All-on-4 implants: a fixed full arch on just 4 implants

All-on-4 is a method where, for patients who have lost most or all of their teeth in one jaw, a full fixed set of teeth is anchored on just 4 implants. Thanks to the angled placement of the back implants, this method can often be used without bone grafting, but the decision for each patient is made only after a clinical examination. You can read more about the general implant process in the full guide to dental implants.

Who is All-on-4 suitable for?

This method is usually considered in the following cases:

• Many teeth are missing in one jaw, or all teeth need to be extracted
• Jawbone density has decreased but remains at a level sufficient for full implant placement
• The patient is looking for a fixed alternative to a removable denture
• Overall health allows for surgical treatment

It is worth noting that when bone density is very low, the dentist may recommend additional bone grafting or another approach - All-on-4 is not always a full alternative to bone grafting, but in some cases it can reduce the need for it. General information on dental implants is on the dental implant procedure page.

At the same time, for patients with an uncontrolled systemic condition (for example, uncontrolled diabetes) or active gum inflammation, the dentist usually recommends stabilising these conditions first, then decides on the implant treatment.

How many stages does the process have?

The All-on-4 process consists of several stages:

1. 1Initial examination and imaging (X-ray or a 3D scan) to assess the condition of the jawbone
2. 2Removal of existing teeth (where needed) and placement of four implants - two straight, two angled - into the jawbone
3. 3A temporary fixed bridge is often fitted the same day or within a short time, so the patient is not left without teeth
4. 4A healing period of several months takes place for the implants to fuse with the bone (osseointegration)
5. 5Once healing is complete, the final prosthesis is made and fitted

These timelines can differ depending on each patient's bone quality and overall health - only a dentist can give an exact schedule. During the healing period, the dentist usually plans several follow-up visits to monitor how the implants are fusing with the bone and the condition of the temporary bridge.

What to expect in the first days after All-on-4?

In the first days after surgery, swelling and mild pain can be considered normal - this can be managed with a dentist-recommended painkiller and a cold compress, but the dosage must only follow the dentist's instructions. A soft diet is usually recommended in the first weeks, since the temporary bridge may not yet be ready for full load.

Oral hygiene needs special attention - the dentist usually gives separate instructions on how to clean around the temporary bridge and the implant edges. Smoking is not recommended during this period, since it can slow down osseointegration.

What is the difference between All-on-4 and single implants?

When many teeth are missing across a whole jaw, there are two paths: replacing each tooth with its own implant, or building a bridge system like All-on-4. The second approach usually needs fewer implants, a shorter temporary period and gives one functional result for the whole jaw, but both approaches have their own suitability conditions. These two approaches differ in the following ways:

The choice between replacing the whole jaw and replacing individual teeth can only be made based on a clinical examination and the patient's bone condition - the information in this article is a general guide.

Many patients, after getting a full functional result with All-on-4, also want a consultation on the aesthetics of the neighbouring tooth group through the Hollywood smile procedure - this is a separate decision that needs its own assessment.

Possible risks and limitations

Like any surgical implant treatment, All-on-4 has its own risks and limitations:

• Osseointegration does not proceed at the same speed in every patient, and smoking can slow this process down
• In some cases, when bone density is not sufficient, an additional procedure (bone grafting) may be recommended
• Diet rules need to be followed during the temporary bridge period
• The result and healing time are individual, and there is no guaranteed figure
• In rare cases an implant does not fuse with the bone to a sufficient degree (osseointegration fails), in which case the dentist proposes an alternative plan

When to see a doctor

Do not delay a consultation in these cases:

• Looseness or movement is felt in the temporary or final bridge
• There is ongoing pain, swelling or bleeding around an implant
• Unusual discomfort or a sound occurs while chewing
• Your overall health status has changed (for example, diabetes control)

Frequently asked questions

Does All-on-4 always need bone grafting?

No, one of the main advantages of All-on-4 is that the angled implant placement often reduces the need for bone grafting. But when bone density is very low, the dentist may recommend an additional procedure - this decision is only made after X-ray or 3D scan results.

How long do you need to wear the temporary bridge?

This depends on healing speed and the dentist's decision - an exact timeframe can only be given after an individual assessment. Following diet and hygiene rules during this period makes healing easier.

How is All-on-4 different from a removable denture?

All-on-4 is fixed onto implants and is not removed, while a removable denture is a separate structure that can be taken out at night. There is a difference in stability and everyday comfort, but suitability for each patient depends on an individual assessment.

Can all teeth be extracted and implants placed on the same day?

In some cases yes, but this depends on the condition of the jawbone and the gums. The dentist assesses whether this is possible during the examination and may split the process into several stages if needed.

This article is for information only and does not replace a medical consultation.