That sunken feeling at an old extraction site is alveolar ridge resorption. Your jawbone is shrinking because the tooth root that used to stimulate it is gone. Most of this bone loss happens in the first 3 to 6 months, and ridge width can decrease by roughly half within the first year. It matters because implants need bone to anchor into.

At Inspire Dental in Tigard, we hear this question almost weekly. A patient runs their tongue along the spot where a molar used to be and notices the gum feels narrower, lower, almost caved in. They wonder if something is wrong. Usually nothing is wrong in the infection sense. The body is just doing what bodies do when a tooth root disappears.

Here is what is actually happening, why the timing matters, and what your options are if you are weighing an implant down the road.

What is that sunken or shrinking feeling at an old extraction site?

Patients describe it different ways. A dip. A narrow ridge. A spot where the cheek or lip seems to pull inward. One Bull Mountain patient told us recently that her tongue kept finding a "little valley" where her lower molar used to sit.

The clinical name is alveolar ridge resorption. The alveolar bone is the part of your jaw that holds tooth roots. When a tooth root sits in that bone, every bite sends a small load through it, and that load tells the body to keep the bone strong. Pull the tooth, remove the load, and the body starts reabsorbing the bone it no longer needs.

You are not imagining it. The ridge really is shrinking.

How fast does jawbone shrink after a tooth is pulled?

Faster than most people expect. According to research published in the International Journal of Periodontics and Restorative Dentistry by Schropp and colleagues, ridge width can decrease by approximately 50 percent in the first 12 months after an extraction without any intervention. The bulk of that loss happens in the first 3 to 6 months.

A rough timeline of what we typically see:

• Weeks 1 to 4: The socket fills in with soft tissue and early bone. The visible hole closes.

• Months 1 to 6: The fastest period of bone loss. The ridge narrows and drops in height.

• Months 6 to 12: Loss continues, just slower. By the one-year mark, much of the width is gone.

• Year 2 and beyond: Slow, steady resorption that continues for years.

Front teeth show the change visibly. The lip can look slightly sunken near the gumline. Back teeth show the change through chewing. Food gets trapped differently. The bite shifts. Neighboring teeth start to drift or tip.

It is gradual. That is part of why people miss it.

Why does this matter if I want a dental implant later?

An implant is a titanium post that fuses into your jawbone. To fuse, it needs a certain volume of bone around it. Width matters. Height matters. Density matters.

If you wait years after an extraction, the ridge may simply not have enough bone left to hold an implant safely. When that happens, we have two choices. Build the bone back up with grafting, or look at alternatives.

Bone grafting works well. It also adds time, cost, and an extra healing phase before the implant goes in. The longer you wait, the more likely a graft becomes necessary.

Early planning prevents this. Sometimes we can place a graft right at the time of extraction, called socket preservation. Sometimes we can place the implant immediately. Both options keep the bone you already have.

What can be done to preserve bone after an extraction?

A few approaches, depending on the tooth and your overall plan:

• Socket preservation grafting. A small amount of bone graft material is placed in the socket the day the tooth comes out. Cochrane reviews on alveolar ridge preservation show this reduces the magnitude of ridge resorption compared to letting the socket heal on its own.

• Immediate implant placement. In the right cases, the implant goes in the same day the tooth comes out. This preserves the most bone because the implant immediately takes over the stimulation job the root was doing.

• Plan early even if you are not ready to commit. A consultation before the extraction is the single best time to decide whether grafting makes sense.

One thing worth saying plainly. A bridge or removable partial denture does not stop bone loss. The American College of Prosthodontists is clear on this. Those restorations sit on top of the gum or attach to neighboring teeth. They do not transmit chewing force into the bone the way a natural root or an implant does. The ridge keeps shrinking underneath.

Implants are the only tooth replacement that actively maintains bone volume. That is the whole trick.

Is it too late if my extraction was years ago?

Probably not. We see this scenario constantly, especially with patients from the Summerfield and King City retirement communities who had teeth pulled a decade or two ago and are now thinking about implants.

Here is how we figure it out at our office on SW Pacific Highway. We take a 3D CBCT scan, which is the imaging standard recommended by the American Academy of Oral and Maxillofacial Radiology for implant planning. The scan shows the exact width, height, and density of bone in the area. No guessing.

From there, we can tell you one of three things:

• You have plenty of bone. We can place an implant directly.

• You are close but need a graft or sinus lift first.

• The bone loss is significant enough that an alternative (bridge, partial, full-arch solution like All-on-4) makes more sense.

Honest answers. Even when the answer is not what someone hoped for.

Frequently Asked Questions

How long after a tooth extraction can I still get a dental implant?

There is no hard cutoff. We have placed implants in sites that were extracted 20+ years ago. The question is not how long ago, but how much bone is still there. A CBCT scan answers that in about 30 seconds. The longer you wait, the more likely you will need a bone graft, but "more likely" is not the same as impossible.

Does a bone graft hurt more than the extraction itself?

Most patients say no. A socket preservation graft placed at the time of extraction adds very little to the recovery, because the area is already numb and already healing. Larger grafts done as a separate procedure are more involved, but post-op discomfort is usually manageable with over-the-counter pain relief for a few days.

Will a bridge or partial denture stop the bone from shrinking?

No. This is one of the most common misconceptions we hear. Bridges and removable partials replace the visible tooth but they do not load the bone underneath. The ridge keeps resorbing year by year. Only implants transmit force into the jawbone the way a natural root does.

Can I feel bone loss with my tongue or finger?

Often, yes. Patients describe a narrower ridge, a small depression in the gum, or a feeling that the cheek pulls in slightly at that spot. If the extraction was on a front tooth, you may also notice a subtle change in lip support. A clinical exam plus a CBCT confirms what you are feeling.

How much does a bone graft add to the cost of an implant?

It varies by the size and type of graft. A small socket preservation graft at the time of extraction is typically a few hundred dollars and saves significantly more later. Larger grafts done before implant placement cost more. We give every patient a written estimate after the consultation so there are no surprises.

Talk with our Tigard team

If you have an old extraction site that feels different, or you are weighing whether to replace a tooth that came out recently, we are glad to take a look. Our in-house Implant Center on SW Pacific Highway serves families and retirees from Bull Mountain, King City, Summerfield, Tualatin, and Sherwood. Call Inspire Dental at (503) 639-4330 to schedule a consultation, and we will walk through your options together.