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<p>To smear or not to smear: controversy surrounding the removal of the smear layer in endodontics<br>Lieutenant Nathan J. Wonder, DC, USN and Captain Patricia A. Tordik, DC, USN<br><br>What is the smear layer?<br>The smear layer was first described by Boyde in 1963 as a layer of debris that covers a calcified tissue when it is cut with a dental hand instrument or rotary bur. The smear layer’s composition mirrors the composition of the instrumented surface. Deep dentin smear layer consists of odontoblastic processes, enzymes, lamina limitans, organic and inorganic dentin matrix and pre-dentin. The debris layer is approximately 1-2 μm thick with smear plugs being created as this microscopic cutting debris is forced into dentinal tubules.
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<br>Subjects: Dental Instruments; Dentin; Endodontics ; Odontoblasts ; Smear Layer</div>
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U.S. Navy. Naval Postgraduate Dental School</div>
<dl><dd><a rel="nofollow" class="external free" href="https://archive.org/details/2009006ToSmearOrNotToSmearControversySurroundingTheRemovalOfTheSmearLayerInEndodontics">https://archive.org/details/2009006ToSmearOrNotToSmearControversySurroundingTheRemovalOfTheSmearLayerInEndodontics</a></dd>
<dd><a rel="nofollow" class="external free" href="https://archive.org/download/2009006ToSmearOrNotToSmearControversySurroundingTheRemovalOfTheSmearLayerInEndodontics/2009_-_006%20To%20smear%20or%20not%20to%20smear%20-%20controversy%20surrounding%20%20the%20removal%20of%20the%20smear%20layer%20in%20endodontics.pdf">https://archive.org/download/2009006ToSmearOrNotToSmearControversySurroundingTheRemovalOfTheSmearLayerInEndodontics/2009_-_006%20To%20smear%20or%20not%20to%20smear%20-%20controversy%20surrounding%20%20the%20removal%20of%20the%20smear%20layer%20in%20endodontics.pdf</a></dd></dl>