Patients will be selected from the outpatient clinic of Removable Prosthodontic Department. Faculty of Dental Medicine for Girls, Al-Azhar University..

Each patient will be assessed for eligibility and Informed consent will be obtained from patient after explanation of the treatment protocols and expected outcomes or alternative management.

All 10 patients will receive upper complete dentures and lower complete overdentures. The upper complete denture will be mucosa supported and the lower complete denture will be supported and retained for all patients by two dental implants in the inter-foraminal region. Patients will be divided into two groups, one group will be loaded by Novaloc attachment. While the other group will be loaded by Equator attachment. Implants will be functionally loaded after three months of insertion.

Inclusion Criteria:

• All patients' ridges should be covered with firm mucosa which is free from any signs of inflammation or ulceration.
• Patients should be free from any bone disorder and exhibit adequate height and width of the residual alveolar ridge.
• All patients must have sufficient inter arch space.

Exclusion Criteria:

• Patients with oral or systemic diseases.
• Patients with xerostomia or excessive salivation.
• Patients with parafunctional habits (bruxism or clenching).
• Heavy smoker or alcoholic patients.
• Patients with history of temporo-mandibular dysfunction.
• Patients with brain disorders or psychiatric disorders.