Comparing the Efficacy of Maxillary Total Arch Distalization Using Zygomatic Mini-screw vs. Palatal Mini-screw

Comparing the Efficacy of Maxillary Total Arch Distalization Using Zygomatic Mini-screw vs. Palatal Mini-screw: A Randomized Clinical Trial

Status

Recruiting

Phases

Phase 2

Study type

Interventional

Source

IRCT

Registry ID

IRCT20241008063291N1

Enrollment

Registered

2025-04-19

Start date

2025-05-20

Completion date

Unknown

Last updated

2025-07-21

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Class II skeletal patients. Malocclusion, Angle's class II

Interventions

Intervention 1: First Intervention group: In the first group, for distalization of the maxillary arch, Jeil JS 2mm×12mm mini screws (Korea, Seoul) are used, which are placed in the infrazygomatic cres

Eligibility

Sex/Gender

All

Age

14 Years to 25 Years

Inclusion criteria

Inclusion criteria: Individuals exhibiting a mild Class 1 or Class 2 skeletal relationship with an overjet ranging from 4 to 6 mm and an A point - Nasion - B point angle (ANB) between 1 and 5 degrees Class 2 canine relationship and Class 2 half cusp molar relationship bilaterally Aged between 14 to 25 years With a crowding measurement of less than 5 mm indicating the suitability for a non-extraction treatment plan All permanent teeth fully erupted, excluding the wisdom teeth Frankfort-Mandibular plane angle (FMA) between 22 and 28 degrees

Exclusion criteria

Exclusion criteria: Systemic disease or the use of pharmacological agents influencing bone metabolism Complications such as posterior crossbite, dental anomalies, skeletal asymmetry, and syndromic conditions Improper oral hygiene Prior history of orthodontic intervention Smoker

Design outcomes

Primary

Measure	Time frame
Maxillary first molar position measurements. Timepoint: At the beginning of the study (before the start of the intervention) and at the end of the treatment. Method of measurement: Dolphin Imaging 11.8 Premium software.;Occlusal plane angle. Timepoint: At the beginning of the study (before the start of the intervention) and at the end of the treatment. Method of measurement: Dolphin Imaging 11.8 Premium software.;Maxillary central incisor angle. Timepoint: At the beginning of the study (before the start of the intervention) and at the end of the treatment. Method of measurement: Dolphin Imaging 11.8 Premium software.	—

Measure

Time frame

Maxillary first molar position measurements. Timepoint: At the beginning of the study (before the start of the intervention) and at the end of the treatment. Method of measurement: Dolphin Imaging 11.8 Premium software.;Occlusal plane angle. Timepoint: At the beginning of the study (before the start of the intervention) and at the end of the treatment. Method of measurement: Dolphin Imaging 11.8 Premium software.;Maxillary central incisor angle. Timepoint: At the beginning of the study (before the start of the intervention) and at the end of the treatment. Method of measurement: Dolphin Imaging 11.8 Premium software.

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Countries

Iran (Islamic Republic of)

Contacts

Public ContactPeyman Zamanipour

Mashhad University of Medical Sciences

zmppeyman@gmail.com+98 51 3864 9855

Outcome results

None listed

Source: IRCT (via WHO ICTRP) · Data processed: Feb 4, 2026