Dentistry

Gingival Index (GI) & Plaque Index (PI) of Löe & Silness

Quantifies clinical gingival inflammation severity and cervical biofilm accumulation.

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Gingival Index: Maxillary Right 1st Molar (#3)*

Gingival Index: Maxillary Right Central Incisor (#8)*

Gingival Index: Maxillary Left 1st Premolar (#12)*

Gingival Index: Mandibular Left 1st Molar (#19)*

Gingival Index: Mandibular Left Central Incisor (#24)*

Gingival Index: Mandibular Right 1st Premolar (#28)*

Plaque Index: Maxillary Right 1st Molar (#3)*

Plaque Index: Maxillary Right Central Incisor (#8)*

Plaque Index: Maxillary Left 1st Premolar (#12)*

Plaque Index: Mandibular Left 1st Molar (#19)*

Plaque Index: Mandibular Left Central Incisor (#24)*

Plaque Index: Mandibular Right 1st Premolar (#28)*

Formula

Mean GI = Sum of Gingival Scores / Number of Teeth Evaluated
Mean PI = Sum of Plaque Scores / Number of Teeth Evaluated

The global benchmark scoring indices for evaluating reversible gingival inflammation and patient plaque control effectiveness.

Evaluates soft tissue inflammation and superficial plaque; does not measure irreversible periodontal attachment loss or alveolar bone level.