Optimal Pressure for Clean Teeth

Welcome to All Sensors “Put the Pressure on Us” blog. This blog brings out pressure sensor aspects in a variety of applications inspired by headlines, consumer and industry requirements, market research, government activities, and you.

Optimal Pressure for Clean Teeth

While some electric toothbrushes use pulsating water jets or oral irrigators with water pressures between 10 to 100 psi, some ultrasonic technology toothbrushes now integrate a pressure sensor to avoid brushing too hard. With their built-in pressure sensors, Philips ProtectiveClean or DiamondClean Smart series of toothbrushes have at least three modes and three intensities.

If the user is brushing too hard, the toothbrush handle vibrates and makes a pulsing sound as a reminder to not exert as much pressure. Other toothbrush manufacturers, such as the Oral-B Genius Pro 8000, have also integrated pressure sensors into their toothbrushes. This indicates that users are receiving value and willing to pay more, sometimes a lot more, for these premium types of toothbrushes. With a pressure sensor, the user can optimize the cleaning process and avoid damage to gums and even teeth.

While manufacturers reveal no information about the pressures involved, a university study from the 1970s found that 19.53 gm/mm2 (191.5 kPa or 27.8 psi or 1437 mm Hg) ±6.48 gm/mm2 (63.55kPa or 9.22 psi or 477 mm Hg) typically resulted from using a hard bristle toothbrush with lower pressures for soft and powered toothbrushes.

Koninklijke Philips N.V.  Sonicare ProtectiveClean 6100

Figure courtesy of Koninklijke Philips N.V.

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