The upper molars and premolars are located just below the sinuses. When these teeth are absent, the sinus swells, takes up space and there is not enough bone height to put an implant.
It is therefore necessary to proceed with a sinus filling:
The dentist gently removes the sinus membrane to create a pocket.
This pocket is filled with bone material.
The space thus maintained, the renewal of bones will be able to be realized.
Sinus filling and implant placement can sometimes be performed at the same time. Otherwise, it will be 6 months before the bone is formed.
The different filling materials
There are different sinus filling materials:
Materials of human origin: these are bones from areas of higher wisdom teeth or the area of the chin (made in dental offices) of the scalp or hip (performed in hospital).
Materials of animal origin: these are bone tissues from cattle.
Materials of synthetic origin: these are mixtures of phosphate and calcium sometimes mixed with the patient's bone.