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The damage effect of EGCG on S. mutans cell morphology and biofilm. (A) Untreated control. (B) Treated with 0.2 mg/ml of EGCG for 24 hr. The arrow in Fig. 5B indicates “ring” phenomena around the damaged cells. (C) Untreated control of biofilm on MBECTM-HTP pegs. (D) Biofilm bacteria were treated with 0.2 mg/ml of EGCG for 24 hr.
