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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The Pressure for Healthy 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.

The Pressure for Healthy Teeth

Pulsating dental water jets or oral irrigators have been used for dental healthcare for over 50 years. The pulsating stream of water and special tips provide a treatment for braces, sensitive teeth, plaque and gingivitis. One manufacturer offers countertop water flossers with 3, 6, or 10 pressure settings ranging from 10–90 or 10-100 PSI and cordless water flossers with 2 or 3 pressure settings from 45–75 PSI.

Water Flossers - Countertop vs. Cordless

The pressure range and adjustability vary depending on the type of water flosser.

With the lowest (1) setting of 10 PSI and the highest (10) setting of 100 PSI, the ten adjustments steps on one model provide approximately 10 psi increments between steps. The user does not have to relate to the actual pressure but just know that if they have sensitive teeth they want to start with the #1 step (10 psi). Experienced users often use the higher-pressure settings. Since the pressure settings are all relative, a pressure sensor is not required in the flosser. However, as in any product that involves pressure, the design pressures need to be verified by laboratory testing to establish the typical and maximum pressure settings and verified in manufacturing for consistent quality using highly accurate pressure sensors.

Comments/Questions?
Do you have a pressure sensing question? Let us know and we’ll address it in an upcoming blog.
Email us at info@allsensors.com