Ação do laser de Nd:YAG intracanal sobre endotoxinas na dentina radicular / Root canal Nd:YAG laser action on endotoxins in the radicular dentin

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

The endotoxins are responsible for important systemic and local reactions that could compromise the endodontic success. The calcium hydroxide even with limitations is the only effective option among the irrigant solutions and intracanal medications on the endotoxin reduction in the dentinal tubules. This experiment evaluated the Nd:YAG laser efficacy regarding the inoculated endotoxin in the root canal with two cinematic irradiation procedures. The irradiation was accomplished using an oscillatory and helicoidal technique after an incubation period where the passage of the inoculated endotoxin inside the root canal through dentin and cement was confirmed. Following this the analysis and comparison among the groups was performed. The Nd:YAG laser (?=1064 nm) irradiation, used parameters were: 100mJ, 15 Hz, 1,5 W, core fiber diameter of 320 ?m, pulse fluency of 124 J/cm2, pulse width of 120 ?s and relaxation time interval of 30 s. The data were statistically compared by ANOVA complemented by the Tukeys test (p<=0,005). The endotoxin concentration at the irradiated samples, regardless the techniques applied were similar. Moreover these concentrations were also similar to those of negative controls and significantly smaller than those of positive controls that were not irratiated (p=0,0271). The Nd:YAG laser irradiation under this experiment conditions was effective on the root canal endotoxin inactivation.

ASSUNTO(S)

laser de nd:yag dentin dentina endotoxina nd:yag laser endotoxin

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