Only the first stage can be. Gingivitis, where the gums are red and swollen but the tooth's support is still intact, goes away once the plaque and tartar causing it are cleared, above and below the gumline, and kept off. After that, the disease eats into the bone and the fibers that hold the tooth in its socket. That loss doesn't come back by itself.
What treatment can do at that point is stop it getting worse. In selected teeth, specialist surgery can even win back some bone. No toothpaste, food, supplement or natural remedy regrows it, though. That split runs through every stage of periodontal disease, so it helps to know which side of the line your dog's teeth are on.
What can come back and what can't
Vets score each tooth on the four stages of periodontal disease, PD1 to PD4, by how much of its support has gone. PD1 is gingivitis only, with normal bone. From PD2 on, the tooth has lost attachment, under a quarter of it at PD2 and over half at PD4.
| Part of the mouth | Can it recover? | What it takes |
|---|---|---|
| Red, swollen, bleeding gums (gingivitis) | Yes | Plaque and tartar removed above and below the gumline, then daily plaque control |
| Pockets between gum and tooth | Partly. They can get shallower | Root planing by a vet, then home care |
| Bone and attachment around the root | Not by itself. Some can be regrown in selected teeth | Specialist regenerative surgery |
| A tooth that is lost or extracted | No | Nothing brings it back, so the aim is protecting the rest |
The dental guidelines of the American Animal Hospital Association (AAHA) draw the same line. Gingivitis "is reversible and preventable". Periodontitis is the "irreversible loss of the supporting tissues of the teeth", and while it "can be stabilized, it is not easily reversible".
Reversing gingivitis
The same guidelines say gingivitis is reversed by removing bacteria "above as well as below the gingival margin". Brushing reaches the first, and it removes plaque, not tartar.
So the route depends on the teeth. If they are clean apart from a soft film and the gums are just pink-red along the edge, daily brushing with a dog toothpaste can settle them. When 22 beagles were brushed every day, their gum scores had improved after one week (Enlund and colleagues, Journal of Veterinary Dentistry, 2024). Two weeks after the brushing stopped, the scores were back where they started.
If there's yellow or brown tartar, the gum sitting against it won't settle with brushing alone. That mouth needs a dental cleaning under anesthesia first, and brushing inflamed gums hurts and can put a dog off the brush. AAHA suggests a recheck 10 to 14 days after a cleaning, a good time to ask when to start brushing.
The reversal also has to be kept going. Plaque starts to stick to cleaned teeth within a day, so gingivitis comes back within weeks if the daily brushing stops, as it did in the beagles.
Once bone is lost, treatment stops it
Bone loss doesn't show when you lift a lip. It shows on dental x-rays and when the vet probes the pockets under anesthesia, so a dog whose gums look only a little red can still have stage 2 or 3 teeth.
The core treatment for those teeth is root planing, where the vet cleans and smooths the root surface inside the pocket. In a randomized, blinded trial of 34 dogs with pockets of 3.5 to 5.5 mm, the gum and pocket measures improved after root planing, and the deepest pockets improved most (Martel and colleagues, Journal of the American Veterinary Medical Association, 2019). Adding an antibiotic gel to the pockets gave no clinically relevant extra benefit over 12 weeks.
That improvement is the gum healing against a clean root. The bone stays where the disease left it.
Teeth that have lost too much are taken out. AAHA's guidelines say extraction is indicated when pocketing or recession has gone past half of the root's support.
Home care decides how long a treated tooth lasts. For stage 3 teeth, AAHA states that treatment "will only be successful" if the owner keeps up home dental care, and recommends extraction for owners who can't.
Can lost bone grow back
Yes, in some teeth, with surgery. It is called guided tissue regeneration. A veterinary dentist opens the gum, cleans the root, usually fills the gap with bone graft material and covers it with a membrane, so bone has room to fill in before the gum grows down into the space.
How well it works depends on the shape of the gap. Lee and colleagues (Frontiers in Veterinary Science, 2023) looked back at 112 of these surgeries in 54 dogs at two US university dentistry services, done between 2003 and 2021. More than half the dogs treated never came back for a recheck, so success could only be judged where both the probing and the x-rays were repeated. In vertical defects, the narrow gaps that run down beside one root, the pocket and the bone on x-ray improved in 28 of 31 (90%). In furcation defects, where bone between the roots of a multi-rooted tooth has gone, it worked in 2 of 9 (22%), and it failed in all 6 where the gap ran right through under the tooth.
A 2026 study of 67 dogs found 120 of 129 treated teeth (93%) still in place at 18 to 24 months (Park and colleagues, Veterinary Medicine, Prague). It had no comparison group and lost dogs to follow-up over time, so treat it as encouraging rather than proof.
This is specialist work, and the study authors stress choosing the right tooth and the right dog. AAHA lists regenerative surgery as an option for stage 3 teeth, on the same condition as before, that home care is kept up every day. Teeth past half their support are still usually extracted. Ask your vet whether a referral is worth it for a particular tooth.
Can you reverse gum disease naturally
You can reverse early gingivitis at home, as above, with a brush and a dog toothpaste. Nothing natural or home-made regrows bone, and we couldn't find a single dog study that measured bone regrowth from a home product. What the dog studies of home and natural care do measure is plaque, tartar and gum bleeding, usually in mouths that a vet had just cleaned.
- On teeth that hadn't been cleaned first, brushing every other day or a daily dental chew lowered the build-up over 8 weeks in 125 dogs, and no routine got the teeth clean (Gawor and colleagues, Journal of Veterinary Dentistry, 2025, funded by the maker of the products tested).
- A seaweed, Ascophyllum nodosum, fed daily to 60 small dogs after a cleaning, left 20 to 35% less tartar than a placebo over 90 days. Dogs at stage 2 or worse were excluded, and the overall oral health score didn't differ (Gawor and colleagues, Frontiers in Veterinary Science, 2018, funded by the maker).
- A probiotic given for 56 days after a cleaning left lower bleeding, plaque and tartar scores than in untreated dogs, in a pilot of 12 dogs (Misztal-Kunecka and Podgórska, Life, 2026). Dogs past stage 2 were excluded and the scoring wasn't blinded.
- We couldn't find a controlled trial of coconut oil, propolis or other kitchen remedies for gum disease in dogs.
- Soft raw bones can scrape off tartar you can see. They do nothing for bone loss under the gum, and cooked or weight-bearing bones break teeth.
So "natural" care has a real job, which is slowing plaque on a mouth that a vet has already sorted out. It isn't a way around the cleaning. We sell Caniclean, a seaweed powder that helps reduce plaque and new tartar, and that is where it fits too, after your vet has assessed the teeth, alongside brushing if your dog allows it. It won't treat gum disease. Seaweed contains iodine, so check with your vet first if your dog has a thyroid condition or takes thyroid medication.
When to see a vet
- The same day for a swollen face, bleeding from the mouth that won't stop, or a dog that has stopped eating
- Within a few days for a loose tooth, pus at the gumline, or chewing on one side and dropping food
- Within a week or two for red gums that haven't settled after two weeks of daily brushing, gums pulling back from the teeth, tartar, or bad breath that doesn't clear
- At every routine vet visit, even if your dog seems fine, since AAHA's guidelines say oral health should come up at each one
Questions owners ask
Can stage 2 periodontal disease be reversed in dogs?
Not fully. The attachment lost at stage 2 doesn't come back by itself. A cleaning with root planing, then daily home care, can stop it moving to stage 3, and the pockets often get shallower as the gum heals.
Can antibiotics cure gum disease in dogs?
No. The disease is driven by plaque on the teeth, so it needs the plaque and tartar removed. In the Martel trial, an antibiotic gel added to root planing gave no clinically relevant extra benefit. Your vet may still prescribe antibiotics for an infection or after surgery.
Is it too late if my dog's teeth are loose?
Not for the rest of the mouth, but often for those teeth. A tooth that moves has usually lost a lot of its support, and many are extracted. Treating the rest of the mouth and keeping up home care protects the teeth that are left.
References
- American Veterinary Dental College. Nomenclature (periodontal disease stages, root planing, guided tissue regeneration), avdc.org/avdc-nomenclature.
- Bellows J, Berg ML, Dennis S, et al. 2019 AAHA dental care guidelines for dogs and cats. J Am Anim Hosp Assoc. 2019;55(2), 49-69. doi:10.5326/JAAHA-MS-6933.
- Cunha E, Tavares L, Oliveira M. Revisiting periodontal disease in dogs, how to manage this new old problem? Antibiotics (Basel). 2022;11(12), 1729. doi:10.3390/antibiotics11121729.
- Enlund KB, Rahunen N, Thelander S, Olsén L. Evaluation of a thiol-detection test to assess tooth brushing efficacy in dogs. J Vet Dent. 2024;41(3), 183-191.
- Gawor J, Jank M, Harvey CE, Nicolas CS. Effectiveness of dental homecare protocols in unscaled dogs. J Vet Dent. 2025;42(3), 176-181. doi:10.1177/08987564241292769.
- Gawor J, Jank M, Jodkowska K, Klim E, Svensson UK. Effects of edible treats containing Ascophyllum nodosum on the oral health of dogs, a double-blind, randomized, placebo-controlled single-center study. Front Vet Sci. 2018;5, 168. doi:10.3389/fvets.2018.00168.
- Lee BL, Soukup J, Rendahl A, Goldschmidt S. Clinical success of guided tissue regeneration for treating vertical bone and furcation defects in dogs. Front Vet Sci. 2023;10, 1247347. doi:10.3389/fvets.2023.1247347.
- Martel DP, Fox PR, Lamb KE, Carmichael DT. Comparison of closed root planing with versus without concurrent doxycycline hyclate or clindamycin hydrochloride gel application for the treatment of periodontal disease in dogs. J Am Vet Med Assoc. 2019;254(3), 373-379. doi:10.2460/javma.254.3.373.
- Misztal-Kunecka A, Podgórska A. Innovative application of probiotic bacteria to reduce dental plaque in dogs, a pilot study. Life (Basel). 2026;16(9), 1501. doi:10.3390/life16091501.
- Park C, Rahman MM, Han K, Jeong I, Kim N. Guided tissue regeneration for severe periodontal disease in dogs, a retrospective study. Vet Med (Praha). 2026;71(9), 373-386. doi:10.17221/96/2025-vetmed.