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Journals / Meandros Medical And Dental Journal / 2026 / Volume: 25 Issue: 2

Impact of Er,Cr:YSGG Laser Debonding on the Mechanical Properties of Aged and Non-aged Lithium Disilicate Ceramics

Er,Cr:YSGG Lazer Debonding'in Yaşlandırılmış ve Yaşlandırılmamış Lityum Disilikat Seramiklerin Mekanik Özelliklerine Etkisi

Damla Ünlü(NUH NACI YAZGAN UNIVERSITY)0000-0002-9403-7407
Pınar Yıldız(nimet bayraktar ağız diş sağlığı hastanesi)0000-0002-8090-2885
Nazire Nurdan Çakır(NUH NACI YAZGAN UNIVERSITY)0000-0003-3137-7954
Pages
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Publication Date
2024-08-31
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AI Summary & Key Takeaways

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

Results: The results indicated that aging significantly reduced the flexural strength (p=0.031), however, laser debonding did not have a significant effect on the flexural strength or modulus of either aged or non-aged samples.

📌 3 Key Takeaways

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Objective & Hypothesis:Aim: The aim of this study is to evaluate the effects of Er,Cr:YSGG laser debonding on the mechanical properties of aged and non-aged lithium disilicate ceramics.
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Key Findings & Data:Material and Methods: A total of 36 lithium disilicate samples with dimensions of 14x4x1 mm were prepared.
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Conclusion & Impact:Results: The results indicated that aging significantly reduced the flexural strength (p=0.031), however, laser debonding did not have a significant effect on the flexural strength or modulus of either aged or non-aged samples.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:artificial aging · lithium disilicate · Cr:YSGG laser

Abstract

Aim: The aim of this study is to evaluate the effects of Er,Cr:YSGG laser debonding on the mechanical properties of aged and non-aged lithium disilicate ceramics. Material and Methods: A total of 36 lithium disilicate samples with dimensions of 14x4x1 mm were prepared. Half of the samples underwent 5000 thermal cycles to simulate artificial aging. The aged and non-aged samples were divided into two subgroups: one subgroup was designated as the control group and did not receive laser treatment, while the other subgroup was treated with Er,Cr:YSGG laser for debonding (n=9). The flexural strength and modulus of the lithium disilicate samples were assessed using three-point bending tests before and after artificial aging. The surface roughness of a sample that did not undergo the three-point bending test was measured with AFM, its microhardness was assessed using Vickers hardness tests, and surface morphology was examined with FESEM. Two-way ANOVA and Bonferroni correction to determine the significance of the results were used for statistical analysis. Results: The results indicated that aging significantly reduced the flexural strength (p=0.031), however, laser debonding did not have a significant effect on the flexural strength or modulus of either aged or non-aged samples. Conclusion: Laser debonding effectively removes lithium disilicate restorations without compromising their mechanical properties, supporting their reuse in clinical practice. It is important to note that aging reduces the flexural strength of lithium disilicate ceramics.

Özet

Amaç: Bu çalışmanın amacı, Er,Cr:YSGG lazer debonding işleminin yaşlandırılmış ve yaşlandırılmamış lityum disilikat seramiklerin mekanik özellikleri üzerindeki etkilerini değerlendirmektir. Gereç ve Yöntemler: 14x4x1 mm boyutlarında toplam 36 lityum disilikat numunesi hazırlandı. Numunelerin yarısı yapay yaşlanmayı simüle etmek için 5000 termal döngüye tabi tutuldu. Yaşlandırılmış ve yaşlandırılmamış numuneler iki alt gruba ayrıldı: bir alt grup kontrol grubu olarak adlandırıldı ve lazer tedavisi uygulanmadı, diğer alt gruba ise debonding işlemi için Er,Cr:YSGG lazer uygulandı (n=9). Lityum disilikat numunelerinin eğilme mukavemeti ve modülü, yapay yaşlandırmadan önce ve sonra üç nokta eğme testleri kullanılarak değerlendirildi. Üç nokta eğme testi uygulanmamış bir örneğin yüzey pürüzlülüğü AFM ile ölçüldü, mikro sertliği Vickers sertlik testleri kullanılarak değerlendirildi ve yüzey morfolojisi FESEM ile incelendi. Veriler, sonuçların önemini belirlemek için iki yönlü ANOVA ve Bonferroni düzeltmesi kullanılarak analiz edildi. Bulgular: Sonuçlar, yaşlanmanın eğilme mukavemetini önemli ölçüde azalttığını (p=0,031) ancak lazerle debondingin, yaşlandırılmış veya yaşlandırılmamış numunelerin eğilme mukavemetini veya modülünü önemli ölçüde etkilemediğini gösterdi. Sonuç: Lazerle debonding, lityum disilikat restorasyonları, restorayonların mekanik özelliklerini tehlikeye atmadan etkili bir şekilde çıkarır ve klinik uygulamada yeniden kullanımlarını destekler. Yaşlanmanın lityum disilikat seramiklerin eğilme mukavemetini azalttığı unutulmamalıdır.

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Cite This Article

Ünlü, D., Yıldız, P., Çakır, N. N. (2024). Impact of Er,Cr:YSGG Laser Debonding on the Mechanical Properties of Aged and Non-aged Lithium Disilicate Ceramics. Meandros Medical And Dental Journal, Volume: 25 Issue: 2. https://doi.org/10.69601/meandrosmdj.1523793

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