GD1 :Remove calculus and bacterial plasue on supragingival, neck of teeth and hard calculus on the teeth point.
GD2 : Remove supragingival heavy calculus.
GD3 : Remove the calculus and bacterial plasue on subgingival interdental calculus.
GD4 : Remove all supragingival calculus and bacterial plasue.
GD5 : Remove supragingival and neck calculus and bacterial plasue.
GD6 : Remove supragingival heavy calculus.