Stability, Marginal Bone Loss and Occlusal Load Analysis of PEEK Abutment Supported on Short Implant

Inclusion Criteria: * 1\. Age range of patients 30-45 years old, with no gender prediction, able to read and sign the informed consent. 2. Patient with missing posterior tooth indicated for replacement with short implant as there are any anatomical limitation (near maxillary sinus or inferior alveolar nerve) or atrophic ridge. 3. Opposing natural teeth should be present. 4. The edentulous ridge should be free from any infection or remining root. 5. Patient should be able to tolerate surgical procedure of implant procedures physically and psychologically. 6. Patient should be willing to return for follow-up examination and evaluation. Exclusion Criteria: * 1\. Patients with active periodontal diseases. 2. Patient with poor oral hygiene and motivation. 3. Pregnant women. 4. Patient with unrealistic expectations. 5. Patients with parafunctional habits and smoker. 6. Patient with systemic disease and immunocompromised patients which will prevent surgical procedure. 7. Recent extraction or extraction socket with infection or remining root.