Comparative evaluation of microleakage in Class V cavities using various glass ionomer cements: An in vitro study

Aim: The study aimed to evaluate the microleakage of nano-filled resin-modified glass ionomer restorative (nano-filled RMGI) in comparison with that of conventional glass ionomer cement (CGIC), and resin-modified glass ionomer cement (RMGIC). Materials and Methods: Forty-five standardized Class V cavity preparations were prepared on sound extracted human molar teeth. Teeth were randomly assigned to three experimental groups of 15 teeth each and restored as follows: Group 1, CGIC; Group 2, RMGIC; and Group 3, nano-filled RMGI. The specimens were placed in a solution of 2% Rhodamine-B dye for 24 h at room temperature under vacuum. Staining along the tooth restoration interface was recorded. Results were analyzed using Kruskal-Wallis and Wilcoxon tests. Results: There were no statistically significant differences in dye leakage between all the three restorative materials for occlusal margins (P = 0.464). Group 3 showed significantly less microleakage compared to Group 1 (P = 0.007) and Group 2 (P = 0.040) at the gingival margins. The degree of microleakage in the gingival margins of each group was more than that found in occlusal margins. Conclusions: No material was able to completely eliminate microleakage at enamel, dentin, or cementum margin. Nano-filled RMGI showed least microleakage compared to other two cements at gingival margins.Clinical Relevance to Interdisciplinary DentistryCervical lesions have been a restorative challenge for dentists for many years.An interdisciplinary treatment approach is the appropriate choice in cases where there is gingival recession and cervical lesions.Glass ionomer cements have been commonly used for restoration of cervical lesions.Nano-filled resin-modified glass ionomer cement can be used for the restoration of cervical lesions, as it has a better marginal sealing ability compared to conventional glass ionomer and resin-modified glass ionomer cements.