orthodontic patients after treatment
Conditions
Interventions
Hawley's removable retainer group:To wear Hawley's removable retainer. There are four sub-groups divided according to the age and sex. The age is seperated two stages, adolescent whose the second mola
Transparent retainer group:The patients of this group wear transparent retainer. The age is seperated two stages, adolescent whose the second molars have articulated and less than 18 years old at the
Normal comparison observation group:This group can not be given any intervention measure and the values of this group are only taken as the standard of the values of other two groups. The subgroups ar
Sponsors
The department of orthodontics, the College of Stomatology of West China, Sichuan University
Eligibility
Sex/Gender
All
Age
No minimum to 30 Years
Inclusion criteria
Inclusion criteria: 1. Patient is resident and impossible to leave in two years; 2. When ended active orthodontic treatment, patient will receive periodontal treatment until the periodontia recovery, the color of the gingival returned normal and the blood of periodontal (BOP) index is negative. 3. The age: the minimum age is a stage that patient's second molars have been erupted and have occlusion when ended active orthodontic treatment. The maximum age is 30 years old.
Exclusion criteria
Exclusion criteria: 1. Whole body factors 1) Systematic diseases: Diabetes, AIDS, Osteoporosis, Leukemia; 2) Sex Hormone: pubertal gingivitis, gestational period gingivitis; 3) Genetic factor: gingival fibromatosis; 4) Medicine: Phenytoin, cyclosporine; 5) Habit disturbance: brygmus, the custom of biting hard-thing, smoking and being addicted to drink, unilateral mastication, mis-brushing habit, oral respiration. 2. Local factors 1) Severe periodontal disease; 2) Local in false dental prosthetic restoration; 3) Mis-designed partial prosthodontics; 4) Fixed prosthodontics; 5) born-missed teeth or abnormal extraction.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| PLI;Bite the number of the contact point; | — |
Secondary
| Measure | Time frame |
|---|---|
| GBI;ALI;Cl; | — |
Countries
China
Contacts
Public ContactYu Yongchun
Outcome results
None listed