Effect of tooth brush abrasion on the color, gloss and surface roughness of internally and externally stained monolithic ceramic materials

Abstract

Purpose: To measure the durability of the color, change in surface roughness and gloss of stained monolithic ceramic materials subjected to artificial tooth brush abrasion. Materials and methods: Standardized specimens were manufactured from pressable lithium-disilicate glass ceramic (PC; IPS e.max Press), machinable lithium-disilicate glass ceramic (MC; IPS e.max CAD), and zirconia (ZR; Zenostar). Ceramic staining was applied before (internal; in) and after crystallization/ sintering (external; ex). Of each ceramic material, specimens without staining were prepared (no staining; no). Porcelain-fused-to-metal specimens served as control (PFM). Each group consisted of 15 specimens. Tooth brushing was simulated with tooth brushing strokes of 21.6 k, 43.2 k, and 64.8 k. Color, gloss and roughness were measured at baseline and after cycle intervals. Kruskal-Wallis and paired Post-hoc Conover tests were applied to detect statistical differences between treatment groups. Differences before and after aging were calculated by Wilcoxon signed rank test (α=0.05).

Effectiveness and safety of bleaching agents on lithium disilicate glass ceramics

“…In the literature, surface roughness values are between 0.55 and 1.68 µm for IP 31 - 33 and 0.2 and 4.75 µm for IC. 34 - 38 In the current study, mean surface roughness values were 2.16 ± 1.15 µm for IP specimens and 2.52 ± 1.25 µm for IC specimens. Demir et al 34 reported that home bleaching applied with 16% carbamide peroxide for seven days increased the surface roughness of IPS e. max CAD specimens.…”

The Toothbrushing Effects on Surface Properties and Color Stability of CAD/CAM and Pressable Ceramic Fixed Restorations—An In Vitro Study

“…Moreover, Goudas et al examined the surface roughness of pressable dental ceramics after different aging conditions and reported that lower surface roughness values were observed [38]. On the contrary, previous studies showed that toothbrushing significantly increases surface roughness [13,39].…”

“…Toothbrushing, as an example of surface wear, is another main factor that might influence the surface properties of ceramic materials. Many studies [12][13][14][15] have reported that toothbrushing can adversely affect feldspathic porcelain restorations [12]. A previous study reported that extrinsically stained feldspathic porcelain restorations showed significant alteration in surface roughness and color after 8.5 years of simulated toothbrushing [13].…”

“…Many studies [12][13][14][15] have reported that toothbrushing can adversely affect feldspathic porcelain restorations [12]. A previous study reported that extrinsically stained feldspathic porcelain restorations showed significant alteration in surface roughness and color after 8.5 years of simulated toothbrushing [13]. Dal Piva et al reported that using a toothbrush could remove extrinsic stains applied onto the surface of pressable ceramics after 10 to 12 years of toothbrushing unless the stain is covered by a protective layer of glaze [14].…”