Patient evaluation treatment planning for edentulous posterior maxilla
The SA-2 to SA-4 surgical procedures the sinus should be free of infection In addition, a thorough history and clinical evaluation of the maxillary sinus are conducted. Potential infection in the region of the sinuses may result in extremely severe complication Physical examination Radiography 
Conventional :OPG, water’s view CT MRI CT is currently the modality of choice Any sign of acute sinusitis, root tips, cysts or tumors complicate the procedure and mandate further evaluation Known diseases of the antrum should be treated before sinus grafts
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