All on 4

A fixed dental implant treatment that replaces a full set of teeth.

What are All on 4 Dental Implants

All on 4 is a treatment used to replace a full set of missing or failing teeth in the upper jaw, lower jaw, or both.

Rather than placing one implant for every missing tooth, four dental implants are used to support a fixed bridge of replacement teeth. The two front implants are generally placed upright, while the two implants toward the back are placed at an angle to make use of the available jawbone.

A full set of teeth is then secured to the implants. The teeth function together as one fixed bridge.

Unlike removable dentures, All on 4 teeth stay securely in place. There is nothing to take out or soak, and they are designed to remain stable while you eat, speak and smile.

The All on 4 treatment concept has been used in clinical practice since the late 1990s and has been documented in clinical research for more than 20 years.[1]

Research shows high success rates, with around 95%–98% of implants still functioning after 10 years in many studies. A large long-term study of 245 patients reported a success rate of about 94.8% over 10 years.[2]

What is All on 6?

All on 6 is a similar full-arch treatment that uses six dental implants instead of four to support a fixed bridge of replacement teeth.

In some cases, a dentist may recommend six implants based on factors such as your jaw anatomy, bone quality and the support required for the planned bridge. The most appropriate number of implants is determined after a clinical assessment.

You can learn more about the differences on our All on 4 vs All on 6 page.

Benefits of All on 4 Dental Implants

Temporary teeth within 24 hours

Where clinically appropriate, temporary teeth may be attached on or shortly after the day of implant placement.

Fixed in place

The bridge is secured to the dental implants and does not rely on suction or adhesive to remain in position.

Greater stability when eating and speaking

Once healing is complete, fixed implant-supported teeth may feel more stable than removable dentures during everyday activities.

Helps support the jawbone

When teeth are missing, the jawbone can gradually shrink because it no longer receives stimulation from the tooth roots. Dental implants transfer chewing forces into the jawbone, which may help maintain bone around the implant sites.

Designed for ongoing use

With appropriate home care, professional maintenance and regular dental reviews, implant-supported teeth are designed to function over the long term.

WHY TIMING MATTERS

When teeth are failing, delaying treatment typically narrows your options

Once a tooth is beyond restoration, time works against you. The longer a tooth remains missing, the more bone loss tends to occur in that area, a natural process that can continue for years. This matters clinically because bone volume directly affects what treatment pathways are available to you.

More bone usually means more straightforward options

Early intervention when teeth are first failing often allows for a simpler treatment course. If you wait, additional bone loss may require supplementary procedures; bone grafting, sinus lift, or specialised implant techniques that wouldn’t have been necessary had treatment started sooner.

This isn’t about urgency or pressure to decide quickly. It’s the clinical reality that what is possible now may not be available in two or three years. The extent of bone loss, the position of your remaining teeth, and the health of your jaw structure all influence what can be done and how straightforward the treatment becomes.

We encourage you to think about timing as part of your treatment planning

If you’re noticing teeth becoming loose, decaying, or uncomfortable, a consultation allows you to understand your options now and make an informed choice about whether to proceed soon or monitor the situation. Either way, you’ll know what’s at stake.

References

[1] Malo P, Rangbert B, Nobre M. “All-on-Four” immediate-function concept with Branemark System implants for completely edentulous mandibles: a retrospective clinical study. Clinical Implant Dentistry and Related Research. 2003;5(Suppl 1):2-9. doi:10.1111/j.1708-8208.2003.tb00010.x.

[2] Malo P, de Araújo Nobre M, Lopes A, Moss SM, Molina GJ. A longitudinal study of the survival of All-on-4 implants in the mandible with up to 10 years of follow-up. The Journal of the American Dental Association. 2011 Mar 1;142(3):310-20.

[3] Patzelt SB, Bahat O, Reynolds MA, Strub JR. The all‐on‐four treatment concept: a systematic review. Clinical implant dentistry and related research. 2014 Dec;16(6):836-55.

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All on 4 FAQs

What Happens Before All on 4 Treatment Begins?

Before All on 4 treatment begins, detailed planning is carried out using digital scans, photographs, and a 3D CBCT scan.
This process allows the treating dentist to assess:

You will also have the opportunity to discuss the shape, position, and appearance of your future teeth before treatment proceeds.
Final outcomes vary based on anatomy, healing, material selection, and clinical factors unique to each patient.
Learn more about the full All on 4 process.

Do All on 4 Teeth Stay In Permanently?

Unlike removable dentures, All on 4 teeth are fixed into the jawbone and are not removed overnight. They do not rely on suction or adhesives to remain stable.
The prosthesis is professionally maintained and removed by your treating dentist when required for servicing or review. While fixed in everyday function, ongoing maintenance remains important.
All on 4 is designed to function as a fixed tooth replacement option rather than a removable appliance.

How long does All on 4 treatment take from start to finish?

The All on 4 implant procedure is completed within one day, and temporary fixed teeth are often fitted within 24 hours, where clinically appropriate. The final teeth are placed once osseointegration (healing) is complete, which typically takes 3-4 months. In total, the entire process can take up to 6 months. Timelines may vary from person to person.

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