Large ridge defect after invasive extraction

Major ridge defects, often caused by invasive extraction, are augmented with bone substitute (BioOss) and collagen membrane (BioGide). See also bucco-palatal ridge defect.

After an extraction/explantation with sinus perforation there often remains an osseous sinus floor defect. 
When opening a mucoperiostal flap the Schneider's membrane can be lacerated.   
The membrane is detached around the site of the rupture, elevated and covered with a collagen membrane like the coverage of an accidental rupture during sinus lift.


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