Influence of laboratory light sources on the wear characteristics of indirect composites

Abstract

The purpose of the current study was to evaluate the influence of light sources on the mechanical properties and wear characteristics of indirect composite materials. The two composite materials used were Estenia C&B and Epricord. The three laboratory polymerization units used, of which the wavelength range was 400-500 nm, were Hyper LII (two metal halide lamps of 4.82 mW/cm 2 ), -Light II (one halogen lamp and two fluorescent tubes of 3.60 mW/cm 2 ), and Labolight LV-II (three fluorescent tubes of 0.63 mW/ cm 2 ). Three-body wear test was performed using indirect composite plate specimens, a gold alloy antagonist, and a polymer slurry. Wear depths of Estenia C&B polymerized with Hyper LII, -Light II, and Labolight LV-II were 5.7, 18.5, and 64.2 µm respectively, whereas those of Epricord were 12.9, 18.7, and 48.5 µm respectively. Results showed that, after 100,000 cycles of localized loading, high-intensity light sources were effective in enhancing the wear resistance of both composite materials.

Surface roughness and gloss of current CAD/CAM resin composites before and after toothbrush abrasion

“…Resin composites consist of a polymeric matrix and reinforcing fillers, which could be ceramics, glass, glass ceramics, organic or composite 6) . The physical properties, color stability, and wear resistance of the resin composite are influenced by the extent to which it is polymerized [7][8][9][10][11] . In general, the wear resistance of the resin composite may be improved by enhancement of polymerization 8,9) .…”

Influence of different composite materials and cavity preparation designs on the fracture resistance of mesio-occluso-distal inlay restoration

“…Hybrid ceramics in Estenia are also advanced composite materials with high reinforcement resistance, which is the result of the loading of a resin matrix containing a micro-filler with a high proportion of nano-filler particles. Hirata et al 43) reported that the wear of Estenia was smaller than that of Epricord. In this study, the resin Epricord displayed significantly lower fracture strength than Estenia.…”

Influence of ceramic surface texture on the wear of gold alloy and heat-pressed ceramics

“…However, there are few studies that have used dental alloys and dental ceramics as rod specimens. It is possible to easily manufacture a precise rounded rod specimen composed of dental alloys or heat-pressed ceramics using the conventional lost-wax technique 5,18,19) . The purpose of this study was to evaluate the influence of ceramic surface texture on the wear of opposing gold alloy and heat-pressed ceramics.…”