All-on-X Dental Implants in Istanbul: All-on-4 vs All-on-6 vs All-on-8, Candidacy, Steps and Aftercare

What does All-on-X mean?

All-on-X is a full-arch implant concept in which one fixed bridge replacing all the teeth of a jaw is attached to a limited number of dental implants.

The "X" is simply a placeholder for the number of implants in that jaw. All-on-4 uses four implants, All-on-6 uses six and All-on-8 uses eight. Cleveland Clinic describes a full-arch implant restoration as multiple implants, usually four to six, supporting all of the upper or lower teeth, and explains that the term All-on-4 refers to a specific type of fixed implant denture that replaces an entire arch with just four implants.

You will also see the terms "All on X implants", "full-arch implants" and "hybrid dentures". Cleveland Clinic separates removable overdentures, which snap onto implants and are taken out daily, from fixed hybrid dentures, which you cannot remove at home but your dentist can take off for maintenance. All-on-X belongs to the fixed group.

All-on-4 vs All-on-6 vs All-on-8: what is the difference?

The main difference between All-on-4, All-on-6 and All-on-8 is the number of implants supporting the bridge, which in turn depends on how much healthy bone you have and how your bite is planned.

In the All-on-4 concept, the two back implants are usually placed at an angle (tilted). A systematic review by Soto-Peñaloza and colleagues describes all-on-four as a predictable way to treat the atrophic (shrunken) jaw in patients who prefer to avoid regenerative bone procedures, while noting that the quality of the evidence is still limited. All-on-6 and All-on-8 add more support points where the bone allows; they are not automatically "better".

For a deeper side-by-side, see the partner clinic's article on the difference between All-on-4, All-on-6 and All-on-8 and our sister site's All-on-4 vs All-on-6 vs All-on-8 comparison.

Who is a candidate for All-on-X dental implants?

A good candidate for All-on-X dental implants is an adult who has lost, or is about to lose, most or all teeth in a jaw, has enough healthy jawbone to anchor the implants, and is able to keep the area clean.

Cleveland Clinic lists conditions that need control first: untreated gum disease, some bone and autoimmune disorders, extensive decay, poor oral hygiene, severe bone loss and unmanaged diabetes; smoking or vaping can disrupt healing. Cambridge University Hospitals (NHS) adds that smokers have a much higher failure rate and that grinding can overload implants.

Bone loss does not automatically rule out All on X treatment. Tilted back implants are one way to work with reduced bone; grafting is another and, according to Cambridge University Hospitals, extends treatment by at least four months.

How does All-on-X treatment work? Step by step

All-on-X treatment at Taksim Clinics follows six stages: assessment, digital planning, preparation, implant surgery, a temporary fixed bridge, and the final bridge after healing.

1. Consultation. We examine your teeth, gums and bite and review your health and medicines.
2. Imaging and planning. Cambridge University Hospitals notes that X-rays, 3D CT scans and moulds may be used to plan surgery; we use a CBCT scan to plan implant positions.
3. Preparation. Teeth that cannot be saved are removed and infection is treated; grafting only where needed.
4. Implant placement. Under local anaesthetic, with optional sedation. Cleveland Clinic says you should not feel pain during surgery.
5. Temporary fixed teeth. The AAP notes temporary teeth may be worn over the implants; if the implants are not stable enough, healing caps are used first.
6. Final bridge. After the implants fuse with the bone, scans are taken and the final bridge is screwed in.

See also our step-by-step guide to dental treatment in Turkey useful.

Watch: dental implants in Istanbul, step by step

In this one-minute video, Dr. Abdurrahman Öztürk walks through the implant journey in Istanbul, from examination and 3D scan to the final teeth. All-on-X follows the same principles, with several implants planned together.

All-on-X timeline: how long does treatment take?

All-on-X treatment usually takes two visits separated by a healing period of several months, because the implants must fuse with the jawbone before the final bridge is fitted.

The medical sources give the healing window: Cleveland Clinic says the jawbone takes about three to six months to integrate implants supporting a full-arch denture, and three to nine months in general; the AAP describes two to six months. The durations below that are not in these sources are our clinic's indicative plan, which we adjust to each patient.

Which material is used for the final All-on-X bridge?

The final All-on-X bridge is most often made either as a metal-acrylic (acrylic hybrid) bridge or as a zirconia bridge, and each material has its own strengths and typical problems.

A 2023 narrative review in Dentistry Journal (Cinquini and colleagues) compared the two for full-arch implant bridges:

The review notes that most studies are small and retrospective, with no randomized trials. We choose the material with you based on your bite and grinding habits. Implants themselves are usually titanium; Cleveland Clinic notes some are ceramic and both are biocompatible.

All-on-X aftercare: how do you look after a fixed full-arch bridge?

A fixed All-on-X bridge is cleaned every day like natural teeth, plus special cleaning underneath the bridge, and checked regularly by a dental professional.

• Brush twice a day and clean under the bridge with floss threaders and interdental brushes, as Cleveland Clinic recommends.
• Keep regular professional check-ups, as the AAP advises.
• Avoid strenuous exercise for 48 hours after surgery (Cleveland Clinic).
• Eat soft food during healing, as our team advises.
• Do not smoke, and ask about a night guard if you grind your teeth.

For long-term gum care, our periodontics team in Istanbul can help with long-term gum care.

What are the risks of All-on-X dental implants?

The main risks of All-on-X dental implants are surgical complications such as infection or nerve injury, an implant that fails to bond with the bone, peri-implant disease over the years, and wear or breakage of the bridge.

• Surgical risks: Cleveland Clinic lists infection, nerve damage, injury to the mouth and sinus perforation.
• Numbness: very rare and usually resolving, according to Cambridge University Hospitals.
• Failure to integrate: occasionally an implant does not bond and has to be removed.
• Peri-implant disease: the AAP explains that peri-implant mucositis affects only the soft tissue and may be reversible if caught early, while peri-implantitis also involves bone loss around the implant and usually needs surgical treatment.
• Bridge complications: chipping, wear, fractures or loosened screws.

Warning signs: red, tender or bleeding gums around the implants, pus, a loose bridge or numbness that does not improve. The AAP lists previous gum disease, poor plaque control, smoking and diabetes as risk factors, and the all-on-four review reported peri-implantitis in a few patients after about two years.

All-on-X Turkey: why patients choose Istanbul, and what to check

Patients look at All-on-X Turkey options for experienced implant teams and digital planning; what matters most is careful planning and follow-up, not speed.

Ask who places the implants, whether CBCT is used, which bridge material is planned and how follow-up works after you fly home. Our guide on how to choose a dental implant clinic in Turkey lists more questions. Background reading: full mouth dental implants in Turkey from the partner clinic and on our sister site's page about full-mouth implant treatment in Turkey.

To see how AI supports full-arch planning, visit our sister clinic's page on AI-assisted full mouth dental implants in Istanbul.

Why plan All-on-X dental implants at Taksim Clinics?

Taksim Clinics is a dental clinic in Beyoğlu, central Istanbul, a short walk from Taksim Square and close to many hotels.

Every All-on-X plan starts with an examination and a 3D scan, and we explain why we suggest four, six or eight implants. A fixed temporary bridge is fitted only when the implants are stable enough. After you fly home, we stay in touch on WhatsApp.

Clinic location: Gümüşsuyu Mah., Mete Cad., Beyoğlu, Istanbul

Key takeaways

• All-on-X is a fixed full-arch bridge on a small number of implants; "X" is the number of implants per jaw.
• All-on-4, All-on-6 and All-on-8 are members of the same family; the choice depends on bone, bite and health.
• Healing usually takes several months before the final bridge; our two-visit durations are indicative.
• Daily cleaning under the bridge and regular check-ups help prevent peri-implantitis.

Conclusion: All-on-X dental implants, planned step by step

All-on-X dental implants can replace a removable plate with a fixed full-arch bridge. Whether you need All-on-4, All-on-6 or All-on-8 depends on your bone and bite. Careful 3D planning, enough healing time and daily cleaning matter most, and the Taksim Clinics team in Beyoğlu, Istanbul, will guide you through each step.