Perbandingan Efek Antibakteri Xanthorrhizol (Curcuma xanthorrhiza Roxb.) Dengan Chlorhexidine 2% Terhadap Biofilm Enterococcus faecalis Isolat Klinis = Comparison of Antibacterial Efficacy between Xanthorrhizol (Curcuma xanthorrhiza Roxb.) and Chlorhexidine 2% on Clinical Isolate of Enterococcus faecalis Biofilm