Should I Use a Water Flosser Before or After Brushing?

A water flosser utilizes a pressurized, pulsating stream of water to clean between teeth and below the gumline. It has grown in popularity as an alternative or supplement to traditional string floss, offering a gentler method for interdental cleaning. A common question is determining the correct timing for water flossing relative to brushing. The sequence significantly influences the overall effectiveness of plaque removal and fluoride application.

The Recommended Sequence

The recommendation for maximizing oral hygiene benefits is to use the water flosser before brushing your teeth. This sequence leverages the specific functions of each tool for a more complete clean. Flossing first allows for better access to tooth surfaces during the subsequent brushing step. This approach focuses on achieving plaque disruption and ensuring the active ingredients in toothpaste work effectively.

Why Sequence Matters

The two tools serve distinct, yet complementary, mechanical functions. The water flosser’s role is the mechanical removal of loose food debris and plaque lodged in the interdental spaces and along the gum line. It uses a high-pressure stream to dislodge and flush out material that a toothbrush cannot easily reach.

By clearing this debris first, the water flosser prepares the mouth for the second, more targeted cleaning action. Brushing, especially with a fluoride toothpaste, removes the remaining thin film of bacterial plaque (biofilm) from the flat surfaces of the teeth. Flossing beforehand allows the toothbrush bristles and cleaning agents to better contact the enamel surface and penetrate the spaces between the teeth. Flossing first also ensures that the fluoride from the toothpaste is the last substance applied, allowing it to remain on the enamel longer to promote remineralization and protection against cavities.

Techniques for Effective Water Flossing

Effective water flossing requires specific technique to ensure the pressurized stream thoroughly cleans all necessary areas without causing irritation.

Preparation

Begin by filling the reservoir with lukewarm water, which is more comfortable and less likely to cause sensitivity than cold water. Lean over the sink and place the flosser tip in your mouth before turning the device on to manage the water flow and prevent splashing.

Technique and Pressure

Start with the lowest pressure setting, especially if you are new to water flossing or have sensitive gums. Gradually increase the pressure until you find a setting that feels effective yet comfortable. Hold the tip at a 90-degree angle to the tooth surface, directing the stream toward the gumline. The tip should be gently guided along the gumline, pausing briefly between each tooth to allow the water to flush the area thoroughly.

Duration and Maintenance

A comprehensive water flossing session should take about 60 to 120 seconds to ensure all areas are covered, cleaning both the inner and outer surfaces of the teeth. Using the entire reservoir of water in a countertop model indicates a sufficiently thorough cleaning session. After the session, the remaining water should be emptied, and the reservoir dried to maintain hygiene and prevent bacterial growth.