Işıl Çekiç Nagaş, Ferhan Eğilmez, Gülfem Ergün, Pekka Vallittu, Lippo Lassila

Farklı yüzey bitirme ve parlatma uygulamalarının nano-hibrit ve polimer infiltre seramiklerin ışık geçirgenliğine etkisi

Amaç: Bu çalışmanın amacı, farklı yüzey işlemlerinin üç farklı estetik bilgisayar yardımlı tasarım/bilgisayar yardımlı imalat (BYT/BYİ; CAD/CAM) materyalinin (Vita Enamic, Cerasmart, Lava Ultimate) ışık geçirgenliği üzerine etkilerinin değerlendirilmesidir.Gereç ve Yöntem: Nano-hibrit ve polimer infiltre seramik ağ yapısına sahip CAD/CAM blokların (Vita Enamic, Lava Ultimate, Cerasmart) her birinden 35 örnek hazırlandı (n=105). Örnekler daha sonra uygulanan yüzey işlemine göre 5 alt gruba ayrıldı (n=7/grup). Grup 1: Kontrol grubu olarak silikon karbid zımpara (#1000 ve #4000 grit), Grup 2: Aluminyum oksit bitirme ve polisaj diski (Sof-Lex disk), Grup 3: Elmas dolduruculu parlatıcılı pat (Diapolisher Paste), Grup 4: Elmas cila diski (Diacomp Plus Twist), Grup 5: Silikon cila lastiği (Polydentia). Bitirme ve parlatma işlemlerinden sonra, örneklerin plazma ark altındaki ışık geçirgenlikleri radyometre ile ölçüldü. İstatistiksel analiz, iki-yönlü ANOVA ve Tukey post-hoc testleri ile yapıldı (α=0.05).Bulgular: Ana etkiler bakımından, CAD/CAM hibrit seramik materyalleri arasında ışık geçirgenliği açısından anlamlı farklılık gözlendi (p<0.05): Cerasmart (%83.3±3.7), Vita Enamic (%80.5±5.3) ve Lava Ultimate (%76.5±4.9). Farklı yüzey bitirme ve parlatma işlemlerinin ışık geçirgenliği üzerine anlamlı etkisi yoktu (p=0.608). Bununla beraber, materyal ve işlem interaksiyonunda ışık geçirgenliği üzerine anlamlı etki bulundu (p<0.05).Sonuç: Yüzey bitirme ve parlatma uygulanması, nano-hibrit ve polimer infiltre seramik ağ yapılı blokların ışık geçirgenliği özelliğini etkileyebilmektedir.

Anahtar Kelimeler:

Bilgisayar yardımlı tasarım, bilgisayar yardımlı imalat, ışık, seramikler

The effect of different surface treatments on light transmittance of nano-hybrid and polymer-infiltrated ceramics

Objective: The aim of this study was to evaluate the effect of different surface treatments on the light transmittance of three different esthetic computer-aided design/computer-aided manufacturing (CAD/CAM) materials (Vita Enamic, Cerasmart, Lava Ultimate).Materials and Method: Thirty-five specimens from each of nano-hybrid and polymer-infiltrated ceramic network-structured CAD/CAM blocks (Vita Enamic, Lava Ultimate, Cerasmart) were prepared (n=105). Then the specimens were divided into 5 sub-groups according to the applied surface treatment (n=7/group). Group 1: Sandpaper (#1000 and #4000 grit SiC paper) as control, Group 2: Aluminium oxide finishing and polishing disc (Sof-Lex Disk), Group 3: Diamond filled polishing paste (Diapolisher Paste), Group 4: Diamond polishing disc (Diacomp Plus Twist) and Group 5: Silicone rubber polisher (Polydentia). Following finishing and polishing procedures of the specimens, the light transmittance of the specimens under plasma arc light-curing unit was measured by using a hand-held radiometer. Statistical significance was determined using two-way ANOVA and Tukey post-hoc tests (α=0.05).Results: Regarding the main effects, significant difference was observed between the light transmittance values of the CAD/CAM hybrid ceramic materials (p<0.05): Cerasmart (83.3%±3.7), Vita Enamic (80.5%±5.3), and Lava Ultimate (76.5%±4.9). Different surface finishing and polishing procedures had no significant effect on the light transmittance values (p=0.608). However, the material and procedure interaction revealed a significant effect on the light transmittance values (p<0.05).Conclusion: Application of surface finishing and polishing procedures might affect the light transmission property of nano-hybrid and polymer infiltrated ceramic network structured CAD/CAM blocks.

Keywords:

Ceramics, computer-aided design, computer-aided manufacturing, light,

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