Different Drilling Techniques in Posterior Maxilla

Inclusion Criteria: * Patient with missing one or more posterior maxillary teeth. * Patients in the age group between 18 and 50 years old. * 10 mm or more vertical bone height is present. * No gender preface in selection of the patients. * Good oral hygiene. * Non-smokers. * Patients willing to be present during the study follow up intervals. * Patients free from any systemic diseases. * 6 mm or more ridge width is present. * Crown height space of at least 8 mm. •!Patients without any para-functional habits (bruxism and clenching). Exclusion Criteria: * Patients with any pathological lesion or root tips at the planned surgical site. * Patients with systemic diseases that contra-indicate the surgical procedure or affect bone healing process such as uncontrolled diabetes mellitus, bleeding disorders. * serious osseous disorders, and mental disorders. * Patient taking drugs that could affect bone healing process as in * Immunosuppressive drugs and bisphosphonates. * Alcoholism. * Untreated periodontal disease or bad oral hygiene. * Pregnancy.