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Publication:
Journal of Oral Laser Applications

Year 2001
Volume 1 , Issue 1

Back
Pages: 43 - 47

Efficacy of an Er:YAG Laser to Remove Endodontic Pastes: An In Vitro Study

Philippe Warembourg/Jean-Paul Rocca/Marie-France Bertrand

The aim of this study was to evaluate the ability of an Er:YAG laser (2940 nm) to eliminate root canal filling materials (ZnO cement and phenoplastic resin). Twenty-four single-rooted canals were conventionally hand prepared, randomly spread into two groups, and filled with a lentulo spiral without gutta-percha to make the retreatment more difficult. Er:YAG laser irradiation was used with water irrigation, in combination with hand instruments, to remove endodontic pastes. The laser was checked at 250 mJ with a pulse duration of 0.025 s and a frequency of 10 Hz. Results showed the working length was reached in 50% of canals, approached to within 2 to 3 mm in 50% of canals (group 1, ZnO pastes) and approached to within 1 to 3 mm in 58% of cases (group 2, phenoplastic resins). In group 2 the laser irradiation was stopped (33%) when the laser beam did not act any more or when the operator felt that a lateral perforation of the root canal was possible. The Er:YAG laser does represent an aid in eliminating endodontic hard materials such as ZnO cements and phenoplastic resins.

 

 
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