Malocclusion
Conditions
Interventions
conventional group :In the conventional group, conventional aligners are produced.
Each patient wil wear 6 passive aligners, 2 weeks per aligner and 22h per day.
modified group:In the modified group, two additional attachment cavities are added on lowrer anterior segment on the basis of conventional aligners,one on each quadrant, and are filled with glass ion
Sponsors
Second Clinical Division, Peking University School and Hospital of Stomatology
Eligibility
Sex/Gender
All
Age
18 Years to 40 Years
Inclusion criteria
Inclusion criteria: 1) adult (age = 18 years old); 2) have a need of orthodontic treatment with clear aligners; 3) mild or moderate crowding; 4) complete dentition except third molars; 5) average or low manbibular plane (S-N/Go-Me =37° and S-Go/N-Me = 69%)
Exclusion criteria
Exclusion criteria: 1) open bite or scissor bite; 2) severe overbite or crossbite with the teeth bite on the gingiva of the opposing arch; 3) existence of implant supported prothesis or bridge; 4) have tempromandibular disorder; 5) hace related systemic disease
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Occlusal distribution; | — |
Secondary
| Measure | Time frame |
|---|---|
| molar intrusion;lower 1/3 facial changes;self-assessment of occlusal comfort;positional change of mandible; | — |
Countries
China
Contacts
Public ContactDai Fanfan
Peking University, School and Hospital of Stomatology
Outcome results
None listed