Malocclusion, Angle Class II
Conditions
Keywords
aligner, inter-arch elastic, orthodontic, class II malocclusion, adult, clear aligner, orthodontic appliance, Invisalign, class II elastics, angle class II malocclusion
Brief summary
The objective is to compare the dento-alveolar therapeutic effects of wearing class II inter-arch traction elastics on aligners versus multi-brackets in an adult population. The principal hypothesis is no significant difference in therapeutic effects of using inter-arch elastics on aligners versus multi-brackets.
Detailed description
It is a non-interventional research involving the human person, research on existing data and / samples in the field of dentofacial orthopedics. This study analyzes the effects of rubber bands when combined with aligners in adult patients. This is a comparative retrospective study of radiographs and casts before and after orthodontic treatment. The patients studied are in Angle class II and adults. Two groups are analysed: patients treated with fixed (vestibular multi-attachment) and removable (Invisalign-type aligners) appliances.
Interventions
COMBINATION_PRODUCTAligner and inter-arch elastics
Correction of class II malocclusion by class II elastics on clear aligners
Sponsors
Central Hospital, Nancy, France
Study design
Observational model
OTHER
Time perspective
RETROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
13 Years to No maximum
Healthy volunteers
Yes
Inclusion criteria
* CVM stage 5 on lateral teleradiography (end of growth) * Angle Class II * Treatments with rubber bands for inter-arch traction * End of treatment in class I
Exclusion criteria
* Incomplete data * Treatment with extractions, mini-screws, mini-plate or ortho-surgical treatment * Dental agenesis (excluding wisdom teeth) * Cranial-facial syndromes
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Change in IMPA Mandibular incisor angle (degrees) | First : just before the beginning of treatment; Second : just after the end of orthodontic treatment. An average of 18 months. | Angle between the mandibular plane and the lower incisor axis: position of the lower incisor in relation to the mandible |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Duration of treatment | 24 months | Treatment time duration in month |
| Change in interproximal dental size | First : just before the beginning of treatment; Second : just after the end of orthodontic treatment. An average of 18 months | Interproximal size in mm |
| Change in skeletal sagittal pattern ANB angle | First : just before the beginning of treatment; Second : just after the end of orthodontic treatment. An average of 18 months | Cephalometric measurements : angle between A, Na (nasion) and B in degrees |
| Change in skeletal sagittal pattern Ao-Bo | First : just before the beginning of treatment; Second : just after the end of orthodontic treatment. An average of 18 months | Cephalometric measurements : mesure in mm between Ao and Bo |
| Change in skeletal vertical pattern : FMA | First : just before the beginning of treatment; Second : just after the end of orthodontic treatment. An average of 18 months | Cephalometric measurements : angle in degrees between franckfort plan and mandibular plan. |
| Change in skeletal vertical pattern : Sn Gogn | First : just before the beginning of treatment; Second : just after the end of orthodontic treatment. An average of 18 months | Cephalometric measurements : angle in degrees between SN and GoGn |
| Change in faciale anterior height | First : just before the beginning of treatment; Second : just after the end of orthodontic treatment. An average of 18 months | Cephalometric measurements of faciale anterior height |
| Change in faciale posterior height | First : just before the beginning of treatment; Second : just after the end of orthodontic treatment. An average of 18 months | Cephalometric measurements of faciale posterior height |
| Change in index Faciale height | First : just before the beginning of treatment; Second : just after the end of orthodontic treatment. An average of 18 months | Cephalometric measurements, index HFP (faciale posterior heigth)/ HFA (faciale anterior height) |
| Change in nterincisal angle | First : just before the beginning of treatment; Second : just after the end of orthodontic treatment. An average of 18 months | Cephalometric measurements : measurement between manxillary and mandibular incisors. |
| Change in plan of occlusion | First : just before the beginning of treatment; Second : just after the end of orthodontic treatment. An average of 18 months | Cephalometric measurements : angle between SN and Op |
| Sex | 1 month | Sex |
| Age at the end of treatment | 24 months | Age |
| Change in von Spee curve | First : just before the beginning of treatment; Second : just after the end of orthodontic treatment. An average of 18 months | Measurements on impressions : it is the average of the distance between the highest point of the deepest cusp and the occlusal plane. |
| Change in overall crowding | First : just before the beginning of treatment; Second : just after the end of orthodontic treatment. An average of 18 months | Measurements on impressions : comparison of the sum of the mesiodistal diameters of 35 to 45 and the arch perimeter from the mesial face of 36 to the mesial face of 46. |
| Change in overjet | First : just before the beginning of treatment; Second : just after the end of orthodontic treatment. An average of 18 months | Measurements on impressions : in mm |
| Change in overbite | First : just before the beginning of treatment; Second : just after the end of orthodontic treatment. An average of 18 months | Measurements on impressions : in mm |
| Change in arch length | First : just before the beginning of treatment; Second : just after the end of orthodontic treatment. An average of 18 months | Measurements on impressions : distance between inter incisal point and mesiale face of 6. |
| CHange in class II quantity | First : just before the beginning of treatment; Second : just after the end of orthodontic treatment. An average of 18 months | Measurements on impressions : inter canine and inter molar relations |
| Change in space required | First : just before the beginning of treatment; Second : just after the end of orthodontic treatment. An average of 18 months | Measurements on impressions : sum of all mesiodistal diameter. |
| Change in inter canine distance | First : just before the beginning of treatment; Second : just after the end of orthodontic treatment. An average of 18 months | Measurements on impressions : distance between the canine in mm |
| Change in inter premolar distance | First : just before the beginning of treatment; Second : just after the end of orthodontic treatment. An average of 18 months | Measurements on impressions : distance between the premolars |
| Change in inter molar distance | First : just before the beginning of treatment; Second : just after the end of orthodontic treatment. An average of 18 months | Measurements on impressions : distance between the molars |
| Age at the beginning of treatment | 1 month | Age |
Countries
France
Contacts
Primary ContactBart VANDE VANNET, Phd
Backup ContactLou DEON
Outcome results
None listed