Ten patients with missing maxillary posterior teeth and maxillary sinus pneumatization in this study .the floor of maxillary sinus will be elevated using densah drill via surgical guide with simultaneous implant placement . patients will be received, clinically and radiologically examined, and managed at the Oral and Maxillofacial surgery Department, Faculty of Dentistry, Tanta University.
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CBCT for all patients
Timeframe: immediate and after 4 months