Resumo: O objetivo deste trabalho foi avaliar o efeito do LED violeta (LED) e plasma de argônio (NATP), associados ou não ao peróxido de hidrogênio 35% (HP) e carbamida 37% (CP), no clareamento dental de consultório. No primeiro estudo, 90 coroas bovinas, pigmentadas com chá preto, foram submetidas aos tratamentos (n=10): LED, LED/HP, LED/CP, NATP, NATP/PH, NATP/CP, HP, CP e controle (C). LED foi irradiado vinte vezes por 1min com intervalos consecutivos de 30s (10 sessões) e NTAP foi aplicado por 10min (6 sessões). HP e CP foram aplicados por 30min (3 sessões). Quando associados a HP e CP, LED foi irradiado durante toda aplicação dos géis e NTAP foi aplicado nos 10min finais. Os espécimes foram mantidos em saliva artificial entre sessões e C permaneceu em saliva...
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Abstract: The objective of this study was to evaluate the effect of LED and NATP associated or not with 35% hydrogen peroxide (HP) and 37% carbamide peroxide (CP). Firstly, 90 incisor bovine crowns stained with black tea were submitted to the following treatments (n=10): LED, LED/HP, LED/CP, NATP, NATP/PH, NATP /CP, HP, CP and C - control. LED was irradiated twenty times for 1 min with consecutive 1-min intervals (10 sessions) and NTAP was applied for 10 minutes (6 sessions). HP and CP were applied for 30 min (3 sessions). When associated to HP and CP, LED was irradiated during all gel application and NTAP for the last 10 minutes of gel exposure. Specimens were maintained in artificial saliva (AS) among intervals and C was stored in AS throughout the experiment. L*a*b* values were obtained by means of spectrophotometry after staning (T0), last bleaching session (Tb) and 14 days...
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