periodontal diseases
Conditions
Interventions
Sponsors
Eligibility
Inclusion criteria
Inclusion criteria: 1. increasing space of the anterior teeth in the recent 3 years; 2. no more than 3 molars were lost, the pulp vatality of the anterior teeth is normal, with opposing teeth; 3. systmic health, with no periodontal treatment during the last 6 months, with no antibiotics during the last 3 months.
Exclusion criteria
Exclusion criteria: 1. pregnant or lactation women; 2. possible drugs that cause gingiva hyperplasia; 3. trauma of anterior teeth.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| probing depth; | — |
Secondary
| Measure | Time frame |
|---|---|
| space change between teeth; | — |
Countries
China
Contacts
Peking University School and Hospital of Stomatology