Adhesion of resin composite to calcium silicate-based bioceramic sealer contaminated dentin after using different cleaning protocols.

PURPOSE: To evaluate the microtensile bond strength (µTBS) of adhesive resins after cleaning the calcium silicate-based root canal sealer (CSBS) removed from the dentin with different solvents and cleaners.

METHODS

70 human molar teeth were randomly divided into seven main groups. All surfaces were rinsed with 2% NaOCl and 17% EDTA and contaminated with CSBS. Solvents or cleaners used were as follows: no sealer, no solvent, chloroform, ethanol, Endosolv E, phosphoric acid, and hydrofluoric acid. All groups were divided into Subgroup U (universal adhesive) and Subgroup S (two-step self-etching adhesive). Composite build-ups were made with a nanocomposite. Dentin-composite sticks were obtained from each tooth (n=11). µTBS testing was performed, and stereomicroscopic and scanning electron microscopic (SEM) analyses were performed.

RESULTS

The µTBS values of Endosolv E were statistically the highest among the groups (P< 0.05). When comparing the adhesive systems, the µTBS values of the self-etching adhesive groups were significantly higher in no sealer and ethanol groups. Endosolv E produced a better adhesive-dentin bond than the other groups. The self-etching adhesive showed a better bond regardless of the solvent used. Endosolv E and self-etch adhesive may be suitable for adhesive procedures after endodontic treatment with CSBS.

CLINICAL SIGNIFICANCE: Endosolv E, in conjunction with a self-etching adhesive, may prove an efficacious method for cleaning residual sealer and adhesive procedures following endodontic treatment with CSBC.