Orthodontic Reduction of an Increased Overbite in Adolescents - the Mechanism and Rate of Occlusal Adaptation
Increased Overbite
About this trial
This is an interventional treatment trial for Increased Overbite focused on measuring orthodontics
Eligibility Criteria
Inclusion Criteria:
- Class II division 2 malocclusion
- No history of active orthodontic treatment
- Increased overbite (greater than one third lower incisal coverage)
- Age 9-16
Exclusion Criteria:
- Restorations on the palatal surface of the maxillary incisors
- Increased overjet where the lower incisor edge occludes distal to the cingulum of the upper incisor
- Profound hypodontia (>1 missing tooth per quadrant)
- Subjects beyond pubertal growth stage
- Suspected or identifiable syndromes
- Subjects with cleft lip and palate
- Growth anomalies or taking growth accelerating/ inhibiting medication
Sites / Locations
- Dundee Dental Hospital
Arms of the Study
Arm 1
Arm 2
Experimental
No Intervention
Intervention group
Control group
A standard initial lateral cephalogram radiograph will be taken of all subjects, unless this is already available within the specified age range. An intra-oral scanner will be used to accurately record the occlusal relationships prior to insertion of the fixed anterior bite plane (bite turbos) (T0) and repeated immediately after placement (T1). Each subject will then be re-scanned on a six weekly basis for a period of six months (T2-T5). Conventional clinical photographs and three-dimensional stereophotogrammetry will be used to assess the vertical facial relationships at T0-T5. A further lateral cephalogram radiograph will be taken at T5.
A control group of subjects from the treatment waiting list who meet the inclusion criteria will be used. An intra-oral scanner will record the baseline occlusal relationship (T0) and will be repeated after six months (T5). The control group will also have a standard pre-treatment lateral cephalogram radiograph taken, as well as conventional and three-dimensional stereophotogrammetry at baseline (T0) and after six months (T5). This will allow changes resulting from growth to be assessed whilst no active orthodontic treatment has taken place.