Retention of CAD Metallic and Poly Ether Ether Ketone (PEEK) Frameworks

comparing retention of CAD CAM metallic and Poly Ether Ether Ketone (PEEK) partial dentures in Kennedy class I casses

Inclusion Criteria:- Patients with bilateral free end saddles in the mandible (kennedy class I) with last standing abutment premolar.2- Opposing dentition is fully intact or restored. 3- Sufficient inter-arch space. 4- Angle's class I maxilla-mandibular relationship.Exclusion Criteria:Periodontal affection of the abutment teeth.Skeletal mal-relation.Unmotivated patients to maintain adequate oral hygiene to follow up.Patients with neuromuscular and Psychiatric disorders.Systematic disease affecting bone and periodontal health.Insufficient inter-arch space.Patients with physical reasons that could affect follow up.