The effect of repeated firings on the color of an alumina ceramic system with two different veneering porcelain shades

Şahin, Volkan; Uludağ, Bülent; Üşümez, Aslıhan; Özkır, Serhat Emre

doi:10.1016/s0022-3913(10)60169-2

Cited by 21 publications

(31 citation statements)

References 38 publications

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“…The TP values may be affected by the structure of the veneering ceramic varying in crystalline contents, increased specimen thickness, reflectance at the interface between core and veneering ceramic, porosity between the layers, and any changes in the constituent core material with additional firing cycles. 32 Although the TP value change was not expected after different surface finishing methods in ALV specimens, and the results were in contrast to some studies, 25 The surface finishing protocols applied for the Si 2 O-Li 2 O ceramic systems and the parameters (Ra, ∆E, TP) evaluated in this study showed statistically significant differences.…”

Section: Discussioncontrasting

confidence: 97%

“…22,25,26,28,30 ∆E> 3.5 has been accepted as a clinically unacceptable color difference. 28,35,36 The aim of this study was not to achieve the shade match but to evaluate the ∆E values in comparison with the corresponding VITA shade tab (A2) considering the limitations of the specimen preparation protocols used in this study.…”

Section: Discussionmentioning

confidence: 99%

“…16,19 Ceramic translucency and color can be affected by many properties, including ceramic thickness, crystalline structure, number of ceramic firings, veneering technique, repeated ceramic staining cycles, grain size, pigments, number, size and distribution of defects, and porosity. [20][21][22][23][24][25][26] The wide-spread clinical use of metal-ceramic restorations is mainly due to its highly predictable strength and reasonable esthetics. The drawback of such restorations is increased light reflectivity due to opaque porcelain layer.…”

Section: Introductionmentioning

confidence: 99%

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Effects of surface-finishing protocols on the roughness, color change, and translucency of different ceramic systems

Akar

Pekkan

Çal

et al. 2014

The Journal of Prosthetic Dentistry

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STATEMENT OF PROBLEM Surface-finishing protocols have a mechanical impact on ceramic surfaces that could eventually affect surface topography and light scattering. An optimum protocol is needed to avoid damaging the optical properties of ceramics. PURPOSE The purpose of this study was to determine the effects of different surface-finishing protocols on the surface roughness, color change, and translucency of ceramic and metal ceramic restorations. MATERIAL AND METHODS Standardized disk-shaped specimens (1.5 × 10 mm, n=128) were fabricated from 3 different ceramic core materials (aluminum oxide [Al2O3]-AL, zirconium oxide [ZrO2]-ZR, lithium disilicate [Li2Si2O5]-LIT), veneered (V) with dentin ceramics (n=32 per group), and placed in the following groups: ALV, ZRV, and LITV. The metal ceramic group acted as the control (n=32). Four different surface-finishing methods were tested. Airborne-particle abrasion with 50 m Al2O3, polishing with adjustment kit, polishing with adjustment kit plus diamond polishing paste, and autoglazing (n=8 subgroup) were applied on the veneering ceramics. The specimens were analyzed with a profilometer for surface roughness, and color change and translucency were measured with a clinical spectrophotometer. Statistical analyses were performed with 1-way ANOVA and the Tukey honest significant difference tests (=.05). RESULTS Specimens treated with the airborne particle abrasion method showed significantly higher mean profilometer for surface roughness values in all groups (P<.05). The polishing with adjustment kit and autoglazing methods revealed statistically similar surface roughness values in all groups (P>.05). With the diamond polishing paste method, lower surface roughness values were achieved in the ZRV and metal ceramic groups acted as the control groups. Different surface-finishing methods affected the color change of the ceramic systems, except for ZRV. Surface-finishing protocols significantly affected the translucency values of the ALV, LITV, and metal ceramic groups (P<.05). CONCLUSIONS No single surface-finishing protocol can be recommended to obtain the smoothest surface and the least color change without affecting translucency for the ceramics tested. The airborne-particle abrasion protocol created rougher surfaces and decreased translucency, and color change in zirconia was not affected by the finishing protocols. Purpose. The purpose of this study was to determine the effects of different surface finishing protocols on the surface roughness, color change and translucency of all-ceramic and metalceramic restorations. Materials and methods.Standardized disc-shaped specimens (1.5 mm x 10 mm, N=128)were fabricated using three different all-ceramic core materials (Al 2 O 3 -AL, ZrO 2 -ZR, Li 2 Si 2 O 5 -LIT) materials and veneered (V) with dentin ceramics (n=32 per group) constituting the following groups: ALV, ZRV, LITV. Metal-ceramic group acted as the control (MC) (n=32). Four different surface finishing methods were tested: Air-borne particle abrasion (AB) with 5...

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Section: Discussioncontrasting

confidence: 97%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effects of surface-finishing protocols on the roughness, color change, and translucency of different ceramic systems

Akar

Pekkan

Çal

et al. 2014

The Journal of Prosthetic Dentistry

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“…Base-metal alloy (Colado NC, Ivoclar Vivadent, Shaar, Liechtenstein) containing nickel-chrome with 0.5 mm thickness was used as substructure. A custom made two-pieces teflon mold which allows the standardization33 was used for preparation of the samples (Fig. 2).…”

Section: Methodsmentioning

confidence: 99%

The effect of repeated firings on the color change and surface roughness of dental ceramics

2014

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PURPOSEThe color of the ceramic restorations is affected by various factors such as brand, thickness of the layered the ceramic, condensation techniques, smoothness of surface, number of firings, firing temperature and thickness of dentin. The aim of this study was to evaluate the color change and surface roughness in dental porcelain with different thicknesses during repeated firings.MATERIALS AND METHODSDisc-shaped (N=21) metal-ceramic samples (IPS Classic; Ivoclar Vivadent; Shaar, Liechtenstein) with different thickness were exposed to repeated firings. Color measurement of the samples was made using a colorimeter and profilometer was used to determine surface roughness. ANOVA and Tukey tests with repeated measurements were used for statistical analysis.RESULTSThe total thickness of the ceramics which is less than 2 mm significantly have detrimental effect on the surface properties and color of porcelains during firings (P<.05).CONCLUSIONRepeated firings have effects on the color change and surface roughness of the dental ceramics and should be avoided.

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“…There are studies reporting that the thickness of the core and veneering ceramic has an effect on color and translucency of restoration . Lee et al reported that combinations of veneering and core ceramic thickness differed according to the type of ceramic material and hence the recommended thickness of the cores, even if the total thickness of the sample was set to 1.5 mm has an effect on restoration color .…”

Section: Introductionmentioning

confidence: 99%

The effect of repetitive firings on the color of an alumina ceramic system with varying ceramic shade and thickness

Şahin

Aydın

Akyel

et al. 2019

J Esthet Restor Dent

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Objective The color of all‐ceramic restorations is one of the main criteria to achieve esthetical success. Many factors such as ceramic thickness, condensation techniques, firing temperature, and numbers can affect the final color of restoration. The purpose of this study was to investigate the color changes in alumina‐based ceramic system according to ceramic shade and thickness during the multiple firings. Materials and Methods Sixty disc‐shaped specimens with two different veneering porcelain shades (A1 or A3), and with three different ceramic thicknesses (0.5, 1, or 1.5 mm), were fabricated from an alumina‐based ceramic system. Multiple firings (3, 5, 7, or 9 firings) were performed, and color changes (ΔE00) were determined using a spectrophotometer. Repeated‐measures ANOVA were used to analyze the data. The Duncan test was used for multiple comparisons (α = .05). Results The L*a*b* values of the specimens were affected by the number of firings (3, 5, 7, or 9), veneering ceramic shades (A1 or A3) and veneering ceramic thicknesses (0.5, 1, or 1.5 mm). Significant interactions were present between the number of firings, veneering ceramic shade, and veneering ceramic thickness for L* (p < .001), a* (p < .001), and b* (p < .001) values. Conclusions No statistically significant color change was observed between 3rd and 9th firings. Clinical Significance Veneering ceramic shade, veneering ceramic thickness, and number of firings should be carefully considered to obtain an acceptable color match of the definitive restorations.

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The effect of repeated firings on the color of an alumina ceramic system with two different veneering porcelain shades

Abstract: Imperceptible (ΔE<1.6) and clinically acceptable color changes (ΔE<3.7) were demonstrated by the alumina ceramic system tested.

Cited by 21 publications

References 38 publications

Effects of surface-finishing protocols on the roughness, color change, and translucency of different ceramic systems

Effects of surface-finishing protocols on the roughness, color change, and translucency of different ceramic systems

The effect of repeated firings on the color change and surface roughness of dental ceramics

The effect of repetitive firings on the color of an alumina ceramic system with varying ceramic shade and thickness

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