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オフィスでの漂白に及ぼす光熱加速の影響
Effect of photo-thermal acceleration on in-office bleaching.
PMID: 33991277 DOI: 10.1007/s10266-021-00612-5.
抄録
光触媒を含まない漂白剤を用いたオフィスブリーチングにおいて，光熱加速がオフィスブリーチングの効率に及ぼす影響をin vitroで評価することを目的とした．人工的に変色させた牛の下切歯を用意し，過酸化水素23％を含む混合オフィスブリーチング材を，高輝度LED照明（HI群）と低輝度LED照明（LI群），38℃のオーブン（OV群），23℃の室温（RT群）で10分間処理した。漂白前と漂白後の色を測定し、色差(⊿E*)を算出した。データは二元配置のANOVAとTukeyのpost hoc testを用いて統計的に分析した。HI群とLI群の漂白剤を塗布したときの温度変化（△T）をサーモグラフィーで測定し，T検定を用いて解析した。漂白処置は6回繰り返した。HI群の照射ではΔEが最も高く，次いでLI群ではΔEが有意に低かった。照射した両モードは，照射していないOVおよびRTグループと比較して高いΔEを示したが，互いに有意な差はなかった。10分照射後の漂白剤の平均温度上昇は、HI群が15.00℃、LI群が11.80℃であった。光触媒を使用しないオフィス用漂白剤において，光熱促進効果がin vitroで証明された。
The purpose is to evaluate the effect of photo-thermal acceleration on in-office bleaching efficiency using a bleaching agent without photocatalysts in vitro. Artificially discolored bovine lower incisors were prepared, and the mixed in-office bleaching material contained hydrogen peroxide 23% was applied by following treatment for 10 min: high-(HI group) and low-intensity LED lights (LI group), oven at 38 °C (OV group), and room temperature at 23 °C (RT group). Color was measured before and after bleaching and color difference (∆E*) was calculated. The data were statistically analyzed using a two-way ANOVA and Tukey's post hoc test. The temperature change (∆T) of applied bleaching agent in HI and LI groups was measured using a thermography and was analyzed using a T test. The bleaching procedures were repeated 6 times. Irradiation in the HI group resulted in the highest ΔE, followed by the LI group whose ΔE was significantly lower. Both irradiated modes exhibited higher ΔE compared to non-irradiated OV and RT groups which were not significantly different from each other. The average temperature rise of bleaching agents in HI and LI groups after 10 min irradiation was 15.00 °C and 11.80 °C, respectively. The effect of photo-thermal acceleration was proved for an in-office bleaching agent without photocatalysts in vitro.