All-on-4 and All-on-6 - fixed teeth in one day: who qualifies, how the process works and what to really expect

For patients who wear a full denture or have lost most of the teeth in one jaw, the All-on-4 and All-on-6 concept has, over the last two decades, changed the standard in dentistry. Instead of the classic 8-10 implants per jaw (expensive, time-consuming, often impossible due to lost bone), an entire jaw can today be rehabilitated with just 4 or 6 implants - and a fixed prosthesis is often placed the same day. The patient leaves the clinic with teeth that don't come out, don't wobble and look natural. In this guide we explain exactly what All-on-4 and All-on-6 are, who is a candidate (and who isn't), how the procedure works from first appointment to final restoration, what it costs in Serbia and what to realistically expect in the first few months.

What All-on-4 is and where the concept came from

All-on-4 is a concept developed by the Portuguese dentist Dr Paulo Maló in the mid-1990s, in collaboration with Nobel Biocare. The idea was simple but ingenious - instead of placing 8-10 implants for fixed teeth on an edentulous jaw (which requires sufficient bone, long rehabilitation and high cost), Maló showed that 4 strategically placed implants were enough to support a fixed bridge across the entire jaw.

The key innovation - the two posterior implants are placed at an angle (tilted, up to 45 degrees) instead of vertically. This makes use of existing bone, avoids sensitive zones (the sinus in the upper jaw, the nerve in the lower) and supports a longer bridge with fewer implants.

After more than two decades of clinical study, All-on-4 is today the most proven concept for edentulous patient rehabilitation - with a success rate above 95% and clinical studies tracking patients for 15-20 years.

The difference between All-on-4, All-on-6 and other variants

Although often used as synonyms, there are subtle but important differences:

All-on-4. Four implants per jaw. Two front vertical, two posterior tilted. The most economical choice. Most often sufficient in patients with preserved anterior bone and no extreme chewing demands.

All-on-6. Six implants per jaw. Better force distribution, safer long-term stability, suitable for patients with an active lifestyle and above-average bite loads. If one implant fails, the remaining five still hold the work.

All-on-X (5, 8 or more). In specific cases, particularly when a ceramic prosthesis is planned or when bone is poorer in certain zones, 5, 8 or more implants are used.

The general rule: more implants means better force distribution but higher cost. All-on-6 is the sweet spot for most middle-aged patients seeking the safest long-term solution.

Who is a candidate for All-on-4 / All-on-6

A typical candidate is in one of the following situations:

Full denture wearer who is bothered by the denture moving, causing pain or triggering a gag reflex.
Patient with only 2-4 remaining teeth per jaw, all of them loose (periodontitis), fracturing or with poor prognosis.
Patient with advanced periodontal disease with multiple loose teeth and a recommendation for total rehabilitation.
Patient who previously had classic implants that failed due to periodontitis, poor planning or complications.
Middle-aged patient (40-65) who refuses a full denture because it is aesthetically unacceptable.
Patient told there isn't enough bone for classic implants - All-on-4 uses the available bone more cleverly.

The greatest advantage compared to a full denture is obvious: the teeth are fixed, don't come out, don't wobble, don't fall out when eating or talking. Chewing works almost like with natural teeth (up to 90% of force). Aesthetics is dramatically better because the denture "palate" doesn't cover the front of the roof of the mouth, so the patient normally feels taste and food temperature.

Who is NOT a candidate - absolute and relative contraindications

All-on-4 is not a solution for everyone. The following situations require either delay or a completely different approach:

Patient on active bisphosphonate therapy. Osteoporosis medication (e.g. Aclasta, Bonviva) can cause jaw osteonecrosis after surgical intervention. Consultation with the prescribing physician is mandatory.
Uncontrolled diabetes (HbA1c over 8). Poorer osseointegration, higher failure risk.
Patient recently treated with radiotherapy in the jaw area. A relative contraindication depending on dose and location.
Active smoker over 15 cigarettes a day. Not an absolute contraindication, but failure rates rise significantly. We insist on reduction or quitting 2 weeks before and 2 months after.
Patient with severe untreated bruxism. Grinding forces can break the fixed work and cause implant fractures. Bruxism must be controlled first.
Patient under 18. The jaw is still growing, the implant could shift relatively as growth completes.
Patient unable to maintain hygiene (cognitive impairment, physical limitations). All-on-4 requires careful daily care - without it, the result is peri-implantitis and short-term failure.

In our practice we never proceed with All-on-4 without a serious prior assessment. Better that a patient return in 6 months after stopping smoking or controlling sugar, than that the implants fail in 2 years.

What diagnosis and assessment look like

Before the work itself, 30-60 days of detailed preparation and analysis are needed:

1. First consultation (60-90 minutes). Detailed discussion of general health, previous dental work, medication, habits (smoking, alcohol), expectations. Examination of existing teeth or denture. Photography of smile and face from multiple angles.

2. CBCT scan (3D X-ray). Absolutely mandatory for every All-on-4. Shows exact bone height and width in all zones, sinus position in the upper jaw, position of the lower alveolar nerve, bone density. Without CBCT, planning All-on-4 is guesswork.

3. Blood tests. Standard: CBC, glucose, HbA1c, coagulation. As needed: thyroid hormones, parathormone, vitamin D. If any abnormality is found, we refer the patient to an internist before work.

4. Digital case planning. Using specialised software (e.g. SmartImplant, NobelClinician), implants are placed virtually on the CBCT model. Each implant's exact position, angle and dimensions are decided. A surgical guide is made that positions in the mouth during surgery - the implant goes exactly where planned.

5. Impression or digital scan. For fabricating the temporary prosthesis that will be placed the same day implants are placed.

6. Plan presentation to the patient. Before any work, the patient receives a written treatment plan with all steps, timeline, cost (transparent), described materials and expected result. Plus a discussion of alternatives (classic implants, full denture).

Procedure step by step - from morning to evening

The day of implant placement and temporary prosthesis fitting is long - typically 6-9 hours in the clinic. Here's a typical timeline:

08:00 - Preparation. Patient arrives fasted or with a light breakfast (if local anaesthesia with sedation is planned; general anaesthesia requires 6h fasting). Premedication - antibiotic 1h before (Augmentin 1g) and a calming agent (Apaurin 5mg, optional).

09:00 - Extraction of existing teeth (if any). Under anaesthesia (local or general, by agreement), all remaining teeth in the jaw being rehabilitated are extracted. Bone is shaped to make room for the fixed prosthesis.

10:30 - Implant placement. Using the surgical guide, 4 (or 6) implants are placed at the pre-planned positions. Primary stability check on each implant - torque of minimum 35 Ncm is required to allow same-day prosthesis.

12:00 - Impression for temporary prosthesis. Impression or scan of implants in the mouth; the patient takes a 2-3 hour break while the lab technician makes the temporary prosthesis in the lab (many advanced clinics have an in-house CAD-CAM lab so everything happens in the same building).

15:00 - Temporary prosthesis placement. The temporary acrylic prosthesis (fixed, doesn't move) is screwed onto the implants. Bite, aesthetic and comfort checks. Minor adjustments.

16:30 - Final talk and discharge. The patient gets detailed instructions for the next 2 weeks: diet (soft food for 14 days), hygiene, medication, follow-up appointments. The patient goes home with fixed teeth.

"Fixed teeth in one day" - truth or marketing

This is a marketing phrase that is partly true, partly half-truth. The truth is that the patient leaves the clinic with fixed teeth the same day. But those are temporary teeth - an acrylic prosthesis designed to allow the patient to speak, eat soft food and function normally during the 3-6 months until the implants fully integrate (osseointegration).

After 3-6 months, the temporary prosthesis is replaced with a final prosthesis that is more durable - made of stronger materials, with better aesthetics and more precise occlusion. The final prosthesis lasts 10-20 years depending on material and patient habits.

Difference between temporary and final:

Temporary (same day): Acrylic with metal reinforcement. Functional but less durable. Aesthetics good but not perfect.
Final (after 3-6 months): Zirconia, titanium-acrylic or high-density polymer. Maximum durability and aesthetics. Permanent solution.

Final prosthesis materials - what to choose

The biggest question in All-on-4 is: what to make the final prosthesis from? Several options exist:

Acrylic with metal reinforcement (most economical). Cheapest. Aesthetics solid, but acrylic can crack, and teeth wear faster than with stronger materials. Lifespan 7-12 years. A good option for older patients or those on a limited budget.

Titanium-acrylic with composite teeth. Better durability, similar aesthetics. Easier repair if something breaks (a tooth can be replaced individually). Lifespan 10-15 years.

Monolithic zirconia bridge (premium). The strongest option. The entire prosthesis is one piece of zirconia with a ceramic veneer for aesthetics. Practically indestructible, superior aesthetics, lifespan 15-20+ years. The most expensive, but longest-lasting.

PMMA polymer (mid-range). High-density polymer - light, doesn't crack, comfortable in the mouth. Good aesthetics, average lifespan 10-12 years. A cost-quality compromise.

Our recommendation - for patients seeking the best long-term solution, zirconia is an investment that pays back. For patients over 70, titanium-acrylic is a sensible economic option.

Recovery and what to expect in the first weeks

Although the patient leaves the clinic with fixed teeth, recovery isn't instantaneous. The first weeks require patience and attention:

First 24-48 hours. Facial swelling is normal and can last 3-5 days. Cold compresses 10 minutes per hour during the first day reduce swelling. Pain is controlled with Nimesil or Brufen (Ketonal for severe pain). Mild bleeding for the first few hours is normal. Soft food only (yoghurt, soups, purées).

First week. The patient learns to speak with the new prosthesis - slight lisping for 7-10 days is common and resolves spontaneously. Sutures are removed 7-10 days post-op. Hygiene is done gently - soft brushing, rinsing with a saline-baking soda solution 3-4 times a day.

Second week to first month. Swelling fully resolves. The patient can transition to all softer forms of normal food - cooked meat, pasta, well-cooked vegetables. Hard items (nuts, hard bread, fruit pits) should be avoided for 2-3 more months.

Third to sixth month. Osseointegration (implant-bone fusion) takes 3-6 months depending on individual factors. During this period, the temporary prosthesis is worn normally. After this - placement of the final prosthesis.

After the final prosthesis. Life with fixed teeth on implants is almost identical to life with natural teeth. The patient can eat everything - including hard items they couldn't have with a full denture for years.

Cost in Serbia - what to expect and why it varies

The cost of All-on-4 / All-on-6 in Serbia ranges quite widely, which often confuses patients. Realistic figures in 2026:

All-on-4 (one jaw) with acrylic prosthesis: €4,000 - €6,000
All-on-4 (one jaw) with zirconia: €6,500 - €9,500
All-on-6 (one jaw) with acrylic prosthesis: €5,500 - €7,500
All-on-6 (one jaw) with zirconia: €8,500 - €12,000
Both jaws (full mouth) with zirconia: €16,000 - €24,000

Reasons for the wide price range:

Implant system quality. Premium systems (Nobel, Straumann) are more expensive than mid-range (Alpha Bio, MIS) - but all have good clinical documentation if correctly placed.
Final prosthesis material. Zirconia is 30-50% more expensive than acrylic.
Additional procedures. If sinus lift or bone augmentation is needed, this adds cost and time.
Clinic technology. In-house CAD-CAM lab, intraoral scanner, surgical guides - all raise precision but also upfront cost.
Experience and specialisation of the clinician. A specialist with 15+ years of experience in oral surgery and implantology logically has a higher fee than a general dentist.

In our clinic we always provide a precise treatment plan with a fixed price before work begins. No "surprises", no "popping-up" extras during work. Details on our All-on-4 / All-on-6 service are transparently described on the service page.

What's included in the price - transparency

A good All-on-4 plan transparently covers all elements, so there are no "pop-up" costs:

Diagnostics and planning (CBCT, blood work, digital planning)
Surgical guide (if used)
The implants themselves (4 or 6 pieces, premium system)
Surgical intervention (anaesthesia, tooth extraction, implant placement)
Temporary fixed prosthesis (placed same day)
All check-ups during 3-6 months of osseointegration
Final prosthesis (zirconia or chosen material)
Impression/scan for the final prosthesis
Final prosthesis placement
All check-ups in the first year
Written warranty on implants (often lifetime)
Written warranty on the final prosthesis (5-10 years depending on material)

What is usually not included: general anaesthesia (if requested), treatment of parallel issues (such as periodontal care of remaining teeth), any additional interventions if unexpected issues arise.

Lifespan and what affects durability

All-on-4 statistics after 20 years of clinical research:

Implants: 95-98% functional at 10 years, 90-95% at 20 years.
Zirconia prosthesis: typically 15-20 years without major issues.
Acrylic prosthesis: 7-12 years, then renewed (teeth wear down).
Periodic replacement of prosthesis screws: every 5-10 years.

Main factors influencing lifespan:

Patient hygiene. The most important factor. Peri-implantitis (inflammation around the implant) can develop if hygiene is not maintained - the leading reason for long-term implant failure.
Smoking. Smokers have 2-3x higher implant failure risk.
Bruxism. Grinding forces overload implants and can fracture acrylic or ceramic.
Regular check-ups. Patient should attend every 4-6 months (not 12) - bone level around implants is monitored, biofilm is cleaned professionally from the prosthesis.
General health. New comorbidities (e.g. diabetes onset) change prognosis.

Home hygiene for an All-on-4 prosthesis

Even though the teeth are fixed, they can't be left to themselves. Quite the opposite - daily care is required:

Brushing twice a day with a soft brush (manual or electric). Particular attention to where the prosthesis meets the gums - biofilm builds up there.
Super-floss or interdental brushes once a day - threaded under the bridge to remove food that accumulates during the day.
Oral irrigator (see our guide to oral irrigators) is mandatory for All-on-4 patients. The pressurised water jet reaches around the implants where brush and floss physically can't.
Professional cleaning at the dentist every 4-6 months. The dentist removes the prosthesis (if screwed, not cemented), cleans it in an ultrasonic bath, checks all implants.
No hard-boiled eggs in shell, popcorn, fruit pits. Although you can eat anything, avoid extremely hard items that can fracture the prosthesis.

Myths and misconceptions about All-on-4

"All-on-4 is a new concept, not proven." On the contrary - the concept was developed in 1996 and has over 25 years of clinical practice and research. One of the best-studied protocols in modern implantology.

"Four implants is not enough for an entire jaw." The statistics say otherwise. Success rates are over 95% at 10 years, on par with classic implants.

"I can do All-on-4 cheaper for myself for €2,000." No. Permanently fixed teeth with a warranty cost reasonably - anything under €4,000 per jaw typically uses poor material, skimps on diagnostics, or has no warranty.

"Through implant tourism in Turkey all this costs €3,000." Legitimate clinics abroad with reasonable pricing exist, but patients often don't factor in: travel costs (2-3 trips over 6 months), inability to handle problems remotely (issues must be solved locally, extra cost), warranties that are effectively unenforceable.

"After All-on-4 I can eat everything as before." 90% of things, yes. But hard pits, hard-boiled eggs in shell, popcorn - no. Adaptation is needed.

"The implant can shift like a tooth." No. An implant is firmly fused with bone. If it shifts, it means there is inflammation around it - see the dentist urgently.

"With All-on-4 I can't preserve my bone." Chewing force is transferred to the bone through the implants, similar to natural teeth. This is actually better than a full denture (where bone atrophies because it doesn't receive stimulation).

Red flags - when NOT to agree to the work

Before signing an All-on-4 plan, watch for the following warning signs:

The clinic doesn't require a CBCT before work. Without a 3D scan, serious All-on-4 planning isn't possible. Any clinic not insisting on CBCT is a red flag.
"From" price without a detailed plan. "All-on-4 from €2,500" - and what exactly does that include? It often turns out final prosthesis, check-ups, possible complications are not included.
No written warranty. A serious clinic provides a written warranty on implants and prosthesis. Without it, the risk is yours.
"No name" implant systems. Ask which system they use. Premium (Nobel, Straumann) or mid-range (Alpha Bio, MIS, Implant Direct) are OK. "Generic" cheap Chinese implants - high risk.
Urgent pressure to decide same day. All-on-4 is a major investment. A serious clinic gives you time to think, get a second opinion, doesn't pressure.
No general health assessment. No questions about medications, diabetes, smoking, risk seriousness - that's a red flag.

Tips before your first consultation

To get the most from a consultation:

Bring a list of all medications you take, including "supportive" ones (supplements, hormones, high-dose vitamins). Bring older X-rays if you have any from previous clinics - saves additional imaging and gives history. Think about what matters most to you: cost, longevity, aesthetics, number of visits. Be honest about habits (smoking, alcohol, sleep quality, stress) - this directly influences protocol choice. Ask everything you want to know - exact cost of each step, what the warranty covers, what happens if something breaks in 5 years.

Conclusion - the single biggest dental decision

All-on-4 and All-on-6 have revolutionised edentulous-patient rehabilitation. For patients who wear a full denture or have lost most of their teeth, this is a solution that restores quality of life to a level no other approach can deliver. Fixed teeth, natural chewing, dramatically better aesthetics, confidence in speaking and smiling - all this for one capital investment that lasts 15-20+ years.

But it isn't for everyone. Bruxism, uncontrolled diabetes, heavy smoking, poor hygiene - all significantly reduce success rates. That is why the most important thing is an honest assessment before work. Better to know now you aren't an ideal candidate than to find out in 2 years when an implant starts failing.

In our clinic every All-on-4 / All-on-6 plan goes through strict diagnostics - CBCT, blood work, general health assessment, digital planning, written treatment plan with transparent pricing - and only then, when we are confident in the plan, do we proceed. With a written warranty and a long-term partnership for the coming decades.

If you are considering this solution, the first step is a consultation with a CBCT scan. The assessment takes 60-90 minutes and gives you a clear picture: are you a candidate, what does your specific case cost, how long does the process realistically take, what to expect. No obligation, no pressure - just an honest discussion and a written plan. If you decide to proceed afterwards, we begin. If not - minimal loss, maximum information.