Source of Support: None, Conflict of Interest: None
The smear layer is an entity that has been widely studied and a plethora of articles have been published from time to time to have a better understanding of the subject. It has been an issue of intrigue and contemplation ever since its presence was first reported in 1975. Like the two sides of a coin, it has its advantages and disadvantages. This paper is an attempt to have a broad picture of the endodontic smear layer by highlighting its contribution to the outcome of an endodontic treatment, depending upon whether it is retained or removed from the root canal. Thought its removal is becoming equivocal, newer trends aimed at modifying its structure, so that its beneficial effect can be utilized are being popularized.