非過酸化水素系マウスリンスの歯のホワイトニングに対する有効性。in vitro試験

Efficacy of non-hydrogen peroxide mouthrinses on tooth whitening: An in vitro study.

抄録

目的:

過酸化水素を含まないマウスリンスの歯のホワイトニング効果を評価する。

OBJECTIVES: To evaluate the tooth whitening efficacy of non-hydrogen peroxide containing mouthrinses.

方法:

METHODS: Forty incisors were randomly assigned into four groups. Four whitening mouthrinses, Oral-B 3D White Luxe/Procter & Gamble (WL), Listerine Advanced White/Johnson & Johnson (AW), Colgate Max White/Colgate (MW), and iWhite Whitening Mouthwash/Sylphar (iW), were used over a four-week period. Color changes of L*, a*, b*, ΔE* , and ΔE , were recorded by a digital spectrophotometer (Spectroshade Micro/Mht), at baseline and intermediate week-intervals. Data were statistically analyzed using repeated measures ANOVA at α = 0.05.

結果:

L*の1週間目の平均変化量は0.76で、すべての溶液でベースラインから有意に異なり、それ以上の変化は見られなかった。これに対応して，a*は-0.36減少し，b*は0.48増加し，1.15ΔE*または0.91ΔEの色の変化に寄与した。カラーパラメータの変化については、各溶液間で差は見られなかった（p>0.05）。時間間隔の違いは有意であり（p<0.05）、主にベースラインと翌週の測定の間で観察された。時間と溶液の間には、統計的に有意な相互作用は見られなかった（p>0.05）。

RESULTS: The first-week mean change of L* was 0.76 and significantly different from the baseline for all solutions, without any further changes. Correspondingly, a* decreased by -0.36, while b* increased by 0.48, contributing to a color change of 1.15 ΔE* or 0.91 ΔE . No differences were found among the solutions in respect to color-parameter changes (p > 0.05). Differences among time intervals were significant (p < 0.05) and mainly observed between the baseline and the following week-measurements. There was no statistically significant time-solution interaction (p > 0.05).

結論:

過酸化水素を含まないホワイトニングマウスリンスは、表面的な着色を除去することで、歯のホワイトニングにわずかに寄与するが、それ以上の歯の漂白効果はない。

CONCLUSIONS: Non-hydrogen peroxide whitening mouthrinses, slightly contribute to tooth whitening, by removing superficial staining, without any further tooth bleaching effect.

臨床的意義:

過酸化水素を含まないホワイトニングマウスリンスは、初期作用が早いにもかかわらず、比較的早く限界に達する。その効果はほとんど感じられず、他の専門的な歯の漂白方法に比べて明らかに劣っています。そのため、歯の白さを維持するための補助的な方法として、主に歯の変色の再発を防ぐために使用することができます。

CLINICAL SIGNIFICANCE: Non-hydrogen peroxide containing whitening mouthrinses, despite having a quick initial action, reach their ceiling relatively soon. Their effectiveness is barely perceptible and definitely inferior to other professional tooth bleaching methods. Thus, they can only be considered as a supplementary way of keeping teeth whiter, mainly by preventing recurrent tooth discoloration.