13th World Congress for Laser Dentistry

26-28, April 2012

Barcelona, Spain

Meeting Abstract

Sponsors: World Federation for Laser Dentistry

-  Poster 44

TITLE: Histopathalogic evaluation of the effect of InGaAlP and GaAs laser therapy on pulpal tissue and dentinal bridge formation fallowing direct pulp cap of dogs teeth.

AUTHORS: Bidar M, Mooshekhian S, Attaran-Mashhadi NE, Attaran-Mashhadi NI.

Dental Research Center of Mashhad University of Medical Sciences, Iran

SOURCE: Med Oral Patol Oral Cir Bucal. 2012 May 1;17(Supplement1):S192.

* doi:10.4317/medoral.17643692

http://dx.doi.org/10.4317/medoral.17643692

Abstract

Introduction: Dental pulp is a complex tissue and critical for long survival of the tooth and because of this important role vital pulp therapy techniquse has been introduced to save the remained healthy pulp tissue.

Purpose: The aaim of this study is to determine the histopathalogic effect of radiating two kinds of low power laser on the pulp tissue and dentinal barrier formed in pulp capped teeth of the dogs.

Materials and methods: Eighty premolar teeth of seven healthy matured dogs with mean age two years were divided randomly in five groups that contained 16 teeth in each. group 1 was pulp capped with MTA. In group 2 before capping with MTA the exposure site was radiated to a low power laser with 632 nm wave length. In group 3 before capping with MTA the exposure site was radiated to a low power laser with 890 nm wave length. In group 4 before capping with gold foil the exposure site was radiated to a low power laser with 632 nm wave length. In group 5 capping with gold foil the exposure site was radiated to a low power laser with 890 nm wave length.

Results: There was significant differences pulpal and dentin bridge caractristics between groups1, 2, 3 with groups 4 and 5.Cohesivenss and morphology of dentinal barrier were better in first three groups.

Conclusion: Based on the result of this study the effect of pulp cap material is much more important than the effect of low level laser radiation to the exposed area in forming a dentin bridge.