Jawbone Loss After Missing Teeth: Causes, Signs and Implant Options

Jawbone loss is the gradual shrinking of the bone ridge that once held a tooth root in place. It happens most often after a tooth is extracted or falls out, because the jawbone only keeps its shape and density while it is being used to chew and bite. Without that stimulation, the bone in the area starts to resorb, usually within months of the tooth being lost.

Jawbone loss is not always obvious day to day. It can show up as a denture that no longer fits, a sunken look to the lower face, or a dentist explaining that there is "not enough bone" for a straightforward implant. The good news is that in most cases the bone can be measured precisely on a scan and, where needed, rebuilt before implant treatment. This page explains why jawbone loss happens, how to recognise it, how it is diagnosed, and which treatments are used to restore the bone or work around it.

Jawbone loss usually follows tooth loss, gum disease or years of wearing a loose denture. It develops gradually and often has no obvious symptoms, which is why it is frequently only noticed on an X-ray or CBCT scan. It matters mainly because a dental implant needs a minimum amount of bone to be placed safely. Where bone has already been lost, options such as guided bone regeneration, a sinus lift or zygomatic implants can often still make implant treatment possible.

The bone that surrounds a tooth root, known as the alveolar bone, is kept dense and firm by the everyday forces of chewing and biting. When a tooth is removed or falls out, that bone no longer receives those forces and the body gradually breaks it down and reabsorbs it, a process dentists call resorption.

The loss is most rapid in the first months after a tooth is lost and then continues more slowly over years. Over time it can reduce both the height and the width of the ridge, and in the upper jaw it can also allow the sinus to expand downward into the space once occupied by a tooth root. The result is less bone available where a future implant would ideally sit, and in more advanced cases a visible change to the shape of the jaw and the support it gives to the lips and cheeks.

Jawbone loss rarely causes pain on its own, so it is usually noticed through its knock-on effects rather than a direct symptom. Common signs include a denture that has become loose or uncomfortable, a change in the fit of a bridge or partial denture, and neighbouring teeth gradually tilting or drifting into the gap left by a missing tooth. In more advanced cases, the lower part of the face can look sunken around the mouth, and the jaw itself may feel narrower to the tongue.

A few situations account for most of the jawbone loss we see:

• Missing teeth. Once a tooth is gone, the bone that supported its root is no longer loaded during chewing and starts to resorb. The longer a gap is left unfilled, the more bone is typically lost.
• Gum disease (periodontitis). Long-standing gum infection damages the ligament and bone that anchor a tooth, and can cause bone loss even while the tooth is still in place.
• Long-term denture wear. A removable denture rests on the gum and bone rather than being anchored into it, so it does not fully replace the chewing forces a tooth root once provided; bone loss under a denture tends to continue gradually over years.
• Age-related changes. Bone density can decline gradually with age in general, which can add to the effect of any of the causes above, though age on its own does not usually cause significant jawbone loss.
• Trauma or infection at the tooth root, which can accelerate local bone loss around the affected tooth.

It is worth arranging a dental check-up if a denture or bridge no longer feels secure, if a gap from a missing tooth has been left for more than a few months, if you notice gum bleeding or swelling that does not settle, or if you have been told by a previous dentist that you may not have enough bone for an implant. None of these on their own confirm jawbone loss, but they are the situations where a scan is most useful to establish exactly how much bone is present.

Jawbone loss is confirmed with imaging rather than a visual examination alone, because the bone sits beneath the gum. A panoramic X-ray gives a first, two-dimensional view of the jaws and can show obvious areas of bone loss. Where implant treatment is being planned, a CBCT (cone beam computed tomography) scan is used to measure the height, width and density of the bone in three dimensions, and to show the position of the nerves and, in the upper jaw, the sinus. This is the scan that decides whether a standard implant can be placed, or whether the bone needs to be rebuilt first.

Not every degree of jawbone loss needs active treatment. Mild loss around a single missing tooth may not stop a standard implant being placed, and your dentist will assess this from your scan rather than assume the worst. Left unaddressed for years, however, more significant bone loss tends to make later implant treatment more complex, can change the fit of dentures and bridges, and can alter the support the jawbone gives to the lower face. Replacing a missing tooth reasonably soon, whether with an implant or another option, is one of the simplest ways to limit further bone loss in that area.

Where a CBCT scan shows there is not enough bone for a standard implant, one of a few procedures is usually considered, depending on where the bone is missing and how much is needed. These are explained in detail on their own pages; here is a short summary of each.

Real patients

Before and After at Er Dental Clinic

Photos of Er Dental Clinic patients who needed bone grafting before their implants. Every case is different — ask us to see cases similar to yours.

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Jawbone loss is closely linked to missing teeth and to the treatments that rebuild bone or work around it. The pages below cover the related condition and the main implant-based options.

There is no single answer to "can I still get an implant" without a scan. The diagram below shows, in simplified form, how the CBCT findings usually guide the decision between a standard implant, bone grafting, a sinus lift or zygomatic implants — the final choice is always made by your dentist after reviewing your own scan.

Bone-related implant cases at Er Dental Clinic are assessed by Enes Yol, Oral & Maxillofacial Surgery. Every plan starts with a review of your photos and, where available, your existing X-rays or scans, followed by a written treatment plan before you travel. At the clinic, a CBCT scan confirms exactly how much bone is present, and if grafting, a sinus lift or zygomatic implants are recommended, the reasons and the cost are explained and agreed with you before treatment begins.

Send us your photos, and your X-ray or CBCT scan if you have one, for a free online consultation. Our dentists will tell you whether a standard implant is possible, or whether bone grafting, a sinus lift or zygomatic implants should be part of your plan, before you decide to travel.