To investigate the efficacy of osseodensification drills (Densah bure) as a new closed sinus lift tool and to compare the effect of it in bone gaine versus traditional osteotomes.

Inclusion Criteria:

• Patients with partially edentulous in the posterior area of the maxilla, with a residual ridge that allowed insertion of ≤8 mm length implants.
• both sexes.
• No intraoral soft and hard tissue pathology
• No systemic condition that contraindicate implant placement.

Exclusion Criteria:

• Sinus pathology.
• Heavy smokers more than 20 cigarettes per day.
• Patients with systemic disease that may affect normal healing.
• Psychiatric problems.
• Disorders to implant are related to history of radiation therapy to the head and neck neoplasia, or bone augmentation to implant site.