When to See a Periodontist in St. Louis

Revised September 14, 2026

The sink told her first. A woman in Dellwood had been spitting pink into it most mornings for the better part of a year, and every morning she told herself the same thing: she’d brushed too hard again. Then one Tuesday her front teeth looked longer than she remembered. Not dramatically longer. Just enough that she went and dug out an old photo to compare, and stood there holding her phone up next to the mirror.

Across the metro in Glendale, a man sat through a cleaning listening to his hygienist call numbers out to an assistant. Three, three, two. Four, five, five. Six. A pause, then another six. He had no idea what any of it meant, only that the numbers sounded bigger than last time and the room had gone quiet in a way it hadn’t before. At the end his dentist said the word periodontist, wrote something on a card, and slid it across the counter.

And there’s a guy in High Ridge who has been working a lower molar with his tongue for a month. It moves. Barely, but it moves, and it wasn’t moving in the spring. Nothing hurts. That’s what keeps throwing him, because he figures anything serious would announce itself.

Gum disease is quiet, which is the whole problem with it. What follows is what a periodontist is trained to do that a general dentist usually isn’t, the warning signs worth acting on this month rather than next year, how pocket depths get measured and roughly what those numbers say, which stages can still be turned around and which can only be stopped where they are, what the common treatments actually involve in plain language, how referrals and insurance tend to work, and what to ask when you finally sit down in the chair.

What doctor should I see for gum disease?

A periodontist. That’s the dental specialist trained in the gum tissue and the bone that holds your teeth in place, with several years of residency beyond dental school. Your general dentist may treat early gum disease well. Once pockets deepen or bone is involved, a specialist is the right call.

Periodontists finish dental school and then spend years in a residency built around one narrow subject: everything surrounding a tooth. They diagnose and stage gum disease, perform the surgical procedures most general offices refer out, place and repair dental implants, and treat recession, bone loss, and the occasional lesion that turns up on the gums. They also tend to catch the complicated cases. Patients on blood thinners. Patients whose diabetes will not sit still. Patients whose gums keep flaring back up after everything reasonable has already been tried.

None of that means your regular dentist was doing it wrong. Plenty of general offices treat early disease well, and a hygienist who has watched your mouth for a decade is the person most likely to notice the first change. The handoff usually happens for one of three reasons: the numbers stopped responding to ordinary cleanings, the x-rays show bone that is no longer where it belongs, or the case needs a procedure that office doesn’t perform.

How a periodontist differs from the other dental specialists

Dentistry splits up by which part of the tooth is in trouble. An endodontist works inside the tooth, on the nerve and the root canal system, which is what an endodontist does and when you need one. An oral surgeon handles extractions, impacted teeth, and jaw work, covered in what an oral surgeon does. A periodontist works outside the tooth, on the foundation. Deep, throbbing pain in one tooth points one direction. Bleeding, recession, and movement point another.

There’s a second route into a periodontal office that has nothing to do with disease. Implants. If you lost a tooth years ago and want it replaced, or the site needs bone rebuilt before anything can go in, that work often lands on a periodontist’s schedule alongside oral surgeons. It’s worth understanding how dental insurance generally treats implants before you commit to a treatment plan built around one.

What are the signs your gums need a specialist?

Blood in the sink is the signal people ignore longest. Healthy gums don’t bleed from ordinary brushing. Add persistent bad breath, gums pulling back so teeth look longer, or a tooth that has shifted or feels loose, and you are past the point where watching and waiting is a reasonable plan.

Start with the bleeding, because almost everybody misreads it. Bleeding is inflammation. It means bacteria have set up along the gumline and the tissue is reacting, not that your hand is heavy on the brush. Then the trap springs: people brush and floss more gently exactly where it bleeds, which leaves that spot dirtier, which makes it bleed more. A year of that quiet feedback loop does real damage without a single moment of pain.

Breath is the next tell. Not morning breath, and not garlic. A persistent bad smell or a metallic taste that survives brushing usually means bacteria are living somewhere a brush cannot physically reach, which is a fair description of a deep pocket. Mouthwash covers it for an hour. It does nothing to what’s causing it.

Recession is the one people notice in the mirror. Teeth look longer. A notch or a ledge appears where the enamel ends. Cold water hits a spot it never used to hit, because the exposed root surface has no enamel over it and reacts to everything. Dark triangles open between the front teeth. That last one sends more people in than the bleeding does, honestly, because it is the first sign that shows up in photographs.

Movement is the urgent category. A tooth that shifts, drifts, or wobbles has lost support underneath it. Same for a bite that suddenly feels off, a gap that wasn’t there in July, food packing between two teeth every single meal, or a partial denture that stops seating the way it did. Swelling, tenderness, or anything that looks like pus along the gumline should get a call that week, not at the next six-month visit.

A few things stack the deck. Smoking, uncontrolled diabetes, a family history of losing teeth early, pregnancy, dry mouth, and several common medications all make gum disease more likely or harder to control. Smoking is the cruel one. Nicotine narrows the small vessels in the gums, so smokers often bleed less while the underlying disease runs further. Less blood, worse disease. That combination fools people for years.

What do the pocket numbers actually mean?

Your hygienist is measuring the space between gum and tooth with a slim probe marked in millimeters, at six spots around every tooth. One to three millimeters is healthy territory. Four is a flag. Five and six mean the pocket is deeper than a brush or floss can reach, and seven or more is advanced.

Picture the gum as a collar around each tooth rather than a seal. There’s a shallow groove where the collar meets enamel, and a probe slides into it until the tissue stops it. In a healthy mouth that stop comes fast. When disease breaks down the attachment and the bone beneath it, the probe travels further before anything resists, and the number goes up. That’s the whole measurement. No magic to it.

Depth alone never tells the story, though, and this is where patients fixate on the wrong thing. A five that bleeds at every visit is more worrying than a five that has been stable and quiet for three years. So the chart carries more than depths. Whether the site bleeds when probed. How far the gum has receded, which gets measured separately and added to the depth to describe the real attachment loss. How much a tooth moves under pressure. Whether the probe can slip into the space between the roots of a molar, which is its own bad sign. Then x-rays, because bone level is the thing a probe can only infer.

Pattern matters too. One deep pocket on one back molar is often a local problem, a cracked filling or a spot nobody can reach with floss. Fives and sixes scattered across the whole mouth describe something systemic. Ask which one you have. Ask to see the chart, and ask what those same teeth read the last two times, because the direction of travel is more useful than any single visit.

Which stages of gum disease can still be reversed?

Gingivitis is genuinely reversible. It’s inflammation without attachment or bone loss, and it responds to a thorough cleaning plus consistent home care over a few weeks. Once the disease crosses into periodontitis and bone starts disappearing, the goal changes. You stop the loss and hold the line. Bone doesn’t regrow on its own.

Gingivitis looks like red, puffy gum margins that bleed easily and feel tender when you floss. The bone is intact. The attachment is intact. Clean the surfaces properly, keep them clean, and the tissue settles down and quits bleeding. That’s a real reversal, and it’s the only stage that gets one.

Early periodontitis is where the attachment starts letting go. Pockets read four and five, an x-ray shows the first bone loss between teeth, and most people still have no symptoms beyond bleeding. Moderate disease brings fives and sixes, visible recession, occasional soreness, and sometimes the beginning of that gap between molar roots. Advanced disease is sevens and up, teeth that move, teeth that drift into new positions, recurring abscesses, and the conversation nobody wants about which teeth are worth saving.

A retiree in Gray Summit found out in the worst order. He’d gone years between visits because nothing hurt, then went in about a tooth that felt funny while chewing, and the chart came back full of sixes and sevens. Treatment stabilized most of his mouth. Two teeth were already past stabilizing. That’s the practical difference between catching it at a four and catching it at a seven.

Be careful with the word “reversed.” Pockets do get shallower after treatment, and they get shallower two different ways. Inflammation resolves and the tissue tightens back against the root, which is what you want. Or the swollen gum shrinks down, which lowers the number while exposing more root, and that is a trade rather than a win. Grafting is the procedure that rebuilds tissue, and specific bone defects can sometimes be treated with regenerative techniques. Whether your particular sites qualify is a judgment your clinician makes after looking at the imaging and the shape of the defect, not something worth deciding from a web page.

What does periodontal treatment involve?

Most people start with scaling and root planing, a deep cleaning below the gumline done under local anesthetic, usually split across two or more appointments. A re-evaluation follows several weeks later to see which pockets responded. Surgery, gum grafting, and bone work come after that, only where the numbers refused to move.

The deep cleaning, in plain terms

This is not a regular cleaning done harder. A quadrant of your mouth gets numbed, and the hygienist or periodontist works below the gumline with ultrasonic and hand instruments, removing hardened calculus and bacterial film off the root surfaces and smoothing what’s left so the tissue has something clean to reattach to. Expect soreness for a couple of days and cold sensitivity that can hang around for weeks as the gums tighten and more root sits exposed. Most people describe the appointment itself as long and boring rather than painful.

Maintenance, and why the interval changes

After treatment your cleaning schedule usually shifts. Bacteria repopulate a treated pocket on a fairly predictable timeline, so maintenance visits get spaced to interrupt that cycle, often every three or four months rather than every six. Some patients alternate between the periodontist and their general office. Skipping maintenance is the most common way a good result quietly comes undone, and it happens to people who feel fine, which is exactly the point.

Lasers, surgery, and grafts

Some offices use a laser alongside scaling to remove diseased tissue lining the pocket. Protocols vary a lot between practices, so ask what the laser is doing in your case and what the alternative would be without it. Pocket reduction surgery, sometimes called flap surgery, means lifting the gum so the roots can be cleaned under direct vision, reshaping bone where it has been left in an uncleanable contour, and closing the tissue tighter against the tooth. Shallower pockets afterward, and usually more visible root.

Gum grafting rebuilds tissue over an exposed root using tissue moved from elsewhere in your mouth or processed donor tissue, which covers recession and thickens thin gum so it stops receding further. Bone grafting places graft material into a defect, often with a membrane over it, to encourage the body to rebuild in a contained space. When a tooth is beyond saving, removal and an implant becomes the conversation, and the bone site frequently needs preparing before anything can be placed.

If money is the reason you’ve stayed out of a chair, that’s worth naming out loud instead of waiting. There are free and low-cost dental options around St. Louis, including teaching clinics where periodontal work happens under faculty supervision at reduced fees. Slower appointments. Real treatment.

Facing a different kind of long fight? Here is what a litigation attorney does.

How does the referral usually work?

Usually there isn’t much to it. Most periodontal offices accept patients who call themselves, so you can book an evaluation without anyone’s permission. Your insurance plan is the part worth checking first, since a few plans want a referral on file before they process specialist claims and others don’t ask at all.

Even where no referral is required, call your general office and ask them to send records ahead. Recent x-rays, the last two or three sets of pocket readings, and any notes about what’s been tried. You avoid retaking films, and the specialist gets to see a trend line instead of a snapshot. A woman in Kimmswick who moved practices twice in four years had no history following her at all, and rebuilding it cost her an extra appointment she didn’t need to spend.

Insurance treats periodontal care differently from a routine cleaning, and understanding the structure saves a lot of frustration. Periodontal procedures are filed under their own codes with their own rules, so they run through the plan on a separate track from the checkup you’re used to. Many plans want documentation before they authorize treatment: a full set of pocket depths, current x-rays, sometimes a written narrative explaining why deep cleaning is indicated. Maintenance visits also sit in a category of their own, and how often a plan will pay for them may not line up with the twice-a-year benefit most people assume they have.

So ask the office to file a pre-treatment estimate with your plan before anything gets scheduled. The plan answers in writing, in advance, about what it will and won’t cover, and you get to make decisions with that document in front of you rather than a surprise afterward. Any office that does periodontal work regularly files these constantly. It’s a routine request, not a difficult one.

Bring your medication list to that first appointment as well. Blood thinners, bone medications, immune-related drugs, anything for diabetes or heart conditions. Some of those change how procedures get planned or timed, and the conversation goes much better before treatment than during it.

What should you ask at the first periodontal visit?

Ask for your numbers, written down, and what the same teeth measured last time. Then ask what the plan is, what happens if you do nothing for a year, and what the office expects from you between visits. A first appointment is an interview running in both directions.

Good questions to bring with you: Which specific teeth are the problem, and which are fine? What stage am I at? Where has bone been lost, and can you show me on the film? What does the non-surgical plan look like first? What happens at the re-evaluation, and what result would push us toward surgery? Which teeth are you actually worried about five years out? What maintenance interval are you putting me on, and why that one? Write the answers down. Nobody remembers a chair conversation accurately an hour later.

Shortlist two or three practices worth interviewing before you commit to a treatment plan, especially if surgery is on the table. Say plainly what you want: a full set of readings explained to you tooth by tooth, a staged plan that starts with the least invasive option that could work, and a pre-treatment estimate filed with your plan before anything is scheduled. Then compare that against what each office is prepared to provide. The gap is the signal.

One place hands you a printed chart and walks you through it without being asked. Another wants to see how you respond to a deep cleaning before discussing anything further, which is a good instinct. A third opens with surgery before the probe readings have been explained. You’ll know which is which inside of twenty minutes, and it has nothing to do with what anything costs.

Last thing, and it matters more than most patients expect. Ask what they want you doing at home, in specifics. Which tool for which gap, where you’re currently missing, whether interdental brushes suit your spacing better than floss, and what to do about smoking if that applies to you. Treatment buys you a clean starting point. What you do every night decides whether it holds.

Frequently asked questions

Can you go straight to a periodontist?

In most cases, yes. Periodontal offices routinely see patients who call on their own, so you can book an evaluation without going through your dentist first. Check your insurance plan, though, because some plans want a referral on file before they process specialist claims. Either way, ask your general office to forward recent x-rays and your pocket readings ahead of the appointment. It saves a retake and gives the specialist a history rather than a single snapshot.

How do I tell what stage of gum disease I have?

You can’t tell from a mirror, and that’s the honest answer. Staging needs probe readings at six sites per tooth, recession measured separately, and x-rays showing where the bone sits. Bleeding and puffiness without any bone loss is gingivitis. Once the films show bone loss, it’s periodontitis, and it gets described by how severe it is and how much of the mouth is involved. Ask for your numbers and ask to see the images on the screen.

How long until gum disease is serious?

There’s no clock you can rely on, because it varies enormously between people. Gingivitis can appear within a few weeks of poor cleaning and clear up just as fast. Progression into bone loss is generally slow and comes in episodes rather than a steady slide, often over months and years, and it runs faster in smokers, in people with uncontrolled diabetes, and in families where teeth are lost early. Being measured is the only way to know where you stand.

What shrinks gum pockets?

Removing what is living inside them. Scaling and root planing clears calculus and bacterial film off the root surfaces, the inflammation settles, and the tissue tightens back against the tooth, which lowers the reading. Daily home care keeps that film from rebuilding between visits. Pocket reduction surgery physically reduces depth when cleaning alone hasn’t. Some shrinkage is really the gum receding, which trades a better number for more exposed root. No rinse or toothpaste shrinks a deep pocket by itself.

Can 7mm gum pockets be reversed?

Reduced, often. Reversed is a stronger word than the situation usually supports. A seven means meaningful attachment and bone loss has already happened, and pockets that deep frequently need surgical access because instruments can’t reliably clean the bottom of them otherwise. A good outcome may leave you well below seven without ever returning to a three. Bone already lost doesn’t come back on its own, and whether a regenerative graft suits your defect is a call your periodontist makes from the imaging.

Can gums grow back from periodontal disease?

Gum tissue lost to recession doesn’t regrow on its own. Tissue follows bone, and where the bone underneath has gone, the gum has nothing to sit on. Treated gums can look slightly fuller because swelling resolves, which is not the same thing as regrowth. Grafting is how coverage and thickness get rebuilt, using your own tissue or processed donor tissue. Whether a given site can be grafted successfully depends on the bone around it, so that assessment has to happen in person.

How painful is a periodontal cleaning?

Less than people brace for. The area gets numbed with local anesthetic, so the appointment itself is usually long rather than painful. Afterward, expect tenderness for a couple of days and cold sensitivity that can linger for weeks as the gums tighten and root surface sits exposed. Over-the-counter pain relief handles most of it. Tell the office in advance if dental anxiety is an issue, since there are options. Pain that worsens after several days, or swelling, warrants a call.

Does dental insurance cover a periodontist?

Most plans include some periodontal coverage, but it runs on a different track than a routine cleaning, under its own procedure codes and its own rules. Plans commonly require documentation first: a full set of pocket depths, current x-rays, sometimes a written explanation of why treatment is needed. Maintenance visits sit in their own category too, on a frequency that may not match the twice-a-year cleaning benefit you assume you have. Have the office file a pre-treatment estimate so the plan answers in writing before you schedule.

About the Author: The St Louis Near Me Directory Team
Written by a dedicated team of St. Louis locals who live, work, and play right here in the St. Louis metro. Founder Lane Forman and team are committed to building the region’s most trusted directory by verifying listings and connecting local businesses with loyal customers across Missouri and Illinois.

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