Anatomy of the gumline and biofilm
The earlier the diagnosis, the more of your mouth stays yours.

Your gums can heal, and the earlier you start the more healthy tissue you preserve.

Clinical illustration

When patients ask me on day one whether periodontitis ever goes away, my honest answer is that it can be brought to a stop and held there for the rest of your life. The bacterial inflammation under your gum line is what is causing the bleeding, the swelling and the soreness, and that inflammation responds well to treatment. Within a few weeks of a proper begintraject, the gum tissue starts to recover, the pockets begin to shallow, and the bleeding usually settles before the trajectory is even finished. In the HOPE-CP study, which was published in the Journal of Periodontology in January 2026 and is the largest European periodontitis study to date, 51 percent of the patients reached the European clinical definition of healthy gums within six months. That figure refers to the same diagnosis you just received, measured again half a year later in a group of patients who were treated properly.

The size of that recovery depends almost entirely on how early treatment starts. Stage 1, which is under 15 percent jawbone loss, gives you the most ground to preserve, and it is also the most common stage at which patients are diagnosed today in the Netherlands. If you have been told today that you are at Stage 1 or even Stage 2, this is a relatively good moment to be hearing it, even though it does not feel that way yet.

The bacteria live in a place no toothbrush, floss thread or mouthwash physically reaches.

Clinical illustration

This is the part of the diagnosis that does not always get fully explained during the appointment. Periodontitis is caused by a thin film of bacteria that grows under the edge of your gums, about one to four millimetres below the surface where your toothbrush actually ends. Floss reaches a little further than the brush but still does not get into that depth on most teeth, and mouthwash sits on top of the gum tissue without penetrating into the pocket. That gap is the reason your dentist has scheduled a deep cleaning under the gum line, and it is the gap your hygienist tries to close again every time you come back for maintenance.

In practical terms, the brushing and flossing you are already doing are doing the work they were designed to do, which is to keep the surface clean and prevent cavities. The bacteria responsible for periodontitis live in a layer below that surface, in a place your home tools cannot get to. This is also the reason a home routine that worked fine for you for years can suddenly stop being enough once periodontitis is in the picture.

In the largest European periodontitis study of January 2026, twice as many patients reached clinically healthy gums.

Clinical illustration

The HOPE-CP study followed 200 patients with periodontitis between Stage I and Stage III for six months. Half of them received the standard care any Dutch periodontology practice would provide, which includes a professional cleaning, a sonic toothbrush and instructions for home care. The other half received the same standard care, together with ten minutes a day at home with a small Finnish medical device called Lumoral.

After six months, 51 percent of the patients in the Lumoral group had reached the European clinical definition of healthy gums, meaning bleeding on probing under 10 percent, compared with 23 percent in the standard care group. Plaque control followed a similar pattern, with 63 percent of the Lumoral group reaching plaque index under 10 percent compared with 38 percent in the standard care group. 85 percent of the patients in the Lumoral group were still using the device every day at the six-month follow-up, which is an unusually high adherence number for any home routine in oral care. The study reported no serious adverse events.

The paper was peer-reviewed by the American Academy of Periodontology and published in the Journal of Periodontology in January 2026 by Pakarinen and colleagues, under DOI 10.1002/jper.70082.

Ten minutes a day on the couch, and the device does the work for you.

The way Lumoral works in daily practice is simple enough that most patients can fit it into a normal evening without rearranging anything else they are doing. You rinse your mouth with the Lumorinse rinse, which contains a light-sensitive molecule that attaches to the bacteria in the biofilm under your gum line. You then click the mouthpiece into your mouth, and for ten minutes it emits blue light at 405 nanometres and red light at 810 nanometres into the gum tissue. The light activates the molecule, which in turn attacks the bacteria in the place they actually live.

In a normal evening this happens while you watch an episode of something on the couch, in roughly the time it takes to brew a pot of tea. There is no change to your toothpaste, no additional flossing routine, and no change to the rest of the care you already do. The general oral flora in your mouth stays largely untouched by the treatment, which was confirmed in the Nikinmaa study published in 2021. That is a relevant difference from chlorhexidine, which kills bacteria across the entire mouth and is generally prescribed only in short courses for that reason.

249€ once is the smallest cost on the list you are about to face.

Clinical illustration

Adult dental care in the Netherlands sits almost entirely outside the basic health insurance, and the numbers your dentist or hygienist will quote you over the next year tend to look something like the following, based on current Independer rates and KNMT tariffs.

The begintraject, which is four hour-long sessions of scaling and root planing under local anesthesia spread over three months, comes to around 1.600€ in most practices. Quarterly aftercare visits, which continue for the rest of your life once periodontitis has been diagnosed, run between 115€ and 200€ per visit, which adds up to between 460€ and 800€ in a typical year. An implant, in the situation where a tooth eventually cannot be saved, costs around 2.100€ per element. The KNMT publishes a worked example of a patient called Max whose dental costs in his most expensive year reached 3.461,97€. Supplementary dental insurance typically reimburses between 250€ and 1.500€ per year depending on the policy, which in practice covers about one begintraject at most.

Against that picture, Lumoral is 249€, paid once, with no subscription and no annual renewal. That is roughly the cost of two and a half combinatieafspraken, or about one fortieth of what Max paid the KNMT in his worst year. The device sits on top of the rest of your care without changing the amount you spend on visits.

Take it to your next appointment and let your dentist look at the paper with you.

Clinical illustration

Lumoral is a CE-certified Class IIa medical device, developed by Finnish dental researchers and tested in the HOPE-CP study with patients who had the same diagnosis you just received. The underlying technology is photodynamic therapy, which periodontologists have been using in the chair for years in various forms. What changed in January 2026 was the publication of evidence that an at-home version of this approach can produce comparable outcomes when used daily alongside standard treatment.

What I usually suggest to my own patients is to order it, use it consistently for six weeks, and then bring it along to the next hygienist or dentist appointment. Most clinicians will be willing to look at the device, read the abstract of the HOPE-CP paper next to your file and tell you whether they see it fitting into your treatment plan. In my own practice, most of the patients who have done this have come back from that conversation with their clinician supportive of continuing. The device is not designed to replace anything your dentist or hygienist does, and the tartar removal during your quarterly visits stays their work. Heavy smokers were excluded from the HOPE-CP study, which means the evidence we currently have applies to non-smokers and former smokers only.

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— Sanne de Vries, dental hygienist

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