CAD/CAM sistemiyle hazýrlanan üç üyeli monolitik zirkonya ve zirkonyum destekli restorasyonlarýn FDI kriterlerine göre deðerlendirilmesi: Bir yýllýk klinik split-mouth çalýþmasý

GÝRÝÞ ve AMAÇ: Bu in vivo çalýþmanýn amacý, posterior bölgedeki 3 üyeli zirkonyum destekli ve monolitik zirkonya restorasyonlarýn klinik baþarýsýný deðerlendirmektir.
YÖNTEM ve GEREÇLER: Çalýþmamýza, simetrik (split-mouth) alt çene birinci molar eksikliði olan 3 üyeli sabit protetik tedavi gereksinimli 20 katýlýmcý dahil edilmiþtir. Hastalara CAD/CAM kullanýlarak toplam 40 adet köprü restorasyonu (20 adet monolitik zirkonya restorasyon (Zenostar T) ve 20 adet zirkonyum destekli restorasyonlarýn altyapýlarý (IPS e.max ZirCAD)) üretilmiþtir. Üstyapý veneer seramiði (IPS e.max Ceram) ile tabakalama tekniði kullanýlarak zirkonyum destekli restorasyonlarýn üretimi tamamlanmýþtýr. Klinik deðerlendirmeleri 1. hafta, 6. ay ve 1. yýlda FDI kriterleri kullanýlarak yapýldý. Ýstatistiksel analiz için “Friedman” ve “Wilcoxon” testi kullanýlmýþtýr.
BULGULAR: Elde edilen verilere göre çift tabakalý ve monolitik restorasyonlarda estetik kriterlerden “yüzey parlaklýðý”, “yüzeyel ve marjinal renklenme”, “renk uyumu ve translusensi”, “estetik ve anatomik form” deðerlerinde zaman içerisinde istatistiksel olarak anlamlý bir fark gözlenmemiþtir (p>0,05). Çalýþmamýzda, FDI’in fonksiyonel ve biyolojik kriterleri için elde edilen veriler çift tabakalý ve monolitik restorasyonlar için istatistiksel olarak anlamlý bulunmamýþtýr (p>0,05).
TARTIÞMA ve SONUÇ: FDI kriterleri kullanýlarak yapýlan incelemelerde “renk uyumu ve translusensi” deðerlendirmelerinde zirkonyum destekli restorasyonlarýn; “estetik ve anatomik form” deðerlendirmelerinde monolitik zirkonya restorasyonlarýn daha baþarýlý sonuçlar verdiði görülmüþtür. Çalýþmamýzda, zirkonya restorasyonlarýn 1 yýllýk klinik takibinde baþarý oraný %100 olarak belirlenmiþtir.

Evaluation of three-unit monolithic zirconia and zirconia-supported fixed partial dentures designed with CAD/CAM system by FDI criteria: A one year clinical split-mouth study

INTRODUCTION: The aim of this in vivo study was performed to evaluate and compare clinical success of 3-unit zirconia-supported and monolithic zirconia restorations in the posterior region.
METHODS: Twenty patients who required three-unit fixed partial dentures due to a missing first molar in both half jaws (split-mouth design) were included in this in vivo study. A total of 40 bridge restorations (20 restorations were monolithic zirconia (Zenostar T), and the framework of 20 were zirconia-supported restorations (IPS e.max ZirCAD)) were fabricated with CAD/CAM technology. Zirconia-supported restorations built with superstructure by hand-layering technique with veneering ceramic (IPS e.max Ceram). Clinical evaluations were made at 1. week, 6. months and 1. year using FDI criteria. Statistical analysis was performed using “Friedman” and “Wilcoxon” tests were used.
RESULTS: There was no statistically significant difference within the double-layer and monolithic restoration groups for aesthetic criteria (“Surface brightness”, “Superficial and marginal staining”, “Color matching and translucency”, “Aesthetic and anatomical form”) depending on time (p>0,05). The data obtained from this study according to the functional and biological criteria of FDI were not statistically significant for double-layer and monolithic restorations (p>0,05).
DISCUSSION AND CONCLUSION: According to the criteria of FDI, the zirconium supported restorations were found to be more successful in “Color matching and translucency” and monolithic zirconia restorations were found to be more successful in “Aesthetic and anatomical form” evaluation. In the present study, the success rate was determined as 100% in 1-year clinical follow-up of zirconia restorations.