Periodontitis
Conditions
Interventions
Sponsors
Eligibility
Inclusion criteria
Inclusion criteria: 1.Patients requiring extraction of first or second premolars for orthodontic reasons. 2.Aged 18-22 years, regardless of gender.
Exclusion criteria
Exclusion criteria: 1.Clinical examination and X-ray images indicate abnormal root development of the premolar and its adjacent teeth (one mesial and one distal), or the presence of significant caries, pulpitis, apical periodontitis, or periodontitis. 2.Patients with systemic diseases, infectious diseases, or those who are pregnant or lactating. 3.Individuals with mental or intellectual impairments.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Gene expression level; | — |
Countries
China
Contacts
Beijing Stomatological Hospital , Capital Medical University