Water Flosser vs String Flosser: Which Is Best For Cleaner, Healthier Teeth
Medically reviewed by Dr Zaeem Jafri BDS on 6th March 2026
Keeping your teeth and gums healthy means going beyond brushing. Flossing plays a huge role in removing plaque and bacteria from areas your toothbrush cannot reach. But with so many options out there, what is really the best tool to keep your mouth in top condition? And more crucially, which method is going to be best for you? You may have been told all about string floss by your dentist in the past, but modern oral irrigators with high-powered water jets can make dental care significantly easier, but also more expensive.
In this article, we look closely at two contenders, water flossers and traditional string flossers, so you can decide what works best for you.
How We Test Oral Care Products
When we review products we follow a rigorous process to make sure our verdicts are fair and useful. We test each product over a period of weeks in real world use to assess performance comfort reliability and ease of use. For oral care devices such as water flossers we look at:
Cleaning effectiveness: How well the device removes plaque and debris below and between the gum line compared to other tools
Comfort: Can it be used daily without causing irritation or discomfort
Build quality: Are the materials durable and well made
Features: Does it offer different modes tips or pressure settings for personalised cleaning
Value for money: Is the price justified by the performance quality and longevity of the product
For string floss we test a range of popular brands by how easily they glide between teeth how strong they are against tearing and how effective they are at removing food particles. We consider ease of use and affordability too since these are key factors for most people.
Water Flosser vs String Flosser What Are They
Water Flossers are oral care devices that use a pressurised stream of water to clean between teeth and along the gum line. They typically come with a reservoir and a focused tip that pulses water to flush away plaque and debris. These high-powered jets blast away plaque build-up between teeth and get to those spots that are otherwise hard to reach with a traditional brush.
String Flossers are the traditional thread floss that most people picture when they think of flossing. You slide the floss between your teeth to physically scrape plaque from the surfaces and from just under the gum line.
Both tools aim to reduce gum disease prevent cavities and keep your smile fresh. The debate is which tool actually does the best job and whether one type suits some people better than others.
Key Features to Consider
Cleaning Performance
This is the most important factor since the main goal is to remove plaque and prevent gum disease. Water flossers often reach places string floss can miss and especially help clean pockets around the gums. But string floss gives you physical contact with the tooth surface which is great for mechanically removing plaque.
Ease of Use
Many people find water flossers easier to use especially if they have limited dexterity braces bridges or sensitive gums. String floss takes more manual skill which can be frustrating for some users.
Comfort
The sensation of a water flosser can feel gentler on sore gums compared to traditional floss which can sometimes dig into your gums if used incorrectly. That said if the water pressure setting is too high some users might find it uncomfortable so adjustable pressure is a key feature. A common report from many users is that they may initially experience light gum bleeding when they first use either flossing method, but it will quickly subside once you get using it.
Maintenance and Cost
Water flossers cost more upfront and may require ongoing costs for replacement tips. String floss is cheap and easy to replace but requires more effort every time you floss.
Portability
String floss wins here. It fits in a pocket or bag and never needs charging or water. Many water flossers are larger and need a power source though there are now compact travel versions.
Water Flossers in Detail
With rising popularity in recent years water flossers have become a mainstream choice for oral care. Below we highlight some of the best UK available models you should consider and why they stand out. Sources like the detailed NovaSmiles best water flossers guide help us identify reliable and effective models.
Oral-B OxyJet Water Flosser
This is a great choice if you are new to water flossing. It is designed with comfort in mind and uses microbubble technology to help gently remove plaque and massage gums. It also has adjustable pressure settings so you can find what works best for your mouth. We find that this is a good option if you want an entry point water flosser that still gives effective results.
Waterpik Ultra Professional
If you are someone who finds traditional water flossers too bulky this model has a very compact design but still uses powerful bursts of water to clean between teeth. It is ideal for everyday use and works especially well for anyone with braces or dental work. We find it excels in ease of use and is quick enough to become part of a daily routine.
Ordo Hydro Sonic Water Flosser
One of the best known and most recommended water flossers globally this model is available in the UK and often tops independent comparisons. It has a large water reservoir multiple pressure settings and a range of tips making it versatile for many users. Its strong performance means this is often our pick for people who want maximum cleaning power from a water flosser.
Each of these models is included or referenced in comprehensive guides like the one at Nova Smiles which help consumers find the best water flossers depending on their needs.
String Flossers Worth Considering
String or traditional flossing still holds a key place in oral hygiene. It is especially effective for physically scraping away plaque and reaching tight contacts that water might not flush as well. These are some models we recommend:
Oral-B Satin Floss
This classic floss is strong smooth and glides easily between teeth even in very tight spaces. It's affordable and a great choice if you prefer the control of traditional floss. Available in mint for an extra bonus nice flavour.
TePe EasyPick
This option comes in an easy-to-use pick format which helps if you struggle to use floss thread with your fingers. It gives a good balance of physical plaque removal with convenience.
GUM Expanding Floss
This floss expands slightly as you use it making it easier to cover more surface area of the tooth. We find this is particularly helpful if your teeth vary slightly in spacing or you have slightly broader gaps.
Traditional floss is simple and cost effective but does require proper technique to be truly effective. If you find flossing difficult or avoid it because it feels fiddly then a water flosser might help you stay consistent.
Comparing Results What Does Science Say
Studies have shown that both water flossers and string floss are effective at improving gum health and reducing plaque. Some research suggests that water flossers can be more effective at reducing bleeding and gingivitis because they flush out bacteria and food debris from deeper pockets around the gums. Others highlight that string floss gives better mechanical removal of plaque from the tooth surface.
The truth is that both tools can be beneficial and the best choice often comes down to your personal needs preferences and willingness to floss consistently. If you struggle with traditional flossing but are committed to daily routine a water flosser might help you be more consistent and thorough. If you enjoy the tactile feel of floss between your fingers and teeth then string floss is a great option. Ultimately, as long as you’re using one of these methods, you’ll get a lot of brownie points from your dentist and you’ll enjoy a healthier, cleaner mouth.
Practical Tips for Use
Start slow: Especially with water flossers, pick a lower pressure setting and work your way up as you get used to the sensation.
Floss daily: Both tools work best when used everyday not just occasionally. Daily flossing dramatically reduces gum inflammation and keeps plaque buildup in check.
Combine methods: Why choose one or the other? Many dental professionals recommend using both. Start with your water flosser to flush away debris and finish with string floss to scrape away remaining plaque.
Use the right technique: With string floss curve it into a C shape around each tooth and gently slide below the gum line. With water flossers hold the tip at a 90 degree angle to your teeth and follow the gum line.
So Which Is Best
There is no single answer that fits everyone. For many people a water flosser is best because it’s gentler, easier to use and more likely to be used consistently. Brands like the Oral-B, Ordo and Waterpik offer excellent performance and ease of use which makes them popular choices for UK consumers.
However if you are looking for precise mechanical plaque removal and you are comfortable with traditional methods then string floss such as Oral-B Satin Floss or GUM Expanding Floss remains a strong option. Traditional floss is cheap easy to carry and effective at removing stubborn plaque when used properly.
Flossing, regardless of the method, should be a part of your dental care routine
When a Water Flosser Could Win for You
You have braces or permanent dental work
You find string floss hard to use
You want a gentler cleaning experience
You struggle to floss consistently every day
When Traditional Floss Might Be Better
You want maximum mechanical removal of plaque
You prefer a no-gadgets low cost approach
You have very tight tooth contacts that water pressure might not reach as effectively
Final Thoughts
Cleaner healthier teeth start with great daily habits and flossing plays an essential role. Both water flossers and string floss have their place in oral care and the best choice depends on how you like to floss, how comfortable you are with the tool and what will keep you consistent. If you are unsure it is worth trying both.
Our testing shows that the right device used daily can really transform your oral health. Look to reliable brands available in the UK and consider your personal preferences to make the best choice. No matter what you choose the real secret is consistency it is far better to floss a little every day than to do perfect flossing only once in a while.
