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Philips Sonicare DiamondClean Review

This sleek and stylish toothbrush looks great and cleans well but is exceptionally expensive
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philips sonicare diamondclean electric toothbrush review
Philips Sonicare Diamond Clean
Credit: Philips Sonicare
Price:  $220 List
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Manufacturer:   Philips
By David Wise and Austin Palmer  ⋅  Oct 10, 2018
  • Comfort - 40% 6.0
  • Cleaning - 30% 8.0
  • Ease of Use - 20% 5.0
  • Battery Life - 10% 4.0

Our Verdict

The DiamondClean by Sonicare is one of Philip' high-end electric toothbrushes, offering a sleek, matte appearance coupled with great cleaning performance. This luxury toothbrush includes multiple accessories, including an inductive charging water glass and a USB charging travel case. While this brush did deliver one of the best cleaning performances we have seen and is decently comfortable to use, there are multiple models that matched this performance and retail at a fraction of the price. If you absolutely love the look of this brush and can foot the bill, then it might be a good option, but most people are probably going to balk at buying a $200 toothbrush.
Great cleaning power
Lackluster battery life

Our Analysis and Test Results

The standard DiamondClean scored about the same as the Oral-B Genius Pro 8000 and just a few points behind the HealthyWhite+. All three of these brushes clean about the same, tying for the top score, but the DiamondClean and the HealthyWhite+ both are undoubtedly much more comfortable to use. The Oral-B is a little easier to use, while the HealthyWhite+ has the best battery life of this trio. However, these are all pricey products, with the DiamondClean being the most expensive with a list price of $200, followed by the Pro 8000 with a list price of $180 and the HealthyWhite+'s list price of $120. For comparison, our highest scoring brush overall costs about $70.

philips sonicare diamondclean electric toothbrush review - the smooth, matte finish on the diamondclean gives it a great...
The smooth, matte finish on the DiamondClean gives it a great ergonomic feel.
Credit: Kat Elliott

Performance Comparison

In our quest to find the best electric toothbrush of them all, we have been buying all the best brushes available on the market over the last two years and testing them head-to-head to see which ones are really worthy of an award. We have refined our testing process along the way to best score and compare these products, dividing it into four different rating metrics, each weighted with respect to their significance.


Responsible for the largest portion of the overall score, our Comfort metric accounts for 40% of the overall score for each of the electric toothbrushes in our review. The bulk of this metric's score is based on how it felt to brush with each toothbrush, as rated by our panel of testers. Additionally, we also compared and scored how loud each brush is and if there is a pressure sensor to alert you to back off when you are applying too much pressure. The DiamondClean did quite well, earning a 6 out of 10 for its better than average comfort levels.

None of our testers felt that it was at all uncomfortable to use this toothbrush, with the bulk of our testers rating this brush very close to the top when it came to comfort. The DiamondClean uses a side-to-side cleaning motion and has a much shallower brush head than some of its competitors, making it a bit less abrasive for sensitive gums and a little less cumbersome to clean the teeth in the back of your mouth. The presence of a sensitive mode is also extremely beneficial for those with sensitive gums.

The DiamondClean sounded in at 57 dBa on the sound level meter, measured 2" away from the mouth when brushing. This makes it one of the quietest brushes we have tested and neither the brusher nor the bystander found the tone of the toothbrush to be particularly annoying or distracting.

Surprisingly, the DiamondClean lacks a pressure sensor, hurting its score slightly.


Following our set of comfort tests, our cleaning challenge came next in terms of importance, constituting 30% of the total score for each electric toothbrush. For this test, we scored each brush on how much plaque each one removed for our panel of testers. The plaque removal consisted of our testers forgoing brushing for a period of about 16 hours, then chew a plaque disclosing tablet. This would dye all of the accumulated plaque bright red. After brushing, before and after photos were compared to see which spots were missed with each model of toothbrush.

philips sonicare diamondclean electric toothbrush review - the accumulated plaque dyed pink prior to the cleaning test with the...
The accumulated plaque dyed pink prior to the cleaning test with the DiamondClean.
Credit: Veronica Palmer

The DiamondClean tied for the top performance in this test, meriting a 6 out of 10 for its results. This brush removed virtually all of the plaque for most of our testers.

For the testers that didn't get all of the plaque removed by the DiamondClean, there were only a few tiny spots that remained.

philips sonicare diamondclean electric toothbrush review - the diamondcare scored the highest when it came to holding comfort.
The DiamondCare scored the highest when it came to holding comfort.
Credit: Jenna Ammerman

Ease of Use

Next, we moved on to evaluating how easy to operate and how convenient to use each brush is, as it makes it quite hard to establish good brushing habits if the brush is a pain to use. We looked at how user-friendly the interface is, how hard the brush is to clean, if there is an easy way to store multiple brush heads, and if there is a brushing timer. This metric accounts for 20% of the total score for each brush, with the DiamondClean doing decently well, meriting a 5 out of 10.

As noted previously, this model appears to have had significant effort put into its ergonomic and visual aesthetic and was the clear winner when it came to visual appeal. The brush head has an easy to use, push-on attachment method, as well as five different cleaning modes to select from. There is a one-button interface to toggle between modes, with the brush giving you a five-second window to switch between them when first powered on.

philips sonicare diamondclean electric toothbrush review - different cleaning modes on the diamondclean.
Different cleaning modes on the DiamondClean.
Credit: Jenna Ammerman

This model also has an extremely unique charging base: an actual glass cup that fits over an inductive charger, allowing you to simply place the toothbrush in the cup to recharge. This makes the brush extremely stable on the base, and exceptionally difficult to knock over accidentally.

philips sonicare diamondclean electric toothbrush review - the diamondclean in its fancy, inductive charging cup.
The DiamondClean in its fancy, inductive charging cup.
Credit: Jenna Ammerman

Unfortunately, there isn't a handy way to store additional brush heads with this charging base. However, this brush includes a USB-powered charging travel case, which does have spots for 2 brush heads.

philips sonicare diamondclean electric toothbrush review - the diamondclean comes with a travel case that also charges the...
The DiamondClean comes with a travel case that also charges the toothbrush.
Credit: Kat Elliott

We also found this brush to be one of the easiest to clean, with only a little extra effort required to remove any toothpaste residue from the area around the interface button. Finally, this brush does have a two-minute timer, split into 30-second segments for quadrant brushing, with the brush stopping after two minutes.

Battery Life

For our battery test, we ran each toothbrush for four minutes a day, two in the morning and two in the evening, and scored each brush on the number of days that it lasted. This metric is worth the last 10% of the total score, with the DiamondClean performing slightly below average, earning a 4 out of 10 for its results.

This brush lasted for 18 days in our test, which you can compare with the rest of the brushes below.


This is an extremely expensive toothbrush, with an MSRP of $200. For many, that would instantly preclude purchasing it, especially as it was outperformed by much less expensive toothbrushes, but it may be worth it if you put a high value on the visual aesthetic and the additional accessories.


All in all, this is a strong performer and fits in its place as one of the highest-end models of all the Sonicare toothbrushes, It looks great, and has some neat additional accessories like the rock-solid charging base and travel case with integrated charger. Unfortunately, this is an expensive product, and you end up paying for some luxury features that aren't really necessary or helpful in maintaining your dental health.

David Wise and Austin Palmer