Part. 2 Root canal chemical preparation part 2. - the smear layer and its role in endodontic treatment

The smear layer - first described in 1975, it is a layer of impurities created after chemo-mechanical treatment of the root canal.

Consists of:

* organic and inorganic material,

* dentine residues,

* odontoblast fiber residues,

* living or dead pulp tissue,

* microorganisms