Turkiye Klinikleri Journal of Dental Sciences

.: ORIGINAL RESEARCH
Farklı Yöntemler ile Elde Edilen Metal Alaşımlarına Seramiklerin Bağlanma Dayanımının Farklı Test Metotları ile Değerlendirilmesi
Evaluation of the Bond Strength of Ceramics to Metal Alloys Obtained by Different Techniques Using by Different Testing Methods
Fehmi GÖNÜLDAŞa, Pelin ATALAYa, Doğan Derya ÖZTAŞa, Caner ÖZTÜRKb
aProtetik Diş Tedavisi AD, Ankara Üniversitesi Diş Hekimliği Fakültesi, Ankara, TÜRKİYE
bProtetik Diş Tedavisi AD, Hatay Mustafa Kemal Üniversitesi Diş Hekimliği Fakültesi, Hatay, TÜRKİYE
Turkiye Klinikleri J Dental Sci. 2019;25(1):55-62
doi: 10.5336/dentalsci.2018-62818
Article Language: TR
Full Text
ÖZET
 Amaç: Metal destekli porselen restorasyonlar sahip oldukları üstün mekanik özellikler gibi avantajları ile yaygın olarak kullanılan tedavi seçenekleridir. Farklı yöntemlerle elde edilen Co-Cr alaşımlarının metal-porselen bağlanma dayanımlarını, iki farklı test metodu kullanarak değerlendirmektir. Gereç ve Yöntemler: Bu çalışmada, Co-Cr alaşım örnekler selektif lazer sinterleme (n=20) ve geleneksel döküm yöntemi (n=20) kullanılarak hazırlandı ve 4 alt grup (n=10) oluşturuldu. Geleneksel döküm ve selektif lazer sinterleme ile elde edilen örneklere üç nokta bükme testi için, ISO 9693'e göre toplam 1,1 mm kalınlığında olacak şekilde porselen tabakası uygulandı. Makaslama bağlanma dayanımı testi için ise örneklere 4 mm çapında ve 4 mm kalınlığında porselen tabaka uygulandı. Örneklere, universal test cihazı kullanılarak 1,5 mm/dk hız ve 90o açı ile üç nokta bükme testi ve 0,5 mm/dk hızla makaslama bağlanma dayanımı testi uygulanarak, metal-porselen bağlanma dayanımları ölçüldü. Elde edilen veriler tek yönlü varyans analizi kullanılarak p<0,05 anlamlılık düzeyinde değerlendirildi. Bulgular: Farklı yöntemlerle elde edilen metal alaşımlarının metal-porselen bağlantısının üç nokta bükme testi ile değerlendirilmesi sonucu elde edilen değerler arasında istatistiksel olarak anlamlı bir fark bulunamamıştır. Selektif lazer sinterleme yöntemiyle elde edilen alaşımların metal-porselen makaslama bağlanma dayanımlarının, geleneksel döküm yöntemiyle hazırlanan alaşımlara göre anlamı derecede daha yüksek olduğu saptanmıştır. Sonuç: Üç nokta bükme testi sonuçlarına göre, grupların metal-porselen bağlanım dayanımları arasında anlamlı bir fark bulunamamıştır ve bu değerler ISO 9693'e göre minimum kabul edilebilir sınırın üzerindedir. Selektif lazer sinterleme yöntemiyle hazırlanan örneklerin metal-porselen makaslama bağlanım dayanımları, geleneksel döküm yöntemiyle hazırlanan alaşımlara göre daha yüksek bulunmuştur.

Anahtar Kelimeler: Dental porselen; metal-seramik alaşımlar; selektif lazer sinterleme
ABSTRACT
 Objective: Metal-supported porcelain restorations are widely used as a treatment options due to it's advantages such as superior mechanical properties. The aim of this study was to evaluate the metal-porcelain bond strengths of Co-Cr alloys obtained by different methods using two different testing methods. Material and Methods: In this study, Co-Cr alloy specimens were prepared using with selective laser sintering (n=20) and conventional casting (n=20) and specimens were divided 4 subgroups (n=10). For the three-point bending test, porcelain layer were applied to samples according to ISO 9693 with a total thickness of 1.1 mm. For shear bond strength test, porcelain layer 4 mm in diameter and 4 mm in thickness was applied to the specimens. The metal-porcelain bond strengths were measured by a universal testing machine using three-p oint-bending test at a speed of 1.5 mm/min with 90° angle and shear bond strength test at a speed of 0.5 mm/min. The data were analyzed using One-way ANOVA analysis and p<0.05 was assessed as significance level. Results: According to the results of three point bending test conducted, there was no statistically significant difference found between metal-porcelain bond strength of specimens that obtained by different methods. The metal-porcelain shear bond strengths of the alloys obtained by selective laser sintering method were found to be higher than specimens prepared by conventional casting method. Conclusion: According to three-point-bending test results, no significant difference was found between metal-porcelain bond strengths of the groups and these values were above the minimum acceptable limit according to ISO 9693. Metal-porcelain shear bond strengths of specimens prepared by selective laser sintering are higher than alloys prepared by conventional casting.

Keywords: Dental porcelain; metal-ceramic alloys; selective laser sintering
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