No — being without teeth for years does not automatically rule out All-on-4. Your jawbone does shrink after tooth loss, but All-on-4 was designed around that: two of the four implants are angled to reach the denser bone that remains, which often avoids bone grafting. A 3D scan at your free consultation shows exactly how much bone you have.
| What changes over time | What it means | How All-on-4 can work around it |
|---|---|---|
| Jawbone gets narrower and shorter | Less bone where the back teeth were | Angled rear implants reach denser bone further forward |
| Dentures loosen as the ridge shrinks | More slipping, relines, and sore spots | A fixed bridge doesn't rely on the ridge shape |
| Bite and face shape change | Lips and cheeks can look sunken | A full-arch bridge restores tooth height and lip support |
Not sure which option fits your mouth? Nine questions, no obligation, and a personalized next step.
Take the 2-minute candidate quizWhat happens to your jawbone over time?
When a tooth is gone, the bone under it slowly shrinks because it no longer gets pressure from chewing. Most of the change happens early, and it continues more slowly for years.
- loss of ridge width in the first 6 to 7 months after an extraction
- 29–63%
- loss of ridge height at 6 months after an extraction
- 11–22%
Why doesn't long-term tooth loss stop treatment?
Because All-on-4 places implants where the bone is strongest. Even people who lost their teeth 10 or 20 years ago can often get a new set. The two front implants go in straight; the two back implants are tilted to avoid areas where bone has thinned, such as near the sinuses in the upper jaw or the nerve in the lower jaw.
How does the All-on-4 method work?
Four implants support a full arch of fixed teeth. In many cases, a temporary bridge is attached the same day. The final bridge is made after the implants have healed.
Who may be a good candidate?
People who have lost most or all of their teeth in one or both jaws, whose dentures move or affect daily life, or who want teeth that stay in. Your health history, gum health, and bone volume all factor in, and only an in-person exam with a 3D scan can confirm candidacy.
Why Renew for long-term denture wearers?
Many of our patients come to us after decades in dentures. Tom Szarski has been a denturist in Ottawa for over 20 years, and our implant surgeon, denturist, and lab work together under one roof, so your plan accounts for both the implants and the teeth that go on them.
Bone that has already shrunk is the subject of dental implants with bone loss. Diabetes and smoking, as separate questions, are in dental implants with diabetes or smoking. A denture that clips on, rather than a fixed arch, is compared in snap-on dentures versus All-on-4. Candidacy at the clinic starts on what to expect.
Sources
- Tan WL, et al. A systematic review of post-extractional alveolar hard and soft tissue dimensional changes in humans. Clin Oral Implants Res. 2012 (29–63% horizontal and 11–22% vertical ridge loss)
- Maló P, Rangert B, Nobre M. All-on-Four immediate-function concept for completely edentulous mandibles. Clin Implant Dent Relat Res. 2003 (the original four-implant protocol)
Frequently asked questions
Is it too late for implants if I've had no teeth for years?
Not necessarily. Many people who lost their teeth 10 or 20 years ago can still get a fixed set of teeth. A 3D scan shows how much bone remains and which approach fits.
What happens to the jawbone after teeth are lost?
The bone that held the teeth shrinks because it no longer gets pressure from chewing. A systematic review found the ridge can lose 29 to 63% of its width within about six months of an extraction, and the change continues more slowly after that.
Will I need a bone graft?
Sometimes, but often not with All-on-4. The back implants are angled to reach denser bone at the front of the jaw. Your surgeon confirms this after the 3D scan.
I've worn dentures for decades. Can I still switch?
Yes. Long-term denture wearers are some of our most common All-on-4 patients. The consultation checks your bone and gums and explains the options, including snap-on dentures.
