Smear Layer and its removal

The majority of studies analyzed in this meta analysis show support for the removal of smear layer as opposed to preserving it.

As shown by the authors, MTAD may be effective as a final rinse to remove smear layer and reduce erosion of the dentin. However, MTAD by itself is not effective at removing organic debris.

EDTA is most effective in terms of removing the smear layer
Nothing can remove the smear layer and debris completely