Turkiye Klinikleri Journal of Dental Sciences

.: ORIGINAL RESEARCH
Farklı Dijital Tarayıcılar ile Elde Edilen Ölçülerden CAD-CAM Sistemi ile Hazırlanan Zirkonya ile Güçlendirilmiş Lityum Silikat Kuronların Marjinal ve İnternal Aralıklarının Değerlendirilmesi: İn Vitro Bir Çalışma
Evaluation of Marginal and Internal Gap of Zirconia Reinforced Lithium Silicate Crowns Fabricated by CAD-CAM System from Measurements Obtained with Different Digital Scanners: An In Vtro Study
Zahide AYDINa, Nuran YANIKOĞLUa
aAtatürk Üniversitesi Diş Hekimliği Fakültesi, Protetik Diş Tedavisi ABD, Erzurum, Türkiye
Turkiye Klinikleri J Dental Sci. 2022;28(3):650-9
doi: 10.5336/dentalsci.2021-86103
Article Language: TR
Full Text
ÖZET
 Amaç: Bu in vitro çalışmada, farklı tarayıcı sistemler kullanılarak alınan ölçülerden, bilgisayar destekli tasarım ve bilgisayar destekli üretim [computer-aided design/computer-aided manufacturing (CAD/CAM)] yöntemi kullanılarak elde edilen zirkonya ile güçlendirilmiş lityum silikat kuronların marjinal ve internal aralık değerlerinin karşılaştırılması amaçlanmıştır. Gereç ve Yöntemler: Fantom çene üzerinde maksiller sağ 1. premolar dişin preparasyonu yapıldı. Restorasyonun üretilebilmesi için gerekli ölçüler, 3 farklı direkt dijital tarayıcı (Primescan, Trios 4, iTero Element 2) ve 1 adet indirekt dijital tarayıcı (Ceramill MAP400) ile elde edildi (4 grup, n=12). Restorasyonlar, zirkonya ile güçlendirilmiş lityum silikat bloklardan 5 akslı freze ünitesi ile üretildi. Marjinal aralık ve internal aralık değerleri, silikon replika yöntemi ile x10 büyütmeli ışık mikroskobu altında ölçüldü. Üç ve üzeri gruplara göre normal dağılmayan uyum değerlerinin karşılaştırılmasında Kruskal-Wallis; 2'li gruplara göre normal dağılmayan verilerin karşılaştırılmasında Mann-Whitney U testi kullanıldı. (p<0,05). Bulgular: Direkt yöntem, indirekt yönteme göre istatistiksel olarak daha düşük marjinal ve internal aralık değeri gösterdi (p<0,05). Ağız içi tarayıcılar arasında, marjinal ve internal aralık değeri bakımından istatistiksel olarak anlamlı düzeyde farklılık olduğu saptandı (p<0,05). En düşük uç aralık değeri Trios 4 (73,4±27,8 μm) ağız içi tarayıcısında kaydedildi. En düşük internal aralık değeri iTero Element 2 (81,6±36,8 μm) ağız içi tarayıcısında elde edildi. Sonuç: İntraoral dijital tarayıcılar kullanılarak, CAD-CAM yöntemiyle üretilen kuron restorasyonlardan klinik olarak kabul edilebilir marjinal ve internal aralık değeri elde edilmiştir (<90 μm). Ağız içi ve ağız dışı dijital tarayıcılardan elde edilen kuron restorasyonların, marjinal ve internal aralık değeri istatistiksel olarak anlamlı düzeyde farklılık göstermiştir (p<0,05).

Anahtar Kelimeler: CAD-CAM; internal aralık; marjinal aralık; zirkonya ile güçlendirilmiş lityum silikat
ABSTRACT
 Objective: In this in vitro study, it was aimed to compare the marginal and internal gap values of zirconia reinforced lithium silicate crowns fabricated using the computer-aided design/computeraided manufacturing method from the measurements taken using different scanning systems. Material and Methods: The maxillary right 1st premolar tooth was prepared on the phantom jaw. The necessary impression for the restoration were obtained with 3 different direct digital scanners (Primescan, Trios 4, iTero Element 2) and 1 indirect digital scanner (Ceramill MAP400) (4 groups, n=12). The restorations were fabricated from lithium silicate blocks reinforced with zirconia with a 5-axis milling unit. Marginal gap and internal gap values were measured using the silicon replica method under a light microscope with x10 magnification. In the comparison of non-normally distributed fit values for groups of 3 or more, Kruskal-Wallis; Mann-Whitney U test was used to compare data that were not normally distributed according to paired groups (p<0.05). Results: The direct method showed statistically lower marginal and internal gap values than the indirect method (p<0.05). A statistically significant difference was found between the intraoral scanners in terms of marginal and internal gap values (p<0.05). The lowest marginal gap value was recorded in the Trios 4 (73.4±27.8 μm) intraoral scanner. The lowest internal gap value was obtained with the iTero Element 2 (81.6±36.8 μm) intraoral scanner. Conclusion: Clinically acceptable marginal and internal gap values were fabricated from crown restorations produced by CAD-CAM method using intraoral digital scanner (<90 μm). The marginal and internal gap values of the crown restorations obtained from intraoral and extraoral digital scanners differed statistically significantly (p<0.05).

Keywords: CAD-CAM; internal gap; marginal gap; lithium silicate reinforced with zirconia
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