Evaluation of Tenting the Schneiderian Membrane of the Maxillary Sinus Using Titanium Mesh.

Inclusion Criteria: * Adult male/female patients with age interval 18:60 years old. * Patients with one or more teeth requiring implant supported dental restoration in atrophic maxilla. * Alveolar bone height less than 5 mm at the defective site. * Good oral hygiene. * Patient's consensual agreement to be enrolled in the study. Exclusion Criteria: * Medically compromised patients with conditions contraindicating surgery (eg. uncontrolled diabetics, bisphosphonate intake, radio or chemotherapy). * Patients with active infection at or related to the site of surgery (eg. acute sinusitis). * Heavy smokers. * Patients not indicated for an implant supported restoration at the time of enrollement (eg. active/untreated periodontal disease). (Patients developing any medical condition that interferes with the outcomes after enrolment in the study will be excluded).