Onlay bone graft in Turkey: what it is and how it works
An onlay bone graft is a bone-building operation in which a block of bone is fixed on top of, or against the outer side of, a jaw ridge that has become too thin or too low to hold a dental implant. The block is held in place with small titanium screws and covered with the gum. Over several months the graft fuses with the host bone, and the new, wider ridge can then take an implant. Dental hospitals in Turkey offer onlay grafting as a separate stage before implants or, in selected cases, at the same visit as implant placement.
The idea is simple, but it is a technically demanding operation because the graft needs a stable fit, good blood supply from the host bone and a gum covering without tension. This guide explains how the procedure works, what the evidence says, what it costs compared with the UK, US and Germany, how long healing takes and what to ask before you travel. For other options see our dental treatments in Turkey.
Why does the jaw lose bone, and when is an onlay graft considered?
Bone in the jaw is kept by the teeth. After a tooth is lost, the socket bone gradually shrinks, mostly in width first and then in height. Gum disease, an old denture, trauma, a cyst or tumour removal and a long period without a tooth all speed this up. When the ridge is a knife-edge or has a deep dip, an implant of normal diameter would have a thin wall of bone on one side, and that side can recede or the implant can become exposed.
An onlay graft is considered when the problem is mainly the horizontal width or the vertical height of the ridge. It is not the usual answer for a socket that has just been emptied (a socket graft is used there) or for the back of the upper jaw, where the problem is the sinus floor rather than the ridge itself.
How is an onlay bone graft done, step by step?
The operation is normally carried out under local anaesthesia, with sedation if you are anxious, and takes about 60 to 120 minutes depending on the number of sites. The surgeon lifts a gum flap to expose the ridge and makes tiny holes in the host bone surface so blood can reach the graft. A bone block, shaped to match the defect, is placed and secured with one or two fixation screws, and the gaps are packed with bone chips. A barrier membrane may be placed over the graft. The gum is then released so that it can be closed over the graft without pulling, and stitched.
The screws are removed, or the implants placed through the grafted bone, at a second visit, usually four to six months later. Planning this second stage with your hospital is part of the package conversation, because it decides how long you must stay or whether you must travel twice.
Where does the bone for an onlay graft come from?
There are four common sources, and a surgeon should explain which they propose and why.
- Your own bone (autograft) from the chin, the angle of the lower jaw or the ramus behind the molars. This is often called the reference standard because living bone cells and growth factors are included, and it integrates reliably. The price is a second surgical site inside your mouth, with possible bruising and temporary numbness of the chin or lip.
- Bone from a donor (allograft), processed and sterilised in a tissue bank, available as blocks. It avoids a second site but is slower to turn into your own bone.
- Animal-derived bone (xenograft), usually from cattle, in granules or blocks. It acts as a scaffold that your bone slowly replaces.
- Synthetic material, such as calcium phosphate blocks, used in smaller defects.
For large vertical defects some surgeons take bone from the hip or the skull, which means a general anaesthetic and a hospital stay. Ask whether your case really needs this or can be solved with a smaller graft.
Does an onlay bone graft work? What the evidence says
For horizontal ridge widening, block grafts held with screws are well documented, and implant survival in grafted bone is generally reported as similar to that in natural bone when healing is uneventful. The evidence is less clear for large vertical gains, where bone resorption of the graft during healing is common and results are less predictable. Systematic reviews also note that the technique depends strongly on the surgeon and on soft-tissue handling. In practice that means the plan must be individual: a bone scan (CBCT) is needed, not just a panoramic X-ray, and the surgeon should describe the expected gain in millimetres and the chance that more bone work may be needed.
A trustworthy clinic will not promise a precise amount of bone, nor a guarantee that the graft will never be lost. A small share of grafts partly resorb or fail, and you should hear this at the consultation.
Onlay graft cost in Turkey compared with the UK, US and Germany
The ranges below are approximate prices for the graft operation alone, not for the implants or crowns that follow. They are not hospital quotes. The hospital confirms its own price after reviewing your CBCT scan.
| Country | Approximate cost range (one site) |
|---|---|
| Turkey | €350 – €1,500 |
| United Kingdom | €1,200 – €3,500 |
| United States | €1,500 – €4,500 |
| Germany | €1,000 – €3,000 |
The price depends on the size and number of sites, the donor source (an own-bone graft from the chin or ramus costs more than a granular substitute because of the second site), the membrane and screws, the type of anaesthesia and whether implants are placed on the same day. A package should list the CBCT scan, the operation, medication, follow-up checks and, if included, airport transfers and accommodation. Ask for the price of the second stage (screw removal and implants) in the same document.
Onlay graft, particulate graft or sinus lifting: which one fits?
Onlay blocks are one of several ways to rebuild bone. The table compares them with the two options patients are most often offered.
| Option | Best suited to | Typical limits |
|---|---|---|
| Onlay block graft | Thin ridge or moderate loss of width, sometimes height | Needs a donor site for own bone; soft tissue must close without tension |
| Particulate graft with membrane (guided bone regeneration) | Smaller defects, bone around an implant, sockets | Less volume held in large vertical defects |
| Sinus lifting | Lack of height in the upper back jaw below the sinus | Does not widen the ridge; sinus membrane may tear |
Which one you need depends on where the bone is missing. Moving a lower wisdom tooth or removing a cyst may be part of the same plan; see our page on wisdom tooth removal if a tooth near the graft site has to come out first. Severe jaw-shape problems that affect the bite are handled differently, for example with orthognathic surgery.
Who is a good candidate, and who should wait?
Good candidates are healthy adults with a measurable bone deficiency, no active gum infection, good oral hygiene and the wish for fixed implants. You should wait or consider other options if you smoke heavily and cannot stop, have uncontrolled diabetes, take bisphosphonate or similar bone drugs, have had radiotherapy to the jaw, or have untreated periodontal disease. These factors reduce blood supply and slow integration, and the surgeon may ask for tests or a letter from your doctor first.
How long does it take to recover, and how many days in Turkey?
Swelling and bruising peak at 48 to 72 hours and settle in about a week. You eat soft, cool food, avoid brushing the graft site directly and use the prescribed antibacterial rinse. Stitches come out after 10 to 14 days. Most people return to desk work in two to four days. A partial denture or retainer that presses on the graft is usually adjusted or left out for several weeks.
Most patients stay four to six nights so the surgeon can check the wound and remove early stitches if needed. The bone itself needs four to six months to mature before implants. Ask whether the clinic offers a second visit with implants at that point, and who will check the graft if a problem arises at home.
What are the risks of an onlay bone graft?
Common effects are swelling, bruising, soreness and temporary numbness near the donor or graft site. Less common problems include opening of the wound edges with exposure of the graft, infection, partial loss of the graft, loosening of a fixation screw and damage to a nerve, which can leave long-lasting numbness in the lip or chin. Because of these risks the procedure should be carried out by a trained oral and maxillofacial surgeon or an implant surgeon with graft experience. The NHS and professional bodies such as the American Academy of Periodontology advise a full assessment of bone, gum health and general health before bone grafting.
How to choose a clinic and what to ask
Check that the surgeon performs bone grafts regularly and works from a licensed hospital with CBCT imaging, that you receive a written plan with a sequence and dates, and that the price covers the second stage. Red flags include quotes without a scan, guaranteed bone gain, pressure to place implants straight away when your bone is clearly insufficient, and no plan for complications. Read how our process works and send your scan through the free quote page for a written plan.
- Where will the bone come from, and how much will be needed?
- Is a CBCT scan required, and can I send the one I already have?
- Will implants be placed at the same time or after healing?
- What happens if the graft is exposed or fails?
- What does the price include, and what is the second-stage price?
- Who reviews my healing after I return home?
Hospitals with Dental Treatments in Turkey
Frequently asked questions
An onlay bone graft is a block of bone fixed with small screws onto a thin or low jaw ridge to widen or raise it. After several months it fuses with your bone, so that a dental implant can be placed securely.
For widening a thin ridge it is well documented, and implants in healed grafts generally do as well as in natural bone. Large vertical gains are less predictable, because some graft volume can be lost during healing.
Approximate ranges are €350 to €1,500 per site in Turkey, against about €1,200 to €3,500 in the UK. The price depends on size, donor source and anaesthesia. The hospital confirms its price in a written quote.
The area is numbed during the operation. Afterwards most people have soreness, swelling and bruising for a few days, usually controlled with simple painkillers. A chin or ramus donor site can feel tight for longer.
Soft tissue settles in about one to two weeks, with stitches removed after 10 to 14 days. The graft itself needs four to six months to mature before implants are placed.
It can come from your own jaw (chin or ramus), from processed human donor bone, from animal-derived bone or from synthetic material. Your own bone integrates most reliably but needs a second surgical site.
They solve different problems. An onlay graft widens or raises the ridge, while a sinus lift adds height in the upper back jaw below the sinus. Your scan shows which one, or both, you need.
The wound edge can open and expose the graft, the graft can become infected or partly resorb, and nerve irritation can cause numbness of the lip or chin. Choosing an experienced surgeon and following aftercare lowers these risks.
Once the graft has fused and an implant is loaded, the new bone is maintained by the implant. Gum health, smoking and regular check-ups strongly influence how well it lasts over the years.
Usually four to six nights so the surgeon can check the wound. The second stage with implants takes place four to six months later, so ask whether the hospital plans one or two trips.