Water Flosser vs String Floss: When to Use Each (or Both) | VPSmile

String floss and water flossers are different ways to clean between teeth. Choose a method you can use comfortably and consistently, with advice from your dentist about your individual needs.

What is the difference?

String floss is guided between teeth to clean their adjacent surfaces. A water flosser uses a stream of water to clean between and around teeth. Neither replaces brushing.

Which should I choose?

• String floss: a compact option if you find it straightforward to handle.
• Water flosser: an option to discuss if hand flossing is difficult, including around braces or fixed bridges.
• Your own routine: ask your dentist which tool or combination suits your teeth and dental work. Do not assume that buying another device improves an already effective routine.

Keep the routine gentle

The American Dental Association recommends daily between-teeth cleaning, brushing twice daily for two minutes, and regular dental visits. If cleaning hurts, speak to your dentist. Follow the instructions supplied with your device.

Further reading: ADA guidance on water flossers and cleaning between teeth. These sources provide general guidance, not an endorsement or certification of VPsmile products.

How each method works in practice

String floss is wrapped around the side of each tooth in a gentle C-shape and moved up and down, including just under the gum line where it is comfortable. It needs no power, water or charging and is easy to carry. Some people find it hard to reach back teeth, to handle with limited dexterity, or to use around fixed dental work.

A water flosser directs a pulsed stream of water along the gum line and between teeth. You guide the tip tooth by tooth while leaning over the sink. It needs water, a charged battery or a power outlet, and regular cleaning of the tank and tip. Some people find it easier to use than string, especially around brackets, bridges or crowded teeth, while others prefer the simplicity of string.

Who might prefer which

Situation	Often worth discussing
You already floss comfortably every day	Keep going; a new device is optional, not required.
You skip flossing because it is fiddly	A water flosser or interdental brushes may be easier to keep up.
Braces, bridges or implants	Ask your dentist or orthodontist which tools and tips suit your dental work.
Limited hand dexterity	Floss holders, interdental brushes or a water flosser can be easier to handle.
Frequent travel	String is the most compact; a cordless water flosser can travel if emptied and charged.

Using both

Some people use string floss for tight contacts and a water flosser along the gum line, or switch depending on the day. There is no need to use both if one method already works well for you and your dentist is happy with your routine. Whatever you choose, brush twice a day with fluoride toothpaste and keep regular check-ups.

Getting started gently

• With string, slide it gently between teeth rather than snapping it onto the gums.
• With a water flosser, start with lukewarm water on the lowest setting, aim at the gum line and keep the tip moving.
• A little bleeding in the first days of a new routine is commonly reported; pain, heavy or persistent bleeding needs a dental check.
• Use your own floss or tip and replace worn accessories.

Setup tips for water flossers are in our first-use guide. If you have sensitive gums, read water flossing with sensitive gums. This guide is general information, not medical advice.

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Frequently asked questions

Is a water flosser better than string floss?

Neither is universally better. Both are ways to clean between teeth. The best choice is the method you can use correctly every day; ask your dentist which suits your teeth and dental work.

Can a water flosser replace string floss?

For some people a water flosser is their daily between-teeth cleaner, while others are advised to keep using string for tight contacts. Ask your dentist about your own routine.

Do I need to use both?

Not necessarily. Some people combine them, but if one method already works well and your dentist is happy, adding another tool is optional.

Which is easier with braces?

Many people find a water flosser easier around brackets and wires, but ask your orthodontist which tools and tips are appropriate for your treatment.

Does either replace brushing?

No. Brush twice a day with fluoride toothpaste and clean between your teeth once a day, plus regular dental visits.

Is it normal for gums to bleed when I start?

Light bleeding in the first days of a new routine is commonly reported. Stop and see a dentist if there is pain, heavy or worsening bleeding, or bleeding that does not settle. Not medical advice.