All-on-4 and All-on-6 Implant Treatment: Complete Guide

What Is All-on-4 Implant Treatment?

All-on-4 is a full-arch rehabilitation technique that replaces an entire row of missing teeth using just four strategically placed dental implants. A fixed prosthesis is attached to these implants, usually on the same day as surgery. The concept was developed to provide patients with a permanent, non-removable alternative to traditional dentures.

The "4" refers to the number of implants per jaw. Two implants are placed vertically in the anterior region, and two are placed at an angle (up to 45 degrees) in the posterior region. This angulation maximizes contact with available bone, often eliminating the need for bone grafting or sinus lifting in the upper jaw.

All-on-4 vs. All-on-6: What Is the Difference?

The All-on-6 protocol follows the same principle but uses six implants instead of four. The two additional implants provide extra support and are typically recommended when:

• The patient has moderate bone density

• Greater load distribution is desired for long-term durability

• The prosthesis design requires additional anchoring points

Both protocols deliver a full arch of fixed teeth. The choice between four and six implants is made based on 3D imaging and clinical assessment.

Who Is a Candidate?

All-on-4 treatment is designed for patients who:

• Are missing all teeth in one or both jaws and want a fixed, non-removable solution

• Wear full dentures and are dissatisfied with the fit, comfort, or function

• Have moderate bone loss that makes individual implant placement impractical but does not require zygomatic anchoring

• Want same-day results: The protocol is designed to provide temporary fixed teeth on the day of surgery

Patients with advanced bone loss in the upper jaw may benefit from combining All-on-4 with zygomatic implants for additional anchorage.

The Treatment Process Step by Step

1. Assessment and Digital Planning

A comprehensive oral examination is performed, including a CBCT scan. The 3D images allow the surgeon to evaluate bone volume, nerve canal positions, and sinus boundaries. Implant positions are planned digitally before surgery begins.

2. Guided Surgery and Implant Placement

Using guided implant surgery, a patient-specific surgical guide ensures that each implant is placed at the exact angle and depth determined during planning. This improves precision, reduces surgical time, and minimizes tissue trauma.

3. Same-Day Temporary Prosthesis

Within hours of implant placement, a temporary fixed prosthesis is attached. This prosthesis is functional and aesthetic, allowing the patient to eat soft foods and smile with confidence from day one.

4. Final Prosthesis

After 3-6 months of healing and osseointegration, the temporary prosthesis is replaced with the final restoration. Options include acrylic hybrid prostheses, zirconia bridges, and porcelain-fused-to-metal designs, each with different aesthetics, durability, and cost profiles.

Prosthetic Material Options

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The material selection is discussed during the planning phase based on patient preferences, functional needs, and budget.

Recovery Timeline

• Day 1-3: Moderate swelling and discomfort; soft diet, prescribed medications

• Day 4-7: Swelling decreases; return to light daily activities

• Week 2: Suture removal; transition to semi-soft diet

• Month 1-3: Gradual return to normal diet; follow-up appointments

• Month 3-6: Final prosthesis fabrication and placement

Most patients report a significant improvement in quality of life within the first week, particularly those transitioning from removable dentures.

All-on-4 for International Patients

For patients traveling to Istanbul for treatment, the typical stay is 7-10 days. The first visit includes the CBCT scan and clinical assessment. Surgery and temporary prosthesis placement occur within 1-2 days. Follow-up appointments are scheduled before departure, and the final prosthesis visit is planned 3-6 months later.

Dr. Aykut Gurel provides digital case planning for international patients, allowing preliminary assessment before arrival.

Frequently Asked Questions

Can I eat normally with All-on-4 implants?

During the initial healing period (first 2-3 months), a soft diet is recommended to protect the implants during osseointegration. Once the final prosthesis is placed, patients can eat virtually all foods, including those that are difficult with dentures such as apples, steak, and corn on the cob.

How long does the All-on-4 procedure take?

The surgical procedure takes approximately 2-3 hours per jaw. Including the temporary prosthesis fitting, patients can expect to spend 4-6 hours at the clinic on surgery day. The overall treatment is completed in two phases: surgery day and the final prosthesis appointment 3-6 months later.

Is All-on-4 better than individual implants?

Neither is universally better; they serve different clinical situations. All-on-4 is ideal for patients missing all teeth who want a fixed solution with fewer implants and shorter treatment time. Individual implants are preferred when only one or a few teeth are missing. Your surgeon will recommend the most appropriate option after clinical evaluation.

What happens if an implant fails in the All-on-4 system?

Implant failure is rare (less than 3-5% in published studies). If one implant fails during the healing phase, a replacement implant can often be placed. The prosthesis may be temporarily adjusted while the new implant integrates. The angulated design of All-on-4 provides built-in redundancy that supports the prosthesis even during intervention.

How much does All-on-4 treatment cost in Istanbul?

Cost varies based on the number of implants, prosthetic material chosen, and whether additional procedures like extractions are needed. Istanbul offers high-quality All-on-4 treatment at a fraction of the cost in Western Europe or North America. A personalized quote is provided after the initial assessment.