Journals / Selcuk Dental Journal / 2017 / Cilt: 4 - Sayı: 3

The effect of firing number and ceramic thickness on colour change of metal-ceramic restorations

ÖZ Metal-seramik restorasyonlarda fırınlama sayısı ve seramik kalınlığının renk değişimine etkisi

Pages
123–127
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

Conclusion: Repeated firings affect the color stability of the ceramics and this effect varies between brands

📌 3 Key Takeaways

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Objective & Hypothesis:Background: The aim of the study was to evaluate color change of metal supported ceramics of different thicknesses and brands after repeated firings.
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Key Findings & Data:Methods: Veneer ceramic specimens on metal substructures were prepared from two different brands (Vita VMK Master, GC Initial)with two different thicknesses (1-1,5 mm).
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Conclusion & Impact:Conclusion: Repeated firings affect the color stability of the ceramics and this effect varies between brands
🔬Design:Research Article
📍Scope:20 specimens
⚙️Variables:Domain Parameters

Abstract

Background: The aim of the study was to evaluate color change of metal supported ceramics of different thicknesses and brands after repeated firings. Methods: Veneer ceramic specimens on metal substructures were prepared from two different brands (Vita VMK Master, GC Initial)with two different thicknesses (1-1,5 mm). Each group contained 20 specimens. The veneer ceramic was fired for two times and then the initial colour measurement was performed with spectrophotometer. Each specimen was measured for 3 times and their mean was taken. Color measurements were repeated after 3, 5, 7 and 9 firings and color change (ΔE) values were estimated. The obtained data was analyzed with repeated analysis of variance and the comparisons between the groups were carried out with Tukey’s HSD test. Results: The ceramic thickness did not cause any statistically significant ΔE value. However the ΔE values between the brands were statistically significant; groups of GC displayed higher ΔE values after all firing cycles compared with groups of Vita. The ΔE values increased significantly with the increase of number of firings. Conclusion: Repeated firings affect the color stability of the ceramics and this effect varies between brands

Özet

Amaç: Bu çalışmanın amacı metal alt yapı üzerindeki farklı kalınlık ve markalara ait vener seramiklerin tekrarlayan fırınlamalar sonrası renk değişimlerini incelemektir. Gereç ve Yöntemler: İki farklı markaya ait vener seramik (Vita VMK Master, GC Initial) ile metal altyapı üzerinde iki farklı kalınlıkta (1 ve 1,5 mm) örnekler hazırlanmıştır. Her bir grup için örnek sayısı 20 olarak saptanmıştır. Porselen örnekler 2 kez fırınlandıktan sonra başlangıç renk ölçümü spektrofotometre ile yapılmıştır. Her örneğin renk ölçümü 3 kez tekrar edilmiş, ortalaması alınarak değerlendirilmiştir. Ölçümler 3, 5, 7 ve 9 fırınlama sonrası tekrarlanmıştır ve renk değişim değerleri (?E) elde edilmiştir. Verilerin değerlendirilmesinde tekrarlayan varyans analizi ve grupların karşılaştırılmasında ise Tukey's HSD testi kullanılmıştır. Bulgular: Seramik kalınlığının ?E değerinde istatistiksel olarak anlamlı farklılık yaratmadığı saptanmıştır. Markalar arasında ise ?E değeri açısından istatistiksel olarak anlamlı farklılık mevcuttur. GC markası grupları bütün fırınlama döngüleri sonrasında Vita markası gruplarına göre daha fazla renk değişimi göstermiştir. Fırınlama sayısının artmasıyla birlikte örneklerin renk değişimi istatistiksel olarak anlamlı derecede artmıştır. Sonuç: Tekrarlayan fırınlama işlemleri seramiğin renk stabilitesini etkilemektedir ve bu etki markalar arasında farklılıklar gösterebilmektedir.

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Cite This Article

TUNCEL, İ., TURP, I., DÜÇ?, B., SELÇUKER?, A. H., ASLANTAŞ?, A., BEKMAN?, E. (2017). The effect of firing number and ceramic thickness on colour change of metal-ceramic restorations. Selcuk Dental Journal, Cilt: 4 - Sayı: 3, 123–127. https://ajindex.com/articles/301623

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