All-on-4 vs All-on-6 Implants: Which Is Right for You?

The Core Concept: Both Restore a Full Arch

All-on-4 and All-on-6 are both full-arch implant solutions: they replace all upper or lower teeth using a fixed prosthesis supported by a small number of implants.

The difference is in the engineering.

All-on-4: Four Points of Support

Developed by Nobel Biocare and pioneered by Dr. Paulo Maló, the All-on-4 technique uses four implants to support a full arch. Two implants are placed vertically at the front, and two are angled at 45° at the back — the angulation increases the spread of force and reaches denser bone, avoiding the need for bone grafting in most cases.

Advantages:

• Fewer implants mean lower surgical complexity
• Often possible even with significant bone loss (avoids grafting)
• Immediate loading — teeth fitted the same day
• Lower starting cost than All-on-6

Limitations:

• Four load points distribute force across fewer contacts
• If one implant fails, it has a greater effect on the entire arch
• Not ideal for patients with very high bite forces (severe bruxers)
• Long-term studies show slightly lower prosthetic survival rates vs. six-implant configurations

All-on-6: Six Points of Support

All-on-6 uses six implants — typically four straight and two angled — to support the same full-arch prosthesis. The additional two implants provide greater distribution of bite forces.

Advantages:

• More load points — each implant bears less individual force
• Better redundancy: if one implant has a complication, five remain
• Recommended for patients with high bite forces or bruxism
• Longer-term studies show higher prosthetic survival rates
• More natural force distribution, particularly in the posterior (molar) region

Limitations:

• Greater surgical complexity
• Requires slightly more bone volume
• Higher cost than All-on-4

Which Is Right for You?

The decision depends on clinical factors, not preference. Dr. Tarek's recommendation is based on:

• Bone density and volume (assessed via CBCT 3D scan)
• Bite force (bruxers are generally better served by All-on-6)
• Overall jaw anatomy
• Systemic health factors that influence healing

Most patients who can have All-on-6 should have All-on-6. The additional implant offers meaningfully better load distribution and long-term stability. Most patients who are told they need bone grafting before conventional implants are actually candidates for All-on-4.

The Same-Day Teeth Reality

Both systems offer immediate loading — meaning a fixed provisional prosthesis is fitted on the day of surgery. You do not leave the clinic without teeth.

The permanent prosthesis (zirconia or high-strength acrylic, depending on the case) is fitted after 3–4 months of healing, once osseointegration is confirmed.

Success Rates

Published clinical literature reports:

• All-on-4: 10-year implant survival: 94–96%
• All-on-6: 10-year implant survival: 96–98%

Both are excellent outcomes. The choice is a clinical one, not a quality compromise.

Starting the Conversation

Share your X-rays and CBCT scan with Dr. Tarek via WhatsApp. He will assess your bone volume, calculate the ideal implant configuration for your specific anatomy, and provide a detailed personalised treatment plan — within 24 hours. No commitment required.