Question 1

When is an internal sinus lift necessary?

Accepted Answer

An internal sinus lift is necessary when there is insufficient bone height in the upper jaw posterior region for a dental implant. The procedure is suitable when at least 4 mm of residual bone height remains and only a few millimeters are missing for a stable implant. In cases of greater bone loss, an external sinus lift is usually required.

Question 2

What is the difference between internal and external sinus lift?

Accepted Answer

In an internal sinus lift, the sinus membrane is elevated through the implant drilling hole – it is a minimally invasive procedure without a lateral bone window. The external sinus lift requires a larger surgical access from the side and is used in cases of more severe bone loss. The internal sinus lift is gentler, heals faster, and usually allows simultaneous implant placement.

Question 3

Is an internal sinus lift painful?

Accepted Answer

The procedure itself is painless thanks to local anesthesia. After the procedure, mild swelling and pressure sensation may occur, but these can be well controlled with common pain medications. Most patients find the internal sinus lift much more comfortable than expected, as it is a minimally invasive procedure.

Question 4

How long does healing take after an internal sinus lift?

Accepted Answer

Initial wound healing takes about 7-10 days, during which you should avoid forceful nose blowing and physical exertion. Complete integration of the bone substitute material and implant typically requires 3-6 months. After that, the implant can be fitted with the final crown.

Question 5

Can the implant be placed directly during the internal sinus lift?

Accepted Answer

Yes, with sufficient residual bone height of at least 4 mm, the implant can usually be placed simultaneously with the internal sinus lift. The implant also helps stabilize the augmented bone area. In cases of very low bone height, sometimes only the bone augmentation must be performed first, before the implant is placed in a second step.

Internal Sinus Lift Vienna: Upper Jaw Bone Augmentation