Various attempts have been implemented using different materials and techniques to augment the maxillary sinus floor enhancing autogenous bone formation to allow proper dental implant positioning. The aim of this study is to evaluate the sinus lift procedure using polytetrafluoroethylene (PTFE) titanium-reinforced membrane to maintain the space formed after Schneiderian membrane elevation followed by immediate implant placement.

Inclusion Criteria:

• Patients of both genders requiring implant placement in posterior maxilla
• Age range: 40-60 years.
• Good oral hygiene
• Healthy maxillary sinus free from pathology
• The minimum crestal bone height is (4-6) mm
• Patients who are willing and fully capable to comply with the study protocol.

Exclusion Criteria:

• Sinus infection
• Tumors or pathologic lesions in sinus
• Severe allergic rhinitis.
• Chronic topical steroid use.
• Radiation therapy.
• Psychologic / mental impairment
• Acute infection (periodontitis or mucosal infection
• Patients on radiotherapy or chemotherapy.
• Alcohol or drug abuse.
• Patient with systemic disorder (uncontrolled Diabetes mellitus, autoimmune diseases, bone diseases, etc.)
• Smokers
• Parafuctional habits