Radiopacity and Microleakage Evaluation of Different Intermediate Materials

Year 2024, Volume: 34 Issue: 3, 185 - 191, 28.07.2024

Başak Yazkan Gözde Açikgöz

https://doi.org/10.17567/currresdentsci.1520420

Abstract

Objective: The aim of this study is to compare the radiopacities of different types of materials with indications for application as a base under restorations and the microleakage of the final restorations with these materials applied as bases.
Methods: Standart Class I cavities were prepared in 90 caries-free molar teeth. The cavities were randomly divided into 9 groups according to the type of intermediate material to be applied (n=10): 1. High flowable composite, 2. Low flowable composite, 3. Fiber reinforced composite, 4. Giomer, 5. Ormocer, 6. Alkasite, 7. Bioactive composite, 8. High viscosity glass ionomer, 9. Glass carbomer. The base materials in each group were applied to the cavity floor and restoration was completed using a nanohybrid composite resin and an universal adhesive system. To evaluate radiopacity, radiographic images were taken using direct digital system and mean gray values were measured with ImageJ software. To analyse microleakage, specimens were subjected to thermocycling, immersed in 2% methylene blue solution for 24 hours, sectioned buccolingually and leakage values observed on the half-piece surfaces were examined under a stereomicroscope and recorded. Data were analysed using One-way Analysis of Variance, Tukey HSD Test and Pearson Chi-Square with Bonferroni-corrected Z Test (p˂0.05).
Results: In terms of radiopacity, while alkasite and low flowable composite showed the highest radiopacity, glass carbomer gave the lowest (p<0.001). In terms of microleakage, High flowable composite, low flowable composite, ormocer, giomer and fiber reinforced composite showed similar (p<0.001) and lowest microleakage values, while glass carbomer exhibited the highest microleakage value (p<0.001).
Conclusions: Within the results of the present study, high flowable composite, giomer, ormocer and fiber-reinforced composite can be recommended to be applied under composite resins, since they give successful results in terms of microleakage and present radiographically sufficient radiopacity.

Keywords

Microleakage, Radiopacity, Intermediate materials, Bases

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