Millions of people across Europe live with bite issues they don't fully understand. Perhaps your upper teeth protrude a little too far, or your lower jaw juts forward when you close your mouth. Maybe a few teeth on one side sit inside the opposing arch instead of outside it. These conditions — overbites, underbites, and crossbites — are far more than cosmetic quirks. Left untreated, they can lead to uneven enamel wear, chronic jaw pain, gum recession, and difficulty chewing or speaking clearly.

The good news? Clear aligners have been shown to effectively treat mild-to-moderate versions of all six common bite and alignment conditions. In this guide, we'll break down each condition in plain, jargon-free language and explain exactly how clear aligner therapy addresses it — so you can make an informed decision about your smile.

Understanding Bite Problems: Why They Matter

Your "bite" refers to how your upper and lower teeth come together when your mouth is closed. Dentists call a misaligned bite a malocclusion. When the upper and lower arches don't meet harmoniously, it creates stress on specific teeth, the jaw joints (known as the TMJ), and the surrounding gum tissue.

Over time, an untreated malocclusion can lead to accelerated enamel erosion, increased cavity risk in hard-to-clean overlapping areas, recurring headaches and jaw clicking, and even changes to your facial profile. The encouraging part is that most bite issues are caused by tooth position rather than skeletal abnormalities — and that's precisely what clear aligners are designed to correct.

The Six Conditions Clear Aligners Treat

Smileie aligners are designed to address six of the most common dental alignment problems. Here's what each one looks like and how it affects your oral health.

How Clear Aligners Actually Fix Bite Issues

Clear aligners work by applying controlled, sequential force to specific teeth at specific times. Each aligner in your series is slightly different from the last, engineered to move your teeth incrementally — typically 0.25 to 0.3 mm per tray — toward their final, corrected positions.

Here's how the process addresses bite problems specifically:

For overbites and deep bites

The aligner trays are programmed to intrude (push upward) the over-erupted front teeth while simultaneously adjusting the position of the lower arch. This reduces the vertical overlap and brings both arches into a more balanced, functional relationship.

For underbites

Aligners work by retracting the lower front teeth backward while tipping the upper front teeth slightly forward. In mild-to-moderate cases, this dual movement is enough to correct the bite without any additional appliances.

For crossbites

The trays target the specific mispositioned teeth, applying lateral force to move them into their correct relationship with the opposing arch. For isolated crossbites affecting a few teeth, aligners are highly effective. More complex crossbites involving the full jaw width may benefit from additional treatment alongside aligners.

For overjet

Aligners gradually retract the flared upper teeth backward while adjusting the lower teeth forward, reducing the horizontal gap between the two arches.

For crowding and spacing

Crowding is resolved through a combination of arch expansion, slight tooth repositioning, and in some cases interproximal reduction (IPR) — a painless procedure where tiny amounts of enamel are buffed between teeth to create space. Research published in the journal Progress in Orthodontics found that the predictability of crowding correction with clear aligners was approximately 87% in the upper arch and 81% in the lower arch. Spacing is corrected by closing the gaps through mesial (toward-centre) tooth movement.

How Smileie Europe Treats Bite Issues

All Smileie aligners are manufactured by Clear Moves Aligners, using one of the most standardised fabrication methods in the European aligner market. Every treatment plan is supervised by an experienced dental team, meaning you receive dentist-directed care without needing repeated in-clinic appointments.

Here's how the Smileie journey works from first click to final retainer:

Clear Aligners vs. Traditional Braces for Bite Correction

Both clear aligners and metal braces can correct bite issues, but they differ significantly in terms of comfort, lifestyle impact, and cost. Here's how they compare for the conditions we've discussed:

For the vast majority of people with mild-to-moderate overbites, underbites, crossbites, overjet, crowding, or spacing, clear aligners offer a discreet, comfortable, and significantly more affordable path to a corrected bite — without the lifestyle disruption of traditional braces.

Frequently Asked Questions