13th World Congress for Laser Dentistry

26-28, April 2012

Barcelona, Spain

Meeting Abstract

Sponsors: World Federation for Laser Dentistry

- Oral Presentation 18

TITLE: Depth and penetrated perimeter of endodontic sealer after using a Nd:YAG laser.

AUTHORS: Montero P, Torres-Lagares D, Sáez I, Pérez BP, Azcarate F, Gútierrez-Pérez JL.

Seville´s University

SOURCE: Med Oral Patol Oral Cir Bucal. 2012 May 1;17(Supplement1):S18.

* doi:10.4317/medoral.17643517

http://dx.doi.org/10.4317/medoral.17643517

Abstract

Objective The aim of this study is to evaluate in Vitro if using the Nd:YAG laser altered the sealer´s penetration in dentinal tubules.

Material and method: Seventeen mandibular single-rooted premolars were instrumented with the rotatory system MTWO and a Nd:YAG laser was used. Canals were obtured with gutta-percha and AH-Plus mixed with rhodamine B isothiocyanate with lateral compactation technique. The sections were done at 3 and 5 mm from the apical foramen. The segments were examined on a confocal microscope, measuring the depth of pene-tration and the perimeter penetrated by the colour. For analysis result, we used the SPSS programm.

Results: The coloring depth was 105,13 microns +/- 78,6 in laser group opposite to the 106,81 microns +/- 87,4 in the control group (p= 0,895). At 3 mm, the penetrated perimeter in laser group was 42,the 86 % +/- 21,4 opposite to 33,39 % +/- 18,9 in the control group (p=0,034), while at 5 mm, the penetrated perimeter in laser group was 58,93 % +/- 22,8  opposite to the 51,74 % +/- 24,4 in the control group (p=0,164).

Conclusion: Improving the perimeter permeable, the laser action is effective at 3 mm but not at 5 mm. Regarding to the depth of penetration, this is constant independently to the use of laser, as at 3 mm as at 5 mm.