Evaluation of the Effect of Different Finishing and Polishing Procedures on the Color Change and Translucency Properties of Monolithic CAD/CAM Ceramic

Yıl 2024, Cilt: 6 Sayı: 3, 306 - 313, 30.12.2024

Seda Üstün Aladağ , Elif Aydoğan Ayaz

https://doi.org/10.51122/neudentj.2025.130

Öz

Aim: The purpose of the study was to compare the effect of different finishing and polishing procedures of the monolithic CAD-CAM ceramic on optical properties after ultraviolet (UV) aging.
Material and Methods: The zirconia reinforced lithium silicate ceramic (Vita Suprinity) was selected for this study in 1.5 mm thickness. Totally 42 specimens were prepared and divided randomly to six groups based on the finishing-polishing techniques with disc, polishing paste and glazing or combinations (n=7). Color change measurements of the specimens were performed on a gray background before and after UV aging. Translucency values on white and black background were calculated after UV aging according to CIEDE2000 formula. The Kruskal Wallis H and post-hoc Dunn tests were used for the statistical anlayses (P<0.05).
Results: Effect of finishing-polishing procedures were found statistically significant in terms of color change and translucency (P<0.001). The highest color change was found in the just crystallized specimens. The specimens polished with polishing paste after crystallization and glazing showed the lowest color change. The lowest translucency were presented in the specimens that just crystallized. The highest translucency were presented in ceramics crystallized with glaze and also presented statistical difference when compared to crystallized, crystallized+polished with discs, and crystallized+polished with polishing paste ceramics (P<0.001).
Conclusion: Finishing the ceramic restorations is an important step for long term clinical use. Glazing or mechanical polishing of the zirconia reinforced lithium silicate ceramic produce similar results in terms of optical properties. Crystallization with glazing together can be used as a quick and reliable finishing.

Anahtar Kelimeler

Computer-aided design, Color, Ceramics, Dental materials

Monolitik CAD/CAM Seramiğin Renk Değişimi ve Yarı Saydamlık Özellikleri Üzerinde Farklı Bitirme ve Polisaj Prosedürlerinin Etkisinin Değerlendirilmesi

Öz

Amaç: Bu çalışmanın amacı, farklı bitim ve polisaj prosedürlerinin monolitik CAD/CAM seramiğin optik özellikleri üzerindeki etkisini UV yaşlandırma sonrası karşılaştırmaktır.
Gereç ve Yöntemler: Bu çalışma için 1,5 mm kalınlığında zirkonya ile güçlendirilmiş lityum silikat seramik (Vita Suprinity) seçildi. Toplam 42 adet örnek hazırlanarak disk, polisaj pastası, glaze veya kombinasyonları ile bitirme ve cilalama tekniklerine göre rastgele altı gruba ayrıldı (n=7). Örneklerin renk değişimi ölçümleri, UV yaşlandırma öncesi ve sonrası gri bir arka plan üzerinde gerçekleştirildi. Beyaz ve siyah zemin üzerindeki translüsensi değerleri ise UV yaşlandırma sonrası CIEDE2000 formülüne göre hesaplandı. İstatistiksel analizlerde Kruskal Wallis H ve post-hoc Dunn testleri kullanıldı (P<0.05).
Bulgular: Renk değişimi ve translüsensi açısından bitirme ve polisaj prosedürlerinin etkisi istatistiksel olarak anlamlı bulundu (P<0.001). En yüksek renk değişimi yalnızca kristalize örneklerde görüldü. En düşük renk değişimini kristalizasyon ve glaze sonrası polisaj pastası ile polisajlanan örnekler sergiledi. En düşük translüsensi parametrelerini yalnızca kristalize örnekler sundu. En yüksek translüsensi parametreleri glaze ile birlikte kristalize edilen seramiklerde ortaya çıktı ve kristalizasyon, kristalizasyon+disk ile cilalama ve kristalizasyon+parlatma pastası ile cilalama ile karşılaştırıldığında istatistiksel olarak farklılık gösterdi (P<0.001).
Sonuç: Seramik restorasyonların bitirilmesi uzun süreli klinik kullanım için önemli bir adımdır. Zirkonya ile güçlendirilmiş lityum silikat seramiğin glazelenmesi veya mekanik olarak parlatılması, optik özellikler açısından benzer sonuçlar verir. Glaze ile birlikte kristalizasyon, hızlı ve güvenilir bir son işlem olarak kullanılabilir.

Anahtar Kelimeler

Bilgisayar destekli tasarım, Renk, Seramikler, Dental materyaller

Kaynakça

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