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

Recruiting

• Conditions: Impacted Third Molar Tooth

• Registration Number: NCT06320665
• Lead Sponsor: Central Hospital, Nancy, France

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.

Study Timeline

• Study First Submitted: 2024-02-06
• Study First Submitted QC: 2024-03-19
• Study First Posted: 2024-03-20
• Study Start: 2024-12-01
• Status Verified: 2025-03
• Last Update Submitted: 2025-03-25
• Last Update Posted: 2025-03-28
• Primary Completion: 2025-07-30
• Study Completion: 2025-09-30

Recruitment & Eligibility

• Status: RECRUITING
• Sex: All
• Target Recruitment: 80

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

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
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)

Trial Locations

Locations (1)

Département d'Orthopédie dento-faciale; 🇫🇷 Nancy, France