Keep the tooth,
or take it out?

Almost every time, we want to keep the tooth if it's possible. Cats and dogs have them for many reasons — opposing teeth reduce tartar buildup, help bite position, and do many other things depending on the tooth. An extraction is permanent, and a healthy working tooth is worth real effort to hold onto.

Fortunately, the other side is true as well. Animals function WONDERFULLY with very few teeth, if any, and are far happier than they'd be with something uncomfortable or painful in their mouth.

When to remove them? That answer often lives in the gray area of medicine, where the mouth, the animal, and your life all have a say.

The bias is toward keeping

As humans, we tend to think about the risk, and people often arrive worried about whether extractions will be needed. Please remember: a dental practice is not a demolition crew. We spend far more of the day saving teeth than removing them — cleaning below the gumline, smoothing a root, coaxing an inflamed gum back to health. Dental care is like fine carpentry, not metalworking. When a tooth can be kept comfortable and functional, keeping it is the win.

Whether a tooth is comfortable and functional is the real question, and some teeth quietly fail it. When they do, keeping them isn't kindness.

First, what “bone loss” actually means

A tooth isn't set in the jaw like a fence post in concrete. Each root sits in a socket of living bone that hugs it and holds it steady. Gum disease works from the gumline down, quietly dissolving that bone away from the root. So when we say a tooth has “lost bone,” we don't mean a stain or a chip you can see — we mean the anchor is disappearing. A crown can look perfect from above while the support underneath is more than half gone. The radiographs and the probe are how we measure what's actually left.

There's a rough line at about half. A root still holding more than half of its bone has something to work with, so we treat it and keep an eye on it. Once the support slips below half, the tooth is on borrowed time — the guidelines lean toward removing it, because what's left will keep dissolving and, in time, start to hurt. And a root is often only 6–12 mm long in many animals (I'm not talking about the GIANT long-rooted carnassials or canines here). This is why a millimeter matters, and why we don't shrug at small numbers. If 50% bone loss means it's time to take a tooth, that's not a lot of room for error once some loss has started!

Right around that line is where the judgment lives. A tooth with, say, sixty percent of its support left isn't a clear extraction — it's a treat-it-and-look-again tooth. We do the periodontal work, then bring it back for a re-check to confirm it truly healed and hasn't quietly lost more ground. Below fifty percent, we're usually recommending it come out.

The reasons a tooth comes out

Its own anchor is mostly gone. The case above — bone support past the halfway point. A slow problem still on its way, not a stable tooth that happens to be quiet.

It's dragging down the tooth next door. Bone loss doesn't respect property lines. A badly diseased root lets infection pool in a deep pocket that eats into the bone holding up the healthy tooth beside it. When a good tooth is down to something close to half its own support because of the wreck next to it, the clearest way to save it is to remove the lost cause before it takes two teeth instead of one.

Problems after removal? Fortunately, eating and playing are never an issue — they did both with painful teeth! But teeth work in pairs and rows. A tooth with nothing to bite against, or one stranded after its neighbors are gone, stops earning its keep — it misses the natural scrub that chewing provides, so it just collects tartar and traps food along a quiet gumline. A lone tooth isn't automatically doomed, but the math for keeping it gets thinner. The more teeth that are missing, the less natural cleaning the mouth gets, and often a few more follow over the years. Prevention really is ideal!

The furcation

This is an example of something that has clear recommendations — and it still feels difficult, despite a clear understanding of the data. On a tooth with two or three roots, the furcation is the fork where those roots divide. When disease opens up that space, extraction is recommended, because it invariably will rot, and we probably won't know the extent until the next cleaning — or how long it's been uncomfortable.

Saving a tooth with this lesion takes a genuinely fine touch, great surgical technique, and some luck — and the odds of success are really low. It means moving the gum itself with millimeter precision: repositioning the tissue to cover and protect what's underneath so the body can heal into the right shape while a pet does what animals like to do. That is a delicate healing process after deliberate work, not a quick flap, and it depends on aftercare habits. Even with everything done perfectly, aftercare included, these still fail rather frequently.

So is it worth attempting in the right mouth? Sure, with a re-check to see how it held — but never with high expectations. The reason to extract is that it will become painful relatively soon. Preventing that without a successful flap would take deep scaling more regularly than we generally feel comfortable sedating for (and the long-term effects of regular anesthesia have limited research behind them — a study that's near impossible to take on ethically). Sometimes the more durable kindness is to remove the tooth and be done — hence the recommendation, even in teeth that feel reasonably okay at the moment.

Some hard calls

A few calls don't fit any rule, and it's more honest to show you the gray than to pretend it's black and white.

The shadow that's almost an abscess. Now and then a radiograph shows something at a root that looks nearly like a tooth-root abscess — but not quite. A vague darkening, a small pocket, a tooth hinting at trouble without confessing to it. Is it early infection worth removing the tooth over, or a quiet quirk that will sit for years? There are some papers suggesting dogs have an ability to quiet an abscess, leaving sterile pockets (not many — those are the outliers). Sometimes we're reading tea leaves, and we'll say so when we are.

The root left behind. A root tip can snap off during a difficult extraction — or even a smooth extraction in a cat, whose roots are thin and fragile. It can turn up by chance on a film years later. The textbook rule is clean and simple: find every fragment and remove it, because a retained root tends to abscess in time. Most of the time, that is exactly what we do. Often we hear about funny mouthing habits after surgery, sometimes years later, and we find a root (with or without an abscess), remove it, and the pet feels better.

Roots can be REALLY hard to find, with the tiniest pieces indistinguishable from bone on a post-operative X-ray. Lucky repositioning, or bony changes later, finally let them be seen.

There's a quieter truth. A root fragment with no sign of infection can sometimes sit stable for a long while — or forever — and chasing it out means destroying healthy bone to reach it. So we weigh it honestly. A pet with a recent extraction or a fractured tooth that's still sore? That leftover root is a prime suspect, and out it comes. An incidental fragment found in an eighteen-year-old whose mouth otherwise looks perfect — no infection, no way to know how long it's been there, and little reason to expect trouble in the years they have left — is a real conversation, weighing the digging against the odds, not a reflex. And anything we leave goes on the watch list.

Lastly — the complexity and breadth of abnormal findings are relentless. We simply don't know everything, and we often wonder how people feel with “similar” findings. The true microscopic details and physiologic responses behind similar-looking things can be massively different in humans and animals.

So we ask: will we see this tooth again?

Here's the part that surprises people. Whether we try to save a borderline tooth often comes down to something that has nothing to do with the tooth itself: can we follow up?

Saving a coin-on-edge tooth is a bet. It only pays off if someone keeps an eye on it — a re-check to confirm it's healing, and a little home care to hold the line between visits. When those are realistic — you're nearby, a follow-up is doable, and you're willing to do a bit at home — we'll gladly take that bet and work to keep the tooth. That's the outcome we want.

But when a return trip isn't in the cards — distance, cost, a pet who can't easily be put under a second time, or an honest "brushing is never going to happen at my house" — the bet changes. Now trying to save the borderline tooth risks the worst version of events: it fails quietly, hurts, and needs a whole second anesthesia to fix what we could have finished the first time. In that light, treating the tooth definitively now, while your pet is already asleep and comfortable, is not the aggressive choice. It's the kind one. Watching only works if someone is actually watching.

How we decide it with you

None of this happens to you or your dog or cat — it happens together. Most of these calls are anticipated before your pet is ever under anesthesia, and the plan is set the way you tell us to set it. At drop-off you choose how you want findings handled: pre-authorize a range and we work within it, or ask us to reach out before anything changes. When a decision comes up we call, and we send the photos and the findings so you're looking at what we're looking at.

Nothing beyond what you've approved happens without your say-so. And in the rare case we can't reach you mid-procedure, we don't guess in our own favor — we make the call we'd make for our own animal, within your budget and toward your pet's comfort. We like to know your circumstances and preferences before you leave so we're best prepared. If you want to see how the whole day is built around that, here's what to expect. These borderline calls are, honestly, a huge part of our day.

If there's a thread through all of this, it's that dentistry is less a fixed set of rules than a running series of judgment calls kept under watch. Some teeth we treat and monitor. Some we remove because the evidence — much of it borrowed from human dentistry, where people can actually describe the ache — tells us a lesion like this one hurts, and a dog or a cat feels what we feel with no way to say so. We keep looking, we keep weighing, and we keep you in it. What doesn't change is the goal: not a full set of teeth, but a mouth that doesn't hurt.