The Efficacy of Immediate Dentin Sealing Techniques on Marginal Micro Leakage of Composite Resin Inlays

Aim: To evaluate the influence of two immediate dentin sealing (IDS) techniques on the marginal microleakage of composite inlays.
Methodology: Thirty human third molars received MOD preparations, with the mesial proximal box extending above and the distal box extending below the cemento-enamel junction. The teeth were randomly divided into groups (n=10): G1 – control, without IDS; G2 – IDS with Clearfil SE Bond; G3 - IDS with Clearfil SE Bond and Protect Liner F. Impressions of the preparations were made, followed by provisional restoration. ED Primer A and B were applied to the preparation followed by Panavia F for the luting procedure of the composite inlays. The samples were thermocycled 2500x between 5°C and 55°C, then placed in a 0.5% methylene blue dye solution for 24 hours. The samples were sectioned in the mesio-distal direction and evaluated for microleakage at the mesial and distal margins under a stereo microscope at 20x magnification. The dye penetration was scored as 0 (no penetration), 1 (penetration to half of the gingival wall), 2 (penetration along the gingival wall), 3 (penetration extending into the axial wall).
Results: According to Kruskal-Wallis analysis (α=.05), there were no significant differences in the dye penetration between the groups in either the enamel (P=.07) or the dentin (P =.31). According to Wilcoxon, the dye penetration in the dentin was higher than in the enamel (P =.03) for group 3.
Conclusion: The IDS with Clearfil SE Bond, either associated or not associated with Protect Liner F, was not capable of producing complete sealing of the enamel and dentin margins.