An underbite — where the lower jaw sits in front of the upper teeth — is one of the most commonly misunderstood cases for clear aligners. Here's what Invisalign can genuinely fix, and what it can't.
An underbite happens when the lower jaw and teeth sit in front of the upper teeth, rather than behind them. Many patients are told by a general dentist that 'aligners can't fix an underbite' — which is only partly true. The real answer depends on whether the underbite is dental (tooth position) or skeletal (jaw structure).
Dental vs Skeletal Underbite — Why the Distinction Matters
A dental underbite is caused by tooth position alone, with the jaw bones aligned normally — Invisalign Comprehensive can often fully correct this using precision attachments and staged movement. A skeletal underbite involves an actual mismatch in jaw size or position, which aligners alone cannot correct — this typically needs combined orthodontic-surgical treatment (orthognathic surgery) planned with an oral surgeon.
- Mild-to-moderate dental underbites: usually treatable with Invisalign Comprehensive alone, 12–24 months
- Underbites caused mainly by tooth position, not jaw size: good Invisalign candidates
- Severe skeletal underbites (significant jaw misalignment): usually need surgical-orthodontic combination treatment
- Growing children with early-stage underbite: often benefit from early interceptive treatment before it becomes skeletal
How We Determine Which Category You're In
At your free consultation, we take a clinical bite assessment and an iTero 3D scan. For cases where a skeletal component is suspected, we may recommend a cephalometric X-ray to properly assess jaw relationship before recommending a treatment path — rather than guessing from a visual exam alone.