An observational study in Impacted Third Molar Tooth, sponsored by Central Hospital, Nancy, France. Recruiting at 1 site in France. Open to participants aged 15 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2025-03-28.
Sponsored by Central Hospital, Nancy, France · Observational
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.
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.
122 studies on the registry are indexed under Tooth, Impacted; 15 are open to participants now.
This study's planned enrollment of 80 is below the median of 105 across 31 observational studies indexed under Tooth, Impacted.
Browse Tooth, Impacted studies →Central Hospital, Nancy, France is the lead sponsor of 798 studies on the registry; 186 are open to participants now.
Counted across the registry records on this site, refreshed daily.
French adults with at least one impacted third molar
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
Patient with class I occlusion, with at least one impacted third molar
Other: Radiographic measurement
Patients with class II malocclusion, with at least one impacted third molar
Other: Radiographic measurement
Patients with class III malocclusion, with at least one impacted third molar
Other: Radiographic measurement
Measurements taken on 3D radiographs, to assess third molar inclusion and skeletal typology (vertical and sagittal)
Distance between the occlusal plane and the second molar
Depth of the third molar in mm
Time frame: One day
Angle of the third molar
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)
Time frame: One day
Plan to share: Undecided
Started Dec 2024 (actual). Primary completion is estimated for Jul 2025, 7 months after the start.
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Central Hospital, Nancy, France →