Self-activated Leaf Expander Versus William's Expander in Expansion of Collapsed Mandibular Arch

March 14, 2026 updated by: Abdalla Kamal, Al-Azhar University

Self-activated Leaf Expander Versus William's Expander in Expansion of Collapsed Mandibular Arch: A Prospective Clinical Trail

Self-activated leaf expander versus William's expander in expansion of collapsed mandibular arch

Study Overview

Status

Active, not recruiting

Conditions

Intervention / Treatment

Detailed Description

The current randomized clinical study will be directed to compare the selfactivated leaf expander to William's expander for the expansion of collapsed mandibular arch.

Study Type

Interventional

Enrollment (Estimated)

16

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 Locations

  • Egypt
      • Naşr, Egypt
        • Alazhar

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:

  • An age from 12-16 years.

    • Low to average facial vertical pattern.
    • A mild to moderate crowding in mandibular arch with reduced transverse dimension which require non extraction orthodontic approach.
    • Similar amount of crowding on each side of the mandibular arch.
    • No previous orthodontic treatment.
    • Good oral and general health.

Exclusion Criteria:

  • Severe crowding.

    • Steep mandibular plane.
    • Asymmetric crowding on both sides of the arch.
    • Shifting of mandibular dental midline.
    • Impacted lower 2nd premolar.

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: Screening
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Active Comparator: self activated leaf expander
Eight patients will be treated by self-activated leaf expander that does not need activation by the patient.
Device: self activated leaf expander
Eight patients will be treated by self-activated leaf expander that does not need activation by the patient.
Active Comparator: william's expander
Eight patients will be treated with William's expander, where the arms of expander will be placed parallel to the line of occlusion at the middle of lingual surface of the anterior teeth with two bands on lower permanent first molars.
Device: williams's expander
Eight patients will be treated with William's expander, where the arms of expander will be placed parallel to the line of occlusion at the middle of lingual surface of the anterior teeth with two bands on lower permanent first molars.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Intercanine width
Time Frame: 6 months
comparing the selfactivated leaf expander to William's expander for the expansion of collapsed lower arch by CBCT mandibular arch.
6 months

Collaborators and Investigators

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

Sponsor

Al-Azhar 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)

June 15, 2024

Primary Completion (Estimated)

June 12, 2026

Study Completion (Estimated)

November 30, 2026

Study Registration Dates

First Submitted

November 18, 2024

First Submitted That Met QC Criteria

March 14, 2026

First Posted (Actual)

March 18, 2026

Study Record Updates

Last Update Posted (Actual)

March 18, 2026

Last Update Submitted That Met QC Criteria

March 14, 2026

Last Verified

March 1, 2026

More Information

Terms related to this study

Keywords

Other Study ID Numbers

  • 894/2938

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

YES

IPD Sharing Supporting Information Type

  • STUDY_PROTOCOL

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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