Comparison of fracture strengths of fiber-reinforced composite crowns and IPS Empress all ceramic crowns

Yıl 2013, Cilt: 30 Sayı: 1, 25 - 31, 11.03.2013

Ahmet Kürşat Çulhaoğlu Ali Zaimoğlu Serhat Emre Özkır

Öz

OBJECTIVE: The aim of this study was to compare fracture strength of fiber reinforced indirect composite systems (SR Adoro/Vectris and BelleGlass NG/Construct) with a full ceramic system (IPS Empress 2). Moreover, the effect of 2 different margin preparations (1 mm chamfer and0.8 mm shoulder preparation) on fracture strength was evaluated.

MATERIALS AND METHOD: Preparing 20 crown samples from each material group, ten from chamfer and ten from shoulder, a total of 60 samples were subjected to fracture strength test. Lloyd LRX universal testing device and Nexygen computer software were used to evaluate fracture resistance of the samples.

RESULTS: The results were measured in Newton and the data were statically evaluated using Kruskal Wallis test. As a result of statical evaluations, fracture strength of fibrereinforced indirect composite materials was found to be greater than that of full ceramic system IPS Empress. While the fiber-reinforced composite system BelleGlass NG/Construct had the highest fracture strength values, IPS Empress full ceramic system had the lowest fracture resistance values. (IPS Empress 2: 845.95±119.7 N, SR Adoro/Vectris: 942.67±136.6 N, BelleGlass NG/Construct: 1187.93±383.5 N). Besides, it was found that the shoulder preparation ensured a more resistant crown structure than the chamfer preparation did.

CONCLUSION: It was concluded that the fiber-reinforced indirect composites’ fracture strength was greater than that of the full ceramic system, and that the shoulder preparation formed a more resistant structure than the chamfer preparation.

Anahtar Kelimeler

Fiber-Reinforced Indirect Composite, Fracture Strength, Full Ceramic, Margin Preparation

Fiberle güçlendirilmiş indirekt kompozit kronların kırılma dirençlerinin IPS Empress tam seramik kronlar ile karşılaştırılması

Öz

AMAÇ: Bu çalışmada fiberle kuvvetlendirilmiş indirekt kompozit sistemlerinin (SR Adoro/Vectris ve BelleGlass NG/Construct) kırılma direnci tam seramik sistemi (IPS Empress 2) ile karşılaştırılması amaçlanmıştır. Ayrıca bu materyallerin kırılma direnci üzerine farklı basamak preparasyonunun (1 mm oluk biçimli basamak ve0.8 mm dik açılı basamak) etkisinin olup olmadığı da incelenmiştir.GEREÇ VE YÖNTEM: Her materyal grubundan 10 adet oluk biçimli basamak, 10 adet dik açılı basamak olmak üzere toplam 20’şer adet kron örnek hazırlanarak toplam 60 örnek mekanik direnç testine tabi tutulmuştur. Kırılma direnci testleri için Lloyd LRX cihazı ve Nexygen bilgisayar yazılımı kullanılmıştır.BULGULAR: İstatistiksel değerlendirmeler neticesinde fiber destekli indirekt kompozit materyallerinin kırılma direnci açısından tam seramik sistemi IPS Empress 2’den daha başarılı olduğu bulunmuştur. En yüksek kırılma direnci değerlerini BelleGlass NG/Construct fiberle kuvvetlendirilmiş indirekt kompozit sistemi gösterirken, en düşük kırılma direncini IPS Empress 2 tam seramik sistemi göstermiştir (IPS Empress 2: 845.95±119.7 N, SR Adoro/Vectris: 942.67±136.6N, BelleGlass NG/Construct: 1187.93±383.5 N).SONUÇ: Fiberle güçlendirilmiş indirekt kompozitlerin kırılma direncinin tam seramik sistemin kırılma direncinden daha yüksek olduğu ve dik açılı basamak preparasyonunun, oluk biçimli basamak preparasyonuna göre daha dirençli bir yapı oluşturduğu saptanmıştır.

Anahtar Kelimeler

Basamak Preparasyonu, Fiberle Güçlendirilmiş İndirekt Kompozit, Kırılma Direnci, Tam Seramik

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