Plaque removal efficacy of a compacted dual-head power toothbrush: A split-mouth randomized clinical trial

To evaluate the plaque removal efficacy of a compacted dual-head power toothbrush (DH) in comparison with a single-head power toothbrush (SH).

24 healthy university students were included in this split-mouth and single-center clinical trial. The DH and SH were randomly assigned to brush the left/right half mouth in the first visit. Testing time points were 30 and 60 seconds. Additionally, 15 and 45 seconds were set for the DH period. The overall, buccal, lingual, gingival marginal, and proximal plaque scores at different time points were recorded and determined by Rustogi Modification of the Navy Plaque Index. To avoid the influence of the right handedness, subjects were brushed in the second visit after 4 weeks, and the SH and the DH were assigned to the right/left half mouth in an opposite period to that of the first visit.

21 participants completed this study. Overall plaque score reductions of the SH and DH were 29% and 59% (P< 0.05) at 30 seconds, and the reductions were 47% and 77% respectively (P< 0.05) at 60 seconds. Using the DH for 45 seconds reduced significantly more overall, buccal, lingual, and gingival marginal plaque than that of using SH for 60 seconds (P< 0.05). The SH reduced plaque scores significantly less in the right and lower dentitions than left and upper dentitions respectively, while DH reduced comparable plaque scores between these dentitions. The DH is more effective in removing overall, buccal, lingual, gingival marginal, and proximal plaque in healthy university students than the SH, meanwhile DH showed comparable overall plaque reduction rates between different regions of the dentitions.

This compact dual-head power toothbrush provides a new option to carry out daily plaque control effectively.