All-on-4 vs All-on-6 vs All-on-X: What's the Difference?
All-on-4, All-on-6, and All-on-X are all full-arch dental implant procedures that replace an entire row of teeth with a fixed, permanent prosthesis. The core difference is the number of implants used. All-on-4 uses exactly 4 implants per arch. All-on-6 uses 6 implants. All-on-X is a flexible approach where the number of implants — typically 4 to 6 — is determined by your specific anatomy and bone density.
At Texas Dental Implant Center in Houston, Dr. Michel Azer — a board-certified periodontist — uses the All-on-X approach. Rather than forcing every patient into a fixed 4-implant or 6-implant protocol, he determines the ideal number based on your 3D scan, bone volume, and long-term prognosis. Permanent All-on-X teeth start at $16,999 per arch.
Side-by-Side Comparison
| Feature | All-on-4 | All-on-6 | All-on-X (TDIC Approach) |
|---|---|---|---|
| Number of implants | Exactly 4 | Exactly 6 | 4–6 (customized) |
| Fixed or removable | Fixed (permanent) | Fixed (permanent) | Fixed (permanent) |
| Same-day teeth | Yes — temporary teeth day of surgery | Yes — temporary teeth day of surgery | Yes — temporary teeth day of surgery |
| Bone grafting needed? | Often avoided (angled implants) | May be needed for extra implant sites | Depends on anatomy — avoided when possible |
| Best for | Patients with moderate bone loss | Patients with good bone density | All patients — customized to anatomy |
| Prosthesis support | Good | Stronger distribution of force | Optimized for each patient |
| Cost at TDIC | Starting at $16,999/arch | Starting at $16,999/arch | Starting at $16,999/arch |
How Each Approach Works
All-on-4
Four implants are placed in the jawbone — two straight in the front and two angled in the back. The angled rear implants allow the surgeon to reach stronger bone further back in the jaw, which often eliminates the need for bone grafting. A fixed prosthesis is attached to all four implants. This protocol was developed by Nobel Biocare and has decades of clinical data behind it.
All-on-6
Six implants provide more points of support across the arch. The additional implants distribute bite force more evenly, which some providers prefer for patients with good bone density. The trade-off is that more implant sites may require more bone, and the surgical procedure is slightly longer.
All-on-X
The number of implants is chosen based on your bone anatomy — not a brand protocol. Dr. Azer uses 3D imaging to determine whether 4, 5, or 6 implants will give you the strongest, most durable result. Some jaws are better supported by 4 implants with angled placement. Others benefit from 5 or 6. The decision is clinical, not marketing.
Why We Use the All-on-X Approach
"All-on-4" and "All-on-6" are brand-driven protocols — they were developed by specific implant manufacturers and marketed accordingly. They're effective, but they apply a fixed number to every patient regardless of anatomy.
Dr. Azer's philosophy is different. He starts with your 3D scan and determines the optimal number of implants for your specific bone structure. If 4 implants provide the best support, you get 4. If your anatomy supports 6 and would benefit from the additional force distribution, you get 6. The treatment is built around you — not around a brand name.
The result is the same: a full arch of permanent, fixed teeth that you never remove. The difference is that your implant plan is based on science and imaging, not a one-size-fits-all formula.
Zirconia vs Acrylic Prosthesis
Regardless of how many implants are placed, the final prosthesis (the teeth) comes in two main materials:
Acrylic (PMMA)
Lighter weight, lower cost, and easier to repair if damaged. Standard option for temporary teeth and a common choice for final prostheses. May need replacement sooner (7–10 years).
Zirconia
Extremely durable, stain-resistant, and natural-looking. Heavier than acrylic but much harder to chip or break. Typically lasts 15–20+ years. Premium option.
Both materials are available at TDIC. Dr. Azer discusses the trade-offs at your consultation.
Not Ready for Permanent? Consider Implant-Supported Dentures
If permanent fixed teeth aren't in your budget right now, implant-supported dentures offer a middle ground. Starting at $12,999 per arch, a snap-on overdenture clicks onto 2–4 implants for significantly more stability than traditional dentures — at a lower cost than permanent All-on-X.
Many patients start with implant-supported dentures and upgrade to permanent teeth later. The implants are already in place — only the prosthesis changes.
Learn About Implant-Supported DenturesCustomized by a Board-Certified Periodontist
Dr. Michel Azer doesn't sell a brand name — he designs implant plans based on 3D imaging and clinical expertise. His training as a board-certified periodontist from Boston University, combined with guided surgery technology, means every All-on-X case is planned to maximize implant success and long-term durability. Many of his patients are referred by general dentists across the Houston area.
Meet Dr. Azer →Frequently Asked Questions
Ready to Restore Your Smile in Houston?
Your consultation is free. It includes a 3D CBCT scan of your jaw, a one-on-one with Dr. Azer, and a full treatment plan with cost breakdown — no obligation, no pressure.
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