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OpenTrials
Active, Not Recruiting

NCT Number: NCT07480148

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

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

Active, Not Recruiting

This study is active but is not currently recruiting participants.

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Key information

Conditions

Mandibular Expansion

Age range

12 year–16 year

Sex eligibility

Female

Study type

Interventional

Phase

Not applicable

Primary location

Alazhar

Naşr, Egypt

About this study

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.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

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.

Treatment and study plan

self activated leaf expander

Device

Eight patients will be treated by self-activated leaf expander that does not need activation by the patient.

williams's expander

Device

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.

Primary outcomes

  1. 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.

Sponsors and collaborators

Lead sponsor

Al-Azhar University

Other

Registry information

Official study title

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

Important dates

Study start
2024
Primary completion
2026
Study completion
2026
First posted
Mar 18, 2026
Registry last updated
Mar 18, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.