Impacted Third Molar Tooth
Conditions
Keywords
Cone beam ct, third molar, Vertical dimension, Impacted teeth, Orthodontic, Adult, Skeletal pattern
Brief summary
The objective is to compare the sagittal and vertical skeletal parameters of patients with an impacted third molar. Patients will be analyzed according to their skeletal characteristics: skeletal class (sagittal direction) and facial skeletal typology (vertical direction). The inclusion characteristics of third molars will also be analyzed, to see the links between typology and inclusion. The principal hypothesis is no significant difference in third molar inclusion patterns in relation to skeletal divergence.
Detailed description
The study is a non-interventional (observational) research involving the human person, research on existing data (retrospective study) and samples dealing with dentofacial orthopedics. This study analyzes third molar inclusion patterns in relation with the skeletal characteristics, sagittal and vertical typology. This is a comparative retrospective study of radiographs in three dimensions before any orthodontic treatment. The patients studied are at Bacchetti CS stage 5 (adults), and the third molar must be at least at Nolla stage 6 of formation. There is no control group but there are subgroups depending of the skeletal characterics.
Interventions
Measurements taken on 3D radiographs, to assess third molar inclusion and skeletal typology (vertical and sagittal)
Sponsors
Central Hospital, Nancy, France
Study design
Observational model
OTHER
Time perspective
RETROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
15 Years to No maximum
Healthy volunteers
Yes
Inclusion criteria
* CMV stage 5 on lateral radiography (end of growth) * at least one impacted third molar at minimum Nolla stage 6 development
Exclusion criteria
* Previous maxillofacial trauma * Growing patients * Missing permanent tooth or early avulsion * Dysplasia * Dentofacial deformities * Endocrinological pathologies with implications for maxillofacial growth * Syndromes * History of maxillofacial or orthognathic surgery * History of orthodontic treatment * Incomplete data
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Distance between the occlusal plane and the second molar | One day | Depth of the third molar in mm |
| Angle of the third molar | One day | The coronal-radicular axis of the mandibular third molar, and the occlusal plane of the mandibular 1st and 2nd molars, when these are in a normal, functional position on the arch (in degrees) |
Countries
France
Contacts
Primary ContactBart VANDE VANNET, PhD
Backup ContactMathilde LAE
Outcome results
None listed