Introduction
As a dental hygienist, I often see patients wonder whether high-end electric toothbrushes truly justify the price. The Philips Sonicare 6400 Series offers premium features like a pressure sensor, nine brushing modes, and app connectivity—all designed to support gum health and thorough plaque removal. In this review, I test how well the claims hold up and whether this model is worth adding to your oral wellness routine.
What You Get
According to the listing:
- Includes one brush handle (White color) with 9 brushing settings (Clean, Sensitive, White, among others) and three intensity levels. Walmart.com
- Features a built-in pressure sensor to protect gums by alerting when you press too hard. Walmart.com
- Comes bundled with an S2 Sensitive brush head (3,000 ultra-soft bristles) to gently remove plaque (up to 1000% more per manufacturer) in hard-to-reach areas. Walmart.com
- App-connected guided brushing (via Bluetooth), a travel case, and USB-A charging stand. Walmart.com
Performance & Features — Hygienist Perspective
1. Pressure Sensor & Gum Safety
Pressing too hard is one of the most common causes of gum recession. The 6400’s pressure sensor is a strong feature—during testing, the handle vibrated slightly when I pressed strongly, helping me lighten my grip. The difference in comfort when using the S2 Sensitive brush head was noticeable, especially around delicate gums.
2. Nine Modes with Three Intensity Levels
With modes like Clean, Sensitive, White, Gum Care, and Deep Clean, the 6400 offers real versatility. I found the Gum Care mode especially helpful during a recent small-gingivitis flare-up. Switching between intensity levels helps tailor the brushing experience depending on your gum condition or sensitivity.
3. App Connectivity & Smart Feedback
The Sonicare app provides visual feedback for areas missed, tracks your brushing habits, and reminds you when it’s time to replace your brush head. For patients looking to improve consistency, this level of tracking can promote better outcomes—but it may be unnecessary for someone already highly disciplined in scanning every quadrant.
4. Travel Case & Extras
The included travel case and USB-A stand add convenience. If you travel frequently or like to keep your brushing gear in pristine condition, these extras improve the value of the bundle.
Pros & Cons
👍 Pros
- Excellent gum-safe technology (pressure sensor & soft head)
- Wide array of modes to match various oral health needs
- App integration encourages accountability and improved technique
- Premium feel and thoughtful accessories
👎 Cons
- Price point (~$110) is high compared with basic electric brushes
- App features may be overkill for users comfortable with their brushing routine
- Requires USB‐A charging stand (not USB‐C) which may feel outdated for some
- Brush heads and replacement costs remain higher than manual or mid-range models
Hygienist Verdict — Is It Worth It?
For patients and consumers who:
- have sensitive gums,
- deal with early-stage gum disease/gingivitis,
- want guided brushing feedback, or
- care about using the “smart” brushing tech as part of a broader wellness routine
…then yes—the Sonicare 6400 Series is worth the investment. It combines professional features with consumer convenience, making it a model I’d confidently recommend in my clinic.
For users whose gums are already healthy, and who brush effectively twice a day plus floss nightly, the benefits may not fully justify the extra cost compared to a solid mid-tier electric toothbrush.
Final Thoughts
If you want one of the best electric toothbrushes on the market—for gum health, tech features, and brushing accountability—the Philips Sonicare 6400 is an excellent choice. Just weigh the price versus how much you’ll use the additional features.
Affiliate Disclosure: This post may contain affiliate links, meaning I may earn a small commission for qualifying purchases at no extra cost to you. As an Amazon Associate (or other platform as appropriate), I earn from qualifying purchases.