This study aims to evaluate retention ,chewing efficiency and masticatory performance of flexible versus CAD/CAM partial dentures opposing to fixed implant retained restorations.

in this study 22 patients will be selected following inclusion and exclusion criteria. The patients will be divided randomly into two groups.

Group I patients will receive Versacrylic removable partial denture. group II patients will receive CAD/CAM removable partial denture all patients will be given the home care instructions at night and brush cleaning of the dentures.

Measurements of retention using universal testing machine, masticatory performance using T-scan III computerized system and chewing efficiency using chewing function questionnaire

Inclusion Criteria:

• Non-smoker male Patients
• Age ranging from 40-50 years.
• Highly cooperative and motivated patients.
• Patients Systemically free from any immunosuppressive diseases.
• Patients free from Diabetes, Hypertension, Cancer, any mental or physical diseases.
• Patients not receiving any Radiotherapy or chemotherapy treatment.

Exclusion Criteria:

• Female patients
• Smoker patients.
• Age exceeding 50 years
• Uncooperative and unmotivated patients.

each patient was not informed about material of received prosthesis