FARKLI ÖZELLİKTEKİ AKIŞKAN REZİN KOMPOZİTLERİN DİŞ DOKULARINA BAĞLANMA DAYANIMININ İNCELENMESİ

Amaç: Farklı türde akışkan rezin kompozitlerin mine ve dentindeki mikro makaslama bağlanma dayanımını karşılaştırmalı olarak değerlendirmektir. Gereç ve Yöntem: Yüz sekiz çürüksüz insan alt 3. büyük azı dişinde hazırlanan örnekler rastgele 4 ana grupta ikişer alt grup ve 1 adet kontrol grubu olacak şekilde 9 gruba (n=12) ayrıldı : Grup-VF: Kendinden adezivli akışkan rezin kompozit (Vertise Flow); Grup-GUF: Geleneksel akışkan rezin kompozit (G-ænial Universal Flo); Grup-MEF: Yoğun dolduruculu akışkan rezin kompozit (Majesty Es Flow). Grup TEF: Bulk-fill akışkan rezin kompozit (Tetric Evo Flow) ve Grup-KNTRL: Adezivsiz uygulanan kendinden adezivli akışkan rezin kompozit (Vertise Flow). Adeziv sistem olarak Single Bond Universal her grupta iki farklı yöntemle uygulanarak ikişer alt grup hazırlandı : a) Self-Etch uygulama (SE), b) Etch & Rinse (asitle ve yıka) uygulama (ER) Tüm gruplarda adeziv sistemin uygulanmasından sonra, iç çapı 0.90 mm. olan Tygon tüpler kullanılarak kompozit silindirler oluşturuldu . Örneklerin mikro makaslama bağ dayanımları (μSBS) üniversal bir test cihazı kullanılarak belirlendi. Veriler iki yönlü varyans analizi (ANOVA) ve post-Hoc Tukey testi ile analiz edildi (α=0.05). Bulgular: MEF+ER grubunun minedeki μSBS değeri diğer gruplara kıyasla daha yüksek (55.86 MPa/cm2) bulunmuş iken, dentin dokusunda en yüksek μSBS değerine GUF+SE grubunda ulaşıldı (31.97 MPa/cm2) (p<0.05). Tüm gruplarda, mine dokusunda etch and rinse (ER) yöntemiyle uygulanan kompozitlerin bağlanma dayanımı self-etch (SE) yönteme kıyasla yüksek bulundu (p<0.05). VF grubunda mine ve dentin dokusunda hem self-etch hem de asitle ve yıka yöntemiyle uygulandığında en düşük μSBS değerlerini gösterdi. Sonuçlar: Doldurucu oranı artırılmış akışkan rezin kompozitler, bulk-fill ve kendinden adezivli akışkan rezin kompozitlere kıyasla daha iyi bir bağlanma dayanımı sergilemiştir. Kendinden asitli üniversal adeziv sistemin asitle kombine uygulanması akışkan rezin kompozitlerin bağlanma dayanımını olumlu yönde etkilemektedir.

Anahtar Kelimeler:

Kendinden adezivli akışkan kompozit, bulk-fill akışkan kompozit, mikro-makaslama bağ dayanımı, universal adeziv.

EVALUATION OF THE STRENGTH OF BONDING OF DIFFERENT FLUID RESIN COMPOSITES TO DENTAL TISSUE

Aim: To comparatively evaluate the micro-shear bond strength of different types of flowable resin composites in enamel and dentin. Materials and Methods: 108 caries-free third molars were randomly divided into 9 groups (n=12) as 2 subgroups in 4 main groups and 1 control group: Group-VF: Self-adhering flowable resin composite (Vertise Flow); Group-GUF: Conventional flowable resin composite (G-ænial Universal Flo); Group-MEF: Highly filled flowable resin composite (Majesty Es Flow). Group TEF: Bulk-fill flowable resin composite (Tetric Evo Flow) and Group-CNTRL: Self-adhering flowable resin composite (Vertise Flow) applied without any bonding stage. As an adhesive system, Single Bond Universal was applied with two different methods in each group and two subgroups were prepared: a) Self-Etch application (SE), b) Etch & Rinse application (ER). After the adhesive application phase, composite cylinders were builded-up using Tygon tubes (r=0.90 mm). The microshear bond strength (μSBS) of the samples was determined using a universal tester. Data were analyzed with two-way variance (ANOVA) and post-Hoc Tukey test (α=0.05). Results: While the μSBS value of the MEF+ER group in enamel was higher (55.86 MPa/cm2) compared to the other groups, the highest μSBS value in the dentin tissue was found in the GUF+SE group (31.97 MPa/cm2) (p<0.05). In all groups, the bond strength of the composites applied with the etch and rinse (ER) method on the enamel tissue was higher than the self-etch (SE) method (p<0.05). The VF group presented the lowest μSBS values when applied with both SE and ER adhesive application methods. Conclusions: Highly filled flowable resin composite presented better bond strength values than bulk-fill and self-adhering flowable composites. The combined use of self-etch universal adhesive system with an acid application (etching) positively affects the bond strength of flowable resin composites.

Keywords:

Self-adhering flowable composite, bulk-fill flowable composite, micro-shear bond strength, universal adhesive.,

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