Comparison of Maxillary Protraction Using Tooth-borne Facemask Versus Skeletal Anchorage Chin-plate in Class III Growing Patients
Skeletal and Dentoalveolar Effects of Tooth-borne Facemask Versus Skeletal Anchorage Chin-plate Maxillary Protraction in Growing Class III Patients.
1 other identifier
interventional
36
0 countries
N/A
Brief Summary
This retrospective non-randomized controlled clinical trial aimed to compare the skeletal and dentoalveolar effects of two orthopedic treatment protocols for skeletal Class III malocclusion in growing patients: a conventional tooth-borne rapid maxillary expansion combined with facemask therapy, and a hybrid skeletal anchorage expander combined with chin-plate traction. Lateral cephalometric changes before and after maxillary protraction were analyzed to assess sagittal skeletal correction and dentoalveolar effects.
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at P25-P50 for not_applicable
Started Feb 2026
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
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Study Timeline
Key milestones and dates
First Submitted
Initial submission to the registry
January 20, 2026
CompletedStudy Start
First participant enrolled
February 1, 2026
CompletedFirst Posted
Study publicly available on registry
February 3, 2026
CompletedPrimary Completion
Last participant's last visit for primary outcome
December 1, 2026
ExpectedStudy Completion
Last participant's last visit for all outcomes
March 1, 2027
February 3, 2026
January 1, 2026
10 months
January 20, 2026
January 28, 2026
Conditions
Keywords
Outcome Measures
Primary Outcomes (1)
Change in sagittal skeletal relationship
Changes in the cephalometric angles SNA, ANB, and Wits appraisal measured on lateral cephalograms between T0 and T1
From baseline (T0) through study completion, an average of 1 year (T1)
Secondary Outcomes (3)
Cephalometric vertical skeletal changes
From baseline (T0) through study completion, an average of 1 year (T1)
Cephalometric dentoalveolar changes
From baseline (T0) through study completion, an average of 1 year (T1)
Treatment duration
From baseline (T0) through study completion, an average of 1 year (T1)
Study Arms (2)
Tooth-Borne Expander with Facemask (FM)
ACTIVE COMPARATORBonded acrylic splint-type Hyrax expander with hooks in the maxillary canine region. Expansion activated once daily (0.25 mm). Facemask therapy initiated two weeks after expansion onset with 400 g per side of elastic traction, directed approximately 30° downward relative to the occlusal plane, worn 14-16 hours per day.
Hybrid Skeletal Anchorage Expander with Chin-Plate (SA)
EXPERIMENTALModified Hybrid Hyrax expander supported by first molars and anchored with miniscrews placed bilaterally in a paramedian position. Expansion activated once daily (0.25 mm). Mandibular chin-plates (bollard-type or single chin-plate depending on eruption stage) were surgically inserted, and Class III elastics delivering 400 g per side were applied following a progressive loading protocol.
Interventions
Bonded acrylic splint-type Hyrax expander with hooks in the maxillary canine region. Expansion activated once daily (0.25 mm). Facemask therapy initiated two weeks after expansion onset with 400 g per side of elastic traction, directed approximately 30° downward relative to the occlusal plane, worn 14-16 hours per day.
Modified Hybrid Hyrax expander supported by first molars and anchored with miniscrews placed bilaterally in a paramedian position. Expansion activated once daily (0.25 mm). Mandibular chin-plates (bollard-type or single chin-plate depending on eruption stage) were surgically inserted, and Class III elastics delivering 400 g per side were applied following a progressive loading protocol.
Eligibility Criteria
You may qualify if:
- Growing patients (CVS1-CVS3)
- Patent midpalatal suture (stages A-C)
- Skeletal Class III malocclusion (ANB \< 0°, Wits \< -2 mm)
You may not qualify if:
- Severe craniofacial asymmetry
- Evidence of active condylar growth
- Previous orthodontic treatment
- Craniofacial malformations or syndromes
- Systemic diseases or medications affecting growth or bone metabolism
Contact the study team to confirm eligibility.
Sponsors & Collaborators
MeSH Terms
Conditions
Condition Hierarchy (Ancestors)
Central Study Contacts
Study Design
- Study Type
- interventional
- Phase
- not applicable
- Allocation
- NON RANDOMIZED
- Masking
- NONE
- Purpose
- TREATMENT
- Intervention Model
- PARALLEL
- Sponsor Type
- OTHER
- Responsible Party
- PRINCIPAL INVESTIGATOR
- PI Title
- Full Professor
Study Record Dates
First Submitted
January 20, 2026
First Posted
February 3, 2026
Study Start
February 1, 2026
Primary Completion (Estimated)
December 1, 2026
Study Completion (Estimated)
March 1, 2027
Last Updated
February 3, 2026
Record last verified: 2026-01