Clear aligners have become hugely popular because they’re discreet, removable, and can be very effective when used properly. But they’re not magic, and they’re not ideal for every case.

The best outcomes happen when there’s a proper assessment, clear expectations, and good compliance. This post explains what clear aligners can treat well, where they’re limited, and how to know if you’re a good candidate.

Key takeaways

• Aligners can straighten teeth and improve mild-to-moderate crowding in many
• More complex bite issues may need braces or a different
• Wearing time Results depend heavily on compliance.
• Retainers are non-negotiable after treatment if you want

What clear aligners can do well

In the right case, aligners can be excellent for:

• mild to moderate crowding
• mild spacing
• straightening tilted teeth
• improving alignment for easier cleaning
• some bite improvements, depending on the case and plan

Many adults choose aligners because they can remove them for eating and brushing, which can make oral hygiene easier during treatment.

What aligners can struggle with

Aligners may be less predictable for certain issues, especially when:

• there are significant bite discrepancies
• teeth need large rotational movements (especially rounder teeth)
• vertical movements are needed (intrusion/extrusion)
• there are complex jaw growth issues
• compliance is likely to be low

This doesn’t mean aligners can’t help. It means the plan needs to be honest about limitations, and sometimes braces or combined approaches are more suitable.

The biggest factor people underestimate: wearing time

Aligners only work when they’re in your mouth. Most aligner systems require high daily wear time to stay on track. If you frequently leave them out, teeth don’t move as planned, refinements increase, and timelines blow out.

If you want aligners, the mindset has to be: this is a daily commitment, not a “sometimes” appliance.

What to expect during treatment

Most aligner treatment involves:

• an assessment and records (photos, scans, sometimes X-rays)
• a personalised treatment plan
• a series of aligners changed on a schedule
• periodic reviews to ensure teeth are tracking
• attachments on some teeth (small tooth-coloured bumps) to improve control
• refinements at the end in some cases

You may feel pressure or tightness when switching aligners. That’s normal. Severe pain isn’t expected and should be reviewed.

Will aligners change my face?

For most mild-to-moderate aligner cases, changes are primarily dental. Significant facial changes are less common and depend on the type and extent of movement. If facial profile concerns are part of your goal, that should be discussed upfront.

The part that matters most long-term: retainers

Teeth love to drift back. Retainers are the reason aligner results stay stable. If you don’t wear retainers as directed, teeth can shift and you can lose the result you paid for.

A good treatment plan includes a clear retention strategy.

Who is a good candidate?

Aligners tend to suit patients who:

• are motivated and consistent
• want a discreet option
• have mild-to-moderate crowding or spacing
• have healthy gums (or are willing to stabilise gums first)
• understand that retainers are part of long-term success