Philips Sonicare 9900 Prestige

philips.com

Philips built the Prestige around SenseIQ: the handle reads pressure, motion and how much of the mouth has been covered, then adjusts intensity in real time instead of simply buzzing at you. Sonic technology drives fluid between the teeth rather than scrubbing them, which suits receding gums and thin enamel. The All in One head is meant to cover plaque removal and stain lifting at once, and the charging travel case tops the brush up from a USB port. Two weeks of battery is the usual figure.

A good fit for anyone who finds the rotating heads too aggressive or noisy at the gum line. Less convincing for gadget minimalists, because the price is close to a decent phone and the quiet automatic adjustment is easy to miss. Heads are chipped for recognition, so the cheapest third party copies will not be identified by the handle.