Mouthwash; can it reduce levels of Covid-19 in the mouth?

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This latest rapid review from Mark-Steven Howe looks at the virucidal efficacy of commonly used oral mouthwashes. No high quality evidence was identified. Some demonstrate good virucidal properties but have poor substativity with the benefits being lost within a few minutes.

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Tooth whitening with home-based bleaching products

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This Cochrane review update of the effects of home-based tooth whitening products dispensed by a dentist or over-the-counter included 71 RCTs. However, most of thetrials were small single studies of interventions of highly variable nature providing very low-certainty evidence over short time periods to support the effectiveness of home-based chemically-induced whitening.

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Tooth whitening: Does light activation improve efficacy?

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This review of the effect of light activation on tooth whitening efficacy included 21 RCTs finding that neither the efficacy nor the risk of tooth sensitivity of in-office bleaching was influenced by the use of light, regardless of the hydrogen peroxide concentration.

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Tooth whitening: Tray-delivered gels showed a slightly better whitening efficacy

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This review of tooth whitening included 13 randomised studies and suggests that tray-delivered carbamide peroxide gel provided better whitening efficacy than HP-based products. However the available evidence is very heterogeneous and short term.

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