Interdental Brushes vs Floss: Which Is Better for Implants?

For most people with natural teeth, the honest answer to "brush or floss?" is whichever you will actually use every day. Where both fit properly, the difference between them is smaller than the difference between doing it and not.

Around implants that equivalence breaks down. The geometry is different, the tissue seal is weaker, and there is a specific hazard — shredded floss fibres left behind at the implant surface — that does not exist around teeth.

The general recommendation for implants is interdental brushes as the primary tool, with floss retained for particular situations. Here is the reasoning.

Three differences matter.

The tissue seal is weaker. Around a natural tooth, collagen fibres insert directly into the root surface, running perpendicular to it, forming a genuine mechanical barrier. Around an implant they cannot insert into titanium, so they run parallel and form a cuff instead. The seal is real but less robust, and the blood supply is more limited because there is no periodontal ligament to carry vessels.

Inflammation progresses differently. Peri-implant inflammation tends to extend further and faster than the equivalent around a tooth, and the implant surface itself is difficult to decontaminate once exposed. Our article on identifying peri-implantitis early covers the disease and its thresholds.

The shape is different. A natural tooth narrows towards the root, giving a triangular interdental space that floss fits well. An implant is a cylinder with a crown that flares out above it, so the space beneath the crown contour is concave — floss passing through touches the widest point and skips the recess where plaque actually sits.

Our article on how implant crown design affects long-term maintenance explains how contour determines what can be reached.

They match the shape of the space. The bristles splay outwards, reaching into the concavity beneath the crown and around the curve of the abutment. This is the main advantage.

They clean mechanically in the right plane. Bristles disrupt biofilm across a surface; floss scrapes along a line. Where the plaque sits on a curved surface, the brush does more.

They can be sized to the space. Using the largest brush that passes without force means the bristles contact the surfaces rather than passing through a gap.

They are easier to use well. Most people manage an interdental brush with far less dexterity than a floss technique requires, which matters because the tool that gets used daily is the one that works.

Evidence in periodontal patients consistently favours interdental brushes over floss for reducing inflammation where the spaces permit their use, and peri-implant tissues share many characteristics with periodontally treated sites.

Shredding. This is the specific hazard. Implant components and the junction between crown and abutment can catch floss fibres, and fragments left in the sulcus behave as a foreign body. Retained floss has been documented as a cause of peri-implant inflammation, sometimes years after the fact.

It misses the concavity. As above, floss follows the widest contour rather than the recess.

Sawing motion risk. Forcing floss down through a tight contact and then drawing it back and forth can traumatise the soft-tissue cuff, which is less resilient than the attachment around a tooth.

None of this makes floss forbidden. It makes it a second-choice tool for most implant sites.

Very tight spaces where even the smallest interdental brush will not pass without force. Forcing a brush is worse than using floss.

Under bridges and full-arch restorations, where superfloss or a floss threader is designed to pass beneath the pontic and clean along its underside. This is a different job from cleaning an interdental space, and floss products do it well. Our article on cleaning under an All-on-4 bridge covers the technique.

Implant-specific floss — thicker, non-shredding, sometimes with a spongy section — is designed for this purpose and is preferable to conventional thin floss around implants.

Where a clinician has specifically recommended it for the particular contour of your restoration.

The technique matters if floss is used: pass it through the contact gently, wrap it around the surface in a C-shape, and draw it up and down along the surface rather than sawing back and forth across the tissue.

This is the part most commonly done wrong, and it determines whether the brush works.

The principle is to use the largest brush that passes through without force. Too small and the bristles never touch the surfaces; too large and it is forced through, traumatising tissue.

Sizes are colour-coded by manufacturers, though the codes are not standardised across brands. Different spaces in the same mouth usually need different sizes, and around an implant the correct size is frequently larger than the patient assumes, because the space beneath the crown contour is wider than the visible opening.

The practical route is to have the sizes identified at an appointment. Your hygienist or dentist can test each space and tell you which size goes where — a few minutes that makes the difference between a tool that works and one that does not.

Around implants, choose brushes with a coated or plastic-sheathed wire. An exposed metal wire can scratch the titanium or abutment surface, and a scratched surface retains plaque more readily. Most manufacturers now offer implant-appropriate versions.

Technique: insert gently at the correct angle, push through and pull back a few times without forcing, and rinse the brush between spaces. Replace the brush when the bristles splay or flatten, typically after a week or two.

Interdental cleaning is one component. A workable implant routine also includes:

Brushing twice daily with a soft brush. Electric brushes are appropriate around implants — our article on using an electric toothbrush on an implant addresses the common concern. A non-abrasive fluoride toothpaste is preferable to whitening pastes, which can scratch component surfaces.

Angling the brush at the margin, where the crown meets the gum, since that junction is where inflammation begins.

A water flosser where access is awkward or dexterity is limited. It is a useful adjunct rather than a replacement for mechanical disruption — our article on water flossers for implants compares the options.

Professional maintenance at the interval advised, which includes probing against baseline, checking for bleeding, and radiographs at appropriate intervals. This is the part that detects problems before they are visible to you.

Our article on cleaning an implant compared with a natural tooth covers the daily routine in more detail, and how often you should see a hygienist addresses intervals.

Worth raising at an appointment if you cannot get any interdental brush into a particular space, if a space bleeds every time you clean it, if food packs into the same place repeatedly, if you are not sure which size to use where, or if the shape of the crown makes access genuinely difficult.

That last point is important. Difficulty cleaning around an implant is frequently a restoration design issue rather than a technique failure, and it may be correctable by modifying or remaking the crown. Persisting with the wrong tool on an uncleanable shape is not a solution.

Our article on gums that hurt around an implant covers when discomfort warrants assessment.

• Implants have a weaker soft-tissue seal than teeth, and inflammation around them progresses differently

• The space beneath an implant crown is concave, which floss passes over and brushes reach into

• Floss can shred on implant components, and retained fibres can trigger inflammation

• Interdental brushes are the primary recommendation for most implant sites

• Floss retains a role in very tight spaces, under bridges, and where specifically recommended

• Correct brush sizing — the largest that passes without force — is what makes the tool effective

Can I use a metal interdental brush on my implants?

Choose a version with a coated or plastic-sheathed wire. An exposed metal wire can scratch titanium and abutment surfaces, and a scratched surface retains plaque more readily. Most manufacturers produce implant-appropriate brushes for this reason.

How often should I use interdental brushes around implants?

Once a day is the standard recommendation, as it is around natural teeth. Consistency matters more than frequency — daily disruption of the biofilm is what prevents it maturing into something that causes inflammation.

Will flossing around implants cause damage?

Conventional thin floss can shred on components, leaving fibres in the sulcus that act as an irritant, and a sawing motion can traumatise the soft-tissue cuff. Where floss is needed, implant-specific non-shredding products and a careful up-and-down technique reduce the risk.

Do I still need professional cleaning if I clean well at home?

Yes. Professional maintenance is not primarily about cleaning — it is about monitoring. Probing against baseline, checking for bleeding and comparing radiographs detect bone-level change long before you would notice anything, and that early detection is what protects the implant.

What is the best toothbrush for cleaning implants?

A soft-bristled brush, manual or electric, used with light pressure. Electric brushes are suitable and generally remove plaque effectively. What matters more than the brush is angling it at the junction where crown meets gum, which is where problems start.

Can a water flosser replace interdental brushes?

Not entirely. Water flossers are effective at flushing debris and reducing inflammation, and they are valuable where access or dexterity is limited. They do not disrupt mature biofilm mechanically as well as a brush does, so they work best alongside rather than instead of one.

If you have implants and have never had your interdental brush sizes identified, that is worth arranging — it takes a few minutes and makes the difference between a tool that works and one that does not.

You can contact our team to arrange an appointment at our Wimpole Street practice. Our dental hygiene and dental implants pages explain what is involved.

This article provides general information about cleaning around dental implants and does not constitute individual dental advice. The appropriate cleaning tools and sizes depend on your restoration design, tissue condition and dexterity, and should be identified through clinical assessment. Anyone with bleeding, swelling or discomfort around an implant should seek professional review. Wimpole Dental is regulated by the Care Quality Commission, and our clinicians are registered with the General Dental Council.

Next review due: 4 September 2027