Primary Stability of Implant in Closed Sinus Lifting Cases Using Densah Bur Versus Osteotome

Inclusion Criteria: * Both males as well as females without any active periodontal disease. * All patients were in a good health with no systemic diseases. * All selected patients were non-smokers and non-alcoholics. * Patient were free from T.M.J troubles, abnormal oral habits such as bruxism. * The edentulous ridges were covered with optimal thickness of soft tissue. * Remaining natural teeth had good. * Periodontal tissue support and occlusion showed sufficient inter arch space. * On the local level, patients with maxillary sinus diseases and unfavorable inter maxillary relationship were excluded. Exclusion Criteria: * Patients with residual bone height less than 6mm. * Patients with systemic disease that may affect bone quality. * Patients with poor oral hygiene and active periodontal diseases. * Patient with limited mouth opening.