Why enough bone decides success
A dental implant is an artificial root set into the jawbone. For it to last, it must be surrounded by enough bone. Only then does the bone grow firmly onto the implant surface, allowing the implant to support a crown or bridge securely later on. Where bone is missing all around, the implant lacks its hold.
Two measurements matter: the height of the bone, meaning how deeply the implant can be anchored, and the width of the ridge, so that the implant is covered by bone on all sides. If either falls short, augmentation is the precondition for an implant to be sensible and stable in the long term. You can read more about implant treatment itself on our page about dental implants.
Why bone is lost
Jawbone is not static tissue. It responds to whether it is loaded or not. The most common reasons for bone loss are:
- After a tooth extraction, the ridge shrinks. Without the root that previously loaded it, the bone lacks stimulus and resorbs particularly strongly in the first year.
- Periodontitis, an advanced gum inflammation, destroys the bone around the teeth over time.
- A long edentulous period, where a gap is left untreated for years or covered only by a gum-borne denture, also leads to loss.
- Inflammation or cysts in the jaw can destroy bone locally.
The sooner a gap is restored, the more bone is preserved. This is precisely why the timing of the implant matters, as we explain in our article on immediate versus delayed implants.
The main augmentation methods
Which method is suitable depends on how much bone is missing and where. The three most common approaches are:
Guided bone regeneration with a membrane
For smaller to moderate defects, we fill the area with graft material and cover it with a membrane. This membrane acts as a barrier. It keeps the faster-growing soft tissue away so the slower-growing bone can re-form undisturbed. The procedure can often be carried out in the same session as the implant.
Block graft
Where greater width or height is missing, a block graft can be fixed in place to serve as a stable scaffold. It is positioned so that it fuses firmly with the existing bone, creating the volume an implant needs. This method is used for more extensive defects.
Ridge preservation right after extraction
The simplest way to keep bone is to forestall its loss. With ridge preservation, we fill the empty socket with graft material immediately after the tooth is removed. This largely preserves the bone volume and often makes a later, larger augmentation unnecessary.
The sinus lift explained
In the upper back jaw, in the area of the molars, the maxillary sinus sits directly above the tooth roots. After these teeth are lost, the sinus expands downwards and the remaining bone often becomes too shallow to anchor an implant securely. This is where the sinus lift helps. The membrane lining the sinus is gently raised and the space created is filled with graft material. This creates the necessary height.
There are two variants:
- Internal (closed) sinus lift. When only a little height is missing, we raise the floor of the sinus through the implant channel itself. This gentle approach can often be combined with the implant in the same procedure.
- External (open) sinus lift. When considerably more height is missing, access is gained through a small window in the side wall of the jaw. This allows more material to be placed. Depending on the starting situation, the implant is set at the same time or only after healing.
Both procedures are a firm part of our oral surgery repertoire.
Which materials are used
Graft material usually serves as a scaffold into which your own bone grows, gradually replacing it. The usual options are:
- Your own bone (autologous). Taken from the jaw. It is considered reliable because the body accepts its own tissue particularly well.
- Animal origin (xenograft), usually bovine. Processed material that serves as a stable, slowly resorbing scaffold.
- Synthetic material. Manufactured industrially, with no animal or human origin.
Which material fits depends on the defect and on your preferences. We discuss the options with you on a factual basis.
At the same time or in two stages
Whether augmentation and implant coincide is decided by primary stability: if the implant can be anchored firmly in the existing bone, we build the missing bone up around it in the same procedure. If the bone is too weak for that, we build it up first, let it heal and place the implant afterwards. The two-stage approach takes longer but creates a secure foundation.
Healing times depend on the extent. Small grafts heal within the normal implant healing period of around three to six months. Larger grafts and an external sinus lift often need four to nine months.
Risks and how we plan
Bone augmentation and sinus lift are established, well-planned procedures. As with any surgery, there are risks, such as swelling, post-operative bleeding or, in rare cases, an infection or partial failure of the graft to integrate. With a sinus lift, the delicate sinus membrane can tear, which can usually be repaired during the same procedure.
We reduce these risks by taking a three-dimensional scan before every procedure. It shows the height and width of the bone, the position of the sinus and the course of important nerves to the millimetre. On this basis we plan the augmentation and the implant position precisely, before the first incision is made.
Costs and next steps
The cost of bone augmentation depends on the method, the extent and the material. We bill according to the SSO tariff and provide you with a written cost estimate before any treatment, so you have full clarity. Bone augmentation and sinus lift are not an end in themselves but the precondition for a stable implant. Whether augmentation is needed in your case is only shown by an examination with a 3D scan. If you would like to know what is right for you, book an appointment. We look at your situation and discuss the right steps with you.
To weigh up whether an implant or a bridge makes more sense for you, see our comparison of implant versus bridge.