Premium
Two‐dimensional changes and surface characteristics from an erbium laser used for root canal preparation
Author(s) -
Roper M.J.,
White J.M.,
Goodis H.E.,
Gekelman D.
Publication year - 2010
Publication title -
lasers in surgery and medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.888
H-Index - 112
eISSN - 1096-9101
pISSN - 0196-8092
DOI - 10.1002/lsm.20918
Subject(s) - er:yag laser , root canal , dentin , dentistry , laser , coronal plane , crown (dentistry) , erbium , smear layer , materials science , ablation , laser ablation , orthodontics , medicine , optics , anatomy , physics
Abstract Background and Objective Erbium lasers have been advocated for use in root canal because of their ability to ablate dentin and remove biologic debris in the root canal space. This study evaluated the ability of an Er:YAG laser to remove dentin predictably in the root canal system and its cleaning ability. Study Design/Materials and Methods Twenty‐eight single‐rooted extracted teeth were assigned into two groups. The first group was cleaned and shaped using crown‐down technique with GT rotary files (control). The second group used an Er:YAG laser with ceramic tip, above the dentin ablation threshold for root canal shaping. A separate group of three teeth was evaluated for cleanliness using an Er:YAG laser with spiral tips. Amount of dentin removed in the buccal–lingual and mesial–distal directions was measured, the data analyzed by ANOVA. Surface characteristics were qualitatively examined. Results The control group produced cleaner, better shaped root canals, faster than the Er:YAG group. The Er:YAG group removed more dentin in the coronal portion but less in the middle and apical thirds. The Er:YAG with spiral tip group left a dense smear layer in the middle and apical thirds. The Er:YAG group was subject to procedural errors more often than the control group. Conclusion The Erbium laser studied was equivalent to rotary files in the coronal and middle thirds but not in the apical thirds of the root canal system. Lasers Surg. Med. 42:379–383, 2010. © 2010 Wiley–Liss, Inc.