Background: The placement of dental implant in the edentulous posterior maxilla often present difficulties as a result of insufficient bone due to pneumatization of the maxillary sinus and bone resorption after extraction. The lateral window Technique is usually accomplished by creating lateral bony window and elevation the sinus membrane. The new compartment created between the floor of maxillary sinus and the elevated membrane was filled either with autograft, bone graft substitutes or combination of them to maintain space for new bone formation. Recently, non grafting sinus floor augmentation was established based on the concept of membrane elevation and its support either by implants insertion (tenting Technique) or space maintaining devices (titanium screws or Mesh) have proven new bone formation both experimentally and clinically.
Aim: Evaluate the predictability of new bone formation at sinus floor after elevation of the membrane using a space maintaining mesh without graft material.
Patients and methods: Five patient (10 sinus lift) selected for implant placement in the edentulous posterior maxilla. Clinical examination, cast preparation, and radiographic examination (Panoramic, CBCT) was performed for all patients. Under local anesthesia, sinus membrane was elevated through lateral window technique and it was supported and maintained either with a titanium or resorbable Mesh: immediate post operative clinical and radiographic examination was performed to evaluate any signs of dehiscence, infection, membrane exposure. Six month post-operatively, core bone biopsy was performed for histological examination of the formed bone using a trephine drill at planned position of implant.
Results: None of the patients showed any signs of wound dehiscence, infection, or sinusitis. New bone formation was proven radiography, histologically and clinically during implant placement(a satisfactory initial stability) in both groups.
Conclusion: Both Titanium and resorbable meshes was reliable and predictable as a space maintaining devices after membrane elevation.