The goal of this clinical trial is to learn which type of oral health education works best to help 12-18-year-old participants with fixed orthodontic appliances (braces) keep their mouths healthy. The main questions it aims to answer are:

Which method of oral hygiene instruction-video-based, written, or face-to-face education-is most effective in improving oral health?

Do these education methods help lower dental plaque and gum inflammation during orthodontic treatment?

Researchers will compare the three groups of participants who receive different types of oral hygiene training to see which method leads to the best oral health results.

Participants will:

Receive one of three types of oral hygiene instruction (video, written, or in-person).

Continue their regular orthodontic care and brushing routine.

Have their oral health checked at different times during the study to measure changes in plaque and gum health.

The study hopes to identify the most effective and practical way to teach young orthodontic patients to keep their teeth and gums healthy while wearing braces.

Inclusion Criteria:

1. Patients with fixed orthodontics aged 12 to 18 years
2. Patient cooperation to participate in the study and follow-up
3. Patients with no history of systemic and mental illnesses and no use of neuropsychiatric medications
4. Patients who are not participating in another study related to oral health
5. Patients who do not have caries or periodontal problems at the beginning of orthodontic treatment (GI, PI, and BOP indices are less than 10%)
6. Patients whose brackets have been placed by an orthodontist (specialized department and special clinic) and under the bonding principles mentioned in the text books.

Exclusion Criteria:

1. Patients who are not cooperative.
2. Patients with systemic diseases and cleft palate and syndromes affecting the study results and health indicators.
3. Patients with caries or periodontal problems with significant Clinical Attachment Loss (GI, PI and BOP indices are more than 10%)
4. Patients using medications that affect plaque adhesion, such as mouthwashes
5. Patients with a history of long-term antibiotic use
6. Smokers
7. Patients with dental anomalies
8. Patients with mental and physical problems that prevent oral hygiene
9. Patients with dental impaction
10. Patients with a treatment plan that includes extraoral appliances