When most or all of the teeth in an arch are failing or already gone, All-on-X offers a way to restore a complete, fixed set of teeth without a removable denture. The concept is straightforward: an entire upper or lower arch is rebuilt on as few as four to six dental implants that anchor a non-removable prosthesis. At Kentfield Dental, Dr. Soroush Ghaffarpour ("Dr. G") coordinates your overall care from our boutique Kentfield office, while the surgical and prosthodontic work is provided in collaboration with Dr. Jonathan Winfield, a board-certified prosthodontist. Every case is planned in 3D with our in-house Vatech Green X12 CBCT scanner, so Marin patients get carefully mapped, aesthetics-first treatment with the final smile in mind from the very start.
What is All-on-X (All-on-4 / All-on-6)?
All-on-X is a full-arch tooth-replacement approach in which an entire upper or lower row of teeth is supported by a small number of dental implants — often four (All-on-4) or six (All-on-6), though the exact number depends on your bone and bite. The implants act as sturdy anchors for a single, fixed prosthesis that fills the whole arch. Unlike a conventional denture, this prosthesis is not removable: it's secured to the implants and stays in place while you eat, speak, and sleep.
Because the full arch rests on just a few well-positioned implants, All-on-X can often work even where bone has been lost, and it usually means fewer implants than replacing every tooth individually. The result is a stable set of teeth that doesn't rely on adhesives or cover the roof of your mouth the way many upper dentures do. It's designed for people missing all or most of their teeth in an arch, those with failing or hopeless remaining teeth, or anyone frustrated by a denture that slips. It is a significant treatment, and honest planning comes first to confirm it's the right fit.
How we approach All-on-X at Kentfield Dental
All-on-X depends on precise planning, and that's where our Kentfield office and our partnership shine. Dr. G begins by capturing a low-dose 3D image of your jaw with our Vatech Green X12 CBCT scanner, which reveals bone height, density, sinus position, and nerve location far better than a flat x-ray. That 3D view lets the team plan implant number, angle, and position around your actual anatomy rather than improvising on surgery day. The surgical placement and the prosthodontic design are provided in collaboration with Dr. Jonathan Winfield, a board-certified prosthodontist, while Dr. G coordinates your overall care, comfort, and follow-up. Because imaging and much of the lab work happen under one roof in Kentfield, Marin patients spend less time bounced between offices — and Dr. G, who speaks Spanish, keeps the whole process calm, clear, and unhurried.
- Vatech Green X12 CBCT — low-dose 3D imaging to map bone, sinus, and nerve before any surgery
- Surgical and prosthodontic expertise provided with Dr. Jonathan Winfield, board-certified prosthodontist
- Dr. G coordinates your overall care, comfort, and ongoing follow-up
- Formlabs in-house 3D printing for surgical guides, models, and provisional restorations
- 3Shape / Primescan 2 digital scanning instead of goopy impression trays
- Aesthetics-first planning with the final smile and bite designed from day one
Why patients choose us for this
A fixed set of teeth
The prosthesis is secured to the implants and stays put — it doesn't slip, click, or come out at night the way a removable denture can.
Restored chewing and confidence
A stable full arch lets many patients bite and chew far more comfortably and smile without worrying about their teeth shifting.
No messy adhesives
Because the teeth are anchored to implants, there's no need for denture pastes that loosen through the day.
Helps preserve jawbone
Like natural roots, the implants stimulate the jawbone, which can help slow the bone loss that often follows when teeth are missing.
Fewer implants than full singles
Restoring a whole arch on as few as four to six implants is typically more efficient to place and maintain than replacing every tooth individually.
Planned in 3D from the start
CBCT-guided planning maps implant position around your bone, sinuses, and nerves for a more predictable, conservative result.
What to expect
Consultation & 3D CBCT planning
We start with an exam and a low-dose Vatech CBCT scan in our Kentfield office. Dr. G reviews your bone, bite, and goals — and, with Dr. Winfield, the team maps how many implants you'll need and where, with the final smile in mind from the start.
Extractions & implant placement
Any failing teeth are gently removed and the implants are placed at carefully planned positions and angles, often using a surgical guide. This surgical step is provided in collaboration with Dr. Winfield, with comfort measures in place throughout.
Provisional fixed teeth, where suitable
When the bone and implant stability allow, a provisional fixed set of teeth can be attached so you leave with a complete-looking arch rather than a gap while everything heals.
Healing & your final prosthesis
Over the following months the implants integrate with the bone. Once they're solid, your final custom full-arch prosthesis is designed, fitted, and refined to look natural and function comfortably.
Is All-on-X right for you?
All-on-X can be life-changing for the right person, but it's a significant treatment, so honest evaluation comes first. It's most often considered for people missing all or most of the teeth in an arch, those with remaining teeth that are failing or hopeless, or denture wearers tired of slipping and adhesives. The key factors are your bone, your gum and overall health, and your goals — and a 3D CBCT scan answers most of those questions before any decisions are made. At a consultation in our Kentfield office, Dr. G will review your situation honestly and, together with Dr. Winfield, help you understand whether All-on-X, individual implants, or another option best fits your needs. There are no guarantees, only a clear, plain-English picture of what's realistic for you.
- You're missing all or most of the teeth in an upper or lower arch
- Your remaining teeth are failing or have a hopeless long-term outlook
- You're unhappy with a removable denture that slips, clicks, or needs adhesives
- You want a fixed, non-removable set of teeth rather than something you take out
- You're in reasonable general and gum health and ready for implant treatment
- You'd like 3D planning and coordinated care close to home in Marin County
In collaboration with Dr. Jonathan Winfield, board-certified prosthodontist. We're proud to offer All-on-X in collaboration with Dr. Jonathan Winfield, whose surgical and prosthodontic expertise complements Dr. G's coordinated, comfort-focused care. Together, the team plans each full-arch case with both the surgery and your final smile in mind. Visit Dr. Jonathan Winfield’s practice →
Frequently asked questions
All-on-X means an entire upper or lower arch of teeth is restored on a set number of dental implants — most commonly four (All-on-4) or six (All-on-6). The implants anchor a single fixed prosthesis that replaces the whole row of teeth, so it stays in place rather than being removed like a denture. The exact number depends on your bone and bite, which we confirm with a 3D CBCT scan.
No — that's the main difference. An All-on-X prosthesis is secured to the implants and stays fixed in your mouth; you don't take it out at night or use adhesives. You care for it daily as instructed and have it checked at regular visits, but it doesn't slip or click the way a removable denture can.
Often, when the bone and implant stability allow, a provisional fixed set of teeth can be placed so you leave with a complete-looking arch rather than a gap. The final, full-strength prosthesis comes later, after the implants have had a few months to integrate with the bone. Your CBCT scan and consultation determine whether a same-day provisional is realistic for you.
The surgical and prosthodontic work is provided in collaboration with Dr. Jonathan Winfield, a board-certified prosthodontist, while Dr. G coordinates your overall care, comfort, and follow-up. This partnership brings specialized full-arch expertise together with the familiar, personal care of our boutique Kentfield office.
Often, yes. Because the arch is supported by a few strategically angled implants, All-on-X can sometimes work where bone has been lost and individual implants would be difficult. In some cases a preparatory step like a sinus lift or grafting may still be recommended. Your 3D CBCT scan shows exactly what your jaw needs, and the team will explain it plainly before any decisions are made.
From planning to the final prosthesis, All-on-X typically spans several months, mostly to allow the implants to integrate with the bone. The active surgical visit is focused and well managed, and a provisional set of teeth can keep you looking complete in between. We'll give you a realistic, personalized timeline after your consultation and CBCT scan.
Kentfield Dental is a fee-for-service practice, so we're out-of-network with insurance plans. Many plans still reimburse a portion of implant treatment, and our team is glad to provide documentation and discuss your options. For specifics about your case, please call us at (415) 456-5402.