Clinical Oral Investigations

, Volume 22, Issue 7, pp 2593–2597 | Cite as

Correlation between plaque control and gingival health using short and extended oral hygiene intervals

  • S. C. De David
  • T. G. Mário
  • G. C. De Freitas
  • K. Z. Kantorski
  • U. M. E. Wikesjö
  • Carlos Heitor Cunha MoreiraEmail author
Original Article



To evaluate the correlation between dental plaque formation and gingival health in subjects performing high oral hygiene standards over short or extended intervals.

Materials and methods

Fifty-two non-dental students volunteered for this study. The subjects, trained to perform high oral hygiene standards, were randomized to perform oral hygiene at 12-, 24-, 48-, or 72-h interval over 30 days. The plaque index (PlI) and the gingival index (GI) were evaluated at baseline, 15, and 30 days. For the statistical analysis, oral hygiene intervals were collapsed into daily (12 and 24 h; G12/24) and extended (48 and 72 h; G48/72) intervals. Summary statistics (mean ± SD) and Spearman correlations between the PlI and the GI at baseline, 15, and 30 days were estimated.


At baseline, correlation coefficients between PlI and GI were positive for both groups (r = 0.29 and r = 0.25). At day 15 and 30, correlation was maintained with similar baseline values for the G48/72 group. GI levels did not increase despite an increase in PlI for the G12/24 group, and the correlation was lower than that observed at baseline (r = 0.13 vs. r = 0.29).


In subjects with high oral hygiene standards, the oral hygiene frequency governs the correlation between dental plaque formation and gingival health. Subjects performing high oral hygiene standards at daily intervals will maintain gingival health in difference to subjects using extended hygiene intervals.

Clinical relevance

Subjects performing high oral hygiene standards at daily intervals will maintain gingival health in difference to subjects using extended hygiene intervals.


Dental plaque Periodontal diseases Gingivitis Oral hygiene, tooth brushing 



The authors would like to thank Alessandra Pascotini Grellmann, MSc, and Danilo Antônio Milbrat Dutra, MSc, for collaborating in data collection.

Compliance with ethical standards

Conflict of interest

The authors declare they have no conflict of interest.

Ethical approval

This study was performed in accordance with the Declaration of Helsinki and was approved by the Ethics Committee in Research of Federal University of Santa Maria. (CAAE: 0186.0.243.00-10).

Informed consent

After an explanation of the purpose of study and any questions answered by one of the investigators, subjects agreeing to participate in this study signed an informed consent.


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • S. C. De David
    • 1
  • T. G. Mário
    • 1
  • G. C. De Freitas
    • 1
  • K. Z. Kantorski
    • 1
  • U. M. E. Wikesjö
    • 2
  • Carlos Heitor Cunha Moreira
    • 1
    Email author
  1. 1.Division of Periodontology, Department of Stomatology, School of DentistryFederal University of Santa MariaSanta MariaBrazil
  2. 2.Laboratory for Applied Periodontal & Craniofacial Regeneration, Dental College of GeorgiaAugusta UniversityAugustaUSA

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