Microleakage of Glass Ionomer based Restorative Materials in Primary Teeth: An<i> In vitro</i> Study

Abstract

Aim: Using AutoCAD, we examined the microleakage of dye at the edges of primary‑teeth restorations using three glass ionomer‑based restorative materials. Materials and Methods: A total of 30 extracted noncarious primary molars were used. Class V cavities were adjusted on the buccal surfaces. The teeth were randomly divided into three groups of 10 teeth each as follows: Group A (Ketac Molar), Group B (Photac Fil), and Group C (Dyract XP). All specimens were stored for 24 h at 37°C in distilled water. The teeth were thermocycled 1000 times between 5°C ± 2°C and 55°C ± 2°C before immersion in 0.5% basic fuchsin for 24 h. Two mesiodistal cuts of each tooth were photographed under a stereomicroscope equipped with a digital camera. The dye‑infiltrated surface area was measured. Statistical evaluations were performed by the Kolmogorov–Smirnov test, Levene test, one‑way analysis of variance, and Tukey’s honestly significant difference test. Results: The mean microleakage ratio differed significantly among the groups (P < 0.05). Group C exhibited a significantly smaller area (P < 0.001) than the other groups. Group A had a nonsignificantly higher mean microleakage value than Group B (P > 0.05). Conclusions: Polyacid‑modified composite resin may be a useful restorative material in primary teeth in terms of minimizing microleakage.

Keywords: Glass ionomer‑based restorative materials, microleakage, primary teeth