Why does bone shrink after a tooth is lost?
The bone around a tooth is kept in shape by the forces of chewing that pass through the root. When the tooth is gone, that stimulus stops and the bone slowly narrows and lowers. Most of this change happens in the first year, and it continues more slowly after that. A denture that rests on the gum does not stop it.
That is why people who lost teeth many years ago, or who have worn a denture for a long time, more often need some bone to be rebuilt before or during implant surgery. It is also why it can be worth looking at implants earlier rather than later.
How does the doctor know whether there is enough bone?
With a 3D scan, called CBCT. A regular X-ray shows the bone in two dimensions; the 3D scan shows its height, its width and its density, and the position of the nerve in the lower jaw and the sinus in the upper jaw. The doctor plans each implant on the scan, millimetre by millimetre.
If you send photos or an older X-ray before your trip, the doctor can already tell you whether a graft is likely. The final answer comes from the scan on your first day, and any change to the plan is explained and agreed in writing before anything is done.
What is a bone graft?
A bone graft adds material where the jaw is too thin or too low for an implant. The material acts as a scaffold that your own bone grows into over the following months. It can come from a tissue bank, from a mineral source, or in some cases from your own bone. A thin membrane is often placed over it to protect the area while it heals.
There are two broad situations. Small grafts are done in the same surgery as the implant: the implant is placed and a little material is added where the bone is thin. Larger grafts are done first, and the implant is placed after several months of healing. The scan tells which applies.
What is a sinus lift?
In the upper back jaw, above the molars, sits the maxillary sinus, an air space. When teeth there are lost, the bone below the sinus often becomes too shallow to hold an implant. A sinus lift gently raises the floor of the sinus and places graft material underneath, creating height for the implant.
When only a few millimetres are missing, this can be done through the implant site itself at the same surgery. When more height is needed, the doctor reaches the sinus from the side, and the implant may be placed at the same time or a few months later.
How does a graft change the timeline?
| Situation | Typical effect on the plan |
|---|---|
| Enough bone | Implant placed on trip 1, final teeth after 3–4 months |
| Small graft at the same surgery | Same two trips, healing sometimes a little longer |
| Sinus lift with implant at the same time | Healing often 4–6 months before final teeth |
| Larger graft first, implant later | An extra stage; final teeth 6–9 months or more after the graft |
Your doctor gives you a realistic date range after the scan, so you can plan flights and time off. Our guide to one trip or two for implants explains the usual rhythm.
How does a graft change the cost?
A graft adds material, surgical time and sometimes an extra visit, so it adds to the price. A good quote says clearly whether a graft or sinus lift is included, and what it would cost if the scan shows it is needed. If your first quote was made from photos, ask for this to be written down before you travel, so there are no surprises on the day.
Are there risks?
Every surgical procedure carries risks, and grafting is no exception. The most common are swelling, bruising and discomfort for a few days. Less often, part of a graft does not take and needs to be repeated, or a sinus membrane tears during a lift and the plan is adapted. Smoking and uncontrolled diabetes raise these risks noticeably.
Your doctor explains the risks that apply to your mouth before you agree to the plan, and gives you written aftercare instructions. If anything feels wrong after you fly home, you send a photo on WhatsApp and the same doctor answers.
Are there alternatives to grafting?
Sometimes. Shorter or narrower implants can fit where the bone is limited, if the bite allows it. In a full arch, All-on-4 tilts the back implants to reach denser bone and can avoid a graft. Where implants are not suitable, a bridge or a removable denture remains an option. The doctor explains each option with its trade-offs, including how long it is likely to last.
What is the first step?
Send a few photos and, if you have one, a recent X-ray or 3D scan. A doctor tells you whether implants look possible, whether a graft is likely, and what the plan and timeline would be, before you book anything.