Question 1

When is an external sinus lift necessary?

Accepted Answer

An external sinus lift becomes necessary when there is insufficient bone substance in the upper jaw to securely anchor dental implants. This is often the case when bone has been significantly resorbed after tooth loss or when the natural bone height is limited by the maxillary sinus. When the residual bone height is so low that an internal sinus lift is no longer sufficient, the external sinus lift is the method of choice.

Question 2

How does the external sinus lift differ from the internal one?

Accepted Answer

With the internal sinus lift, access is gained through the implant bed via a small drill hole, while the external sinus lift involves creating a lateral window in the jawbone. The external sinus lift is a more extensive procedure but allows for the treatment of larger bone defects. The choice of method depends on the available residual bone height.

Question 3

How is an external sinus lift performed?

Accepted Answer

During an external sinus lift, a lateral window is first created in the jawbone to gain access to the maxillary sinus. The sinus membrane (Schneiderian membrane) is gently lifted and the resulting cavity is filled with bone substitute material. Over several months, the body grows new bone into this material, creating a stable foundation for dental implants.

Question 4

How long does healing take after an external sinus lift?

Accepted Answer

After an external sinus lift, the bone typically requires 4 to 6 months to fully heal and regenerate. During this time, natural bone grows into the inserted bone substitute material and forms a stable structure. Only after this healing phase can dental implants be safely placed.

Question 5

Is an external sinus lift painful?

Accepted Answer

The external sinus lift is performed under local anesthesia, so you won't feel any pain during the procedure. After the procedure, mild swelling and discomfort may occur, which can be well controlled with pain medication. Most patients report that discomfort significantly decreases after a few days and the healing process is well tolerated.

External Sinus Lift in Vienna