Comparison of the Push-out Bond Strength of MTA and a Bio-ceramic Repair Material at the Furcal Area after Final Irrigation with 17% Ethylenediaminetetraacetic Acid (EDTA), and 20% Citric Acid

Abstract

Background: Perforations are serious endodontic complications that require immediate repair for a successful treatment outcome. The materials used for the repair, along with the irrigants employed, play a significant role in determining the bond strength at the dentin interface. The choice of material is therefore critical for the long-term durability of the treatment.
Aim: To compare the push-out bond strength of MTA and a bioceramic repair material in furcation of mandibular molars after final irrigation with 17% Ethylenediaminetetraacetic Acid (EDTA), 20% citric acid.
Materials and methods: Forty extracted mandibular molars with standardized furcation perforations were divided into two material groups: MTA and Bio C Repair (n=20 each). Both groups were further subdivided by final irrigation: 17% EDTA and 20% citric acid (n = 10 per subgroup). After obturation and perforation repair, samples were stored for 24 hours at 100% humidity and 37°C to allow the material to set. Push-out bond strength (MPa) was measured using a universal testing machine. Data were analyzed using the Kruskal-Wallis test and Dunn’s multiple comparison test with Bonferroni correction.
Results: Bio C repair irrigated with 20% citric acid exhibited significantly higher push-out bond strength than all other subgroups. Overall, Bio C Repair showed greater push-out bond strength than MTA (P<0.05).
Conclusion: The newer putty consistency material showed better bond strength compared to conventional MTA, and its mechanical properties were significantly influenced by the type of irrigant used during bio-mechanical preparation.