Comparison of the sealing ability of different types of glass ionomer cements in temporary restoration

Resumo

Glass ionomer cement has been used for temporary
restoration; however, several formulations are available. Objective:
The aim of this study was compare the linear leakage of different
types of glass ionomer cement – R, F, N and C. Material and
methods: Forty-four third molars were used and prepared with
standardized class I cavity preparations. By using gutta-percha,
the cavity height was standardized in 5 mm. The samples were
divided into 4 experimental groups (R, N, F and C), and 2 control
groups (positive – not restored, and negative – restored using resin).
The teeth were waterproofed and immersed in 2% methylene blue.
After 7 days, they were sectioned and the measurement of the dye
leakage was performed by stereomicroscopy (40X) using a calibrated
periodontal probe. Results: Data were analysed by Kruskal Wallis
and Dunn tests. There was statistically significant differences
(p = 0.002) between R and C, and R and N glass ionomer groups.
C and N glass ionomer groups were similar. F glass ionomer group
was similar to all other groups. Conclusion: It can be concluded
that different types of glass ionomer formulations can influence the
peripheral sealing of the restorative material. R glass ionomer was the
most effective, while C and N glass ionomers were the least ones.