The goal of this observational study is to learn about the correlation between missing posterior teeth and vertical dimension cephalometric measurements with temporomandibular disorders in a sample of adult Egyptian subjects in. The main questions it aims to answer are:

• Is there a correlation between missing posterior teeth and temporomandibular disorders?

• Is there a correlation between vertical dimension cephalometric measurements and temporomandibular disorders? Participants will be asked for the following:-

  • to give their phone numbers & it will be collected through the orthodontic department patient's database ensuring complete confidentiality.
  • to fill Personal data chart (name, age, date of birth, mobile number, address).
  • to receive Clinical examination to determine number of missing teeth.
  • to receive Clinical examination to diagnose TMD using the DC/TMD.
  • to do Lateral cephalometric radiograph to measure the vertical dimension.

Inclusion Criteria:

• Male and female patients with 2 or more missing posterior teeth seeking treatment at the faculty.
• Age: 16-49 years.

Exclusion Criteria:

• - Patients who refuse to participate in the study.
• Patients younger than 16 years.
• Subjects who received previous TMD treatment.
• Subjects suffering from systemic conditions which may affect the functioning of TMJ, for example, rheumatoid arthritis, scleroderma, and septic arthritis.
• Subjects with a history of trauma to the maxillofacial area.
• Subjects with a previous history of maxillofacial surgery.
• Subjects with a history of malignancy or current malignancy of the maxillofacial area.

Adult Male and female patients with 2 or more missing posterior teeth seeking treatment at the faculty. Age: 16-49 years.