Methods: 48 patients participated in this study according to inclusion criteria. Patients were randomly assigned into 2 groups: Group 1 (Control): 22, no liner applied, Group 2: 26, MTA. After evaluating responses of each tooth to cold, percussion, and pressure, a cavity was prepared and caries were excavated completely from the periphery of the cavity, except the pulpal floor or the axial wall. The liner was applied according to manufacturing instructions. Restoration of the cavity was done with EQUIA System (Posterior Glass Ionomer, GC Co., USA). The cavity was conditioned with polyacrylic acid, restored with a capsule of posterior glass ionomer and coated with a special nano-hydrophobic light-cured resin (G Coat, GC Co., USA). Clinical and radiographical evaluations were done on certain periods up to 12 months.
Results: The results of this study revealed that there was a significant difference between two groups regarding the symptoms (P>0.05). Three cases in Group 1 resulted in irreversible pulpitis after SE, which needed RCT while eight cases experienced sensitivity to cold during clinical examinations (P<0.05). Only one patient in Group 2 experienced sensitivity to cold (P<0.05).
Conclusions: MTA can be used as a lining material over the remaining caries in SE technique without re-entry. However, longer evaluation time is suggested.
This study was funded by Endodontics Research Center of SBUM.