Examining the correlation between the “O'Leary” and “Ainamo and Bay” indices

The present study is designed to determine whether a correlation exists between the O'Leary Plaque Index and the Ainamo and Bay Gingival Index.The two indices are among the most commonly used in the daily clinical practice of periodontists.Plaque indices find their application in establishing whether periodontal disease is plaque induced or not.They are also applied to give the dentist an initial insight into the patient's level of personal oral hygiene and are very often used as patients' motivation to maintain better plaque control.Gingival indices are used in practice to determine whether gingival inflammation is present and therefore to determine the extent of its prevalence.The study included 30 patients who needed periodontal treatment.The O'Leary and Ainamo and Bay indices were recorded in two stages.The first was immediately prior to treatment initiation and the second was at the reassessment stage after the Hygiene Phase (6-8 weeks).The results demonstrated a significant improvement in the performance of both indices ("O'Leary" showed a difference on average of 82.50% to 16.00%, while "Ainamo and Bay" from 75.80% to 11.60%).The close correlation available between the two indices is noticeable.In conclusion, patient motivation and education during the Hygiene Phase are of utmost importance, as improved personal oral hygiene of the patient inevitably affects the Plaque Index scores, which also reflect on the Gingival Index scores, closely related to periodontal health.