若年層における新しい音波式電動歯ブラシと手動歯ブラシの有効性。無作為クロスオーバー臨床試験

Efficacy of a new sonic powered toothbrush versus a manual toothbrush in a young population. A randomized cross-over clinical trial.

抄録

目的:

新しい音波歯ブラシと手動歯ブラシの歯垢除去効果を比較すること。

OBJECTIVE: To compare the effectiveness of dental plaque removal between a new sonic toothbrush and a manual toothbrush.

方法:

この無作為二重盲検クロスオーバー臨床試験には、合計75人の健康な歯科学生が参加した。被験者は無作為に2群（手動歯ブラシまたは音波歯ブラシ）に割り付けられ、1回の歯磨き実習を受けた。7日後、患者はもう一方の歯ブラシで同じ手順を繰り返すよう求められた。歯垢スコアはブラッシングの前後に記録された。

METHODS: In total, 75 healthy dental students participated in this randomized double-blind crossover clinical trial. Subjects were randomly assigned to one of the two groups (manual or sonic toothbrush) and underwent a single toothbrushing exercise. Seven days after, patients were asked to repeat the same procedure with the other toothbrush. Plaque scores were recorded before and after brushing.

結果:

両タイプの歯ブラシを使用した結果、口全体のプラーク指数が有意に減少した：手動歯ブラシでは46.2%±0.28%（p=0.000）、音波歯ブラシでは50.5%±0.24%（p=0.000）であった。しかし、2種類のブラシ間に統計学的有意差は認められなかった（p=0.277）。異なる歯面における歯垢の減少に関しては、頬側の部位でのみ音波歯ブラシに有利な統計的有意差が認められた（p=0.003）。

RESULTS: A significant mean reduction in the full-mouth plaque index was observed after the use of both type of brushes: 46.2% ± 0.28% (p = 0.000) and 50.5% ± 0.24% (p = 0.000) for the manual and sonic toothbrush, respectively. However, there were no statistically significant differences between the two types of brushes (p = 0.277). Regarding plaque reduction on the distinct tooth surfaces, differences between the groups reached statistical significance in favour of the sonic toothbrush only on the buccal sites (p = 0.003).

結論:

両装置とも、1回の歯磨きでプラークスコアを同程度に減少させた。

CONCLUSIONS: Both devices lead to similar plaque score reduction after a single tooth brushing.