Efficacy of anterior intrusion-based vertical control versus conventional sagittal retraction in adolescents with hyperdivergent mandibular retrognathia: study protocol for a randomised controlled trial.

ABSTRACT:

Introduction

Hyperdivergent skeletal class II malocclusion in adolescents is characterised by mandibular retrognathia with excessive vertical growth and clockwise mandibular rotation, which can worsen facial profile and airway-related morphology. Although mandibular advancement approaches are commonly used, they may increase the vertical dimension and are suboptimal for patients with long-face patterns. This randomised controlled trial aims to evaluate a micro-implant-assisted protrusion correction technique designed to flatten the occlusal plane and promote counterclockwise mandibular rotation, thereby improving facial profile and pharyngeal space.

Methods and analysis

This trial is registered at the Chinese Clinical Trial Registry (ChiCTR; ChiCTR2100054105). This is a two-

SUBMITTER: Shi S 

PROVIDER: S-EPMC12863360 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature