Conflict of interest and sources of funding statement
Frequency of mechanical removal of plaque as it relates to gingival inflammation: a randomized clinical trial
Article first published online: 1 AUG 2013
© 2013 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd
Journal of Clinical Periodontology
Volume 40, Issue 10, pages 948–954, October 2013
How to Cite
Frequency of mechanical removal of plaque as it relates to gingival inflammation: a randomized clinical trial. J Clin Periodontol 2013; doi: 10.1111/jcpe.12135., , , , .
The authors declare no conflict of interests related to this study. This study was supported by the Foundation for Post-Graduate Education (CAPES), Brasilia, Brazil.
The clinical trial registration number: NCT 016 308 37.
Name of the trial register: frequency of oral hygiene.
- Issue published online: 2 SEP 2013
- Article first published online: 1 AUG 2013
- Accepted manuscript online: 25 JUN 2013 08:32AM EST
- Manuscript Accepted: 19 JUN 2013
- Post-Graduate Education (CAPES). Grant Number: NCT 016 308 37
- dental plaque;
- periodontal diseases;
This single blind, randomized clinical trial evaluated the relationship between frequency of mechanical removal of plaque (MRP) and gingival inflammation.
Materials & Methods
Fifty-two patients (maximum 5% of sites with gingival bleeding and no history of periodontitis) were randomized to different frequencies of MRP: 12, 24, 48 and 72 h. Plaque index (PlI) and gingival index (GI) were evaluated at baseline, 15 and 30 days. Intra- and inter-group differences were determined by repeated measures anova and mixed models anova, respectively, both followed by Tukey's test.
The mean GI between baseline and 30 days remained statistically unchanged in the 12 h (0.51 ± 0.17 versus 0.63 ± 0.23, p = 0.137) and 24 h (0.43 ± 0.19 versus 0.59 ± 0.21, p = 0.052) groups, but increased significantly in the 48 h (0.48 ± 0.18 versus 0.84 ± 0.21, p = 0.001) and 72 h (0.55 ± 0.20 versus 0.94 ± 0.25, p = 0.000) groups. At 30 days, the average percentage of sites with GI scores of 1 and 2 was significantly higher in the 48 and 72 h than in the 12 and 24 h groups (p < 0.05).
Frequencies of mechanical removal plaque up to 24 h may prevent an increase in the severity of gingival inflammation over a period of 30 days in patients with no history of periodontitis.