Objective:

To analyze the bond strength to healthy and demineralized dentin, immediately and after 6 months, using a 2% chlorhexidine (CHX) pretreatment.

Method

: 40 healthy third molars with incomplete root development were abraded exposing dentin. The pieces were subjected to pH cycling. They were randomly divided into 2 groups: with and without CHX. In dentin, 4 resin buttons were created using universal adhesive in self-etching mode. The samples were stored in distilled water at 37ºC until analysis. Micro shearing was carried out at 24 hours and at 6 months of aging.

Results:

Healthy dentin group, without immediate CHX presented higher bond strength (23.37±1.84). (Demineralized dentin group, without CHX, aged) presented the lowest bond strength (8.87±1.51).

Conclusions

: CHX prior to adhesive application doesn’t improve bond strength values to healthy or demineralized dentin in short nor long term.

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