the goal of this clinical trial is to know if TMJ lavage does change the condyle position in patients diagnosed with unilateral anterior disc displacement with reduction. The main questions it aims to answer are:

• Is the condyle position in anterior disc displacement with reduction joints are the same in normal joints?
• Does TMJ lavage will affect the condyle position, or affects the contralateral condyle position? Researchers will compare condyle position in unilateral anterior disc displacement with reduction to the normal joint using CBCT before and after lavage to see if any changes in position will occur in even side.

Participants will:

Make CBCT for both condyles before lavage and after three months post lavage. Visit clinic after two weeks, one month, and three months to evaluate the clinical data.

Inclusion Criteria:

• • Unilateral anterior disc displacement with reduction according to Helkimo's clinical dysfunction index including (Covert et al., 2021a).:

  1. Impaired range of movement.
  2. Impaired TMJ dysfunction.
  3. Muscles pain.
  4. TMJ pain.

Exclusion Criteria:

• • Bilateral anterior disc displacement with reduction.

  • Previous fracture in TMJ.
  • Any pathological lesion in TMJ.
  • Congenital craniofacial anomalies.
  • Any previous surgical procedure in TMJ.
  • Any medically compromised patient (mental deficiency, osteoporosis…)
  • Previous arthrocentesis in TMJ.
  • Partial or complete edentulous patients.
  • Any psychological patient.