Amaç: Bu çalışmanın amacı; indirekt restorasyonların üretiminde sıklıkla kullanılmaya başlanan seramik, kompozit ve hibrit yapıdaki farklı bilgisayar destekli tasarım ve bilgisayar destekli üretim (CAD/CAM) materyallerinin bükülme dayanımını ve elastisite modülünü değerlendirmektir. Gereç ve Yöntemler: Her bir grup için farklı CAD/CAM bloklarından (Paradigm? MZ100, Lava? Ultimate, Cerasmart ®, IPS e.max® CAD ve VITA Enamic®) 18x3x3 mm boyutlarında 10'ar adet örnek hazırlanmıştır. Bükülme dayanımı değerlerinin belirlenmesi için 3-nokta bükülme testi uygulanmıştır. Elastisite modülü ise; gerilim/gerinim grafiğinin eğiminden otomatik olarak hesaplanmıştır. Elde edilen bükülme dayanımı ve elastisite modülü değerlerinin normal dağılıma uygunluğu kontrol edildikten sonra, materyallerin birbirleri ile karşılaştırılması tek yönlü varyans analizi (ANOVA) ve post-hoc Tukey HSD testi ile yapılmıştır. Tüm analizlerde istatistik anlamlılık düzeyi α=0,05 olarak kabul edilmiştir. Bulgular: IPS e.max® CAD materyalinin bükülme dayanımı (378,91±49,17 Mpa) ve elastisite modülü (37,05±0,26 Mpa) değerleri diğer materyallerden istatistiksel olarak anlamlı derecede yüksek bulunmuştur. En düşük elastisite modülü (11,33±1,34) değerleri Cerasmart ® materyalinde belirlenmiştir. Sonuç: Çalışmamızın sonuçlarına göre; en yüksek bükülme dayanımı ve elastisite modülü değerleri seramik içerikli materyal olan IPS e.max® CAD'de bulunmuştur.
Anahtar Kelimeler: Bükülme dayanımı; elastisite modülü; hibrit; seramik; kompozit
Objective: The aim of this study was to evaluate the flexural strength and elastic modulus of different computer-aided design/ computer-aided manufacturing (CAD/CAM) materials in ceramic, composite and hybrid structures which are used frequently in the production of indirect restorations. Material and Methods: For each group 10 samples were prepared from different CAD/CAM blocks (Paradigm? MZ100, Lava? Ultimate, Cerasmart®, IPS e.max® CAD ve VITA Enamic®) with dimensions 18x3x3 mm. The 3- point bending test was performed to determine the flexural strength values. The modulus of elasticity is calculated automatically from the slope of the stress/strain graph. After comparison of the flexural strength and elastic modulus values to normal distribution, the comparison of the materials with each other was analyzed by one-way variance analysis (ANOVA) and post-hoc Tukey HSD test. Statistical significance level was accepted as 0.05 in all analyzes. Results: The flexural strength (378.91±49.17 MPa) and elastic modulus (37.05± 0.26 MPa) of IPS e.max® CAD material were found to be significantly higher than the other materials. The lowest elastic modulus of 11.33±1.34 showed the Cerasmart® material. Conclusion: According to the results of our study; the highest bending strength and elastic modulus values were found in IPS e.max® CAD, a ceramiccontaining material.
Keywords: Flexural strength; elastic modulus; hybrid; ceramic; composite
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