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 (45-55) completely edentulous and in good medical condition.
2. All patients have skeletal Angle's class I maxillo-mandibular relationship and have sufficient interarch distance.
3. Free from any systemic or neuromuscular disorder that might affect chewing efficiency of masticatory muscles.
4. Free from any tempro-mandibular joint disorder.
5. The patients have good oral hygiene.
6. The edentulous ridges should be covered by firm healthy mucosa.
7. Healthy and co-operative patients.

Exclusion Criteria:

1. Patients with bad habits as severe clenching or bruxism, drug or alcohol addiction, moderate or heavy smoking (greater than 10 cigarettes per day).
2. Previous history of radiotherapy or chemotherapy.
3. Any skeletal problem dictates surgical intervention.
4. Patients having hormonal disorders as diabetes, thyroid or parathyroid hormonal diseases were not included.
5. Patient with xerostomia or excessive salivation.
6. No intraoral soft and hard tissue pathosis.
7. Psychiatric problems.