One nice little feature is that brush heads each have a small shape inscribed on the bottom like a triangle or circle. So if you are sharing the handle with someone, you can tell your brush heads apart using these little symbols. What else does it do? You can change the cleaning mode on the iO5 before turning the brush on. You can’t do this on the iO4. ARTIFICIAL INTELLIGENCE recognizes your brushing style and guides you to cover all your teeth, so you never miss a spot The iO3 is the main exception though. No case comes supplied with the standard model. But there are variants where this is supplied. The Series 9 comes with a power2go charging case that allows the iO to be charged inside whereas the Series 7 comes with a standard travel case.

As we mentioned before, the brush heads are expensive, so operating the iO for a year will cost you about 40 pounds. It is recommended that you replace your brush head every 3 months. The magnetic charger is circular in shape and wider and deeper than a standard issue Oral-B stand. It doesn’t have the prong on top for the brush to sit on. Instead, a slight convex zone in the centre aligns with the concave base of the iO9’s handle. The magnetic charger is able to recharge the battery fully in just 3 hours. Once you had a electric toothbrush you soon will know how long to brush your teeth and when to change the brush head. The key indicator is the color change from “blue” to whiteish.Make sure you thoroughly rinse the brush head after each use. Clean around the top of the brush handle too, paying particular attention to the magnetic attachment. The handle is water resistant, so don’t worry about it getting wet. Like the Genius X, the iO comes with an LED light ring at the top of the handle the color of which you can customize using the built-in screen. This LED ring also acts as a visible pressure sensor. The 3, 4, 5 and 6 all come with a standard Oral-B charger. White in colour, it has a protuberance on the top that fits into the base of the brush handle. We were enormously impressed by the performance of the Oral-B iO Series 9, and the Series 6 is basically identical, from first impressions to final testing. ENHANCED SMART PRESSURE SENSOR signals red, white or green to alert you whether you're brushing too hard, too softly or with just the right amount of pressure

I’m 40 and my parents never taught me how to brush my teeth or encouraged me to do so. My teeth are also very wonky so I clearly should have had braces as a teenager but was never given the option. The price has doubled also! The range of iO specific brush head. Specialised clean, radiant white, gentle care and ultimate clean (left to right). Beware of the mold

The verdict: Oral-B iO7 vs Oral-B iO9

The newly designed motor in the iO Series handles does change the brushing sensation, even if the way in which the bristles move is essentially the same. As a consequence of the motor and handle redesign for the iO Series, a new range of iO specific brush heads has been developed. The iO9 and 10 can hold the handle and 1 brush head only. This is because you can charge the brush inside the case. There is no battery in the case to do this. Instead, you connect the supplied proprietary power adapter.