarized in Table 2.…”

Effect of alumina-blasting pressure on adhesion of CAD/CAM resin block to dentin

“…The bond strength between CRBs and resin cement is improved by surface treatments such as mechanical treatment and the application of adhesive material. Strong bonding between CRBs and resin cement depends on micromechanical interlocking and chemical bonding to the surface of the restorative material, which in turn requires cleaning and roughening for adequate surface activation 15) . However, previous studies indicate that alumina-blast flaws are similar in nature to true microcracks 12,[16][17][18][19] .…”