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Effect of tooth brushing and thermal cycling on a surface change of ceromers finished with different methods
Author(s) -
CHO L.R.,
YI Y.J.,
HEO S.J.
Publication year - 2002
Publication title -
journal of oral rehabilitation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.991
H-Index - 93
eISSN - 1365-2842
pISSN - 0305-182X
DOI - 10.1046/j.1365-2842.2002.00877.x
Subject(s) - glaze , lustre (file system) , materials science , temperature cycling , surface roughness , tooth brushing , glazing , surface finish , dentistry , composite material , ceramic , medicine , thermal , computer science , toothbrush , physics , brush , file system , meteorology , operating system
Summary This in vitro study evaluated the effect of tooth brushing and thermal cycling on the surface lustre and surface roughness of three ceromer systems treated with different surface finishing methods. The ceromers studied were: (1) Artglass, (2) Targis, (3) Sculpture and (4) the control group, Z100. Half of the Targis and Sculpture groups were polished and the rest were coated with staining and glazing solution, respectively. All specimens were subjected to thermocycling 10 000 times. Tooth brushing abrasion tests were performed in a customized tooth‐brushing machine with 500 g weight applied on a back‐and‐forth cycle for 20 000 repetitions. The lustre determined by measuring the light reflection area and the average roughness was compared between groups and between pre‐ and post‐test values. All materials showed a lower lustre and rougher surface after thermocycling and tooth brushing ( P < 0·05 ). All ceromer specimens, except glazed Sculpture, showed a higher lustre and similar roughness to the control group. The post‐brushing results revealed that glazed Sculpture presented discretely fallen out glaze coatings and had maximum change. However, stained Targis showed minimum change ( P < 0·05 ) and polished Targis presented more changes than that of the staining treatment. It is therefore concluded that the glaze coatings for Sculpture don't exhibit long‐term durability, while stain coatings for Targis acted like a protective layer.