Malocclusion, Angle Class III
Conditions
Interventions
This is a two-arm, non-randomized controlled clinical study. There will be a total of 30 participants. Experimental group: 15 patients with Class III skeletal malocclusion who will undergo the Surger
Sponsors
Universidade do Estado do Rio de Janeiro
Universidade do Estado do Rio de Janeiro
Eligibility
Age
18 Years to No maximum
Inclusion criteria
Inclusion criteria: Anteroposterior relationship between the maxillary and mandibular bone bases less than zero degrees; Wittes index negative; etiology related to mandibular excess, maxillary deficiency, or a combination of both; concave profile; presence of at least 3 stable occlusal contact points to ensure both surgical and postoperative stability; need for bimaxillary surgery with LeFort I osteotomy and bilateral sagittal osteotomy, and genioplasty; and absence of residual bone growth
Exclusion criteria
Exclusion criteria: History of maxillary bone surgery or facial trauma or bone pathologies; total edentulism; a pronounced curve of Spee of more than 3mm; use of any medication contraindicated for surgical treatment; joint or autoimmune syndromes and diseases
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Long-term skeletal changes in Class III patients undergoing orthognathic surgery using the Surgery-First approach treated with orthodontic aligners and fixed appliances in the following anatomical planes: 1) Sagittal plane: anteroposterior analysis of the distance in millimeters from the deepest point of the premaxilla contour (Point A), the deepest point of the mandibular alveolar process contour (Point B) and the most anterior point of the mandibular symphysis contour (Pog); vertical analysis of the angle between the mandibular plane (GoMe) and the Frankfurt plane (PoOr). 2) Coronal plane: analysis of the distance in millimeters in the medial-lateral direction from the point on the curve of the jugal process at the intersection of the contour of the maxillary tuberosity (J) and the point on the lower edge of the antegonial tubercle (Ag). | — |
Secondary
| Measure | Time frame |
|---|---|
| To assess whether the use of orthodontic aligners (Invisalign System) has an impact on the accuracy of surgical planning in patients with Class III malocclusion undergoing the surgery-first approach, comparing them with patients who underwent the same surgical procedure but using conventional fixed appliances. | — |
Countries
Brazil
Contacts
Public ContactLuana Silva
Universidade do Estado do Rio de Janeiro - UERJ
Outcome results
None listed