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Synthesis of metal ion–histidine complex functionalized mesoporous silica nanocatalysts for enhanced light-free tooth bleaching

Paper ID Volume ID Publish Year Pages File Format Full-Text
1631 87 2011 9 PDF Available
Title
Synthesis of metal ion–histidine complex functionalized mesoporous silica nanocatalysts for enhanced light-free tooth bleaching
Abstract

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 H2O2 alone. Furthermore, unlike current tooth bleaching techniques that need an LED or laser to catalyze H2O2 bleaching, we demonstrated a light-free tooth bleaching system using Fe(II)–his–MSN as an efficient and reliable catalyst.

Keywords
Mesoporous materials; Silica nanoparticles; Tooth bleaching; Dye discoloration; Fenton-like reaction
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Synthesis of metal ion–histidine complex functionalized mesoporous silica nanocatalysts for enhanced light-free tooth bleaching
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Publisher
Database: Elsevier - ScienceDirect
Journal: Acta Biomaterialia - Volume 7, Issue 5, May 2011, Pages 2276–2284
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us