Dental implants, MRI scans and bone grafts: common questions
Short answer
Dental implants are generally considered safe for MRI scans because titanium is not magnetic, although the metal can blur images close to the mouth, so tell your radiographer about any implants. A bone graft is needed when there is not enough bone to hold an implant securely, and a 3D scan shows whether you need one. Most implants are titanium, with zirconia implants available as a metal-free alternative in some cases.
Are dental implants safe for an MRI scan?
Titanium dental implants are not magnetic, so they are generally considered safe in an MRI scanner. The metal can cause distortion on images of the head and jaw near the implant. Always tell the radiographer about any implants, crowns or bridges you have, and they will advise you.
When is a bone graft needed?
An implant needs enough healthy bone around it to stay stable. After a tooth is lost the jawbone gradually shrinks, and gum disease or infection can also cause bone loss. If there is not enough bone, a graft adds bone or a bone substitute to build up the area, either before the implant or at the same time.
Implants when bone is limited
When bone is limited, your dentist may discuss bone grafting, shorter or narrower implants in suitable cases, angled implants as used in All-on-4 treatment, or a sinus lift in the upper jaw. Planning with a 3D scan, sometimes with a surgical guide, helps use the available bone safely.
Titanium or zirconia implants?
| Titanium | Zirconia | |
|---|---|---|
| Track record | Decades of use; the standard choice | Newer, with less long-term data |
| Colour | Grey metal | Tooth-coloured, metal-free |
| Range of designs | Widest range of sizes and parts | More limited |
| Who may consider it | Most patients | Patients wanting a metal-free option |
Your dentist or implant surgeon chooses the implant system. Whatever is used, the dental laboratory needs the implant brand, system and platform to make matching implant restorations.
Frequently asked questions
Can I have an MRI with dental implants?
Generally yes. Titanium implants are not magnetic, but they can blur images near the mouth. Tell the radiographer about your implants before the scan.
Is a bone graft painful?
It is done under local anaesthetic. Some soreness and swelling afterwards is common and usually settles within days.
Are zirconia implants better than titanium?
Not necessarily. Titanium has the longest track record and the widest range of parts. Zirconia is a metal-free alternative that may suit some patients.