All-on-4 implants replace a full arch of teeth using just four strategically placed implants. Two are positioned in the front of the jaw and two are angled toward the back to maximize contact with available bone. The result is a fixed, non-removable set of teeth that functions like a natural arch.
Replacing a full arch of missing teeth used to mean dentures. All-on-4 changed that. Four precisely positioned implants can support an entire row of permanent teeth. No removable plate. No adhesive. No slipping when you eat or speak.
For patients who’ve been wearing dentures for years, or who are facing the loss of most of their teeth, this is often the option that finally feels like a real solution.
Key Takeaways
- Four strategically placed implants support a full arch of fixed, permanent teeth
- The two rear implants are angled to use denser bone, often eliminating the need for bone grafts
- A temporary set of teeth can typically be placed on the same day as surgery
- With proper care, the titanium posts are designed to be a permanent solution
How All-On-4 Implants Work
Traditional implants use one post per tooth. All-on-4 takes a different approach: four implants strategically positioned in the jaw support an entire arch of 10 to 14 teeth.
Two of the four implants go in the front of the jaw, where bone density is highest. The other two are placed toward the back at an angle of about 30 to 45 degrees. That tilt lets them reach denser bone further from the sinus cavity in the upper jaw, or the nerve canal in the lower jaw. It’s also what allows many patients to skip bone grafting entirely.
The prosthetic arch is screwed directly to the four implants. It doesn’t come out. It functions like teeth. You brush it, eat with it, and live your life with it in place.
All-On-4 vs. Traditional Implants
Here’s how the two approaches compare for full-arch cases:
| All-On-4 | Traditional implants (full arch) | |
|---|---|---|
| Implants needed | 4 per arch | 6 to 8 or more per arch |
| Bone graft usually needed | Often not | Frequently yes |
| Same-day teeth | Yes (temporary) | Rarely |
| Best for | Full arch tooth loss | Individual or multiple missing teeth |
| Final prosthesis | Fixed, non-removable | Fixed, non-removable |
All-on-4 is not a replacement for individual implants when you’re only missing one or two teeth. It’s a full-arch solution for patients dealing with significant or total tooth loss.
Who Is a Good Candidate?
Good candidates are adults who are missing most or all of the teeth in one or both jaws, or whose remaining teeth are failing and beyond saving. Because the rear implants are angled to reach denser bone, many patients who would need bone grafts for traditional implants can still qualify for All-on-4.
You may be a good fit if you’ve been wearing full or partial dentures and want something permanent, or if you have several failing teeth that need to come out. The angled implant design works in bone that traditional implants can’t use, which opens up the treatment to a broader group of patients.
Some factors can affect candidacy. Active gum disease needs to be treated first. Heavy smoking reduces healing success. Uncontrolled diabetes can slow bone integration. These aren’t automatic disqualifiers, but they’re part of the evaluation.
A consultation with 3D imaging is the only way to know for certain. The imaging maps bone volume, nerve position, and sinus location before any implant positions are finalized.
The All-On-4 Process, Step by Step
Here’s what the treatment involves from start to finish:
- Consultation and 3D imaging. Bone volume, sinus position, and nerve location are mapped precisely before anything is placed.
- Surgery. Four titanium implants are placed in the positions and angles determined from imaging. This is done under local anesthetic, with sedation available.
- Temporary prosthesis. A temporary arch is attached to the implants the same day. You leave the office with functional teeth.
- Healing. Bone gradually fuses with the implants over 3 to 6 months. Soft diet during this phase.
- Final prosthesis. Once the implants are fully integrated, a custom permanent arch is fabricated and fitted.
The temporary prosthesis is functional but built for the healing period. The final prosthesis is crafted to fit precisely after bone integration is confirmed.
How Long Do All-On-4 Implants Last?
With proper care, the titanium implant posts are designed to be permanent. Studies show high success rates beyond 15 years. The prosthetic arch itself may need replacement or adjustment over time as the jaw changes slightly with age, but the implant foundation is intended to last a lifetime.
Good oral hygiene is the main variable. All-on-4 prostheses need daily brushing, regular professional cleanings, and routine check-ups. They’re not maintenance-free, but they’re far less demanding than dentures.
Smoking is the most significant risk factor for long-term failure. Patients who smoke are advised to quit before and after treatment. If you’re dealing with significant tooth loss and want to understand whether full-arch implant treatment is the right option, schedule a consultation with Dr. Kitts at our Edmonds office. He’ll review your imaging and walk through exactly what your treatment plan would look like. We handle every step of the process from start to finish.
