CompletedNot Applicable

The Effectiveness of Clear Aligner and Traditional Fixed Appliances in Achieving Good Occlusion in Complex Orthodontic Cases

Syria36 participantsStarted 2019-05-11

Plain-language summary

Patients who have severe crowding that requires four premolars extraction will be treated in this study. The efficacy and effectiveness of in-house clear aligners therapy compared with vestibular fixed appliances in the treatment of severe crowding malocclusion cases requiring the extraction of first premolars will be evaluated using Little's irregularity index (LII), Peer assessment rating index (PAR), and treatment duration. There are two groups: First group (Experimental): the patients in this group will be treated using clear aligners. Second group (Control): the patients in this group will be treated using fixed appliances.

Who can participate

Age range

18 Years – 25 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: * Class I skeletal and dental malocclusion * severe crowding (more than 6 mm of tooth size-arch length discrepancy) * Good oral hygiene and periodontal health. * No congenitally missing or extracted teeth (except for the third molars). * No history of previous trauma to the maxillofacial region or surgical interventions. Exclusion Criteria: * Subject with psychological abnormalities. * Subject with systemic diseases. * Previous orthodontic treatment. * Subject has known allergy to latex and plastic

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

Change in PAR index

Timeframe: T0: one day before the commencement of treatment. T1: one day following the end of treatment

Changes in Little's irregularity index

Timeframe: T0: one day before the commencement of treatment. T1: one day following the end of treatment

Trial details

NCT IDNCT05500456

SponsorDamascus University

Sponsor typeOTHER

Study typeINTERVENTIONAL

Primary completion2021-03-01

View on ClinicalTrials.gov More Crowding, Tooth trials