Two groups of patients with posterior vertical deficient maxillary alveolar ridge with pneumatized sinus and needing dental implant . First group will be subjected to open sinus lifting using autogenous bone mixed with bone marrow aspirate concentrate cells from maxillary tuberosity and the second group will be subjected to open sinus lifting using autogenous bone mixed with bovine bone
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Radiographic assessment
Timeframe: 6 months postoperative