When Granite Bay patients need a full arch of teeth replaced, two fixed implant solutions dominate the conversation: All-on-4 and All-on-6 dental implants. Both replace an entire upper or lower arch with non-removable, natural-looking teeth. Both free you from dentures. But they solve the engineering problem differently — and understanding that difference is the key to choosing wisely. Here is how a prosthodontist thinks about it.
First, What Each One Is
All-on-4 dental implants use four implants to support a full-arch bridge. The back two implants are placed at an angle, which lets them engage denser bone and often eliminates the need for bone grafting. It is the well-established, widely used approach for full-arch restoration.
All-on-6 dental implants use six implants — usually placed more vertically — to support the same kind of full-arch bridge. The extra two implants distribute biting forces across more points and add redundancy to the system.
Think of it this way: All-on-4 is the elegant minimal solution, engineered to do the job with four well-placed anchors. All-on-6 is the maximal-support solution, spreading the load wider. Neither philosophy is wrong; they suit different starting conditions.
The Deciding Factor: Your Bone
A prosthodontist’s first question is always about bone, because everything else follows from it:
- Limited or moderate bone loss: All-on-4’s tilted rear implants were specifically designed for this situation. Many patients who were told they “don’t have enough bone for implants” qualify for All-on-4 without grafting.
- Plentiful bone volume: All-on-6 becomes viable, since six implants each need solid anchorage. In this scenario both options are genuinely on the table.
- Severe bone loss: All-on-4 may still work; All-on-6 would likely require grafting first, adding months to treatment.
The in-house 3D CBCT scan at Expert Dental Group maps your bone in three dimensions — volume, density, nerve and sinus positions — so this decision rests on measurement, not guesswork.
Bite Forces and Grinding
If you clench or grind your teeth (bruxism), or simply have a powerful bite, the physics favor more support points. Six implants share each chewing stroke across more anchors, reducing the load any single implant bears. All-on-4 handles normal bite forces well — its track record is strong — but heavy grinders are a scenario where a prosthodontist often leans toward All-on-6, sometimes paired with a protective night guard for the final bridge.
What Changes on Surgery Day
Honestly, less than patients expect. Both procedures are performed under sedation with local anesthesia. Both typically allow a fixed temporary bridge the same day. All-on-6 surgery runs somewhat longer (two more implants to place precisely), and post-operative soreness may be marginally greater — but the recovery protocol is the same: soft foods during healing, check visits, and the final bridge after 3–6 months of osseointegration. Most patients return to desk routines within a few days either way.
The Long-Term View: Maintenance and Redundancy
Implants in both systems can last decades. The meaningful long-term difference is redundancy: with six implants, the bridge remains well supported even if one implant ever develops a problem. With four, each implant is more critical, which raises the stakes on precise initial planning and diligent maintenance — regular professional checkups, good home hygiene, and addressing grinding.
The bridge itself — the visible teeth — will need monitoring and eventual refurbishment in both cases after years of function. Neither option is “set it and forget it”; both reward the patients who keep their recall visits.
Cost Factors: An Honest Breakdown
All-on-6 generally involves a higher investment: two additional implants and components, longer surgical time, and more frequent need for grafting. All-on-4’s streamlined approach — four implants, often no grafting — typically costs less upfront.
But a prosthodontist urges patients to think in decades, not dollars on day one:
- Choosing All-on-4 when your bone and bite actually warrant six can cost more long-term if complications arise
- Choosing All-on-6 when four would have sufficed means paying for support you did not need
- The most expensive option is the one that has to be redone
This is why the consultation matters more than any price list. At Expert Dental Group, the free consultation includes the 3D scan analysis and a written plan with real cost factors for your case — call (916) 888-1646.
A Note on Who Plans Your Case
Full-arch implant treatment is among the most demanding procedures in dentistry — implant angles planned in 3D, bite forces engineered across the arch, and a bridge designed to look like it grew there. Dr. Leila Nikpour is a prosthodontist with more than 15 years of dentistry experience, 2,500+ dental implants placed, and a one-year implantology fellowship in France. Full-arch rehabilitation is core prosthodontic territory. Learn more on our /about-us/ page, or review our All-on-4 treatment page and dental implants overview.
Frequently Asked Questions
Which is better, All-on-4 or All-on-6?
Neither is universally better. All-on-4 suits limited bone and avoids grafting; All-on-6 suits plentiful bone and maximizes support. Your 3D scan and bite analysis determine the right fit.
Is All-on-6 more painful than All-on-4?
Not meaningfully. Both use sedation and local anesthesia. All-on-6 surgery is slightly longer, and soreness may be marginally greater, but recovery protocols are the same.
How long do All-on-6 implants last compared to All-on-4?
Both can last decades with proper care. All-on-6’s extra implants provide redundancy, but longevity depends most on planning quality, hygiene, and maintenance visits.
Will I need bone grafting for All-on-6?
Quite possibly, if your scan shows insufficient bone at any of the six planned sites. All-on-4’s angled design avoids grafting in many cases where All-on-6 would require it.
Can I eat normally with either option once healed?
Yes. Both restore far more chewing power than dentures. After the final bridge is placed and healing is complete, patients return to essentially normal diets.
Do Granite Bay patients travel to Roseville for this?
Yes, regularly. Full-arch treatment is a defined series of visits, and Granite Bay patients choose our Roseville office at 5070 Foothills Blvd for prosthodontist-level planning — the drive is minor next to a decades-long result.
Dr. Leila Nikpour is a Roseville prosthodontist with more than 15 years of dentistry experience and 2,500+ dental implants placed. Granite Bay patients comparing All-on-6 vs All-on-4: call Expert Dental Group at (916) 888-1646 for a free consultation (Mon–Fri 9–6, Sat 9–1), 5070 Foothills Blvd, Suite 2, Roseville, CA 95747.