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Publication:
Journal of Oral Laser Applications

Year 2002
Volume 2 , Issue 2

Back
Pages: 101 - 105

Er:YAG Laser as an Aid in Filling Root Canals in Three Dimensions

Jean-Paul Rocca/Marie-France Bertrand/Manlio Curti

Purpose: Vertical condensation of warm gutta-percha is an effective methodology to fill root canals in three dimensions. However, this technique is used by very few dental practitioners and the main argumentation advanced is that, in all regards, this method is time consuming. The use of an Er:YAG laser (2940 nm) to heat gutta-percha to be vertically condensed in the root canal space was studied. Materials and Methods: Twenty freshly extracted single-rooted teeth were used in this in vitro study. Root canals were conventionally prepared (step-back technique) with NaOCl 2.5% as irrigant, plus a final irrgation with citric acid 5%. The apical portion of each root canal was prepared down to a #30 K file. The first group (10 teeth) was filled using the same technique as described by Schilder. The second group (10 teeth) was filled using an Er:YAG fiber optic (300 µm, manufacturer’s output parameters: 350 mJ, 4 Hz) to heat the gutta-percha, which was then vertically condensed. A mean range of 109 pulses/s was needed for each sample (fluence: 495 J/cm2, power density, 1981 W/cm2). Radiographs were taken for each specimen to control the validity of the root canal filling. Time consumed for each specimen was recorded and compared using a nonparametric statistical approach (Mann-Whitney U test). Results: It was shown that the use of an Er:YAG fiber optic did not affect the quality of root canal fillings. Time consumption was significantly lower (p < 0.001) as compared with the conventional warm vertically condensed gutta-percha technique. Conclusion: This method provides procedural simplification. Further studies are needed to determine and compare the effects of different output laser parameters.

 

 
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