What Is All-on-4 and Who Is It For?
The method is designed for complete edentulism or cases where all teeth must be removed; it is not used for single gaps.
Why are four implants enough?
Two implants are placed vertically at the front and two angled at the back. Angling allows longer implants with more bone contact and moves the support points posteriorly. Where bone allows, six implants (All-on-6) give broader support.
Suitable patients
Fully edentulous patients, those needing all teeth removed due to advanced gum disease, and long-term denture wearers with comfort problems are the main candidates.
When it is not suitable
With very advanced resorption four implants may not find adequate support. Uncontrolled diabetes, heavy smoking, radiotherapy history and certain bone medications require separate assessment.
How the Same-Day Fixed Teeth Process Works
"In a day" does not mean the whole treatment finishes in one day; it means you leave with fixed teeth on the day of surgery.
Planning
Radiographs assess bone volume, density and anatomy, and the number, position and angle of implants are planned in advance, along with the prosthesis design.
The day of surgery
Any remaining teeth are extracted, then the implants placed — usually a few hours under local anaesthesia. The temporary fixed bridge is screwed on the same day.
Healing and the soft-diet period
Diet matters in the first months: avoiding hard foods prevents early overload. This phase lasts around three months and is the part patients find most demanding.
The definitive prosthesis
After integration, an impression is taken and the definitive prosthesis made from more durable materials with zirconia or titanium frameworks.
All-on-4 Versus Conventional Complete Dentures
The difference is not only comfort; there is also a marked long-term difference for the jaw bone.
Stability and retention
A conventional denture rests on the gum and relies on suction, which weakens as bone resorbs. In All-on-4 the prosthesis is screwed to the implants, eliminating slipping and the need for adhesives.
Palatal coverage and taste
An upper complete denture covers the palate, which reduces taste and can trigger gagging. All-on-4 leaves the palate free — the difference patients appreciate most.
Effect on bone resorption
After tooth loss the jaw continues to resorb because no force reaches it; a conventional denture does not stop this and pressure can accelerate it. Implants transmit force to the bone and markedly slow resorption.
The Transition Period From Temporary to Final Prosthesis
The fixed prosthesis fitted on the day of surgery is a temporary structure; the final one is produced in a separate stage once bone healing is complete.
Why the Temporary Prosthesis Is Not Made Final Straight Away
After the implants are placed, the bone enters a healing process measured in weeks in order to integrate with the surface of the fixture. During this period the gum around the jaw changes shape and the tissues settle. If the final prosthesis were produced before this change completed, gaps could appear between the gum and the prosthesis a few months later.
The temporary prosthesis is made of a light material, can be adjusted easily and maintains speech and appearance throughout healing. It also acts as a trial: tooth length, smile line and bite are tested during this period, and the shape you are happy with is carried over to the final prosthesis.
Eating and Habits During the Healing Period
Soft, warm foods are preferred in the first days; hard, fibrous and very hot foods can create unexpected forces on the temporary prosthesis. The diet is widened gradually as healing progresses, following the order your dentist gives you.
Smoking is one of the most significant factors that adversely affects healing during this period. Habits such as biting with the front teeth, nail biting or chewing on pens can also damage the temporary structure. A healing period in which the dietary guidance is followed allows the final prosthesis to be produced on a more settled foundation.
What Influences Material Choice in the Final Prosthesis
- Whether the opposing jaw has natural teeth or a prosthesis
- Whether there is a clenching or grinding habit
- How much gum is visible when smiling
- The prosthesis volume needed to support the lip
- How repairable the material is if maintenance is needed
- The clearance that must be left under the prosthesis for cleaning
- The palatal design that affects speech
Maintenance and Follow-up Routine for a Fixed Prosthesis
Because a fixed prosthesis is not removed, cleaning is done with different tools and in a way that reaches the space beneath it.
Daily Cleaning of the Area Beneath the Prosthesis
Plaque on a fixed prosthesis collects in the narrow space between the body of the prosthesis and the gum. Since ordinary brushing cannot fully reach this area, interdental brushes, thickened floss known as superfloss and a water flosser are used together.
Cleaning habits are among the main factors determining how long the prosthesis lasts. Inflammation of the gum around an implant can progress quietly; daily cleaning both prevents it and makes early detection at check-ups easier. Which tool suits you depends on the design of the prosthesis and is demonstrated when it is delivered.
What Happens at Follow-up Appointments
At a check-up the health of the gum around the implants is assessed first, looking for bleeding, recession or deepened pockets. The screws of the prosthesis are then checked, retightened to the appropriate torque where needed, and the bite relationship is reviewed.
At intervals the prosthesis can be removed so that the surfaces beneath it are cleaned professionally and deposits that are not visible are removed. Radiographic review compares the bone level around the implants with earlier records. This regular follow-up allows a small discrepancy to be resolved before it grows.
Factors That Affect How Long a Fixed Prosthesis Lasts
- Cleaning between the teeth and under the prosthesis every day
- The effect of smoking on the tissues around the implants
- Managing a clenching habit that calls for a night guard
- Keeping follow-up appointments without interruption
- The condition of the teeth or prosthesis in the opposing jaw
- Avoiding the habit of biting hard objects
- Maintaining general health monitoring in conditions such as diabetes

































































