Clear aligners have exploded in popularity over the past two decades. You've probably seen the ads, heard friends talk about them, or wondered if they're too good to be true. So, do they really work? The short answer is yes—when used appropriately and as directed. Millions of people have achieved straighter smiles with clear aligners. But like any orthodontic treatment, success depends on the complexity of your case, the skill of your provider, and your commitment to wearing them. Here's what the evidence and experience show.
Yes, Clear Aligners Can Straighten Teeth
Clear aligners use the same fundamental principle as braces: gentle, consistent pressure on teeth causes the bone around them to remodel, allowing the teeth to move. The difference is that aligners apply that pressure through a series of custom-made plastic trays that you change every week or two. Each new tray moves your teeth a small step toward the final position. When worn as directed—typically 20–22 hours per day—they're effective for a wide range of orthodontic concerns.
What Can They Treat?
Clear aligners work well for:
- Crowding — Making room for teeth that are overlapping or rotated
- Gaps — Closing spaces between teeth
- Minor to moderate bite issues — Some overbites, underbites, and crossbites can be improved
- Alignment — Straightening crooked front teeth or improving overall smile appearance
They're particularly well-suited for adults with mild to moderate issues who want a discreet, removable option.
When Might Braces Be Better?
Aligners aren't the answer for every case. Braces may be recommended when:
- Complex tooth movements — Certain rotations or vertical movements can be harder to achieve with aligners
- Severe bite issues — Some skeletal or severe bite problems may require braces (or surgery plus braces)
- Compliance concerns — For patients who may not wear aligners consistently, fixed braces ensure the appliance is always in place
- Patient preference — Some people simply prefer braces
Your orthodontist will evaluate your case and recommend the best option.
Success Depends on You
Aligners only work when you wear them. The recommended 20–22 hours per day isn't arbitrary—it's the amount of time needed for the pressure to be effective. If you leave them out for long stretches, treatment slows down or stalls. Compliance is one of the biggest predictors of success. If you're committed to wearing them as directed, you're setting yourself up for a good outcome.
Choosing a Qualified Provider
Not all aligner treatment is equal. Working with a dentist or orthodontist who is trained and experienced in clear aligner therapy matters. They'll assess whether aligners are right for your case, design an appropriate plan, and monitor your progress. DIY or mail-order aligners without professional oversight can be risky—and may not deliver the results you want.
The Bottom Line
Clear aligners really do work—for the right patients, with the right plan, and with consistent wear. If you're considering them, schedule a consultation. A qualified provider can evaluate your teeth, explain whether aligners are a good fit, and help you achieve the straighter smile you're looking for.