Sensitivity toothpastes require a period of twice daily use to benefit from lasting protection against the pain of dentinal hypersensitivity.
Potassium Nitrate
Clinical studies have shown that sensitivity toothpaste containing potassium nitrate, such as Sensodyne Multicare and Sensodyne Gentle Whitening, relieve tooth sensitivity in as little as 2 weeks, with twice daily brushing.
Stannous Flouride
Clinical studies have shown that Sensodyne toothpastes containing stannous fluoride (Sensodyne Complete Protection) relieve tooth sensitivity in 4 weeks, with twice daily brushing.
NovaMin
Clinical studies have shown that, with twice daily brushing, toothpastes containing 5% NovaMin (Sensodyne Repair & Protect) starts to work in as little as 1 week and provides significant benefits in as little as 2 weeks, with clinical improvements continuing over 6 months.
Always read the label and follow the directions for use. Sensitive teeth may indicate an underlying problem that needs prompt care. If symptoms persist or worsen, see your dentist.