Changes in optical properties of enamel porcelain after repeated external staining

Cho, Moon-Sang; Lee, Yong-Keun; Lim, Bum-Soon; Lim, Young‐Jun

doi:10.1016/j.prosdent.2006.04.002

Cited by 27 publications

(21 citation statements)

References 19 publications

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“…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%

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: Introductionmentioning

confidence: 99%

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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“…Still, most of these materials suffer deterioration to some degree: they get dark and lose transparency and luster 1 . Factors responsible for the deterioration include staining drinks and elevated temperatures 2,3 . These external influences make the proper choice of the material hue more difficult 4 .…”

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confidence: 99%

Color and Luminescence Stability of Selected Dental Materials In Vitro

Gawriołek

Sikorska

Ferreira

et al. 2012

Journal of Prosthodontics

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Unpolished specimens with a more developed surface have lower color stability. Specimens stored in water develop some changes in their visual appearance. The presently proposed methods are effective in evaluating the luminescence of dental materials. Luminescence needs to be tested in addition to color, as the two characteristics are uncorrelated. It is important to further improve the color and luminescence stability of dental materials.

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“…The appearance and color properties of a ceramic restoration may be affected by a variety of factors that may arise because of material or method differences. Thickness differences in the porcelain layers, surface finishing procedures, the number of firings, and surface staining were the most frequently investigated ones (26)(27)(28)(29)(30)(31)(32). Moreover, there are studies in the literature reporting that different metal substructures may affect the final shade of restorations (33,34).…”

Section: Discussionmentioning

confidence: 99%

Assessment of thicknesses and color properties of opaque porcelain layers applied by different dental technicians

Pişkin¹,

Sipahi²,

Ayyıldız³

et al. 2014

Gulhane Med J

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The aim of the present study was to evaluate the effect of individual manipulative variations on the thickness and color values of opaque porcelain layers applied by different dental technicians. A total of 11 dental technicians applied opaque porcelain onto prepared metal specimens (n=10). The thicknesses of these opaque porcelain layers were measured with an ultrasonic device, and color values were evaluated using a spectrophotometer. Obtained values were compared with those of the control group specimens (n=10), which were fabricated by a prosthodontist. Opaque porcelain thickness values of metal specimens applied by 10 dental technicians were significantly different than those of the control group. Color values of opaque porcelain layer applied by nine dental technicians were significantly different than those of the control group. It was concluded that the opaque porcelain layer thickness and color values may be affected by individual manipulative variations by the different dental operators according to results of present study. ÖZET Farklı dental teknisyenler tarafından uygulanan opak porselen tabakasının kalınlık ve renk özelliklerinin incelenmesiBu çalışmanın amacı, kişisel uygulama farklılıklarının, farklı diş teknisyenleri tarafından tatbik edilen opak porselen tabakasının kalınlık ve renk değerlerine olan etkisinin değerlendirilmesidir. Çalışma için toplam 11 diş teknisyeni, önceden hazırlanmış metal örneklere (n=10) opak porselen uyguladılar. Opak porselen tabakası kalınlıkları bir ultrasonic ölçüm cihazı ile, renk değerleri ise spektrofotometre cihazı ile saptandı. Elde edilen değerler, bir prostodontist tarafından üretilen örneklerin oluşturduğu kontrol grubu değerleri ile karşılaştırıldı. 10 diş teknisyeni tarafından uygulanan opak porselen tabakası kalınlık değerleri control grubundan anlamlı bir şekilde farklı bulunmuştur. Dokuz diş teknisyenin uyguladığı opak porselen tabakası renk değerleri control grubundan anlamlı bir şekilde farklıdır. Bu çalışmanın sonuçlarına gore, opak porselen tabakası kalınlığı ve renk değerleri, kişisel uygulama faklılıklarından etkilenebilmektedir.Anahtar Kelimeler: Opak porselen tabakası, diş teknisyeni, uygulama farklılıkları.

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Changes in optical properties of enamel porcelain after repeated external staining

Cited by 27 publications

References 19 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

Color and Luminescence Stability of Selected Dental Materials In Vitro

Assessment of thicknesses and color properties of opaque porcelain layers applied by different dental technicians

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