https://scholars.lib.ntu.edu.tw/handle/123456789/162869
標題: | Synthesis of Metal Ion-Histidine Complex Functionalized Mesoporous Silica Nanocatalysts for Enhanced Light-Free Tooth Bleaching | 作者: | BOR-SHIUNN LEE Huang, Li-Chun Hong, Chen-Yu Wang, Shy-Guey Hsu, Wei-Hang Yamauchi, Yusuke Hsieh, Chia-Jung Lai, Juin-Yih KEVIN CHIA-WEN WU |
關鍵字: | Mesoporous materials;Silica nanoparticles;Tooth bleaching;Dye discoloration;Fenton-like reaction | 公開日期: | 2011 | 卷: | 7 | 期: | 5 | 起(迄)頁: | 2276-2284 | 來源出版物: | ACTA BIOMATERIALIA | 摘要: | Several metal ion-histidine complex functionalized mesoporous silica nanoparticles (MSN) were synthesized and utilized as efficient catalysts for enhanced and light-free tooth bleaching. Fe(II), Mn(II), and Cu(II) ions were successfully immobilized in histidine-functionalized MSN and their catalytic abilities against discoloration of a dye ( Orange II) in both test tubes and extracted tooth models were compared and discussed. Through direct observation of test tubes and calculation of mean color changes of extracted teeth we concluded that Fe(II)-his-MSN exhibited better catalytic competence than Mn(II)-his-MSN and Cu(II)- his-MSN because of its intrinsic redox ability. In test tubes Orange II was completely degraded within 6 h when Fe( II)-his-MSN was used as the catalyst. For the extracted tooth model the presence of Fe(II)- or Mn(II)- his-MSN significantly enhanced the efficacy of tooth bleaching for three regions, the enamel, outer dentin, and inner dentin, of stained teeth compared with H(2)O(2) alone. Furthermore, unlike current tooth bleaching techniques that need an LED or laser to catalyze H(2)O(2) bleaching, we demonstrated a light-free tooth bleaching system using Fe(II)-his-MSN as an efficient and reliable catalyst. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/240637 http://ntur.lib.ntu.edu.tw/bitstream/246246/240637/1/901.pdf |
DOI: | 10.1016/j.actbio.2011.01.007 |
顯示於: | 口腔生物科學研究所 |
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