Tooth Bleaching Techniques and Clinical Efficacy
Summary
Tooth bleaching has become a cornerstone of aesthetic dentistry, employing chemical agents to oxidise organic chromophores within enamel and dentine. The principal techniques comprise in-office procedures using high-concentration peroxide formulations and supervised at-home regimens with lower-strength gels. Light-activated systems aim to accelerate peroxide decomposition, whereas emerging interest in natural extracts seeks to reduce sensitivity and soft-tissue irritation. Clinical efficacy is gauged by objective colourimetric shifts, long-term stability and patient-reported outcomes such as discomfort and satisfaction. While peroxide-based methods yield predictable whitening, they risk transient sensitivity and alterations in enamel microhardness. Recent advances address these limitations via adjunctive antioxidants, calcium or fluoride incorporation and optimised activation protocols. Globally, tooth bleaching intersects patient demand for minimally invasive cosmetic treatments and rigorous safety standards, underscoring the need for standardised evaluation methods and evidence-based guidelines to balance efficacy with oral health preservation.
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Tooth Bleaching Techniques and Clinical Efficacy publication trend
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Technical terms
Hydrogen peroxide: A bleaching agent that oxidises organic chromophores in enamel to lighten tooth colour.
Carbamide peroxide: A compound that decomposes to release hydrogen peroxide and urea, used in at-home bleaching gels.
Chromophore: A molecule or molecular structure that absorbs visible light, causing tooth discolouration.
Spectrophotometry: A technique to quantify colour change (ΔE) by measuring light absorption or reflection.
Light activation: Use of LED or other light sources to accelerate peroxide decomposition and enhance bleaching efficacy.
Tooth sensitivity: Transient discomfort or pain resulting from enamel or dentine changes induced by bleaching agents.
References
- Whitening Effect of Juglans regia Dry Husk Extract on Primary and Permanent Teeth. International Journal of Biomaterials (2023).
- Antioxidant activity by DPPH assay of potential solutions to be applied on bleached teeth. Brazilian Dental Journal (2012).
- A Critical Review of Modern Concepts for Teeth Whitening. Dentistry Journal (2019).
- Effect of violet LED light on in-office bleaching protocols: a randomized controlled clinical trial. Journal of Applied Oral Science (2020).
- Peroxide bleaching agent effects on enamel surface microhardness, roughness and morphology. Brazilian Oral Research (2004).
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