Assessment of Vertical Pattern in Correlation With Third Molar Inclusion : A 3D CBCT Analysis

N/ARecruitingNCT06320665

Central Hospital, Nancy, France80 enrolled

Overview

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.

Study Type

OBSERVATIONAL

Enrollment

Conditions

Impacted Third Molar Tooth

Interventions

Eligibility

Sex: ALLMin age: 15 YearsHealthy volunteers:

Medical Language ↔ Plain English

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

Outcomes

Primary Outcomes

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)