Bora AKAT, Merve ÇAKIRBAY TANIŞ, Mehmet Ali KILIÇARSLAN

Evaluation of fracture strength of different CAD/CAM veneers that are manufactured for zirconia cores

Amaç. Bu çalışmanın amacı, farklı veneer materyalleri ve işlemleri ile hazırlanmış basit ve anatomik kor tasarımları kullanarak kaplanmış zirkonya altyapılı kronların kırılma direncini değerlendirmektir. Gereç ve Yöntemler. Anatomik bir çekirdek tasarımı veya basit bir çekirdek tasarımı ile toplam 100 zirkonya kron altyapısı üretildi. Bu kor altyapılar daha sonra aşağıdaki veneerleme prosedürlerine göre beş alt gruba ayrıldı: Kontrol (katmanlama), simante CAD/CAM fabrikasyon feldspatik veneer, simante CAD/CAM fabrikasyon lityum disilikat veneer, porselenle kaynaştırılmış CAD/CAM fabrikasyon feldspatik veneer ve porselenle kaynaştırılmış CAD/CAM fabrikasyon lityum disilikat kaplama. Daha sonra, bir çiğneme simülatöründe 1,6 Hz'de 50 N'luk bir oklüzal yük ile 250000 döngü uygulandı ve yükleme sırasında bir termal döngü uygulandı (her 60 saniyede bir 5°C ila 50°C). Kronlar daha sonra evrensel bir test makinesi kullanılarak kırma testine tabi tutuldu. Bulgular. Gruplar arasında istatistiksel analizler önemli farklılıklar gösterdi (F= 23.296; p

Anahtar Kelimeler:

Zirkonya Kron, Altyapı Tasarımı, Dental CAD/CAM, Kırılma Dayanımı, Veneering

Evaluation of fracture strength of different CAD/CAM veneers that are manufactured for zirconia cores

Background. The purpose of this study was to evaluate the fracture resistance of zirconia crowns veneered with CAD/CAM fabricated veneers by using simple and anatomic core designs with different veneering materials and procedures. Methods. A total of 100 zirconia frameworks were fabricated with an anatomic core design or simple core design. The frameworks were then divided into five subgroups according to the following veneering procedures: Control (layering), cemented CAD/CAM fabricated feldspathic veneer, cemented CAD/CAM fabricated lithium disilicate veneer, fused CAD/CAM fabricated feldspathic veneer, and fused CAD/CAM fabricated lithium disilicate veneer. Next, 250000 cycles were applied with an occlusal load of 50 N at 1.6 Hz in a chewing simulator, and a thermal cycle was applied during loading (5°C to 50°C every 60 s). The crowns were then subjected to a single load failure test by using a universal test machine. Results. Statistical analyses between the groups showed significant differences (F= 23.296; p

Keywords:

Dental CAD/CAM, Zirconia Crowns, Core Design, Fracture Strength, Veneering,

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