Dark-field microscopy and patient education.
D001419:Bacteria / Q000302:isolation & purification; D003773:Dental Plaque / Q000382:microbiology* / Q000517:prevention & control; D005891:Gingivitis / Q000382:microbiology / Q000517:prevention & control; D006801:Humans; D008858:Microscopy, Phase-Contrast; D009910:Oral Hygiene; D010353:Patient Education as Topic