A pterygoid implant is a long implant tilted into the back of the upper jaw and anchored in the pterygoid region, behind the sinus. In some anatomies it can avoid a sinus lift or a posterior bone graft. It is specialist surgery, decided after a CBCT scan and exam, and compared with the alternatives.
A pterygoid implant is a long implant placed at the very back of the upper jaw and tilted so that it anchors in the pterygoid region, behind the sinus. In some anatomies it can support a prosthesis at the back of the jaw without a sinus lift or a local bone graft. It is neither a universal solution nor a shortcut: it is specialist surgery, decided on a CBCT scan and a clinical examination, and always weighed against zygomatic implants, subperiosteal implants, short implants or a graft.
What is a pterygoid implant?
The upper jaw extends backward as the maxillary tuberosity, which meets the pterygoid region, that is, the pterygoid process of the sphenoid bone. A pterygoid implant is placed at the back of the arch and angled backward and upward so that it rests on the bone of this deep region. It therefore does not depend on the height of bone available under the sinus.
This area is used because the back of the upper jaw is often the first place to run short of bone. After the back teeth are lost, the ridge shrinks and the sinus can expand downward, leaving too little height for a conventional implant. The usual strategies are then a sinus lift, shorter or tilted implants, or a deeper anchorage such as this one.
A pterygoid implant is usually combined with other implants placed further forward, which carry the same prosthesis.
If your real question is about thin or short bone, the pterygoid implant is only one answer among several. Our guide to dental implants without a bone graft compares conventional implants adapted to the remaining bone, short or narrow implants, tilted implants, zygomatic implants and subperiosteal implants.
Who may be considered a candidate?
It can enter the discussion when several conditions come together
- bone is lacking at the back of the upper jaw, typically under the sinus;
- the plan is a fixed prosthesis that needs support at the back;
- an extensive graft or a sinus lift is not wanted, or has already been discussed, after full information about the alternatives;
- the CBCT shows a pterygoid region with a compatible anatomy;
- mouth opening is wide enough for the instruments;
- general health and oral hygiene are compatible with advanced surgery, and follow-up visits can be kept.
It generally has no place when the bone at the back allows a well-positioned conventional implant: a simpler solution is then preferable. Age alone does not decide anything; anatomy, health, hygiene and the ability to attend follow-ups matter more.
Pterygoid, zygomatic or subperiosteal: what is different?
These three approaches come up in the same conversation because they are studied when an extensive graft of the upper jaw is not desirable. They do not rest on the same principle, however.
| Criterion | Pterygoid implant | Zygomatic implant | Custom subperiosteal implant |
|---|---|---|---|
| Anchorage area | Pterygoid region, at the back of the upper jaw | Zygomatic bone (cheekbone), long trajectory | Surface of the remaining bone, planned fixation points |
| Principle | Long tilted implant, often combined with front implants | Long implant crossing part of the upper jaw | Framework designed on CBCT, placed under the gum |
| Typical situation discussed | Lack of bone at the back, under the sinus | Severe atrophy of the upper jaw (maxilla) | Selected severe atrophy, adequate soft tissue |
| Relationship with the sinus | Anchored behind the sinus, trajectory planned around it | Trajectory closely related to the sinus, depending on the approach | No zygomatic anchorage; depends on the anatomy of the jaw |
| Specific cautions | Deep, poorly visible site, positioning, cleaning of the prosthesis | Sinusitis, oroantral communication, malposition, rare but serious anatomical complications | Exposure, infection, wound opening (dehiscence), problems with fixation or revision |
| Scientific track record | Varies by publication and by the exact technique and protocol | More developed clinical literature, but heterogeneous | Contemporary data, more limited long-term follow-up |
This table describes principles, not a ranking. The choice depends on the anatomy of the sinus, the pterygoid region and the zygoma, the soft tissue, the prosthetic plan, your general health and the team’s experience. To go deeper on the other two options, read subperiosteal vs zygomatic implants and subperiosteal implants: risks, candidacy and process.
How is the decision made, and what happens next?
Whether you are considering pterygoid implants in Istanbul, elsewhere in Turkey or at home, the reasoning should follow the same order
- Interview and clinical examination: medical and ENT (ear, nose and throat) history (sinus infections, nasal obstruction), smoking, diabetes, teeth grinding (bruxism), infections, remaining teeth, mouth opening, hygiene.
- CBCT scan covering the back of the upper jaw, the sinus and the pterygoid region, with an ENT opinion before going further if needed.
- Prosthetic plan first: position of the future teeth, space, bite, access for cleaning. Surgery follows from the prosthesis, not the other way around.
- 3D planning and choice of technique, with a backup plan if the real anatomy differs from the simulation. See CBCT and 3D planning for dental implants.
- Surgery, under anesthesia suited to the technique, its extent and your general health.
- Prosthesis: a fixed temporary prosthesis can sometimes be placed early, and the final one follows after healing. Immediate loading remains a separate decision, made according to the stability obtained.
- Follow-up: check-ups, hygiene, prosthesis maintenance and a plan for what to do in an emergency after you return home.
If you are traveling, the plan should be confirmed in person before the operation. Ask in writing how many stays are planned, whether the first prosthesis is temporary, and which check-ups can be done in your own country.
Limits, risks, alternatives and reasons to postpone
The risks to know about
As with any implant surgery, placement can be followed by pain, swelling, bleeding, infection or delayed healing. An implant may also fail to integrate; the prosthesis can have a loosened screw or a fracture; and peri-implantitis can appear over time.
This technique adds its own cautions: the site is deep and poorly visible, positioning is demanding, the proximity of the sinus has to be controlled, and the prosthesis must remain accessible for cleaning. It calls for a team used to this type of surgery.
No success rate will be quoted here. A published percentage only means something if it specifies the technique, the number of patients, the definition of success and the length of follow-up; individual risk cannot be put into numbers without a diagnosis.
When to postpone or rule out this treatment
An active mouth or sinus infection, an unstable general condition, poorly controlled diabetes, heavy smoking, uncontrolled teeth grinding, insufficient hygiene, limited mouth opening, an unfavorable anatomy or the impossibility of attending follow-ups can lead to postponing or ruling out the operation. These factors are not all absolute contraindications: they change the level of risk and are assessed case by case.
Alternatives to discuss first
| Alternative | Principle | Key limit |
|---|---|---|
| Conventional, short or adapted-diameter implants | Use the bone that is actually available | Not suitable for every severe atrophy |
| Tilted implants | Spread the support points while avoiding certain anatomical areas | Depends on the stability obtained and the prosthetic plan |
| Sinus lift | Create bone volume under the sinus | An additional procedure, with its own risks and waiting time |
| Bone graft | Rebuild bone before or during placement | One or more stages, sometimes a donor site |
| Zygomatic or subperiosteal implant | A different anchorage or a custom structure | Advanced surgery, with specific risks |
| Stabilized removable denture or no replacement | Restore function another way, or leave the gap | Variable stability and comfort |
Each alternative shifts the balance of benefits and risks. You should be able to understand why a less invasive option is not enough before consenting to advanced surgery.
Questions to ask before accepting a plan
- [ ] What diagnosis explains the lack of bone, and which examination is it based on?
- [ ] Why are a conventional implant, a sinus lift or a graft not suitable?
- [ ] Where exactly does the implant anchor, and does the CBCT show it?
- [ ] Has my sinus been evaluated, and is an ENT opinion needed?
- [ ] What documented experience does the team have with this technique?
- [ ] Who operates, and who designs and makes the prosthesis?
- [ ] What happens if the expected stability is not achieved during surgery?
- [ ] Is the prosthesis temporary or final, and can the dentist detach it for cleaning and maintenance?
- [ ] Does the quote itemize surgery, implants, abutments, temporary teeth, final prosthesis, imaging, anesthesia and check-ups?
- [ ] What documents and follow-up will I receive for when I return home?
Asking for an opinion from Istanbul or from a distance
If you have been offered pterygoid, zygomatic or subperiosteal implants, or told that bone is missing at the back of your upper jaw, you can send your panoramic X-ray, your CBCT if you have one, and any earlier reports. The clinic’s oral and maxillofacial surgeon, Assoc. Prof. Dr. Türker Yücesoy, can say whether the documents are usable and which examinations are missing.
This first reading is only an orientation: the definitive plan is decided after a clinical examination, and no decision is expected at this stage. To compare a proposal received elsewhere, see second opinion for dental implants.
Sources
- ITI Consensus Database: recommendations and consensus statements in implant dentistry.
- European Association for Osseointegration: resources and consensus reports.
- PubMed: biomedical literature, to be searched technique by technique (pterygoid, zygomatic and subperiosteal implants), as findings differ between them.
This page is an information guide: it does not make any diagnosis remotely and does not replace a clinical examination.
Frequently asked questions
What is a pterygoid implant?
It is a long implant placed at the far back of the upper jaw and tilted so that it rests in the pterygoid region, behind the sinus. It supports a prosthesis when there is not enough bone under the sinus, usually together with other implants placed further forward.
Can a pterygoid implant help me avoid a sinus lift or bone graft?
Sometimes, depending on your anatomy, but not always. In some jaws it avoids a sinus lift or a posterior graft, while an additional procedure may still be needed. The exact plan, including any grafting, can only be confirmed after a CBCT scan and a clinical examination.
Pterygoid or zygomatic implants: which one is right for me?
Neither is superior in absolute terms. A zygomatic implant anchors in the cheekbone and is mainly discussed for severe bone loss, whereas a pterygoid implant anchors at the back of the upper jaw. The choice depends on your anatomy, your sinus, the prosthetic plan and the team's experience.
Is a pterygoid implant the answer for thin or short bone without a graft?
Not systematically. Thin or short bone can sometimes be treated with short, narrow-diameter or tilted implants. A pterygoid implant mainly concerns the back of the upper jaw and needs a compatible anatomy there; only a CBCT scan can settle the question.
What are the risks of pterygoid implants?
The risks of any implant surgery apply: pain, swelling, bleeding, infection and implant loss. This technique adds cautions linked to a deep, poorly visible site: positioning, proximity to the sinus and cleaning access for the prosthesis. No reliable percentage can be given without a diagnosis.
Can I have fixed teeth on the day of surgery?
A fixed temporary prosthesis is sometimes considered early, depending on the stability achieved during surgery, how the support is distributed and your bite. The decision is made during the operation, and the plan should include a transition solution if loading has to be delayed.
Can I get an opinion on pterygoid implants from a panoramic X-ray or CBCT?
A panoramic X-ray or CBCT sent remotely gives a first orientation, not a final decision. The clinical examination, the state of the sinus and the prosthetic plan can all change the proposal. The definitive plan is confirmed in person, after an examination.
How much do pterygoid implants cost?
There is no single price for this technique. The cost depends on the number and type of implants, the prosthesis and the stay. Ask for a written quote, itemized line by line, issued after a CBCT scan and a clinical examination.
This guide informs; it does not replace a consultation or an individual diagnosis. Every case needs a clinical examination and 3D imaging.
