Treatment Effects of Vertical Holding Appliance in Comparison to Zachrisson Transpalatal Arch on Anterior Open Bite Correction

January 23, 2026 updated by: Ola Alaa Yehia, Cairo University

Treatment Effects of Vertical Holding Appliance in Comparison to Zachrisson Transpalatal Arch on Anterior Open Bite Correction During Mixed Dentition: A Randomized Controlled Trial

The aim of the study is to assess the treatment effects of ZTPA versus VHA in the correction of anterior open bite in mixed dentition.

Study Overview

Status

Recruiting

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Estimated)

38

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact Backup

Study Locations

  • Egypt
      • Cairo, Egypt
        • Recruiting
        • Faculty of Dentistry Cairo University

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Child

Accepts Healthy Volunteers

Yes

Description

Inclusion Criteria:

  1. Children with the age rage from 6-12 years old.
  2. Both male and female.
  3. Class I and II skeletal and dental.
  4. Skeletal anterior open bite.
  5. Maxillary and mandibular incisors and upper first molars erupted.
  6. Good oral hygiene.

Exclusion Criteria:

  1. Systemic disease.
  2. Missing teeth.
  3. Previous orthodontic treatment.
  4. Presence of posterior crossbites.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Single

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Active Comparator: vertical holding appliance
a transpalatal arch with acrylic button
Device: Vertical holding appliance
transpalatal arch with arcylic button
Experimental: Zachrisson transpalatal arch
a transpalatal arch with 2 posterior loops and 1 anterior loop
Device: Zachrisson transpalatal arch
transpalatal arch with 2 posterior loops and 1 anterior loop

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Vertical skeletal measurements using cephalometric analysis
Time Frame: 9 months
9 months

Secondary Outcome Measures

Outcome Measure
Time Frame
Overbite reduction
Time Frame: 9 months
9 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Cairo University

Investigators

  • Principal Investigator: ola a yehia, master student, Cairo University

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

January 1, 2024

Primary Completion (Actual)

June 1, 2025

Study Completion (Estimated)

June 1, 2026

Study Registration Dates

First Submitted

January 23, 2026

First Submitted That Met QC Criteria

January 23, 2026

First Posted (Actual)

January 30, 2026

Study Record Updates

Last Update Posted (Actual)

January 30, 2026

Last Update Submitted That Met QC Criteria

January 23, 2026

Last Verified

January 1, 2026

More Information

Terms related to this study

Other Study ID Numbers

  • 3-3-4

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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