Sinus augmentation

Sinus Augmentation



The most common reason for sinus augmentation (or sinus lift) is to prepare for an implant in the upper jaw (in the area of the molar and premolar teeth) – beneath the maxillary sinus (which is an air-filled cavity on either side of the nose).

When Sinus Augmentation is needed?

A patient might require sinus augmentation as an surgical intervention:

• If he or she has lost one or more teeth in the posterior section of the upper jaw or maxilla.
• If he or she has lost a good amount of bone in the posterior section of the upper jaw or maxilla.
• If he or she has teeth missing due to genetical or congenital defect.

Dental implants need bone structure to be placed and secured into. But the anatomy of the skull is such that the upper jaw may not have as much bone for this placement as the lower jaw does.

Furthermore, the floor of the maxillary sinus expands when the molar and premolar teeth are extracted or lost. This is because the integrity of the soft and hard tissue around the molar and pre-molar are lost when the tooth is removed. This loss of integrity allows for the maxillary sinus to expand. The shape and position of the sinus varies from person to person and can change with age.

So when implants need to be placed in the upper jaw, a sinus lift and bone graft may be required. This procedure creates more bony space for the implant to be secured into.

In order to create more bone volume for the implant, first the maxillary sinus lining needs to be lifted, and then a bone graft placed underneath. A periodontist will first cut the gum where your tooth once was to expose the bone. He/she will then ‘drill’ a small hole in the bone in order to access the internal lining of the sinus cavity. The sinus lining will then be pushed and lifted away and this created space is filled with granules of bone graft.

The tissue is then stitched back, and the area is left to heal (usually 6 months, the more bone graft used, the longer it takes to heal). Once fully healed and meshed with your bone, the implant is placed. The bone used for a bone graft is usually animal-derived or synthetic. This procedure may take up to two hours and is performed under local anaesthetics. Twilight sedation can be considered if the patient wishes.

Surgical Intervention Techniques For Sinus Augmentation Correction

• Traditional Sinus Augmentation or lateral window technique.
• Osteotome technique.

To know more about the corrective surgical techniques, call Precision Periodontics on (02) 8093 2680 or make an enquiry with us today.