Comparing two jaw expanders for underbite in children
Part of Mouth & dental clinical trials.
This study compares two ways to fix an underbite and narrow upper jaw in growing children: a special type of clear aligner (Invisalign) and a traditional rapid palatal expander with a facemask. The goal is to see which method works better to widen the upper jaw and correct the bite.
Summary written for real people, not researchers, by Clin2.
Who can take part
- Age 8–12 years at the start of treatment.
- A mix of baby teeth and permanent teeth, or early adult teeth, with at least three strong teeth on each side of the jaw.
- Good oral hygiene and healthy gums.
- An underbite (lower jaw sticking out) and a narrow upper jaw (like a crossbite or a jaw that's too small).
- No cleft lip or palate, no previous jaw expansion treatment, and no health conditions that would make braces unsafe.
Quick eligibility check
Answer a few plain-language questions, based on this study's own requirements, to get a preliminary sense of fit.
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