Hydrodynamic Piezoelectric Technique in Internal Sinus Lift

Inclusion Criteria: * Patients with edentulous free end or bounded posterior maxilla that require implant supported restoration. * Patients indicated to internal sinus lifting, where insufficient residual alveolar bone height from the alveolar crest to the floor of the maxillary sinus is found. * Patients with residual alveolar bone height that ranges from 5-7 mm according to the tomographic radiographic examination. * A good standard of oral hygiene. Exclusion criteria: * Patients with residual alveolar bone height less than 5 mm according to the tomographic radiographic examination. * Patients with residual alveolar bone height more than 8 mm according to the tomographic radiographic examination, which is not indicated to sinus lifting. * Patient with active sinus infection or sinus pathology. * History of Oral or intravenous bisphosphonate therapy or any treatments with other medications that may interfere with bone metabolism within the past 12 months. * Heavy smokers. * Medically compromised patients that are burdened with systemic conditions that contradicts implant placement and interfere with wound healing. Exclusion Criteria: \-