Zirkonya Kronlarda Farklı Sinter Prosedürleri ve Veneer Pişirmeleri ile Birlikte Görülen Boyutsal ve Marjinal Aralık Değişimleri

Amaç: Dental restorasyonların marjinal uyumu, uzun vadeli başarı için hayati bir faktördür. Yüksek sıcaklıklarda birden fazla sayıda fırınlamayı içeren zirkonyum veneerleme işleminin, zirkonya altyapıların marjinal uyumunu etkilediği gösterilmiştir. Bu çalışmanın amacı, farklı prosedürlerle sinterlenmiş zirkonya iskeletlerin veneerleme pişirimleri sırasındaki boyutsal ve marjinal boşluk değişimlerini gözlemlemektir. Gereç ve Yöntemler: 30 Y-TZP ((inCoris ZI, Sirona, Bensheim, Almanya) kuron altyapısı 8 saat, 2 saat ve 10 dakikalık üç farklı süre ile sinterlendi. Ölçüm mikroskobu ile referans noktalarına dayalı oklüzal ve bukkal boyutsal ölçümler yapıldı. Pişirme işleminin etkisini gözlemlemek için porselen malzemesi uygulanmadan veneer pişirmeleri yapıldı. Tüm boyutsal ve marjinal boşluk ölçümleri tekrarlandı ve veneer fırınlamasından önce ve sonra alınan veriler tek yönlü ANOVA ve eşleştirilmiş t testi ile analiz edildi. Bulgular: Üç grubun sinterleme büzülmesi arasında önemli bir farklılık gözlenmedi. Marjinal boşluklar tüm gruplarda veneer pişirmelerinden sonra azaldı ve azalma 2 saat ve 10 dakikalık sinterleme gruplarında anlamlıydı (p

Anahtar Kelimeler:

dental araştırma, dental porselen, prostodonti, seramikler

A Study on Dimensional and Marginal Gap Changes Through Application of Different Sintering Methods and Veneer Firings on Zirconia Crowns

Background: The marginal fit of dental restorations is a vital factor for long-term success. The veneering process of zirconia, which involves multiple firings at high temperatures, has shown to affect the marginal fit of zirconia cores. The aim of this study is to observe dimensional and marginal gap changes during veneer firing of zirconia frameworks sintered with different procedures. Methods: 30 Y-TZP ((inCoris ZI, Sirona, Bensheim, Germany) crown frameworks sintered with three different durations of 8 hours, 2 hours and 10 minutes. Occlusal and buccal dimensional measurements based on reference points measured with toolmaker’s microscope. Frameworks subjected to veneer firings without application of veneering material to observe the effect of firing process only. All dimensional and marginal gap measurements were repeated and after veneer firings. Data were analysed with one-way ANOVA and paired t test. Results: No significant differences observed between the sintering shrinkage of three groups. Marginal gaps decreased after veneer firings for all groups and the decrease was significant for 2 hour and 10-minute sintering groups (p

Keywords:

ceramics, dental porcelain, dental research, prosthodontics,

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