This study will assess the dentoskeletal effects of two types of maxillary expanders in orthodontic patients in the mixed dentition, from 7 to 11 years old. Half of participants will be treated using the expander with differential opening, while the other half will undergo rapid maxillary expansion using the fan-type expander. The null hypothesis is that there is no difference between dentoskeletal effects of the two protocols.
Age range
7 Years – 11 Years
Sex
ALL
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AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
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.
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
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.
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
Maxillary and mandibular arch width (mm)
Timeframe: 6 months
Maxillary and mandibular arch length
Timeframe: 6 months
Maxillary and mandibular arch perimeter (mm)
Timeframe: 6 months
Nasal cavity width (mm)
Timeframe: 6 months
Maxillary width (mm)
Timeframe: 6 months
Maxillary molars inclination (°)
Timeframe: 6 months
Maxillary deciduous canines inclination (°)
Timeframe: 6 months
Amount of interincisor diastema (mm)
Timeframe: 10 days
Opening of the midpalatal suture (mm)
Timeframe: 10 days