International Journal of Laser Dentistry

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VOLUME 3 , ISSUE 2 ( 2013 ) > List of Articles


Efficacy of Er,Cr:YSGG Laser with Conical Tip Design in Smear Layer Removal at the Apical Third of Curved Root Canals

Premila Suganthan, M Sabari Murugesan

Citation Information : Suganthan P, Murugesan MS. Efficacy of Er,Cr:YSGG Laser with Conical Tip Design in Smear Layer Removal at the Apical Third of Curved Root Canals. Int J Laser Dent 2013; 3 (2):55-59.

DOI: 10.5005/jp-journals-10022-1038

License: CC BY-NC 4.0

Published Online: 00-08-2013

Copyright Statement:  Copyright © 2013; Jaypee Brothers Medical Publishers (P) Ltd.


This ex vivo study investigates the effectiveness of the new design of the tip of Er,Cr:YSGG laser (BIOLASETM) in removing the smear layer at the apical third of curved root canals. Eighty one freshly extracted intact single rooted human mandibular premolar teeth with 15° to 30° canal curvature were selected and decoronated at the level of the cementoenamel junction. The roots were divided into three main groups with 27 samples each. Group I—non-lased teeth, group II—teeth lased with plain tip and group III—teeth lased with conical tip. Each group was further divided into three subgroups of nine samples each with 2 ml of 17% (Ethylene diamine tetraacetic acid (EDTA), 2 ml of 2% chlorhexidine (CHX), 2 ml of 3% sodium hypochlorite (NaOCl) respectively. In all the three groups, canals were prepared with rotary nickel-titanium (NiTi) instruments to a working length 1 mm short of the apex to size F3, using ProTaper instruments. The fiber tips were placed into the appropriate irrigant solution in the root canal to a depth of 1 mm short of working length and then activated for 20 seconds. The teeth were split longitudinally and subjected to scanning electron microscopy (SEM) at 1000×. It can be concluded that to ensure complete removal of smear layer from the root canal system it may be prudent to activate EDTA with conical tip design of Er,Cr:YSGG laser during irrigation protocol in the curved root canals.

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