Evaluation of Treatment Outcomes of Interceptive Orthodontic Intervention for Class Iii Malocclusion Using Inclined Plane Appliance Combined With Variable Bracket Placement

N/ACompletedNCT07581990

Can Tho University of Medicine and Pharmacy36 enrolled

Overview

Study Title: Evaluation of Treatment Outcomes of Interceptive Orthodontic Intervention for Class III Malocclusion Using Inclined Plane Appliance Combined With Variable Bracket Placement Objective: To evaluate the clinical and radiographic outcomes of interceptive orthodontic treatment for skeletal Class III malocclusion in children Participants: Children aged 7 to 12 years diagnosed with skeletal Class III malocclusion (ANB \< 0°, Wits \< -2mm) and cervical vertebral maturation stages CS1, CS2, or CS3, treated at the Ho Chi Minh City Hospital of Odonto-Stomatology from 2025 to 2026 Methodology: This is a descriptive study with a non-controlled clinical intervention The treatment involves the application of a fixed inclined plane appliance on the mandibular teeth combined with variable bracket placement (bonded at a 180-degree rotation) on the maxillary anterior teeth to promote the forward movement of the upper incisors and stimulate maxillary alveolar bone growth Evaluation: Treatment efficacy is assessed after 6 months by comparing skeletal, dental, and soft tissue changes using standardized lateral cephalometric radiographs and Cone Beam Computed Tomography (CBCT) Success is defined by achieving a positive overjet (≥2mm), overbite (≥2mm), and an Angle Class I molar relationship

Study Type

INTERVENTIONAL

Allocation

Purpose

TREATMENT

Masking

NONE

Enrollment

Conditions

Class III Malocclusion Facemask

Eligibility

Sex: ALLMin age: 7 YearsMax age: 12 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: * Age: Patients between 7 and 12 years old * Skeletal Maturity: Cervical vertebral maturation (CVM) stages CS1, CS2, or CS3 * Diagnosis: Diagnosed with skeletal Class III malocclusion on lateral cephalometric radiographs, characterized by an ANB angle \< 0° and a Wits appraisal \< -2mm * Patients and their legal guardians provide informed consent to participate in the study Exclusion Criteria: * Dental Characteristics: Absence of anterior crossbite * Eruption Status: Permanent maxillary central incisors have not yet erupted * Molar Relationship: Molar relationship is not Class III according to Edward H. Angle's classification * Skeletal/Growth Issues: Excessive mandibular growth * Congenital Conditions: Congenitally missing maxillary first molars or presence of cleft lip and/or palate

Outcomes

Primary Outcomes

Treatment success of interceptive orthodontic intervention for skeletal Class III malocclusion

Evaluation of treatment success based on clinical and radiographic criteria. Success is defined as achieving: Positive overjet (OJ ≥ 2mm) . Positive overbite (OB ≥ 2mm) . Angle Class I molar relationship . The assessment includes measuring changes in skeletal, dental, and soft tissue parameters using standardized lateral cephalometric radiographs and Cone Beam Computed Tomography (CBCT)

Time frame: 6 months after the start of the intervention