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Maxillary Arch Distalization With Infrazygomatic Crest Miniscrews for Class II Malocclusion
Sponsor: Mansoura University
Summary
This prospective clinical study will evaluate the effects of moving the entire upper dental arch backward using infrazygomatic crest miniscrews in participants with Class II malocclusion. Class II malocclusion is a type of bite problem in which the upper and lower teeth do not have a normal front-to-back relationship. Infrazygomatic crest miniscrews provide temporary skeletal anchorage that can be used to move the upper teeth backward while reducing dependence on patient cooperation. Participants will receive orthodontic treatment using bilateral infrazygomatic crest miniscrews connected to the upper orthodontic archwire through power arms and elastomeric chains. Changes produced by treatment will be evaluated using clinical photographs, radiographs, and digital dental models obtained before distalization and after correction of the Class II molar relationship. The study will assess dental, skeletal, soft-tissue, and maxillary arch changes associated with this treatment approach.
Official title: Total Arch Maxillary Distalization Using Infrazygomatic Crest Miniscrews In the Treatment of Class II Malocclusion: A Prospective Study
Key Details
Gender
All
Age Range
15 Years - 30 Years
Study Type
INTERVENTIONAL
Enrollment
16
Start Date
2026-09-15
Completion Date
2027-06-20
Last Updated
2026-10-15
Healthy Volunteers
No
Conditions
Interventions
Infrazygomatic Crest Miniscrews
Two bilateral infrazygomatic crest miniscrews (Ortho Central, Korea), 2 mm in diameter and 12 mm in length, will be used as skeletal anchorage for en-masse maxillary arch distalization. The miniscrews will be inserted in the infrazygomatic crest region, commonly between the maxillary first and second molars, approximately 11 mm above the occlusal plane. Six-millimeter power arms will be placed bilaterally between the maxillary lateral incisor and canine. Closed elastomeric power chains will connect the miniscrews to the archwire hooks, applying approximately 350 g of distalizing force.