Implant placement in deficient posterior maxilla is a challenging clinical situation that necessitates appropriate treatment options to restore this area.

-Aim of the study: To compare allograft vs tenting technique in terms of implant stability and bone height.

Rationale for carrying out the trial:

The research population will be divided into two groups. Group1 will be treated by allograft with immediate implant technique, Group2 will be treated by tenting technique with immediate implant technique. Allograft has been effective in augmenting bone growth and has been proven to be a vital asset in sinus lifting.

Inclusion Criteria:

1. Patient with missing upper pre molar , molar teeth
2. Patients in need of bone grafting of the maxillary sinus to house an implant.
3. Patients with residual alveolar crest of at least 3-4mm in height and 5mm in width distal to the canine as measured on CBCT scan
4. Patients with adequate inter-arch space

Exclusion Criteria:

1. Patients suffering from any sinus pathosis.
2. Patients who are heavy smokers (>10 cigarettes/day).
3. Patient under psychiatric therapy or unrealistic expectations
4. Patients of systemic conditions that may interfere with carrying out the surgical procedure.
5. Lack of opposite occluding dentition/prosthesis in the area intended for implant placement
6. Severe bruxism or clenching
7. Poor oral hygiene (full mouth bleeding on probing and full mouth plaque index >25%)