ÜNİVERSAL ADEZİVLERİN FARKLI BİYOAKTİF MATERYAL VE DENTİN KOMPLEKSİNE BAĞLANMA DAYANIKLILIĞINA ETKİSİ

Abstract

The aim of this in vitro study study is to examine the effect of different universal adhesive systems (Single Bond Universal Adhesive, 3M and Prime&Bond Universal, Dentsply) on bond strength of four different bioactive materials frequently used as pulp coating or base material under composite restorations in restorative dentistry; calcium silicate filled resin-containing liner (TheraCal LC), resin-modified glass ionomer cement (Riva LC), glass ionomer cement (Riva SC) and mineral trioxide aggregate (BioMTA+) and dentin complex to composite restorations. Extracted human molar teeth were separated from their roots and placed in acrylic blocks for shear bond strength analysis. Samples with exposed dentin tissue on their buccal surfaces were randomly divided into 8 groups (G1: Theracal LC + Single Bond (SB) (T-SB), G2: Riva LC + SB (RLC-SB), G3: Riva SC + SB (RSC-SB), G4: BioMTA+ + SB (M-SB), G5: Theracal LC + Prime&Bond (PB) (T-PB), G6: Riva LC + PB (RLC-PB), G7: Riva SC 4 PB (RSC-PB), G8: BioMTA+ + PB (M-PB)) (n=10). Preparations with 1 mm diameter and 1 mm depth were made in the dentin tissue under water cooling using 1 mm diameter fissure burs and the preparations in all 80 samples were filled with 4 different biomaterials in equal numbers (n=20). 37% orthophosphoric acid was applied for 15 seconds the dentin and biomaterial complex and washed with water and dried. Single Bond Universal Adhesive (3M) was applied to half of the prepared samples, the other half was treated with Prime&Bond Universal (Dentsply) adhesive system and 2 mm high and 2 mm diameter composite blocks were bonded to the biomaterial dentin complex. Once the preparation phase was completed, samples were kept in distilled water at 37°C for 48 hours. The samples were exposed to 10,000 thermal cycles at 37°C, 5°C ve 55°C. Following these procedures, load was applied to all samples in the universal test device with a head speed of 0.5 mm/min until failure occurred. Fractured samples were examined for the analysis of fracture types with the aid of a x10 magnification stereomicroscope. Obtained data were analyzed with T-test and two-way ANOVA tests. As a result of the evaluation of shear bond strength data, Theracal LC showed the highest bond strength (p<0.05). The material with the lowest bond strength was determined as MTA (p<0.05). Bond strength values for all tested materials can be listed as Theracal LC> Riva LC> Riva SC> BioMTA+. When the effects of two different universal adhesives on bond strength was compared, no statistically significant difference was found (p>0.05). According to the results of the fracture type analysis, adhesive failure for Theracal LC and Riva LC and cohesive failure for BioMTA+ was the most common type of fracture.