An evaluation of the efficacy of a curved bristle and conventional toothbrush. A comparative clinical study

J Periodontol. 2000 May;71(5):785-9. doi: 10.1902/jop.2000.71.5.785.


Background: The aim of this study was to determine the plaque-removing ability of a curved bristle toothbrush compared to a conventional, straight bristle, manual toothbrush.

Methods: The study group consisted of 100 volunteers 16 to 24 years of age from a professional engineering college. A four-week post-prophylaxis, parallel, longitudinal, double-blind clinical study was conducted; all volunteers were instructed in specific oral hygiene techniques. Plaque was assessed at baseline and at the end of 1, 2, 3, and 4 weeks using the Quigley-Hein plaque index after disclosing with erythrosin red. Gingival status was assessed at baseline and at the end of 1, 2, 3 and 4 weeks by using the gingival index of Löe and Silness.

Results: Comparative assessment showed a mean of 2.11 +/- 0.086 mm for group 1 and 2.37 +/- 0.216 mm for group 2, indicating a significant difference between the plaque-removing efficacy of the curved bristle and straight bristle toothbrush.

Conclusions: The curved bristle toothbrush was significantly more effective in removing plaque overall than the conventional toothbrush.

Publication types

  • Clinical Trial
  • Randomized Controlled Trial

MeSH terms

  • Adolescent
  • Adult
  • Dental Plaque / prevention & control*
  • Double-Blind Method
  • Equipment Design
  • Humans
  • Periodontal Index
  • Toothbrushing / instrumentation*
  • Treatment Outcome