This study aims to evaluate and compare the inclination of the lower and upper permanent first molars and the transversal width of the lower and upper jaws in individuals of different age groups to evaluate whether the existing anomaly at different ages in individuals with a bilateral posterior crossbite. For this reason, first molar tooth inclination and lower and upper jaw transversal width will be evaluated in adolescent and post-adolescent individuals with a bilateral posterior crossbite.
Who can participate
Age range
12 Years – 18 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
. Absence of a syndrome or disease affecting the craniofacial and general systemic condition
. Patients who have applied for treatment due to the need for orthodontic treatment
. Adequate radiographic and three-dimensional dental model records before treatment
. Bilateral posterior crossbite
. Absence of anterior crossbite
. Absence of loss of lower and upper first permanent molars and eruption of all 4 permanent molars
. Absence of a syndrome or disease affecting the craniofacial and general systemic condition
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
1
Mandibular and maxillary first molar positions
Timeframe: At the beginning of the examination, it will be evaluated as an average of 10 minutes for each patient's lower and upper jaw.
2
Dimensions of the upper dental arch in the transverse direction
Timeframe: At the beginning of the examination, it will be evaluated as an average of 15 minutes for each patient's maxilla.
3
Dimensions of the lower dental arch in the transverse direction
Timeframe: At the beginning of the examination, it will be evaluated as an average of 15 minutes for each patient's mandible.
4
Evaluation of the transverse dimensions of the lower and upper jaws between different age groups
Timeframe: At the beginning of the examination, it will be evaluated as an average of 25 minutes for each patient's mandible.