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Oral Hygiene Indices

Oral hygiene is a basic factor for oral health. Poor oral hygiene leads to dental plaque-collections, which in turn can cause gingivitis eventually leading to periodontal diseases. That is why many clinical studies have been carried out focusing on the role of oral hygiene in the prevention and control of oral diseases.

Dental plaque is defined as the soft adherent structured deposits, which forms on the tooth surface. It consists of a mixed bacterial flora, sometimes with desquamated epithelial cells and migrated polymorphonuclear leukocytes. It is not and should not be confused with food debris.

A number of plaque indices has been developed for assessing individual levels of plaque control and are also been used in several epidemiological studies. Some of the most well - known indices, which have been used in numerous studies, are listed below.

Oral Hygiene Indices

Oral Hygiene Index (Greene and Vermilion, 1960)
Simplified Oral Hygiene Index | OHI-S
Silness-Löe Index
Quigely Hein Index (modified)
Plaque Control Record 


  • Greene JC, Vermillion JR. The oral hygiene index: a method for classifying oral hygiene status. J Amer Dent Ass 1960; 61: 29-35.
  • Greene JC, Vermillion JR. The simplified oral hygiene index. J Amer Dent Assoc 1964; 68: 7-13.
  • Silness J, Löe H. Periodontal disease in pregnancy. II. Correlation between oral hygiene and periodontal condition. Acta Odontol Scand 1964; 22: 121-135.
  • Turesky S, Gilmore ND, Glickman I. Reduced plaque formation by chloromethyl analogue of victamine C. J Periodontol 1970; 41: 41-43.
  • O' Leary T, Drake R, Naylor. The plaque control record. J Periodontol 1972; 43: 38-39.
Last updated by Marie Nordström