The trial is done in order to reinforce polyamide to improve its modulus of elasticity to be able to use it as a denture base material in all clinical cases

Inclusion Criteria:

1. Male or female patient with age range from fifty five to sixty five completely edentulous and in good medical condition
2. Patients have skeletal Angle's class I maxillo-mandibular relationship and sufficient inter arch distance.
3. Free from any systemic or neuromuscular disorder that might affect chewing efficiency of masticatory muscles.
4. Free from any tempro-mandibular disease.
5. Good oral hygiene.

Exclusion Criteria:

1. Neuromuscular disorder and orofacial disease.
2. Tempromandibular joint and muscle pain
3. xerostomia or excessive salivation.
4. Limited mouth opening