CompletedNot Applicable

Effects of Asymmetric Rapid Maxillary Expansion on Dentoskeletal Structures in Mixed Dentition

30 participantsStarted 2007-04

Plain-language summary

The aim of this clinical trial was to determine the efficacy of a locked modified bonded acrylic rapid maxillary expansion appliance, also known as an asymmetric rapid maxillary expansion appliance (ARME), in patients with a true unilateral posterior crossbite resulting from transversal maxillary deficiency in the mixed dentition.

Who can participate

Age range

7 Years – 10 Years

Sex

ALL

See this in plain English?

AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.

Inclusion Criteria: * mixed dentition * true unilateral posterior crossbite * erupted first permanent molars and incisors * all deciduous canines and molars or no more than one missing deciduous molar * no history of orthodontic treatment * no systemic disease * no pathological periodontal status * no excessive gagging reflex. Exclusion Criteria: * poor oral hygiene * caries

Questions worth asking your doctor

Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.

1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?

Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.

Questions for the trial coordinator

The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.

1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?

A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.

What they're measuring

Widths of skeletal structures

Timeframe: Before expansion (T1),through expansion completion,an average 1 month (T2),and through retention completion, an average 3 months (T3)

Skeletal maxillomandibular width ratios

Timeframe: Before expansion(T1),through expansion completion an average 1 month(T2),and through retention completion an average 3 months(T3)

Inclinations of upper and lower first molars

Timeframe: Before expansion(T1),through expansion completion an average 1 month(T2),and through retention completion an average 3 months(T3)

Amount of movement of deciduous canines and first molars in the transversal plane on the crossbite and non-crossbite sides.

Timeframe: Before expansion(T1),through expansion completion an average 1 month(T2),and through retention completion an average 3 months(T3)

Intercanine and intermolar distance on dental cast

Timeframe: Before expansion(T1),through expansion completion an average 1 month(T2),and through retention completion an average 3 months(T3)

Trial details

NCT IDNCT06486324

SponsorCelal Irgin

Sponsor typeOTHER

Study typeINTERVENTIONAL

Primary completion2009-04

View on ClinicalTrials.gov More Maxillary Anomaly trials

Plain-language summary

Who can participate

Age range

7 Years – 10 Years

Sex

ALL

See this in plain English?

AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.

What they're measuring

Widths of skeletal structures

Timeframe: Before expansion (T1),through expansion completion,an average 1 month (T2),and through retention completion, an average 3 months (T3)

Skeletal maxillomandibular width ratios

Timeframe: Before expansion(T1),through expansion completion an average 1 month(T2),and through retention completion an average 3 months(T3)

Inclinations of upper and lower first molars

Timeframe: Before expansion(T1),through expansion completion an average 1 month(T2),and through retention completion an average 3 months(T3)

Amount of movement of deciduous canines and first molars in the transversal plane on the crossbite and non-crossbite sides.

Timeframe: Before expansion(T1),through expansion completion an average 1 month(T2),and through retention completion an average 3 months(T3)

Intercanine and intermolar distance on dental cast

Timeframe: Before expansion(T1),through expansion completion an average 1 month(T2),and through retention completion an average 3 months(T3)