Sinus lifting modified BAOSFE technique

Title: Sinus lifting-modified BAOSFE technique Surgical Approach: 1. Dome shape instrument was used to detach sinus membrane from sinus floor. It is very important procedure to prevent perforation when the crestal approach is performing. 2. GBR procedure was done simultaneous with sinus lifting to make better crown/implant ratio and maintenance. OSTEON™ ll Collagen was applied as a graft material for simple procedure.