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The aim of this study was to compare the effect of root biomodification by lasers, citric acid and antimicrobial photodynamic therapy (aPDT) on viability and proliferation of human gingival fibroblasts (FGH).Groups were divided in control (CC – only cells), and root fragments treated by: scaling and root planing (positice control – SC), Er:YAG (ER–60mJ,10pps,10Hz,10s,2940nm), Nd:YAG (ND–0.5W,15Hz,10s,1640nm),...
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