Plaque Index:

• 0 = No plaque

  
  

  1 = Thin film along gingival margin covering < 1/3 of buccal tooth surface

  
  

  2 = Moderate accumulation of plaque covering 1/3 to 2/3 of buccal tooth surface

  
  

  3 = Abundant soft plaque covering > 2/3 buccal tooth surface