Mandibular ExpansionNCT07480148
Self-activated Leaf Expander Versus William's Expander in Expansion of Collapsed Mandibular Arch
A study testing self activated leaf expander and williams's expander in people with Mandibular Expansion, run by Al-Azhar University at 1 site in Egypt.
Trial summary
Self-activated leaf expander versus William's expander in expansion of collapsed mandibular arch Read more about this study
- Who is it for?
- Ages 12 to 16 years, women onlyHealthy volunteers can take part
- Conditions the study is for
- Mandibular Expansion
- What is being tested?
- self activated leaf expander and williams's expander
- Type of treatment
- Medical device
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 16 participants
- Where
- 1 siteEgypt
- Study dates
- 15 Jun 2024to 30 Nov 2026
- Phase
- Interventional
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 12 to 16 years
- Women only
- Healthy volunteers accepted
- Child
Who may be able to join
- 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.
Who cannot join
- Severe crowding.
- Steep mandibular plane.
- Asymmetric crowding on both sides of the arch.
- Shifting of mandibular dental midline.
- Impacted lower 2nd premolar.
Trial locations and contacts
1 site in 1 country.
About this study
Official title: 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
Read the 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.
- Conditions
- Mandibular Expansion
- Being tested
- self activated leaf expander, williams's expander
- Keywords
- leaf expander
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
self activated leaf expanderDevice
Eight patients will be treated by self-activated leaf expander that does not need activation by the patient.
williams's expanderDevice
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.
| Study group | Role | What they receive |
|---|---|---|
| self activated leaf expander | Active comparator | Eight patients will be treated by self-activated leaf expander that does not need activation by the patient. Receives: Device: self activated leaf expander |
| william's expander | Active comparator | 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. Receives: Device: williams's expander |
What is being measured
The primary outcome is the main question the study is designed to answer.
Intercanine width
comparing the selfactivated leaf expander to William's expander for the expansion of collapsed lower arch by CBCT mandibular arch.
Measured: 6 months
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted18 Mar 2026
- Study start15 Jun 2024
- Primary completion12 Jun 2026 (estimated)
- Study completion30 Nov 2026 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Mandibular ExpansionStudies of the same condition, open and under way.
- More trials run by Al-Azhar UniversityThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Screening
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Enrolment
- 16 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Al-Azhar University
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Abdalla Kamal, Al-Azhar University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07480148
- Sponsor's protocol ID
- 894/2938
- Status last verified
- Mar 2026
- First submitted
- 18 Nov 2024
- Last updated
- 18 Mar 2026
- Results posted
- No
- Data monitoring committee
- Yes
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- Yes
Study at a glance
From the registry record, last updated by the sponsor on 18 Mar 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Self-activated Leaf Expander Versus William's Expander in Expansion of Collapsed Mandibular Arch: A Prospective Clinical Trail
- ClinicalTrials.gov ID
- NCT07480148
- Acronym / sponsor ID
- 894/2938
- Conditions
- Mandibular Expansion
- Keywords
- leaf expander
- Study type
- Interventional
- Recruitment status
- Active, not recruiting
- Enrolment
- 16 participants (estimated)
- Lead sponsor
- Al-Azhar UniversityUniversity, hospital or other
- Study start
- 15 Jun 2024 (actual)
- Primary completion
- 12 Jun 2026 (estimated)
- Study completion
- 30 Nov 2026 (estimated)
- First posted
- 18 Mar 2026 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Self-activated leaf expander versus William's expander in expansion of collapsed mandibular arch
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 design
- Primary purpose
- Screening
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| self activated leaf expander | Active comparator | Device: self activated leaf expanderEight patients will be treated by self-activated leaf expander that does not need activation by the patient. |
| william's expander | Active comparator | Device: williams's expanderEight 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. |
Who may qualify
- Ages
- 12 to 16 years
- Sex
- Female only
- Healthy volunteers
- Accepted
- Age groups
- Child
Key inclusion criteria (6 listed)
- An age from 12-16 years.
Key exclusion criteria (5 listed)
- Severe crowding.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| self activated leaf expanderEight patients will be treated by self-activated leaf expander that does not need activation by the patient. | Device | self activated leaf expander |
| williams's expanderEight 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 | william's expander |
Primary outcome
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.
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 18 Mar 2026.
- Individual participant dataSharing planned: Yes
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing self activated leaf expander and williams's expander in people with Mandibular Expansion, run by Al-Azhar University at 1 site in Egypt.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 6 inclusion and 5 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: under way, not looking for participants, as of the sponsor's last update on 18 Mar 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Egypt. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Intercanine width (time frame: 6 months). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 18 Mar 2026.