3 cases with dental implant entered into the maxillary sinus by accident during posterior maxillary dental implant surgery were reported in this work.The implants were localized by CBCT scanning and removed by endoscope assisted extraction through the refined Cald-well-Luc approach under local anesthesia.The results showed that all 3 implants were successfully removed,highlighting the efficacy of en-doscopic-assisted techniques in minimizing trauma,ensuring accurate positioning and providing a clear surgical field of vision.
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