Effects of glazing methods on the optical and surface properties of silicate ceramics

Kurt, Meral; Güngör, Merve Bankoğlu; Nemli, Seçil Karakoca; Bal, Bilge Turhan

doi:10.1016/j.jpor.2019.07.005

Cited by 46 publications

(36 citation statements)

References 25 publications

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“…L* is a measure of the lightness-darkness of material (perfect black has an L* = 0, and perfect white has an L* = 100). a* coordinate represents the redness (positive value) or the greenness (negative value), while the b* coordinate is a measure of the yellowness (positive value) or the blueness (negative value) [ 16 , 36 , 37 ].…”

Section: Methodsmentioning

confidence: 99%

“…Optical properties of the glass-ceramics, such as translucency and opalescence, are critical factors for aesthetics and the natural appearance of the ceramic restorations. Several factors, such as the ceramic thickness, processing technique, composition, inner structure, crystalline content, grain size, pores, additives, and surface roughness, and topography, can influence the optical properties [16][17][18][19]. Surface finishing of ceramic materials is generally glazing, but mechanical polishing without a firing process can also be recommended for new types of micro-and nanostructured ceramics.…”

Section: Introductionmentioning

confidence: 99%

“…Surface finishing of ceramic materials is generally glazing, but mechanical polishing without a firing process can also be recommended for new types of micro-and nanostructured ceramics. After finishing, the surface becomes smoother, with benefits for the ceramic biocompatibility, decreasing the plaque accumulation and antagonist tooth wearing, and the susceptibility to staining, with a benefit for the natural-looking long-term aesthetics of the restoration [16,20,21].…”

Section: Introductionmentioning

confidence: 99%

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Surface Characterization and Optical Properties of Reinforced Dental Glass-Ceramics Related to Artificial Aging

et al. 2020

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The development of various dental glass-ceramic materials and the evolution of novel processing technologies lead to an essential change in the clinical and technical workflow. The long-term success of a dental restoration treatment is defined by its durability, which is directly influenced by the oral environment. This study’s purpose was to evaluate the artificial aging behavior of nanostructured, respective microstructured ceramics related to surface topography, roughness, and optical properties. Six monolithic restoration materials were selected: milled lithium disilicate glass-ceramic (LDS-M) MT (medium translucency), hot-pressed lithium disilicate glass-ceramic (LDS-P) MT and HT (high translucency), milled zirconia-reinforced lithium silicate ceramic (ZLS-M) MT and hot-pressed zirconia-reinforced lithium silicate ceramic (ZLS-P) MT and HT, resulting n = 96 surfaces. All the samples were artificially aged by thermal cycling, and all investigations were made before and after thermal cycling. In terms of optical properties, differences recorded between ZLS and LDS ceramics are not significant. Thermal cycling increases the translucency of ZLS and LDS glass-ceramic materials significantly, with the most harmful effect on the pressed and polished samples. Micro- and nano roughness are significantly influenced by in vitro aging and a negative correlation was recorded. Glazed samples are characterized by significant rougher surfaces for all types of materials. On nanolevel, ZLS materials are significantly smoothed by thermal cycling.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Surface Characterization and Optical Properties of Reinforced Dental Glass-Ceramics Related to Artificial Aging

et al. 2020

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“…The glaze layer presented a surface marked by bubbles and pathways of brush application, generating an irregular and nonuniform surface, as can be seen by SEM images. Regarding these findings, some authors have noted that polishing with abrasive rubbers and polishing pastes would be necessary to obtain a uniform surface on the glaze layer 5,18,19 . Besides that, the MZ glaze layer presented a higher surface roughness than the LD layer.…”

Section: Discussionmentioning

confidence: 99%

“…Regarding these findings, some authors have noted that polishing with abrasive rubbers and polishing pastes would be necessary to obtain a uniform surface on the glaze layer. 5,18,19 Besides that, the MZ glaze layer presented a higher surface roughness than the LD layer. A possible explanation might be that, due to the viscosity of the material, the glaze applied over MZ was not able to spread on the surface in such a homogeneous way and did not coat the surface uniformly.…”

Section: Biofilm Depositionmentioning

confidence: 97%

Effect of erosive and abrasive challenges on the glaze layer applied to ceramic materials

Willers

Silva

Siriani

et al. 2020

J Esthet Restor Dent

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Purpose: This study aims to evaluate the effect of erosive, abrasive, and erosive/ abrasive challenges on the glaze layer of ceramic materials. Methods: Ninety-five samples of monolithic zirconia (MZ) (LuxaCam Zircon HT-Plus) and lithium disilicate (LD) (IPS e.max CAD) were divided according to the response variables: Surface roughness and surface loss (n = 10), evaluated with optical profilometry; surface topography, with scanning electron microscopy SEM (n = 3); and biofilm deposition, with microbiological assay (n = 5). The evaluations were performed in three different time evaluations: (a) Sintered, (b) Glaze, and (c) Challenge (Erosion, Abrasion, and Erosion/Abrasion). Erosion consisted in immersing specimens in HCl solution, abrasion was performed with brushing machine, and erosion/abrasion consisted of a combination of the two previous protocols. Data were analyzed with parametric tests (P < 0.05). Results: MZ glaze layer presented significantly higher surface roughness (P = 0.00), surface loss (P = 0.03), and biofilm deposition (P = 0.00) than LD. Abrasion and erosion/abrasion showed similar outcomes, generating significantly higher surface roughness (P = 0.00), surface loss (P = 0.00), and biofilm deposition (P = 0.01) than erosion. Conclusions: Glaze layer properties were altered by the challenges, with abrasion and erosion/abrasion generating higher surface roughness, surface loss, and biofilm deposition than erosion. A significant correlation was found between the surface roughness and biofilm deposition. Clinical significance: The glaze layer is susceptible to challenges, especially to abrasion and erosion/abrasion, which generated greater surface roughness and surface loss than erosion. The greater surface roughness lead to a greater biofilm deposition on the glaze layer.

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Effects of Different Concentrations of Carbamide Peroxide on Color, Surface Roughness, and Hardness of CAD/CAM Dental Ceramics

Jamshidi,

Alaghemand,

Esmaeili

et al. 2024

Clinical & Exp Dental Res

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ObjectivesThis study assessed the effects of 15% and 20% carbamide peroxide (CP) on color, surface roughness, and hardness of computer‐aided design/computer‐aided manufacturing (CAD/CAM) dental ceramics.Materials and MethodsThis in vitro study was conducted on 120 Vita Mark II, Celtra Duo, and Suprinity CAD/CAM ceramic specimens. The ceramic specimens in each group (n = 40) were randomly assigned to two subgroups (n = 20) for polishing and glazing, and their baseline color, surface roughness (Ra), and hardness were assessed. In each subgroup, half of the specimens were exposed to 15% CP, while the other half were exposed to 20% CP. Their color change (ΔE), surface roughness, and hardness were then measured again. Surface roughness, hardness, and color were analyzed sequentially by profilometer, Vickers hardness tester, and spectrophotometer, respectively. Data were analyzed by repeated measures ANOVA, one‐way ANOVA, and post hoc Bonferroni test (α = 0.05).ResultsThe surface roughness of all groups significantly increased after bleaching treatment (p < 0.05). Surface hardness of all groups decreased after bleaching treatment, but this reduction was only significant in Vita Mark II subgroups (glazed, polished, 15%, and 20% CP). The ΔE was not clinically and visually perceivable in any group.ConclusionThe present results revealed that concentration of CP and type of surface treatment affected the surface properties of CAD/CAM ceramics. Type of surface treatment only affected the surface hardness of Vita Mark II ceramics (p < 0.05). Concentration of CP had a significant effect only on polished Vita Mark II.

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Effects of glazing methods on the optical and surface properties of silicate ceramics

Cited by 46 publications

References 25 publications

Surface Characterization and Optical Properties of Reinforced Dental Glass-Ceramics Related to Artificial Aging

Surface Characterization and Optical Properties of Reinforced Dental Glass-Ceramics Related to Artificial Aging

Effect of erosive and abrasive challenges on the glaze layer applied to ceramic materials

Effects of Different Concentrations of Carbamide Peroxide on Color, Surface Roughness, and Hardness of CAD/CAM Dental Ceramics

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